Opinions from H. N. Andrews 1970
- 'Aachenosaurus belongs to Plantae'
- 'Aachenosaurus multidens belongs to Aachenosaurus' according to Smets 1888
- 'Aachenosaurus multidens is recombined as Aachenoxylon multidens' according to Hovelacque 1889
- 'Aachenoxylon belongs to Angiospermae'
- 'Abacella belongs to Plantae'
- 'Abacella pertusa belongs to Abacella' according to Maslov 1956
- 'Abacodendron belongs to Lycopodiaceae'
- 'Abacodendron lutuginii belongs to Abacodendron' according to Radchenko 1956
- 'Abakaniella belongs to Plantae'
- 'Abakaniella devonica belongs to Abakaniella' according to Chachlov 1939
- 'Abeliella belongs to Plantae'
- 'Abeliella riccioides belongs to Abeliella' according to Mägdefrau 1937
- 'Abietites sternbergii belongs to Abietites' according to Nilsson 1837
- 'Abietopitys belongs to Plantae'
- 'Abietopitys perforata belongs to Abietopitys' according to Gothan 1928
- 'Abietoxylon belongs to Coniferophyta'
- 'Abietoxylon falunense belongs to Abietoxylon' according to Houlbert 1910
- 'Abiocaulis belongs to Coniferophyta'
- 'Abiocaulis yezoensis belongs to Abiocaulis' according to Suzuki 1910
- 'Acaciaephyllum belongs to Angiospermae'
- 'Acaciaephyllum longifolium belongs to Acaciaephyllum' according to Fontaine 1889
- 'Acaciaphyllites belongs to Mimosaceae'
- 'Acaciaphyllites grevilleoides belongs to Acaciaphyllites' according to Berry 1914
- 'Acacioxylon belongs to Plantae'
- 'Acacioxylon antiquum belongs to Acacioxylon' according to Schenk 1883
- 'Acacioxylon tenax belongs to Acacioxylon' according to Felix 1893
- 'Acanthocarpus belongs to Plantae'
- 'Acanthocarpus xanthioides belongs to Acanthocarpus' according to Goeppert 1864
- 'Acanthodesmia belongs to Plantae'
- 'Acanthodesmia setacea belongs to Acanthodesmia' according to Prinada 1962
- 'Acanthodiacrodium belongs to Acritarcha'
- 'Acanthodiacrodium dentiferum belongs to Acanthodiacrodium' according to Timofeev 1958
- 'Acanthophyllites belongs to Plantae'
- 'Acanthophyllites nicolai belongs to Acanthophyllites' according to Grand'Eury 1890
- 'Acanthophyton belongs to Psilophytophyta'
- 'Acanthophyton spinosum belongs to Acanthophyton' according to Dawson 1862
- 'Acanthopteris belongs to Plantae'
- 'Acanthopteris gothani belongs to Acanthopteris' according to Sze 1931
- 'Acanthorytidodiacrodium belongs to Acritarcha'
- 'Acanthozonodiacrodium belongs to Acritarcha'
- 'Acer giganteum belongs to Acer' according to Goeppert 1852
- 'Acer giganteum is recombined as Banisteriaecarpum giganteum' according to Kraeusel 1951
- 'Acerinium belongs to Plantae'
- 'Acerinium aegyptiacum belongs to Acerinium' according to Schenk 1888
- 'Acerinium aegyptiacum is recombined as Atherospermoxylon aegyptiacum' according to Kraeusel 1939
- 'Acerinium danubiale belongs to Acerinium' according to Unger 1842
- 'Aceriphyllum belongs to Angiospermae'
- 'Aceriphyllum aralioides belongs to Aceriphyllum' according to Fontaine 1889
- 'Acerites belongs to Angiospermae'
- 'Acerites ficifolia belongs to Acerites' according to Viviani 1833
- 'Aceroxylon belongs to Plantae'
- 'Achaenites belongs to Angiospermae'
- 'Achaenites ungeri belongs to Achaenites' according to Braun 1851
- 'Achlyites belongs to Phycomycetes'
- 'Achlyites penetrans belongs to Achlyites' according to Duncan 1898
- 'Acicularia paventina belongs to Acicularia' according to d'Archiac 1843
- 'Aciculella belongs to Dasycladaceae'
- 'Aciculella bacillum belongs to Aciculella' according to Pia 1927
- 'Aciphylla belongs to Plantae'
- 'Aciphylla pungens belongs to Aciphylla' according to Hector 1886
- 'Acitheca belongs to Marattiaceae'
- 'Acitheca polymorpha belongs to Acitheca' according to Brongniart 1879
- 'Aclistochara belongs to Characeae'
- 'Aclistochara bransoni belongs to Aclistochara' according to Peck 1937
- 'Aclistochara clivulata belongs to Aclistochara' according to Peck and Reker 1948
- 'Aclistochara clivulata is recombined as Nodosochara clivulata' according to Maedler 1955
- 'Aclistochara kimmeridgensis belongs to Aclistochara' according to Maedler 1953
- 'Aclistochara kimmeridgensis is recombined as Porochara kimmeridgensis' according to Maedler 1955
- 'Aclistochara latitruncata belongs to Aclistochara' according to Peck 1937
- 'Aclistochara latitruncata is recombined as Latochara latitruncata' according to Maedler 1955
- 'Aclistochara peckii belongs to Aclistochara' according to Rasky 1945
- 'Aclistochara peckii is recombined as Raskyaechara peckii' according to Horn af Rantzien 1959
- 'Acophyllum belongs to Cordaitaceae'
- 'Acophyllum wolzi belongs to Acophyllum' according to Zalessky 1929
- 'Acoropsis belongs to Araceae'
- 'Acoropsis minor belongs to Acoropsis' according to Conwentz 1886
- 'Acoxylon belongs to Plantae'
- 'Acoxylon suspectum belongs to Acoxylon' according to Velenovsky and Viniklar 1929
- 'Acozamites belongs to Cycadophyta'
- 'Acozamites elegans belongs to Acozamites' according to Zalessky 1936
- 'Acrangiophyllum belongs to Plantae'
- 'Acremonites belongs to Mucedinaceae'
- 'Acremonites succineus belongs to Acremonites' according to Caspary 1927
- 'Acrocarpus belongs to Polypodiopsida'
- 'Acrocarpus cuneatus belongs to Acrocarpus' according to Schenk 1867
- 'Acrocoila belongs to Plantae'
- 'Acrocoila anodonta belongs to Acrocoila' according to Mueller 1877
- 'Acroporella radoicici belongs to Acroporella' according to Praturlon 1964
- 'Acrostichides belongs to Pteridophyta'
- 'Acrostichides linnaefolium belongs to Acrostichides' according to Bunbury 1883
- 'Acrostichites belongs to Pteridophyta'
- 'Acrostichophyllum belongs to Pteridophyta'
- 'Acrostichophyllum cretaceum belongs to Acrostichophyllum' according to Velenovsky 1889
- 'Actinidia belongs to Theaceae'
- 'Actinidia crassisperma belongs to Actinidia' according to Chandler 1926
- 'Actinidia crassisperma is recombined as Hordwellia crassisperma' according to Chandler 1960
- 'Actinidiophyllum belongs to Angiospermae'
- 'Actinocarpus is a nomen nudum'
- 'Actinomycites belongs to Fungi'
- 'Actinomycodium belongs to Fungi'
- 'Actinomycodium floccidum belongs to Actinomycodium' according to Zalessky 1915
- 'Actinophycus belongs to Plantae'
- 'Actinophycus obrutschevi belongs to Actinophycus' according to Korde 1954
- 'Actinophyllum belongs to Plantae'
- 'Actinophyllum plicatum belongs to Actinophyllum' according to Phillips 1848
- 'Actinopodium belongs to Plantae'
- 'Actinopodium nathorstii belongs to Actinopodium' according to Høeg 1942
- 'Actinopteris belongs to Neuropteridae'
- 'Actinopteris bengalensis is recombined as Raniganjia bengalensis' according to Rigby 1963
- 'Actinopteris bengalensis belongs to Actinopteris' according to Feistmantel 1876
- 'Actinopteris peltata belongs to Actinopteris' according to Goeppert 1865
- 'Actinostrobites belongs to Plantae'
- 'Actinotheca belongs to Dinophyceae'
- 'Actinotheca aphroditae belongs to Actinotheca'
- 'Adelocercis is a nomen nudum'
- 'Adelocercis radobojana belongs to Adelocercis' according to Unger 1845
- 'Adelophyton belongs to Lycopodiophyta'
- 'Adelophyton jutieri belongs to Adelophyton' according to Renault 1900
- 'Adenanthemum belongs to Saxifragaceae'
- 'Adenanthemum iteoides belongs to Adenanthemum' according to Conwentz 1886
- 'Adiantes belongs to Plantae'
- 'Adiantides belongs to Plantae'
- 'Adiantites oblongifolium belongs to Adiantites' according to Brongniart 1836
- 'Adiantophyllum belongs to Ginkgophyta'
- 'Adiantophyllum reticulatum belongs to Adiantophyllum' according to Langeron 1899
- 'Aecidites belongs to Fungi'
- 'Aecidites stellatus belongs to Aecidites' according to Debey and Ettingshausen 1859
- 'Aenigmatophyllum belongs to Plantae'
- 'Aesculiphyllum belongs to Angiospermae'
- 'Aesculiphyllum majus belongs to Aesculiphyllum' according to Nathorst 1888
- 'Aesculophyllum belongs to Plantae'
- 'Aesculophyllum hastingsense belongs to Aesculophyllum' according to Dawson 1895
- 'Aetheotesta belongs to Plantae'
- 'Aetheotesta subglobosa belongs to Aetheotesta' according to Brongniart 1874
- 'Aethophyllum stipulare belongs to Aethophyllum' according to Brongniart 1828
- 'Afzelioxylon belongs to Plantae'
- 'Afzelioxylon kiliani belongs to Afzelioxylon' according to Louvet 1966
- 'Agalmatoaster belongs to Discoasteridae'
- 'Agalmatoaster septemradiatus belongs to Agalmatoaster' according to Klumpp 1953
- 'Agaricites belongs to Fungi'
- 'Agaricites wardianus belongs to Agaricites' according to Meschinelli 1892
- 'Agarites belongs to Plantae'
- 'Agarites fenestratus belongs to Agarites' according to Saporta 1890
- 'Agasopteris belongs to Pteridophyta'
- 'Agasopteris condomana belongs to Agasopteris' according to Zalessky 1937
- 'Agathopsis belongs to Plantae'
- 'Agathopsis ovalis belongs to Agathopsis' according to Prinada 1839
- 'Agathoxylon cordaianum belongs to Agathoxylon' according to Hartig 1848
- 'Agaurioxylon belongs to Ericaceae'
- 'Agavites belongs to Plantae'
- 'Agavites belongs to Plantae'
- 'Agavites araratica belongs to Agavites' according to Abich 1857
- 'Agavites prisca belongs to Agavites' according to Visiani 1869
- 'Agnophyton belongs to Plantae'
- 'Agnophyton aristatum belongs to Agnophyton' according to Massalongo 1850
- 'Agnotocaulon belongs to Plantae'
- 'Agnotocaulon mervillense belongs to Agnotocaulon' according to Fliche 1910
- 'Agrostidium belongs to Plantae'
- 'Agrostidium priscum belongs to Agrostidium' according to Massalongo 1853
- 'Aherniaephyllum belongs to Flacourtiaceae'
- 'Aherniaephyllum kraeuseli belongs to Aherniaephyllum' according to Rasky 1960
- 'Ailanthophyllum belongs to Plantae'
- 'Ailanthophyllum incertum belongs to Ailanthophyllum' according to Dawson 1890
- 'Ailanthoxylon belongs to Simarubaceae'
- 'Ailanthoxylon indicum belongs to Ailanthoxylon' according to Prakash 1959
- 'Ailanthoxylon scantiporosum belongs to Ailanthoxylon' according to Ramanujam 1960
- 'Aiora belongs to Acritarcha'
- 'Aipteris speciosa belongs to Aipteris' according to Zalessky 1939
- 'Ajakmalajsoria belongs to Plantae'
- 'Ajakmalajsoria rotunda belongs to Ajakmalajsoria' according to Korde 1957
- 'Ajuginucula belongs to Labiatae'
- 'Ajuginucula smithii belongs to Ajuginucula' according to Reid and Chandler 1926
- 'Akdalaphyton belongs to Plantae'
- 'Akdalaphyton caradocki belongs to Akdalaphyton' according to Senkevich 1963
- 'Alangiophyllum belongs to Cornaceae'
- 'Alangiophyllum petiocaulum belongs to Alangiophyllum' according to Potbury 1935
- 'Alasites belongs to Plantae'
- 'Alatampulla belongs to Plantae'
- 'Alatampulla bartlettii belongs to Alatampulla' according to Miner 1935
- 'Alatospermum belongs to Lythraceae'
- 'Albertia latifolia belongs to Albertia' according to Schimper 1838
- 'Albizzioxylon belongs to Leguminosae'
- 'Albizzioxylon hyrcanicum belongs to Albizzioxylon' according to Nikitin 1935
- 'Albizzioxylon sahnii belongs to Albizzioxylon' according to Ramanujam 1960
- 'Albucastrum belongs to Liliaceae'
- 'Albucastrum perianthiodieum belongs to Albucastrum' according to Massalongo 1859
- 'Alchorneites belongs to Euphorbiaceae'
- 'Alchorneites mallotoides belongs to Alchorneites' according to Langeron 1899
- 'Alcicornopteris belongs to Pteridophyta'
- 'Alcicornopteris convoluta belongs to Alcicornopteris' according to Kidston 1887
- 'Alcyonidiopsis belongs to Plantae'
- 'Alcyonidiopsis longobardiae belongs to Alcyonidiopsis' according to Massalongo 1856
- 'Alcyonium belongs to Plantae'
- 'Aldania belongs to Cycadophyta'
- 'Aldania auriculata belongs to Aldania' according to Samylina 1956
- 'Aldanophyton belongs to Plantae'
- 'Aldanophyton antiquissimum belongs to Aldanophyton' according to Kryshtofovich 1953
- 'Aldwickia belongs to Myrtaceae'
- 'Aldwickia venablesi belongs to Aldwickia' according to Chandler 1961
- 'Alectorurus belongs to Plantae'
- 'Alethopteris flexuosa belongs to Alethopteris' according to Goeppert 1836
- 'Alethopteris flexuosa is recombined as Desmophlebis flexuosa' according to Brongniart 1849
- 'Alethopteris holdeni belongs to Alethopteris' according to Andrews 1875
- 'Alethopteris holdeni is recombined as Protoblechnum holdeni' according to Lesquereux 1880
- 'Aleuriteophyllum belongs to Euphorbiaceae'
- 'Aleuriteophyllum nemejci belongs to Aleuriteophyllum' according to Rasky 1965
- 'Aleurites miocenica belongs to Aleurites' according to Watari 1956
- 'Aleurites miocenica is recombined as Aleuritoxylon miocenicum' according to Mädel 1962
- 'Aleuritoxylon belongs to Euphorbiaceae'
- 'Algacites belongs to Plantae'
- 'Algacites erucaeformis is recombined as Mastocarpites erucaeformis' according to Trevisan 1856
- 'Algacites erucaeformis belongs to Algacites' according to Sternberg 1833
- 'Algacites filicoides belongs to Algacites' according to Schlotheim 1822
- 'Algacites granulatus belongs to Algacites' according to Schlotheim 1822
- 'Algacites granulatus is recombined as Phymatoderma granulatum' according to Brongniart 1849
- 'Algacites intertextus belongs to Algacites' according to Sternberg 1820
- 'Algacites intertextus is recombined as Rhizomorphites intertextus' according to Trevisan 1856
- 'Algites cranii belongs to Algites' according to Kidston and Long 1921
- 'Algites cranii is recombined as Palaeonitella cranii' according to Pia 1927
- 'Algites valdensis belongs to Algites' according to Seward 1894
- 'Alismacites belongs to Alismaceae'
- 'Alismacites lancifolius belongs to Alismacites' according to Saporta 1862
- 'Alismaphyllites belongs to Alismaceae'
- 'Alismaphyllites crassifolium belongs to Alismaphyllites' according to Knowlton 1917
- 'Alismaphyllum belongs to Alismaceae'
- 'Allantodiopsis belongs to Plantae'
- 'Allicospermum belongs to Gymnospermophyta'
- 'Allicospermum xystum belongs to Allicospermum' according to Harris 1935
- 'Alloasterophyllites belongs to Plantae'
- 'Alloiopteris belongs to Plantae'
- 'Alloiopteris quercifolia belongs to Alloiopteris' according to Goeppert 1897
- 'Allonilssonia is a nomen dubium'
- 'Alloxylon belongs to Coniferophyta'
- 'Alloxylon primordiale belongs to Alloxylon' according to Zalessky 1927
- 'Almargemia belongs to Cycadophyta'
- 'Almargemia dentata belongs to Almargemia' according to Heer 1933
- 'Alniphyllum is a nomen nudum'
- 'Alnites belongs to Plantae'
- 'Alnites belongs to Betulaceae'
- 'Alnites latifolia belongs to Alnites' according to Deane 1902
- 'Alnites reussii belongs to Alnites' according to Ettingshausen 1853
- 'Alnites reussii is recombined as Alnophyllum reussii' according to Staub 1887
- 'Alnophyllum belongs to Betulaceae'
- 'Alnoxylon belongs to Plantae'
- 'Alnoxylon vasculosum belongs to Alnoxylon' according to Felix 1884
- 'Aloites belongs to Plantae'
- 'Aloites italica belongs to Aloites' according to Visiani 1869
- 'Alsinaceae is a subjective synonym of Caryophyllaceae'
- 'Alsinites belongs to Alsinaceae'
- 'Alsinites revelatus belongs to Alsinites' according to Cockerell 1925
- 'Alsophilina belongs to Plantae'
- 'Alsophilina kauniciana belongs to Alsophilina' according to Dormitzer 1853
- 'Alsophilites belongs to Cyatheaceae'
- 'Alsophilites polonica belongs to Alsophilites' according to Raciborski 1927
- 'Amadokia belongs to Plantae'
- 'Amadokia tchirkovae belongs to Amadokia' according to Zalessky 1931
- 'Amansites belongs to Graptolithina'
- 'Amaryllites belongs to Plantae'
- 'Amaryllites wherryi belongs to Amaryllites' according to Bock 1962
- 'Ambaroxylon belongs to Saxifragales'
- 'Ambaroxylon lecointrae belongs to Ambaroxylon' according to Houlbert 1910
- 'Amberites belongs to Plantae'
- 'Amblyochara begudiana belongs to Amblyochara' according to Grambast 1962
- 'Amdrupia belongs to Gymnospermophyta'
- 'Amdrupia stenodonta belongs to Amdrupia' according to Harris 1932
- 'Ameghinoites belongs to Angiospermae'
- 'Ameghinoites desiderata belongs to Ameghinoites' according to Spegazzini 1924
- 'Amesoneuron belongs to Arecaceae'
- 'Amesoneuron noeggerathiae belongs to Amesoneuron' according to Goeppert 1852
- 'Amgaella belongs to Plantae'
- 'Amgaella amganensis belongs to Amgaella' according to Korde 1957
- 'Amganella belongs to Plantae'
- 'Amganella glabra belongs to Amganella' according to Krasnopeeva 1959
- 'Amicus belongs to Dasycladaceae'
- 'Amicus fortunatus belongs to Amicus' according to Maslov 1956
- 'Ammatophyllum belongs to Plantae'
- 'Ammatophyllum uninervium belongs to Ammatophyllum' according to Zalessky 1936
- 'Ammatopsis belongs to Coniferales'
- 'Ammatopsis mira belongs to Ammatopsis' according to Zalessky 1937
- 'Amomocarpum belongs to Plantae'
- 'Amomocarpum affine belongs to Amomocarpum' according to Sahni 1938
- 'Amomocarpum depressum belongs to Amomocarpum' according to Brongniart 1828
- 'Amomophyllum belongs to Zingiberaceae'
- 'Amomophyllum tenua belongs to Amomophyllum' according to Watelet 1866
- 'Ampelitocystis belongs to Problematica'
- 'Ampelitocystis feuguerollensis belongs to Ampelitocystis' according to Deunff 1957
- 'Ampelocissites belongs to Vitaceae'
- 'Ampelocissites lytlensis belongs to Ampelocissites' according to Berry 1929
- 'Ampelophyllites belongs to Vitaceae'
- 'Ampelophyllum belongs to Vitaceae'
- 'Ampelophyllum belongs to Plantae'
- 'Ampelophyllum attenuatum belongs to Ampelophyllum' according to Lesquereux 1876
- 'Ampelophyllum firmus belongs to Ampelophyllum' according to Lesquereux 1876
- 'Ampelophyllum noeticum belongs to Ampelophyllum' according to Massalongo 1859
- 'Ampeloxylon belongs to Plantae'
- 'Ampeloxylon cineritarum belongs to Ampeloxylon' according to Fliche 1899
- 'Amphibennetites belongs to Cycadophyta'
- 'Amphibennetites bleicheri belongs to Amphibennetites' according to Fliche 1896
- 'Amphibryophyllum is a nomen nudum'
- 'Amphidiadema belongs to Dinophyceae'
- 'Amphidoxodendron belongs to Lycopodophyta'
- 'Amphidoxodendron dichotomum belongs to Amphidoxodendron' according to Grierson and Banks 1963
- 'Amphiephedra belongs to Ephedrales'
- 'Amphiephedra rhamnoides belongs to Amphiephedra' according to Miki 1964
- 'Amphilithopyxis belongs to Chrysomonads'
- 'Amphilithopyxis aenigmatica belongs to Amphilithopyxis' according to Deflandre 1932
- 'Amphitoa belongs to Plantae'
- 'Amphitoites belongs to Plantae'
- 'Amphitoites parisiensis belongs to Amphitoites' according to Desmarest 1822
- 'Amphoridium belongs to Problematica'
- 'Amphoridium baldense belongs to Amphoridium' according to Massalongo 1852
- 'Amphorispermum belongs to Caytoniales'
- 'Amphorispermum ellipticum belongs to Amphorispermum' according to Harris 1932
- 'Amuriella belongs to Cycadales'
- 'Amuriella extra belongs to Amuriella' according to Prinada 1956
- 'Amydrostrobus belongs to Pinales'
- 'Amydrostrobus groenlandicus belongs to Amydrostrobus' according to Harris 1935
- 'Amyelon belongs to Cordaitales'
- 'Amyelon radicans belongs to Amyelon' according to Williamson 1874
- 'Amyoxylon belongs to Plantae'
- 'Amyoxylon huttonii belongs to Amyoxylon' according to Hartig 1848
- 'Amyridoxylon belongs to Rutaceae'
- 'Amyridoxylon ordinatum belongs to Amyridoxylon' according to Kruse 1954
- 'Anabacaulus belongs to Plantae'
- 'Anabacaulus duplicatus belongs to Anabacaulus' according to Emmons 1857
- 'Anabara belongs to Plantae'
- 'Anabara plana belongs to Anabara' according to Vologdin et al. 1937
- 'Anabathra belongs to Plantae'
- 'Anabathra pulcherrima belongs to Anabathra' according to Witham 1833
- 'Anacardiophyllum belongs to Anacardiaceae'
- 'Anacardiophyllum dubium belongs to Anacardiophyllum' according to Ettingshausen 1870
- 'Anacardioxylon belongs to Plantae'
- 'Anacardioxylon mollii belongs to Anacardioxylon' according to Kraeusel 1922
- 'Anacardioxylon mollii is recombined as Sumatroxylon mollii' according to Berger 1923
- 'Anacardioxylon spondiaeforme belongs to Anacardioxylon' according to Felix 1882
- 'Anacardites belongs to Anacardiaceae'
- 'Anacardites alnifolius belongs to Anacardites' according to Saporta 1862
- 'Anacardites spectabilis belongs to Anacardites' according to Saporta 1861
- 'Anachoropteris belongs to Plantae'
- 'Anachoropteris pulchra belongs to Anachoropteris' according to Corda 1845
- 'Anarthrocanna belongs to Plantae'
- 'Anarthrocanna deliquescens belongs to Anarthrocanna' according to Goeppert 1845
- 'Anastachys belongs to Sphenophyllales'
- 'Anastomopteris belongs to Pteridophyta'
- 'Anastomopteris azdavayi belongs to Anastomopteris' according to Wagner 1958
- 'Anatolipora belongs to Dasycladaceae'
- 'Anatolipora carbonica belongs to Anatolipora' according to Konishi 1956
- 'Anchicodium funile belongs to Anchicodium' according to Johnson 1946
- 'Ancistrophyllum belongs to Plantae'
- 'Ancistrophyllum stigmariaeforme belongs to Ancistrophyllum' according to Goeppert 1841
- 'Ancoraecarpon belongs to Angiospermae'
- 'Ancoraecarpon cristatum belongs to Ancoraecarpon' according to Velenovsky and Viniklar 1931
- 'Andriania belongs to Plantae'
- 'Andriania baruthina belongs to Andriania' according to Braun 1843
- 'Andriania polycarpa belongs to Andriania' according to Braun 1840
- 'Andriania polycarpa is a nomen nudum'
- 'Androlepis belongs to Cycadophyta'
- 'Androlepis ambigua belongs to Androlepis' according to Nathorst 1902
- 'Andromedites belongs to Ericaceae'
- 'Andromedites paradoxus belongs to Andromedites' according to Ettingshausen 1851
- 'Androphyllum belongs to Plantae'
- 'Androphyllum teschekardense belongs to Androphyllum' according to Zalessky 1937
- 'Androstachys is an objective synonym of Schizostachys'
- 'Androstachys frondosus belongs to Androstachys' according to Grand'Eury 1877
- 'Androstachys frondosus is an objective synonym of Schizostachys frondosus'
- 'Androvettia belongs to Coniferophyta'
- 'Androvettia statenensis belongs to Androvettia' according to Hollick and Jeffrey 1909
- 'Andrusporella belongs to Dasycladaceae'
- 'Andrusporella fusani belongs to Andrusporella' according to Bystricky 1962
- 'Aneimidium belongs to Pteridophyta'
- 'Aneimidium mantelli belongs to Aneimidium' according to Dunker 1869
- 'Aneimites belongs to Peltaspermopsida'
- 'Aneimites acadica belongs to Aneimites' according to Dawson 1860
- 'Aneurophyton belongs to Progymnospermopsida'
- 'Aneurophyton germanicum belongs to Aneurophyton' according to Krausel and Weyland 1923
- 'Angaridium belongs to Ginkgophyta'
- 'Angaridium bardense belongs to Angaridium' according to Zalessky 1933
- 'Angariella belongs to Plantae'
- 'Angariella angustifolia belongs to Angariella' according to Heer 1962
- 'Angarocarpus fusiformis belongs to Angarocarpus' according to Tchirkova 1955
- 'Angarodendron belongs to Lycopodophyta'
- 'Angarodendron obrutchevi belongs to Angarodendron' according to Zalessky 1918
- 'Angarolaminariopsis belongs to Plantae'
- 'Angarolaminariopsis zinovae belongs to Angarolaminariopsis' according to Ananiev 1956
- 'Angaropteridium cardiopteroides belongs to Angaropteridium' according to Schmalhausen 1932
- 'Angaropteris belongs to Pteridospermophyta'
- 'Angaropteris glossopteroides belongs to Angaropteris' according to Schmalhausen 1936
- 'Angarotheca belongs to Apocalamitaceae'
- 'Angarotheca originalis belongs to Angarotheca' according to Chachlov 1948
- 'Angiodendron belongs to Plantae'
- 'Angiodendron orientale belongs to Angiodendron' according to Eichwald 1860
- 'Angiopteridium is replaced by Marattiopsis' according to Schimper 1874
- 'Angiopteridium muensteri is recombined as Marattiopsis muensteri' according to Schimper 1874
- 'Angiopteridium muensteri belongs to Angiopteridium' according to Goeppert 1869
- 'Angiospermophyton belongs to Medullosales'
- 'Angiospermophyton americanum belongs to Angiospermophyton' according to Hoskins 1923
- 'Angiotheca belongs to Plantae'
- 'Angiotheca angiotheca belongs to Angiotheca' according to Grand'Eury 1879
- 'Angularia belongs to Acritarcha'
- 'Angularia viridula belongs to Angularia' according to Samojlovic 1961
- 'Angulocellularia belongs to Rhodophyceae'
- 'Angulocellularia anisotoma belongs to Angulocellularia' according to Vologdin 1962
- 'Angusticellularia anisotoma belongs to Angusticellularia' according to Vologdin 1962
- 'Animikiea belongs to Problematica'
- 'Anisophyllum belongs to Angiospermae'
- 'Anisopteroxylon belongs to Dipterocarpaceae'
- 'Anisopteroxylon bengalensis belongs to Anisopteroxylon' according to Ghosh and Kazmi 1958
- 'Ankyropteris belongs to Coenopteridales'
- 'Ankyropteris australis belongs to Ankyropteris' according to Osborn 1919
- 'Ankyropteris australis is recombined as Austroclepsis australis' according to Sahni 1932
- 'Anonaceae is a misspelling of Annonaceae'
- 'Annonoxylon belongs to Plantae'
- 'Annonoxylon striatum belongs to Annonoxylon' according to Boureau 1950
- 'Annularia laxa is recombined as Pseudoannularia laxa' according to Grand'Eury 1877
- 'Annularia laxa belongs to Annularia' according to Dawson 1871
- 'Annularia spinulosa belongs to Annularia' according to Sternberg 1821
- 'Annulariopsis inopinata belongs to Annulariopsis' according to Zeiller 1903
- 'Annularites belongs to Equisetales'
- 'Annularites ensifolius belongs to Annularites' according to Halle 1927
- 'Annulina belongs to Equisetales'
- 'Anoectomeria belongs to Nymphaeaceae'
- 'Anoectomeria brongniartii belongs to Anoectomeria' according to Saporta 1865
- 'Anogeissusoxylon belongs to Combretaceae'
- 'Anogeissusoxylon indicum belongs to Anogeissusoxylon' according to Navale 1964
- 'Anogeissuxylon belongs to Combretaceae'
- 'Anogeissuxylon bussoni belongs to Anogeissuxylon' according to Louvet 1965
- 'Anomalochara belongs to Plantae'
- 'Anomalochara polymorpha belongs to Anomalochara' according to Maslov 1961
- 'Anomalofilicites belongs to Pteridophyta'
- 'Anomalofilicites monstrosus belongs to Anomalofilicites' according to Hollick 1916
- 'Anomalophycus belongs to Rhodophyta'
- 'Anomalophycus compactus belongs to Anomalophycus' according to Fenton and Fenton 1937
- 'Anomaloxylon belongs to Plantae'
- 'Anomaloxylon belongs to Coniferophyta'
- 'Anomaloxylon magnoradiatum belongs to Anomaloxylon' according to Gothan 1910
- 'Anomaloxylon vicentinum belongs to Anomaloxylon' according to Felix 1887
- 'Anomaspis belongs to Coniferophyta'
- 'Anomaspis tuberculata belongs to Anomaspis' according to Hollick and Jeffrey 1909
- 'Anomophyllites belongs to Palmae'
- 'Anomophyllites tricarinatus belongs to Anomophyllites' according to Watelet 1866
- 'Anomopteris schlechtendali belongs to Anomopteris' according to Eichwald 1842
- 'Anomopteris schlechtendali is recombined as Thamnopteris schlechtendali' according to Brongniart 1849
- 'Anomorrhoea belongs to Osmundaceae'
- 'Anomorrhoea fischeri belongs to Anomorrhoea' according to Eichwald 1844
- 'Anonaspermum belongs to Annonaceae'
- 'Anonaspermum reidi belongs to Anonaspermum' according to Ball 1931
- 'Anotopteris belongs to Pteridophyta'
- 'Anotopteris distans belongs to Anotopteris' according to Presl 1869
- 'Antarcticoxylon belongs to Gymnospermophyta'
- 'Antarcticoxylon priestleyi belongs to Antarcticoxylon' according to Seward 1914
- 'Antevsia belongs to Pteridospermophyta'
- 'Anthatractus belongs to Dinophyceae'
- 'Anthatractus insolitus belongs to Anthatractus' according to Deunff 1954
- 'Antherangiopsis belongs to Cycadophyta'
- 'Antherangiopsis rediviva belongs to Antherangiopsis' according to Nathorst 1902
- 'Anthicocladus belongs to Pteridospermophyta'
- 'Anthicocladus fimbriatus belongs to Anthicocladus' according to Zalessky 1937
- 'Anthites belongs to Angiospermae'
- 'Anthites gaudini belongs to Anthites' according to Heer 1874
- 'Anthocarpus is a nomen nudum'
- 'Anthocephale belongs to Plantae'
- 'Anthocephale bohemica belongs to Anthocephale' according to Bayer 1893
- 'Anthodiopsis belongs to Plantae'
- 'Anthodiopsis beinertiana belongs to Anthodiopsis' according to Goeppert 1864
- 'Anthodium belongs to Coniferales'
- 'Anthodium involucratum belongs to Anthodium' according to Velenovsky and Viniklar 1931
- 'Antholithes liliacea belongs to Antholithes' according to Brongniart 1822
- 'Antholithus arberi belongs to Antholithus' according to Thomas 1925
- 'Antholithus arberi is recombined as Caytonanthus arberi' according to Harris 1937
- 'Antholithus zeilleri belongs to Antholithus' according to Nathorst 1908
- 'Antholithus zeilleri is recombined as Antevsia zeilleri' according to Harris 1937
- 'Anthophycus belongs to Plantae'
- 'Anthophycus dechenianus belongs to Anthophycus' according to Goeppert 1887
- 'Anthotypolithes belongs to Ranunculales'
- 'Anthotypolithes ranunculiformis belongs to Anthotypolithes' according to Schlotheim 1820
- 'Anthracochondrus belongs to Plantae'
- 'Anthracochondrus nyranensis belongs to Anthracochondrus' according to Kusta 1898
- 'Anthracomyces belongs to Fungi'
- 'Anthracomyces cannellensis belongs to Anthracomyces' according to Renault 1898
- 'Anthracoporellopsis belongs to Plantae'
- 'Anthracoporellopsis machaevii belongs to Anthracoporellopsis' according to Maslov 1956
- 'Anthrophyopsis nilssoni belongs to Anthrophyopsis' according to Nathorst 1878
- 'Anthuriophyllum belongs to Araceae'
- 'Anthuriophyllum spectabile belongs to Anthuriophyllum' according to Weyland 1957
- 'Antiquus belongs to Cyanophyta'
- 'Antiquus cusarandicus belongs to Antiquus' according to Butin 1959
- 'Antrophyopteris belongs to Plantae'
- 'Antrophyopteris hamiltonensis belongs to Antrophyopteris' according to Hollick 1956
- 'Antrosphaera belongs to Plantae'
- 'Antrosphaera calloviensis belongs to Antrosphaera' according to Sarjeant 1961
- 'Antweileria belongs to Juglandaceae'
- 'Antweileria caryoides belongs to Antweileria' according to Kirchheimer 1951
- 'Apachea belongs to Dipteridaceae'
- 'Apachea arizonica belongs to Apachea' according to Daugherty 1941
- 'Apaloxylon belongs to Cordaitales'
- 'Apaloxylon rocheri belongs to Apaloxylon' according to Renault 1892
- 'Apeibopsis belongs to Tiliaceae'
- 'Apeibopsis gaudini belongs to Apeibopsis' according to Heer 1859
- 'Aphanocapsites belongs to Chroococcaceae'
- 'Aphanocapsites granulosus belongs to Aphanocapsites' according to Maslov 1956
- 'Aphlebia belongs to Plantae'
- 'Aphlebiocarpus belongs to Pteridophyta'
- 'Aphlebiocarpus schutzei belongs to Aphlebiocarpus' according to Stur 1877
- 'Aphlebiopteris belongs to Plantae'
- 'Aphlebiopteris boegendorfiana belongs to Aphlebiopteris' according to Gothan and Zimmerman 1932
- 'Aphloioxylon belongs to Flacourtiaceae'
- 'Aphloioxylon groenlandicum belongs to Aphloioxylon' according to Mathiesen 1961
- 'Aphralysia carbonaria belongs to Aphralysia' according to Garwood 1914
- 'Aphyllopteris belongs to Plantae'
- 'Aphyllopteris delawarensis belongs to Aphyllopteris' according to Arnold 1939
- 'Aphyllostachys belongs to Plantae'
- 'Aphyllostachys jugleriana belongs to Aphyllostachys' according to Goeppert 1865
- 'Aphyllum belongs to Lycopodophyta'
- 'Aphyllum cristatum belongs to Aphyllum' according to Artis 1825
- 'Apidium kraeusei belongs to Apidium' according to Kiesow 1896
- 'Aplophlebis belongs to Plantae'
- 'Aplophlebis arborescens belongs to Aplophlebis' according to Schlotheim 1857
- 'Apludophyton is a nomen nudum'
- 'Apocalamitaceae belongs to Sphenophyta'
- 'Apocalamites belongs to Plantae'
- 'Apocynocarpum belongs to Apocynaceae'
- 'Apocynocarpum sulcatum belongs to Apocynocarpum' according to Ettingshausen 1886
- 'Apocynophyllum belongs to Apocynaceae'
- 'Apocynophyllum lanceolatum belongs to Apocynophyllum' according to Unger 1850
- 'Apocynophyllum seyfriedii belongs to Apocynophyllum' according to Braun 1850
- 'Apocynospermum belongs to Apocynaceae'
- 'Apocynospermum striatum belongs to Apocynospermum' according to Reid and Chandler 1926
- 'Aporoxylon belongs to Cordaitales'
- 'Aporoxylon primigenium belongs to Aporoxylon' according to Unger 1856
- 'Apotropteris belongs to Coenopteridales'
- 'Apotropteris minuta belongs to Apotropteris' according to Morgan and Delevoryas 1954
- 'Applanopsis belongs to Acritarcha'
- 'Applanopsis lenticularis belongs to Applanopsis' according to Döring 1961
- 'Aptea belongs to Dinophyceae'
- 'Apteodinium belongs to Dinophyceae'
- 'Apterostrobus belongs to Coniferales'
- 'Apterostrobus cedroides belongs to Apterostrobus' according to Gothan and Nagel 1921
- 'Aptiana belongs to Plantae'
- 'Aptiana radiata belongs to Aptiana' according to Stopes 1912
- 'Arabicodium belongs to Codiaceae'
- 'Arabicodium aegagrapiloides belongs to Arabicodium' according to Elliot 1957
- 'Araceaeites belongs to Araceae'
- 'Araceophyllum belongs to Araceae'
- 'Araceophyllum engleri belongs to Araceophyllum' according to Kraeusel 1929
- 'Arachnoxylon belongs to Psilophytales'
- 'Arachnoxylon kopfi belongs to Arachnoxylon' according to Arnold 1938
- 'Aracispermum belongs to Araceae'
- 'Aracispermum hippuriformis belongs to Aracispermum' according to Nikitin 1965
- 'Aracistrobus belongs to Plantae'
- 'Araeis belongs to Plantae'
- 'Araliacea is a nomen nudum'
- 'Araliacites belongs to Araliaceae'
- 'Araliacites cordatus belongs to Araliacites' according to Saporta 1865
- 'Araliaecarpum belongs to Araliaceae'
- 'Araliaecarpum tertiarium belongs to Araliaecarpum' according to Menzel 1913
- 'Araliaephyllum belongs to Araliaceae'
- 'Araliaephyllum obtusilobum belongs to Araliaephyllum' according to Fontaine 1889
- 'Aralianthea belongs to Araliaceae'
- 'Aralianthea brongniarti belongs to Aralianthea' according to Massalongo 1893
- 'Aralinium belongs to Plantae'
- 'Aralinium excellens belongs to Aralinium' according to Platen 1908
- 'Araliophyllum belongs to Angiospermae'
- 'Araliophyllum dubium belongs to Araliophyllum' according to Ettingshausen 1868
- 'Araliopsis belongs to Araliaceae'
- 'Araliopsoides belongs to Araliaceae'
- 'Araliphyllum belongs to Angiospermae'
- 'Araliphyllum raumanni belongs to Araliphyllum' according to Nathorst 1888
- 'Aralites is a nomen nudum'
- 'Aranetzia belongs to Sphenopteridae'
- 'Aranetzia splendens belongs to Aranetzia' according to Zalessky 1934
- 'Araucaria hespera belongs to Araucaria' according to Wieland 1908
- 'Araucaria hespera is recombined as Arthmiocarpus hesperus' according to Delevoryas 1964
- 'Araucaria sternbergii belongs to Araucaria' according to Corda 1842
- 'Araucaria sternbergii is recombined as Doliostrobus sternbergi' according to Marion 1884
- 'Araucariocaulon belongs to Pinopsida'
- 'Araucariocaulon breveradiatum belongs to Araucariocaulon' according to Lignier 1907
- 'Araucariophloios belongs to Pinopsida'
- 'Araucariophloios breveradiatum belongs to Araucariophloios' according to Lignier 1907
- 'Araucariopitys belongs to Araucariaceae'
- 'Araucariopitys americana belongs to Araucariopitys' according to Jeffrey 1907
- 'Araucariopsis belongs to Plantae'
- 'Araucariopsis macractis belongs to Araucariopsis' according to Caspary 1888
- 'Araucariorhiza belongs to Araucariaceae'
- 'Araucariorhiza joae belongs to Araucariorhiza' according to Daugherty 1963
- 'Araucariostrobus belongs to Plantae'
- 'Araucariostrobus mandlii belongs to Araucariostrobus' according to Krasser 1921
- 'Araucarites belongs to Coniferales'
- 'Araucarites goepperti belongs to Araucarites' according to Presl 1838
- 'Araucarites oldhami belongs to Araucarites' according to Zeiller 1902
- 'Araucarites oldhami is recombined as Morania oldhami' according to Seward and Sahni 1920
- 'Araucarites oldhami is recombined as Moranocladus oldhami' according to Seward and Sahni 1926
- 'Araucarites sydneyensis belongs to Araucarites' according to Walkom 1925
- 'Araucarites sydneyensis is recombined as Cylostrobus sydneyensis' according to Helby and Martin 1965
- 'Araucarites tchihatcheffianus belongs to Araucarites' according to Goeppert 1850
- 'Araucarites tchihatcheffianus is recombined as Mesopitys tchihatcheffianus' according to Zalessky 1911
- 'Arberia belongs to Plantae'
- 'Arberia minasica belongs to Arberia' according to White 1908
- 'Arberiella belongs to Plantae'
- 'Arberiella africana belongs to Arberiella' according to Pant and Nautiyal 1960
- 'Arbutites belongs to Ericaceae'
- 'Arbutites euri belongs to Arbutites' according to Ettingshausen 1868
- 'Arcellites disciformis belongs to Arcellites' according to Miner 1935
- 'Archaeocalamites belongs to Plantae'
- 'Archaeocalamites radiatus belongs to Archaeocalamites' according to Brongniart 1875
- 'Archaeocladus belongs to Plantae'
- 'Archaeocladus seriatus belongs to Archaeocladus' according to Endo 1956
- 'Archaeodiscina belongs to Acritarcha'
- 'Archaeodiscina granulata belongs to Archaeodiscina' according to Naumova 1960
- 'Archaeofavosina belongs to Acritarcha'
- 'Archaeofavosina simplex belongs to Archaeofavosina' according to Naumova 1960
- 'Archaeohystrichosphaeridium is a nomen nudum'
- 'Archaeolithophyllum belongs to Corallinaceae'
- 'Archaeolithophyllum missouriensis belongs to Archaeolithophyllum' according to Johnson 1956
- 'Archaeolithothamnium belongs to Corallinaceae'
- 'Archaeomnium belongs to Mniaceae'
- 'Archaeomnium patens belongs to Archaeomnium' according to Britton 1926
- 'Archaeomonadopsis belongs to Chrysomonads'
- 'Archaeomonadopsis lagenula belongs to Archaeomonadopsis' according to Deflandre 1938
- 'Archaeoperisaccus belongs to Acritarcha'
- 'Archaeoperisaccus balticus belongs to Archaeoperisaccus' according to Naumova 1960
- 'Archaeopertusina belongs to Acritarcha'
- 'Archaeopertusina atava belongs to Archaeopertusina' according to Naumova 1960
- 'Archaeophyton belongs to Plantae'
- 'Archaeophyton newberryanum belongs to Archaeophyton' according to Britton 1888
- 'Archaeopitys belongs to Cordaitales'
- 'Archaeopitys eastmanii belongs to Archaeopitys' according to Scott and Jeffrey 1914
- 'Archaeopodocarpus belongs to Plantae'
- 'Archaeopodocarpus germanicus belongs to Archaeopodocarpus' according to Weigelt 1930
- 'Archaeopteridium belongs to Archaeopteridopsida'
- 'Archaeopteridium tschermaki belongs to Archaeopteridium' according to Stur 1923
- 'Archaeorestis belongs to Problematica'
- 'Archaeorrhiza belongs to Plantae'
- 'Archaeorrhiza tuberosa belongs to Archaeorrhiza' according to Torell 1869
- 'Archaeosigillaria belongs to Sigillariaceae'
- 'Archaeosigillariopsis belongs to Lycopodophyta'
- 'Archaeosigillariopsis serotina belongs to Archaeosigillariopsis' according to Gothan 1928
- 'Archaeothrix belongs to Cyanobacteria'
- 'Archaeothrix oscillatoriformis belongs to Archaeothrix' according to Kidston and Lang 1921
- 'Archaeoxylon belongs to Pteridophyta'
- 'Archaeoxylon krasseri belongs to Archaeoxylon' according to Kraeusel 1924
- 'Archaeozoon belongs to Problematica'
- 'Archaeozoon acadiense belongs to Archaeozoon' according to Matthew 1890
- 'Archaeozostera belongs to Zosteraceae'
- 'Archagaricon belongs to Fungi'
- 'Archagaricon bulbosum belongs to Archagaricon' according to Hancock and Atthey 1869
- 'Archangelskya belongs to Plantae'
- 'Archangelskya protoloxoma belongs to Archangelskya' according to Kurtz 1964
- 'Archihicoria belongs to Magnoliopsida'
- 'Archihicoria siouxensis belongs to Archihicoria' according to Barbour 1898
- 'Arctobaiera belongs to Ginkgophyta'
- 'Arctobaiera flettii belongs to Arctobaiera' according to Florin 1936
- 'Arctodendron belongs to Plantae'
- 'Arctopodium belongs to Plantae'
- 'Arctopodium insigne belongs to Arctopodium' according to Unger 1856
- 'Arctostaphyloides belongs to Ericaceae'
- 'Arctostaphyloides globula belongs to Arctostaphyloides' according to Menzel 1936
- 'Arctoxylon belongs to Coniferophyta'
- 'Arctoxylon magnoradiatum belongs to Arctoxylon' according to Gothan 1949
- 'Arcyopteris belongs to Pteridophyta'
- 'Arcyopteris asiatica belongs to Arcyopteris' according to Zalessky 1936
- 'Ardisiophyllum belongs to Myrsinaceae'
- 'Arecites belongs to Araceae'
- 'Arecites trabucci belongs to Arecites' according to Squinabol 1892
- 'Arecopsis belongs to Plantae'
- 'Arecopsis communis belongs to Arecopsis' according to Fritel 1927
- 'Aremoricanium belongs to Dinophyceae'
- 'Aremoricanium rigaudae belongs to Aremoricanium' according to Deunff 1955
- 'Areoligera belongs to Dinophyceae'
- 'Argophyllites belongs to Magnoliopsida'
- 'Argophyllites levis belongs to Argophyllites' according to Deane 1902
- 'Arisaemites belongs to Araceae'
- 'Aristolochiaephyllum belongs to Plantae'
- 'Aristolochiaephyllum crassinerve belongs to Aristolochiaephyllum' according to Fontaine 1889
- 'Aristolochites belongs to Plantae'
- 'Aristolochites dentata belongs to Aristolochites' according to Heer 1866
- 'Aristolochopsis belongs to Plantae'
- 'Aristophycos belongs to Plantae'
- 'Aristophycos agardhianus belongs to Aristophycos' according to Massalongo 1858
- 'Aristophycus belongs to Problematica'
- 'Aristophycus ramosum belongs to Aristophycus' according to Miller and Dyer 1878
- 'Arnoldella belongs to Pityeae'
- 'Arnoldella minuta belongs to Arnoldella' according to Read 1936
- 'Aroides belongs to Plantae'
- 'Aroides crassipatha belongs to Aroides' according to Kutorga 1838
- 'Aronites belongs to Araceae'
- 'Aronites dubius belongs to Aronites' according to Heer 1855
- 'Aronium belongs to Araceae'
- 'Aronium extinctum belongs to Aronium' according to Ettingshausen 1870
- 'Arpexylon belongs to Coenopteridales'
- 'Arpexylon simplex belongs to Arpexylon' according to Williamson 1872
- 'Arthmiocarpus belongs to Moraceae'
- 'Arthrocladion is a nomen nudum'
- 'Arthrodendromyelon belongs to Plantae'
- 'Arthrodendromyelon morierei belongs to Arthrodendromyelon' according to Lignier 1910
- 'Arthrodendron belongs to Calamitaceae'
- 'Arthrodendron belongs to Rhodophyceae'
- 'Arthrodendron diffusum belongs to Arthrodendron' according to Ulrich 1904
- 'Arthroon belongs to Problematica'
- 'Arthroon rochei belongs to Arthroon' according to Renault 1894
- 'Arthrophycus harlani belongs to Arthrophycus' according to Conrad 1852
- 'Arthropityostachys belongs to Calamitaceae'
- 'Arthropityostachys borgiensis belongs to Arthropityostachys' according to Renault 1896
- 'Arthropitys belongs to Calamitaceae'
- 'Arthropitys bistriata belongs to Arthropitys' according to Cotta 1864
- 'Arthroporella belongs to Plantae'
- 'Arthroporella catenularia belongs to Arthroporella' according to Stolley 1893
- 'Arthrostigma belongs to Psilophytophyta'
- 'Arthrostigma gracile belongs to Arthrostigma' according to Dawson 1871
- 'Arthroxylon belongs to Calamitales'
- 'Arthroxylon williamsonnii belongs to Arthroxylon' according to Reed 1952
- 'Artisia belongs to Cordaitales'
- 'Artocarpaceae belongs to Urticales'
- 'Artocarpidium belongs to Artocarpaceae'
- 'Artocarpidium integrifolium belongs to Artocarpidium' according to Unger 1851
- 'Artocarpoides belongs to Artocarpaceae'
- 'Artocarpoides conocephaloidea belongs to Artocarpoides' according to Saporta 1868
- 'Artocarpoides perampla belongs to Artocarpoides' according to Saporta 1865
- 'Artocarpophyllum is a nomen nudum'
- 'Artocarpophyllum belongs to Plantae'
- 'Artocarpophyllum damesii belongs to Artocarpophyllum' according to Crie 1889
- 'Artocarpophyllum occidentale belongs to Artocarpophyllum' according to Dawson 1894
- 'Artophycus belongs to Cyanobacteria'
- 'Artophycus columnaris belongs to Artophycus' according to Johnson 1940
- 'Arundinarites belongs to Plantae'
- 'Arundinarites restiaceus belongs to Arundinarites' according to Saporta 1862
- 'Arundinites belongs to Plantae'
- 'Arundinites wohlfarthi belongs to Arundinites' according to Otto 1854
- 'Aschemonia belongs to Plantae'
- 'Aschemonia gigantea belongs to Aschemonia' according to Dettmer 1915
- 'Asclepiadites belongs to Asclepiadaceae'
- 'Asclepiophyllum belongs to Asclepiadaceae'
- 'Asclepiophyllum podalyrii belongs to Asclepiophyllum' according to Unger 1952
- 'Ascodinium belongs to Dinophyceae'
- 'Ascosoma belongs to Dasycladophyceae'
- 'Ascosoma phaneroporata belongs to Ascosoma' according to Lorenz 1904
- 'Askisiella belongs to Plantae'
- 'Askisiella ramosa belongs to Askisiella' according to Chachlov 1939
- 'Asolanus belongs to Plantae'
- 'Asolanus ornithicnoides belongs to Asolanus' according to Wood 1860
- 'Asolenoxylon is a nomen nudum'
- 'Aspasia belongs to Plantae'
- 'Aspasia amplectens belongs to Aspasia' according to Stefani 1901
- 'Asperatopsophosphaera is a nomen nudum'
- 'Aspideae belongs to Pteridophyta'
- 'Aspidiaria is a subjective synonym of Lepidodendron'
- 'Aspidioides belongs to Pteridophyta'
- 'Aspidioides stuttgardiensis belongs to Aspidioides' according to Jaeger 1827
- 'Aspidion belongs to Plantae'
- 'Aspidion decemnervium belongs to Aspidion' according to Zalessky 1937
- 'Aspidiophyllum belongs to Plantae'
- 'Aspidiophyllum trilobatum belongs to Aspidiophyllum' according to Lesquereux 1876
- 'Aspidiopsis coniferoides belongs to Aspidiopsis' according to Potonie 1893
- 'Aspidiopteris is a nomen nudum'
- 'Aspidistes belongs to Filicales'
- 'Aspidistes thomasi belongs to Aspidistes' according to Harris 1961
- 'Aspidites belongs to Plantae'
- 'Aspidites belongs to Plantae'
- 'Aspidites dentatus belongs to Aspidites' according to Goeppert 1836
- 'Aspidites filixmas belongs to Aspidites' according to Colla 1829
- 'Aspidium macrocarpum belongs to Aspidium' according to Fontaine 1889
- 'Aspidospermoxylon belongs to Apocynaceae'
- 'Aspidospermoxylon uniseriatum belongs to Aspidospermoxylon' according to Kruse 1954
- 'Aspidostachys belongs to Plantae'
- 'Aspidostachys fertilis belongs to Aspidostachys' according to Remy 1955
- 'Asplenioides belongs to Pteridophyta'
- 'Asplenioides obtusum belongs to Asplenioides' according to Koenig 1825
- 'Aspleniopteris belongs to Pteridophyta'
- 'Aspleniopteris belongs to Pteridophyta'
- 'Aspleniopteris difformis belongs to Aspleniopteris' according to Sternberg 1825
- 'Aspleniopteris pinnatifida belongs to Aspleniopteris' according to Fontaine 1889
- 'Aspleniphyllum belongs to Plantae'
- 'Aspleniphyllum foersteri belongs to Aspleniphyllum' according to Debey and Ettingshausen 1940
- 'Asplenites belongs to Plantae'
- 'Asplenites belongs to Pteridophyta'
- 'Asplenites alethopteroides belongs to Asplenites' according to Ettingshausen 1854
- 'Asplenites alethopteroides is recombined as Desmopteris alethopteroides' according to Stur 1883
- 'Asplenites elegans belongs to Asplenites' according to Ettingshausen 1852
- 'Asplenites elegans is recombined as Rhacopteris elegans' according to Schimper 1869
- 'Asplenites heterophyllus belongs to Asplenites' according to Goeppert 1836
- 'Asplenites trichomanes belongs to Asplenites' according to Colla 1829
- 'Asteliaephyllum belongs to Dracaenaceae'
- 'Asteliaephyllum italicum belongs to Asteliaephyllum' according to Squinabol 1892
- 'Asterocalamites belongs to Plantae'
- 'Asterocalamites scrobiculatus belongs to Asterocalamites' according to Schlotheim 1879
- 'Asterocalamitopsis belongs to Plantae'
- 'Asterocalamitopsis sphenophylloides belongs to Asterocalamitopsis' according to Gothan 1949
- 'Asterocalyx belongs to Dioscoreaceae'
- 'Asterocalyx stiriacus belongs to Asterocalyx' according to Ettingshausen 1888
- 'Asterocarpus belongs to Marattiaceae'
- 'Asterocarpus sternbergii belongs to Asterocarpus' according to Goeppert 1836
- 'Asterocarpus sternbergii is recombined as Asterotheca sternbergii' according to Presl 1845
- 'Asterocelastrus belongs to Celastraceae'
- 'Asterocelastrus cretaceous belongs to Asterocelastrus' according to Velenovsky and Viniklar 1926
- 'Asterochlaena belongs to Pteridophyta'
- 'Asterochlaena cottai belongs to Asterochlaena' according to Corda 1845
- 'Asterochlaenopsis belongs to Pteridophyta'
- 'Asterochlaenopsis kirgisica belongs to Asterochlaenopsis' according to Stenzel 1930
- 'Asterocyclites belongs to Plantae'
- 'Asterodendron belongs to Plantae'
- 'Asterodendron issedonum belongs to Asterodendron' according to Eichwald 1846
- 'Asterodiscus belongs to Plantae'
- 'Asterodiscus disparis belongs to Asterodiscus' according to Zalessky 1937
- 'Asterophragmium belongs to Plantae'
- 'Asterophragmium superbum belongs to Asterophragmium' according to Reinsch 1880
- 'Asterophycus coxii belongs to Asterophycus' according to Lesquereux 1876
- 'Asterophyllites densifolius belongs to Asterophyllites' according to Grand'Eury 1877
- 'Asterophyllites densifolius is recombined as Alloasterophyllites densifolius' according to Geyler 1879
- 'Asterophyllites faujasii belongs to Asterophyllites' according to Brongniart 1822
- 'Asterophyllites faujasii is recombined as Ceratophyllites faujasii' according to Unger 1845
- 'Asterophyllites radiatus belongs to Asterophyllites' according to Brongniart 1822
- 'Asterophyllostachys belongs to Calamitaceae'
- 'Asterophyllostachys binneyana belongs to Asterophyllostachys' according to Schimper 1880
- 'Asterophyllum belongs to Ginkgoopsida'
- 'Asteropteris belongs to Cladoxylophyta'
- 'Asteropteris noveboracensis belongs to Asteropteris' according to Dawson 1880
- 'Asterosoma radiciforme belongs to Asterosoma' according to Otto 1854
- 'Asterotheca belongs to Marattiaceae'
- 'Asterothyrites belongs to Microthyriaceae'
- 'Asterothyrites sinuatus belongs to Asterothyrites' according to Cookson 1947
- 'Asteroxylon belongs to Lycopodophyta'
- 'Asteroxylon mackiei belongs to Asteroxylon' according to Kidston and Lang 1920
- 'Asteroxylon setchelli belongs to Asteroxylon' according to Read and Campbell 1939
- 'Asteroxylon setchelli is recombined as Stenokoleos setchelli' according to Hoskins and Cross 1951
- 'Asthenomyelon belongs to Calamitaceae'
- 'Asthenomyelon adversale belongs to Asthenomyelon' according to Leistikow 1962
- 'Astrapaeites belongs to Magnoliopsida'
- 'Astrapaeites pumicosus belongs to Astrapaeites' according to Langeron 1899
- 'Astrocaryopsis belongs to Plantae'
- 'Astrocaryopsis sanctaemanehildae belongs to Astrocaryopsis' according to Fliche 1896
- 'Astrochara is replaced by Hippuridella' according to Edwards 1932
- 'Astrocladium is a nomen nudum'
- 'Astrocupulites belongs to Plantae'
- 'Astrocupulites acuminatus belongs to Astrocupulites' according to Halle 1927
- 'Astromyelon belongs to Calamitales'
- 'Astromyelon williamsonis belongs to Astromyelon' according to Cash and Hicks 1883
- 'Astropolithon belongs to Problematica'
- 'Astropolithon hindii belongs to Astropolithon' according to Dawson 1878
- 'Atactoxylon belongs to Plantae'
- 'Atactoxylon linkii belongs to Atactoxylon' according to Hartig 1848
- 'Atherospermoxylon belongs to Monimiaceae'
- 'Athrotaxidium belongs to Plantae'
- 'Athrotaxidium bilinicum belongs to Athrotaxidium' according to Menzel 1900
- 'Athrotaxites belongs to Coniferales'
- 'Athrotaxites lycopodioides belongs to Athrotaxites' according to Unger 1849
- 'Athrotaxopsis grandis belongs to Athrotaxopsis' according to Fontaine 1889
- 'Atopochara belongs to Charophyta'
- 'Atopochara trivolvis belongs to Atopochara' according to Peck 1938
- 'Atractyliopsis belongs to Dasycladaceae'
- 'Attaleinites belongs to Palmae'
- 'Attaleinites apiculata belongs to Attaleinites' according to Tuzson 1914
- 'Auerbachia belongs to Plantae'
- 'Auerbachia echinata belongs to Auerbachia' according to Trautschold 1870
- 'Aulacolepis is a nomen nudum'
- 'Aulacolepis rhomboidalis belongs to Aulacolepis' according to Ettingshausen 1895
- 'Aulacophycos is a subjective synonym of Palaeophycus'
- 'Aulacophycus belongs to Plantae'
- 'Aulacophycus costatus belongs to Aulacophycus' according to Eichwald 1860
- 'Aulacopteris is a nomen nudum'
- 'Aulacopteris belongs to Pteridophyta'
- 'Aulacopteris vulgaris belongs to Aulacopteris' according to Grand'Eury 1877
- 'Aulacotheca belongs to Pteridospermophyta'
- 'Aulacotheca elongata belongs to Aulacotheca' according to Kidston 1933
- 'Aulacoxylon belongs to Angiospermae'
- 'Aulacoxylon sparnacense belongs to Aulacoxylon' according to Combes 1907
- 'Aularthrophyton belongs to Plantae'
- 'Aularthrophyton foromosum belongs to Aularthrophyton' according to Massalongo 1857
- 'Aulophycus repens belongs to Aulophycus' according to Fenton and Fenton 1939
- 'Aurantiaceae belongs to Sapindales'
- 'Austrella belongs to Plantae'
- 'Austrella rigida belongs to Austrella' according to Dana 1849
- 'Austroclepsis belongs to Zygopteridae'
- 'Autophyllites belongs to Plantae'
- 'Autophyllites furcatus belongs to Autophyllites' according to Grand'Eury 1890
- 'Azollophyllum belongs to Pteridopsida'
- 'Azollophyllum primaevum belongs to Azollophyllum' according to Penhallow 1890
- 'Babetosphaera belongs to Problematica'
- 'Babetosphaera africana belongs to Babetosphaera' according to Boureau and Monod 1958
- 'Bacca belongs to Plantae'
- 'Bacca diospyroides belongs to Bacca' according to Engelhardt 1922
- 'Baccharites belongs to Plantae'
- 'Baccinellula belongs to Desmidiaceae'
- 'Baccinellula cosmarioides belongs to Baccinellula' according to Weyland 1963
- 'Baccites belongs to Plantae'
- 'Baccites cacaoides belongs to Baccites' according to Zenker 1833
- 'Bachasupteris belongs to Pteridophyta'
- 'Bachasupteris lobata belongs to Bachasupteris' according to Zalessky 1937
- 'Bachtia belongs to Plantae'
- 'Bachtia ovata belongs to Bachtia' according to Neuburg 1960
- 'Bacillarites belongs to Plantae'
- 'Bacillarites problematicus belongs to Bacillarites' according to Feistmantel 1867
- 'Bacillites belongs to Schizomycetes'
- 'Bacillites permiensis belongs to Bacillites' according to Renault and Bertrand 1898
- 'Bacisphaeridium belongs to Acritarcha'
- 'Bacisphaeridium bacifer belongs to Bacisphaeridium' according to Eisenack 1962
- 'Bactrites belongs to Palmae'
- 'Bactrites pandanifoliolus belongs to Bactrites' according to Berry 1924
- 'Bactryllium canaliculatum belongs to Bactryllium' according to Heer 1853
- 'Baicalia belongs to Plantae'
- 'Baicalia baicalia belongs to Baicalia' according to Maslov 1963
- 'Baiera belongs to Ginkgophyta'
- 'Baiera dichotoma belongs to Baiera' according to Braun 1843
- 'Baiera dichotoma is recombined as Jeanpaulia dichotoma' according to Unger 1845
- 'Baierella belongs to Plantae'
- 'Baierella bohnei belongs to Baierella' according to Potonie 1933
- 'Baieridium belongs to Plantae'
- 'Baieridium alphlebiaeforme belongs to Baieridium' according to Gothan and Gimm-Elgersberg 1930
- 'Baieropsis belongs to Ginkgophyta'
- 'Baieropsis expansa belongs to Baieropsis' according to Fontaine 1889
- 'Bajdaievia belongs to Plantae'
- 'Bajdaievia linearis belongs to Bajdaievia' according to Neuburg 1960
- 'Bajera belongs to Plantae'
- 'Bajera scanica belongs to Bajera' according to Sternberg 1825
- 'Balanitocarpum belongs to Zygophyllaceae'
- 'Balanitocarpum ovatum belongs to Balanitocarpum' according to Menzel 1913
- 'Balantites belongs to Pteridophyta'
- 'Balantites martii belongs to Balantites' according to Goeppert 1836
- 'Baliostichus belongs to Coniferales'
- 'Baliostichus ornatus belongs to Baliostichus' according to Sternberg 1833
- 'Baloghiaephyllum belongs to Euphorbiaceae'
- 'Baloghiaephyllum miocenicum belongs to Baloghiaephyllum' according to Ettingshausen 1962
- 'Baltisphaeridium belongs to Acritarcha'
- 'Baltisphaeridium longispinosum belongs to Baltisphaeridium' according to Eisenack 1958
- 'Bambusites belongs to Gramineae'
- 'Bambusites arthrostylinus belongs to Bambusites' according to Ettingshausen 1886
- 'Bambusium belongs to Plantae'
- 'Bambusium sepultum belongs to Bambusium' according to Unger 1845
- 'Banaraphyllum belongs to Flacourtiaceae'
- 'Banisteriaecarpum belongs to Malpighiaceae'
- 'Banisteriophyllum belongs to Malpighiaceae'
- 'Banisteriophyllum australiense belongs to Banisteriophyllum' according to Ettingshausen 1886
- 'Banksicarpus belongs to Magnoliopsida'
- 'Banksicarpus cretaseus belongs to Banksicarpus' according to Velenovsky and Viniklar 1927
- 'Banksieaephyllum belongs to Proteaceae'
- 'Banksieaephyllum angustum belongs to Banksieaephyllum' according to Cookson and Duigan 1950
- 'Banksioxylon is a nomen nudum'
- 'Banksiphyllum belongs to Plantae'
- 'Banksiphyllum pusillum belongs to Banksiphyllum' according to Velenovsky 1889
- 'Banksites integer belongs to Banksites' according to Saporta 1861
- 'Baptisiaecarpum belongs to Plantae'
- 'Baptisiaecarpum schrotzbergense belongs to Baptisiaecarpum' according to Noetzold 1956
- 'Baragwanathia belongs to Lycopodophyta'
- 'Baragwanathia longifolia belongs to Baragwanathia' according to Lang and Cookson 1935
- 'Barakaria belongs to Sphenopsida'
- 'Barakaroxylon belongs to Gymnospermophyta'
- 'Bardella belongs to Coniferales'
- 'Bardella splendida belongs to Bardella' according to Zalessky 1937
- 'Bardia belongs to Pteridospermophyta'
- 'Bardia maueri belongs to Bardia' according to Zalessky 1933
- 'Bardocarpus aliger belongs to Bardocarpus' according to Zalessky 1937
- 'Barinophyton richardsoni belongs to Barinophyton' according to White 1905
- 'Barinostrobus belongs to Plantae'
- 'Barinostrobus spicatus belongs to Barinostrobus' according to Dawson 1941
- 'Barrandeina belongs to Psilophytophyta'
- 'Barrandeina dusliana belongs to Barrandeina' according to Krejci 1882
- 'Barrandeinopsis belongs to Plantae'
- 'Barrandeinopsis beliakovii belongs to Barrandeinopsis' according to Kryshtofovich 1955
- 'Barrealia belongs to Matoniaceae'
- 'Barrealia dichotoma belongs to Barrealia' according to Frenguelli 1942
- 'Barringtonioxylon belongs to Lecythidaceae'
- 'Barsassia belongs to Psilophytales'
- 'Barsassia ornata belongs to Barsassia' according to Zalessky 1933
- 'Bartholinodendron belongs to Pinales'
- 'Bartholinodendron punctulatum belongs to Bartholinodendron' according to Florin 1958
- 'Bartramiaceae belongs to Bryopsida'
- 'Bassania belongs to Plantae'
- 'Bassania keuperiana belongs to Bassania' according to Gasparis 1895
- 'Bathypteris belongs to Osmundaceae'
- 'Bathypteris rhomboidea belongs to Bathypteris' according to Eichwald 1860
- 'Batodendron is a nomen nudum'
- 'Batodendron belongs to Plantae'
- 'Bauhinites belongs to Leguminosae'
- 'Bauhinites groenlandica belongs to Bauhinites' according to Seward and Conway 1935
- 'Bavlinella belongs to Problematica'
- 'Bavlinella faveolatus belongs to Bavlinella' according to Shepeleva 1962
- 'Beania belongs to Cycadales'
- 'Beaniopsis belongs to Cycadaceae'
- 'Beaniopsis rajmahalensis belongs to Beaniopsis' according to Ganju 1947
- 'Beatricea belongs to Plantae'
- 'Beatricea nodulosa belongs to Beatricea' according to Billings 1857
- 'Bechera belongs to Plantae'
- 'Bechera ceratophylloides belongs to Bechera' according to Sternberg 1825
- 'Beckettia belongs to Cornaceae'
- 'Beckettia mastixioides belongs to Beckettia' according to Reid and Chandler 1933
- 'Becklesia belongs to Plantae'
- 'Becklesia anomala belongs to Becklesia' according to Seward 1895
- 'Becktonia belongs to Moraceae'
- 'Becktonia hantonensis belongs to Becktonia' according to Chandler 1961
- 'Bedheimia belongs to Lycopodiales'
- 'Bedheimia ruehleidelilienstern belongs to Bedheimia' according to Schuster 1932
- 'Beinertia belongs to Pteridophyta'
- 'Beinertia gymnogrammoides belongs to Beinertia' according to Goeppert 1836
- 'Belemnopteris belongs to Pteridophyta'
- 'Belemnopteris woodmasoniana belongs to Belemnopteris' according to Feistmantel 1876
- 'Belenophyllum is a nomen nudum'
- 'Belenopteris is a nomen nudum'
- 'Belidoxylon belongs to Plantae'
- 'Bellarinea belongs to Podocarpaceae'
- 'Bellopteris belongs to Pteridophyta'
- 'Bellopteris corsini belongs to Bellopteris' according to Radforth and Walton 1960
- 'Belodendron is a nomen nudum'
- 'Belodinium belongs to Dinoflagellata'
- 'Belonodendron belongs to Plantae'
- 'Belonodendron densifolium belongs to Belonodendron' according to Marck 1863
- 'Beltina belongs to Problematica'
- 'Beltina danai belongs to Beltina' according to Walcott 1899
- 'Belzungia belongs to Plantae'
- 'Belzungia borneti belongs to Belzungia' according to Morellet 1908
- 'Bembergia belongs to Plantae'
- 'Bembergia pentatrias belongs to Bembergia' according to Caspary 1881
- 'Benizia belongs to Pteridophyta'
- 'Benizia calopteris belongs to Benizia' according to Debey and Ettingshausen 1859
- 'Bennetticarpus belongs to Bennettitales'
- 'Bennettistemon belongs to Bennettitales'
- 'Bennettitacearum belongs to Cycadophyta'
- 'Bennettitanthus belongs to Plantae'
- 'Bennettitanthus masculinus belongs to Bennettitanthus' according to Turutanova-Ketova 1930
- 'Bennettites belongs to Cycadophyta'
- 'Bennettites saxbyanus belongs to Bennettites' according to Carruthers 1870
- 'Bennettitolepis belongs to Bennettitales'
- 'Bensonia belongs to Problematica'
- 'Bensonia ovata belongs to Bensonia' according to Buckman 1845
- 'Bensonites belongs to Plantae'
- 'Bensonites fusiformis belongs to Bensonites' according to Scott 1908
- 'Benstedtia belongs to Coniferophyta'
- 'Benstedtia benstedi belongs to Benstedtia' according to Koenig 1911
- 'Benthamiphyllum belongs to Plantae'
- 'Benthamiphyllum dubium belongs to Benthamiphyllum' according to Velenovsky 1889
- 'Berberidiphyllum belongs to Berberidaceae'
- 'Berberidiphyllum reflexum belongs to Berberidiphyllum' according to Dusen 1899
- 'Berendtia belongs to Angiospermae'
- 'Berendtia primuloides belongs to Berendtia' according to Goeppert 1845
- 'Beresella erecta belongs to Beresella' according to Maslov and Kulik 1956
- 'Bergeria belongs to Lepidodendraceae'
- 'Bergeria acuta belongs to Bergeria' according to Presl 1838
- 'Bergiophyton is a nomen nudum'
- 'Bergiopteris belongs to Plantae'
- 'Bergiopteris insignis belongs to Bergiopteris' according to Kurtz 1921
- 'Bernettia belongs to Cycadophyta'
- 'Bernettia inopinata belongs to Bernettia' according to Gothan 1914
- 'Bernoullia belongs to Pteridophyta'
- 'Berriochloa belongs to Gramineae'
- 'Berriochloa glabra belongs to Berriochloa' according to Berry 1932
- 'Berrya belongs to Plantae'
- 'Berrya racemosa belongs to Berrya' according to Knowlton 1930
- 'Berwynia belongs to Lycopodophyta'
- 'Berwynia carruthersi belongs to Berwynia' according to Hicks 1882
- 'Betulinium belongs to Plantae'
- 'Betulinium tenerum belongs to Betulinium' according to Unger 1842
- 'Betuliphyllum belongs to Betulaceae'
- 'Betuliphyllum patagonicum belongs to Betuliphyllum' according to Dusen 1899
- 'Betulites belongs to Plantae'
- 'Betulites salzhausensis belongs to Betulites' according to Goeppert 1838
- 'Betuloxylon belongs to Betulaceae'
- 'Betuloxylon oligocenicum belongs to Betuloxylon' according to Kaiser 1880
- 'Beuttneriophyllum belongs to Plantae'
- 'Beuttneriophyllum aequalifolium belongs to Beuttneriophyllum' according to Goeppert 1960
- 'Bevocastria conglobata belongs to Bevocastria' according to Garwood 1931
- 'Biarmella belongs to Pteridophyta'
- 'Biarmella triloba belongs to Biarmella' according to Zalessky 1939
- 'Biarmobaiera belongs to Ginkgophyta'
- 'Biarmobaiera uralensis belongs to Biarmobaiera' according to Zalessky 1939
- 'Biarmodendron belongs to Coniferales'
- 'Biarmodendron foliosum belongs to Biarmodendron' according to Zalessky 1939
- 'Biarmopteris pulchra belongs to Biarmopteris' according to Zalessky 1937
- 'Bicarinellum belongs to Dinophyceae'
- 'Bicarinellum castaninum belongs to Bicarinellum' according to Deflandre 1948
- 'Bicarpellites belongs to Plantae'
- 'Bicoemplectopteridium belongs to Gigantopteridales'
- 'Bicoemplectopteris belongs to Gigantopteridales'
- 'Bicoemplectopteris hallei belongs to Bicoemplectopteris' according to Asama 1959
- 'Bicoloria belongs to Plantae'
- 'Bicoloria gothani belongs to Bicoloria' according to Horst 1957
- 'Bicorium belongs to Corallinaceae'
- 'Bicorium kusbassense belongs to Bicorium' according to Maslov 1956
- 'Bidentites belongs to Compositae'
- 'Bidentites antiquus belongs to Bidentites' according to Heer 1859
- 'Biechelerella belongs to Dinoflagellata'
- 'Biechelerella jurassica belongs to Biechelerella' according to Deflandre 1948
- 'Bignoniaecarpum belongs to Bignoniaceae'
- 'Bignoniaecarpum egregyeme belongs to Bignoniaecarpum' according to Andreanszky 1955
- 'Bignonicapsula belongs to Bignoniaceae'
- 'Bignonicapsula formosa belongs to Bignonicapsula' according to Berry 1930
- 'Bignoniophyllum belongs to Bignoniaceae'
- 'Bignoniophyllum getoniaeformis belongs to Bignoniophyllum' according to Ettingshausen 1870
- 'Bignoniphyllum belongs to Bignoniaceae'
- 'Bignoniphyllum cordatum belongs to Bignoniphyllum' according to Velenovsky 1889
- 'Bignonites belongs to Bignoniaceae'
- 'Bignonites americanus belongs to Bignonites' according to Berry 1925
- 'Bignonites palaeospermus belongs to Bignonites' according to Saporta 1861
- 'Bignonoides belongs to Bignoniaceae'
- 'Bija belongs to Rhodophyceae'
- 'Bija sibirica belongs to Bija' according to Vologdin 1932
- 'Bilignea belongs to Pteridospermophyta'
- 'Bilignea solida belongs to Bilignea' according to Kidston 1923
- 'Billardierites belongs to Pittosporaceae'
- 'Billardierites longistylus belongs to Billardierites' according to Caspary 1882
- 'Bilsdalea belongs to Coniferales'
- 'Bilsdalea dura belongs to Bilsdalea' according to Harris 1952
- 'Biorbia belongs to Boraginaceae'
- 'Biorbia rugosa belongs to Biorbia' according to Berry 1932
- 'Biotocalamites is a nomen nudum'
- 'Biscalitheca belongs to Coenopteridales'
- 'Biscalitheca musata belongs to Biscalitheca' according to Mamay 1957
- 'Bischofioxylon belongs to Euphorbiaceae'
- 'Bischofioxylon miocenicum belongs to Bischofioxylon' according to Ramanujam 1960
- 'Bjuvia belongs to Cycadophyta'
- 'Bjuvia simplex belongs to Bjuvia' according to Florin 1933
- 'Blasaria belongs to Lycopodophyta'
- 'Blasaria siberica belongs to Blasaria' according to Zalessky 1934
- 'Blastolepis belongs to Cycadophyta'
- 'Blastolepis otozamites belongs to Blastolepis' according to Zigno 1885
- 'Blastophragmium belongs to Plantae'
- 'Blastophragmium elegans belongs to Blastophragmium' according to Reinsch 1880
- 'Blastophycus belongs to Problematica'
- 'Blastophycus diadematus belongs to Blastophycus' according to Miller and Dyer 1878
- 'Blechnoxylon belongs to Plantae'
- 'Blechnoxylon talbragarense belongs to Blechnoxylon' according to Etheridge 1899
- 'Blosenbergia belongs to Lycopodophyta'
- 'Blosenbergia gallwitziana belongs to Blosenbergia' according to Gothan 1939
- 'Bockschia belongs to Pteridophyta'
- 'Bockschia flabellata belongs to Bockschia' according to Goeppert 1836
- 'Boegendorfia belongs to Plantae'
- 'Boegendorfia semiarticulata belongs to Boegendorfia' according to Gothan and Zimmerman 1932
- 'Bognoria belongs to Sabiaceae'
- 'Bogutschanophycus belongs to Plantae'
- 'Bogutschanophycus mariae belongs to Bogutschanophycus' according to Korde 1954
- 'Boiophyton belongs to Plantae'
- 'Boiophyton pragense belongs to Boiophyton' according to Obrhel 1959
- 'Bolbopodium belongs to Cycadophyta'
- 'Bolbopodium pictaviense belongs to Bolbopodium' according to Saporta 1874
- 'Boliviana belongs to Plantae'
- 'Boliviana melocactus belongs to Boliviana' according to Salter 1860
- 'Bolonia belongs to Problematica'
- 'Bolonia lata belongs to Bolonia' according to Meunier 1886
- 'Bombaciphyllum belongs to Malvaceae'
- 'Bombaciphyllum opacum belongs to Bombaciphyllum' according to Engelhardt 1891
- 'Bombacites belongs to Bombacaceae'
- 'Bombacites formosus belongs to Bombacites' according to Berry 1916
- 'Bombacophyllum belongs to Plantae'
- 'Bombacophyllum argillaceum belongs to Bombacophyllum' according to Velenovsky 1889
- 'Bonaventurea belongs to Pteridophyta'
- 'Bonaventurea cardinalis belongs to Bonaventurea' according to Debey and Ettingshausen 1859
- 'Bornetellaceae belongs to Dasycladales'
- 'Bornia belongs to Plantae'
- 'Bornia equisetiformis belongs to Bornia' according to Schlotheim 1825
- 'Boroldaiphycus belongs to Plantae'
- 'Boroldaiphycus borovikovi belongs to Boroldaiphycus' according to Vologdin 1948
- 'Boroviczia belongs to Plantae'
- 'Boroviczia karpinskii belongs to Boroviczia' according to Zalessky 1905
- 'Borraginites belongs to Boraginaceae'
- 'Borraginites myosotiflorus belongs to Borraginites' according to Heer 1859
- 'Bostricophyton pantanellii belongs to Bostricophyton' according to Squinabol 1890
- 'Bosworthia belongs to Problematica'
- 'Bosworthia simulans belongs to Bosworthia' according to Walcott 1919
- 'Bothrodendron belongs to Plantae'
- 'Bothrodendron punctatum belongs to Bothrodendron' according to Lindley and Hutton 1833
- 'Bothrostrobus belongs to Plantae'
- 'Bothrostrobus olyri belongs to Bothrostrobus' according to Zeiller 1904
- 'Botomaella belongs to Problematica'
- 'Botomaella zelenovi belongs to Botomaella' according to Korde 1958
- 'Botominella belongs to Plantae'
- 'Botominella lineata belongs to Botominella' according to Reitlinger 1959
- 'Botrychiopsis belongs to Pteridophyta'
- 'Botrychiopsis weissiana belongs to Botrychiopsis' according to Kurtz 1894
- 'Botrychioxylon belongs to Coenopteridales'
- 'Botrychioxylon paradoxum belongs to Botrychioxylon' according to Scott 1912
- 'Botryococcites belongs to Plantae'
- 'Botryococcites largae belongs to Botryococcites' according to Bertrand 1898
- 'Botryoconus belongs to Cordaitales'
- 'Botryoconus goldenbergi belongs to Botryoconus' according to Goeppert 1864
- 'Botryopteris belongs to Coenopteridales'
- 'Botryopteris forensis belongs to Botryopteris' according to Renault 1875
- 'Botrytites belongs to Plantae'
- 'Botrytites similis belongs to Botrytites' according to Menge and Goeppert 1853
- 'Bottgeria is a nomen nudum'
- 'Boueina hochstetteri belongs to Boueina' according to Toula 1883
- 'Boulaya belongs to Pteridospermophyta'
- 'Boulaya fertilis belongs to Boulaya' according to Kidston 1933
- 'Bowerbankella belongs to Menispermaceae'
- 'Bowerbankella tiliacoroidea belongs to Bowerbankella' according to Reid and Chandler 1933
- 'Bowerbankia is a nomen nudum'
- 'Boweria belongs to Pteridophyta'
- 'Boweria schatzarensis belongs to Boweria' according to Stur 1911
- 'Bowmanites belongs to Sphenophyllales'
- 'Bowmanites cambrensis belongs to Bowmanites' according to Binney 1871
- 'Brachybaculites belongs to Bacteria'
- 'Brachybaculites semelnodatus belongs to Brachybaculites' according to Gruess 1928
- 'Brachycarphium belongs to Fungi'
- 'Brachychara belongs to Charophyta'
- 'Brachycladites belongs to Plantae'
- 'Brachycladium is replaced by Brachycarphium' according to Berkeley 1849
- 'Brachycladium thomasinum belongs to Brachycladium' according to Berkeley 1848
- 'Brachycladium thomasinum is recombined as Brachycarphium thomasinum' according to Berkeley 1849
- 'Brachydactylus belongs to Plantae'
- 'Brachydactylus radialis belongs to Brachydactylus' according to Reis 1923
- 'Brachyoxylon belongs to Araucariaceae'
- 'Brachyoxylon notabile belongs to Brachyoxylon' according to Hollick and Jeffrey 1909
- 'Brachyphyllum belongs to Coniferales'
- 'Brachyphyllum mamillare belongs to Brachyphyllum' according to Brongniart 1828
- 'Brachyphyllum setosum belongs to Brachyphyllum' according to Phillips 1875
- 'Brachyphyllum setosum is recombined as Haiburnia setosa' according to Harris 1952
- 'Brachyruscus belongs to Liliaceae'
- 'Brachyruscus alleni belongs to Brachyruscus' according to Cockerell 1922
- 'Brandonia belongs to Plantae'
- 'Brandonia globulus belongs to Brandonia' according to Perkins 1904
- 'Braseniopsis belongs to Nymphaeaceae'
- 'Braseniopsis venulosa belongs to Braseniopsis' according to Saporta 1894
- 'Bravardia is a nomen nudum'
- 'Bredaea belongs to Plantae'
- 'Bredaea moroides belongs to Bredaea' according to Goeppert 1854
- 'Brefeldiellites belongs to Microthyriaceae'
- 'Brefeldiellites fructiflabella belongs to Brefeldiellites' according to Dilcher 1965
- 'Bresciphyllum belongs to Angiospermae'
- 'Bresciphyllum cretaceum belongs to Bresciphyllum' according to Velenovsky 1889
- 'Bretonia belongs to Plantae'
- 'Bretonia hardingheni belongs to Bretonia' according to Bertrand and Hovelacque 1892
- 'Briardina belongs to Plantae'
- 'Briardina archiace belongs to Briardina' according to Munier-Chalmas 1922
- 'Bridelioxylon belongs to Euphorbiaceae'
- 'Bridelioxylon cuddalorense belongs to Bridelioxylon' according to Ramanujam 1956
- 'Brightonia belongs to Plantae'
- 'Brightonia arota belongs to Brightonia' according to Harris 1932
- 'Brittsia belongs to Pteridophyta'
- 'Brochopsophosphaera belongs to Acritarcha'
- 'Brochopsophosphaera minimus belongs to Brochopsophosphaera' according to Shepeleva and Timofeev 1963
- 'Broeckella belongs to Dasycladaceae'
- 'Broeckella belgica belongs to Broeckella' according to Munier-Chalmas 1922
- 'Broggeria belongs to Plantae'
- 'Broggeria norvegica belongs to Broggeria' according to Nathorst 1915
- 'Bromeliaceophyllum belongs to Bromeliaceae'
- 'Bromeliaceophyllum rhenanum belongs to Bromeliaceophyllum' according to Weyland 1957
- 'Bromelianthus belongs to Bromeliaceae'
- 'Bromelianthus heuflerianus belongs to Bromelianthus' according to Massalongo 1859
- 'Bromelites belongs to Plantae'
- 'Bromelites dolinski belongs to Bromelites' according to Schmalhausen 1883
- 'Brongniartites belongs to Plantae'
- 'Brongniartites graecus belongs to Brongniartites' according to Unger 1845
- 'Brongniartites salicifolius belongs to Brongniartites' according to Fischer 1927
- 'Bronnites belongs to Plantae'
- 'Bronnites antiquensis belongs to Bronnites' according to Unger 1842
- 'Brukmannia belongs to Sphenopsida'
- 'Brukmannia tenuifolia belongs to Brukmannia' according to Sternberg 1825
- 'Brunswickia belongs to Plantae'
- 'Brunswickia dubia belongs to Brunswickia' according to Wherry 1916
- 'Bryacites is a nomen nudum'
- 'Bryasterites belongs to Plantae'
- 'Bryocarpus is a nomen nudum'
- 'Bubnoffphycos belongs to Plantae'
- 'Bubnoffphycos rhombeum belongs to Bubnoffphycos' according to Daber 1960
- 'Bubulcia belongs to Plantae'
- 'Bucheria belongs to Psilophytales'
- 'Bucheria ovata belongs to Bucheria' according to Dorf 1933
- 'Bucinella belongs to Plantae'
- 'Bucinella verrucana belongs to Bucinella' according to Fucini 1936
- 'Bucklandiopsis belongs to Cycadophyta'
- 'Bucklandiopsis ovalis belongs to Bucklandiopsis' according to Roselt 1960
- 'Budingia belongs to Plantae'
- 'Buedingiisphaeridium belongs to Acritarcha'
- 'Buedingiisphaeridium permicum belongs to Buedingiisphaeridium' according to Schaarschmidt 1963
- 'Bulbodinium belongs to Dinoflagellata'
- 'Bulbodinium seitzi belongs to Bulbodinium' according to Wetzel 1960
- 'Bureja belongs to Cycadales'
- 'Bureja rigida belongs to Bureja' according to Prinada 1956
- 'Buriadia belongs to Plantae'
- 'Burretia belongs to Tiliaceae'
- 'Bursericarpum belongs to Burseraceae'
- 'Bursericarpum angulatum belongs to Bursericarpum' according to Reid and Chandler 1933
- 'Burserites belongs to Burseraceae'
- 'Burserites fayettensis belongs to Burserites' according to Berry 1924
- 'Burserites venezuelana belongs to Burserites' according to Berry 1921
- 'Burtinia belongs to Palmae'
- 'Burtinia faujasii belongs to Burtinia' according to Endlicher 1845
- 'Burtonella belongs to Capparidaceae'
- 'Burtonella emarginata belongs to Burtonella' according to Chandler 1962
- 'Butefia belongs to Plantae'
- 'Butefia ensiformis belongs to Butefia' according to Heer 1964
- 'Buthotrephis belongs to Problematica'
- 'Buthotrephis is replaced by Bythotrephis' according to Eichwald 1860
- 'Buthotrephis gracilis belongs to Buthotrephis' according to Hall 1847
- 'Butomites belongs to Plantae'
- 'Butomites cretaceus belongs to Butomites' according to Velenovsky 1889
- 'Buzgulella belongs to Plantae'
- 'Buzgulella serrata belongs to Buzgulella' according to Korde 1951
- 'Bysmatospermum belongs to Bennettitales'
- 'Bysmatospermum macrotrachelum belongs to Bysmatospermum' according to Harris 1935
- 'Bythocladus belongs to Plantae'
- 'Bythocladus laxus belongs to Bythocladus' according to Hall 1894
- 'Bythotrephis belongs to Plantae'
- 'Byttneriophyllum belongs to Plantae'
- 'Byttneriophyllum tiliaefolium belongs to Byttneriophyllum' according to Braun 1965
- 'Cactites belongs to Plantae'
- 'Cactites giganteus belongs to Cactites' according to Martius 1822
- 'Caelestites belongs to Problematica'
- 'Caelestites sexangulatus belongs to Caelestites' according to Staplin 1962
- 'Caenodendron belongs to Lycopodophyta'
- 'Caenodendron primaevum belongs to Caenodendron' according to Zalessky 1918
- 'Caenomyces belongs to Fungi'
- 'Caenomyces laurinea belongs to Caenomyces' according to Berry 1916
- 'Caenopterites belongs to Plantae'
- 'Caenopterites volkmanni belongs to Caenopterites' according to Goeppert 1836
- 'Caenoxylon belongs to Cordaitales'
- 'Caenoxylon scotti belongs to Caenoxylon' according to Zalessky 1911
- 'Caesalpinioxylon is replaced by Shoreoxylon' according to Berger 1923
- 'Caesalpinioxylon oweni belongs to Caesalpinioxylon' according to Carruthers 1931
- 'Caesalpinioxylon oweni is recombined as Evodioxylon oweni' according to Chiarugi 1933
- 'Caesalpinioxylon palembangense is recombined as Shoreoxylon palembangense' according to Berger 1923
- 'Caesalpinioxylon palembangense belongs to Caesalpinioxylon' according to Kraeusel 1922
- 'Caesalpinites belongs to Caesalpiniaceae'
- 'Caesalpinites dispersus belongs to Caesalpinites' according to Saporta 1862
- 'Caesalpinium belongs to Caesalpiniaceae'
- 'Caesalpinium oweni belongs to Caesalpinium' according to Carruthers 1910
- 'Caesalpinium trioliense belongs to Caesalpinium' according to Schleiden 1855
- 'Caladiosoma belongs to Araceae'
- 'Caladiosoma miocenica belongs to Caladiosoma' according to Berry 1925
- 'Calamariophyllum belongs to Plantae'
- 'Calamariopsis belongs to Plantae'
- 'Calamitea belongs to Calamitaceae'
- 'Calamitea striata belongs to Calamitea' according to Cotta 1832
- 'Calamites belongs to Plantae'
- 'Calamites approximatus belongs to Calamites' according to Schlotheim 1828
- 'Calamites approximatus is recombined as Endocalamites approximatus' according to Grand'Eury 1877
- 'Calamites approximatus is recombined as Myelocalamites approximatus' according to Grand'Eury 1877
- 'Calamites cannaeformis belongs to Calamites' according to Schlotheim 1820
- 'Calamites radiatus belongs to Calamites' according to Brongniart 1828
- 'Calamites roemeri belongs to Calamites' according to Goeppert 1850
- 'Calamites roemeri is recombined as Mesocalamites roemeri' according to Hirmer 1927
- 'Calamites scrobiculatus belongs to Calamites' according to Schlotheim 1820
- 'Calamites scrobiculatus is recombined as Protocalamites scrobiculatus' according to Goebel 1906
- 'Calamitina belongs to Calamitaceae'
- 'Calamitina goepperti belongs to Calamitina' according to Ettingshausen 1876
- 'Calamitomyelon belongs to Calamitaceae'
- 'Calamitomyelon morierei belongs to Calamitomyelon' according to Lignier 1910
- 'Calamocarpon belongs to Calamitaceae'
- 'Calamocarpon insignis belongs to Calamocarpon' according to Baxter 1963
- 'Calamocladus belongs to Calamitaceae'
- 'Calamocladus longifolius belongs to Calamocladus' according to Brongniart 1869
- 'Calamodendrea belongs to Calamitaceae'
- 'Calamodendrea rhizobola belongs to Calamodendrea' according to Grand'Eury 1877
- 'Calamodendrofloyos belongs to Calamitaceae'
- 'Calamodendrofloyos cruciatus belongs to Calamodendrofloyos' according to Sternberg 1877
- 'Calamodendron belongs to Calamitaceae'
- 'Calamodendron striatum belongs to Calamodendron' according to Brongniart 1849
- 'Calamodendrophyllum belongs to Calamitaceae'
- 'Calamodendrophyllum bifurcatum belongs to Calamodendrophyllum' according to Grand'Eury 1879
- 'Calamodendrostachys belongs to Plantae'
- 'Calamodendrostachys dubius belongs to Calamodendrostachys' according to Renault 1890
- 'Calamodendroxylon belongs to Calamitaceae'
- 'Calamodendroxylon striatum belongs to Calamodendroxylon' according to Cotta 1877
- 'Calamophloios belongs to Calamitaceae'
- 'Calamophloios rugosus belongs to Calamophloios' according to Arber 1916
- 'Calamophycus belongs to Plantae'
- 'Calamophycus septus belongs to Calamophycus' according to Lesquereux 1877
- 'Calamophyllites belongs to Plantae'
- 'Calamophyllites communis belongs to Calamophyllites' according to Grand'Eury 1877
- 'Calamophyllites geinitzii belongs to Calamophyllites' according to Grand'Eury 1890
- 'Calamophyton primaevum belongs to Calamophyton' according to Kraeusel and Weyland 1925
- 'Calamopitus belongs to Plantae'
- 'Calamopitus parrani belongs to Calamopitus' according to Grand'Eury 1890
- 'Calamopitys belongs to Calamopityaceae'
- 'Calamopitys eupunctata belongs to Calamopitys' according to Thomas 1935
- 'Calamopitys saturni belongs to Calamopitys' according to Unger 1856
- 'Calamopitys zonata belongs to Calamopitys' according to Kidston 1923
- 'Calamopitys zonata is recombined as Endoxylon zonatum' according to Scott 1925
- 'Calamopsis belongs to Cycadophyta'
- 'Calamopsis is replaced by Calamariopsis' according to Potonie 1902
- 'Calamopsis bredana belongs to Calamopsis' according to Heer 1859
- 'Calamopteris belongs to Calamopityaceae'
- 'Calamopteris debilis belongs to Calamopteris' according to Unger 1856
- 'Calamorrhiza belongs to Calamitales'
- 'Calamostachys typica belongs to Calamostachys' according to Schimper 1869
- 'Calamosyrinx belongs to Calamopityaceae'
- 'Calamosyrinx belongs to Sigillariaceae'
- 'Calamosyrinx devonica belongs to Calamosyrinx' according to Unger 1856
- 'Calamosyrinx zwickaviensis belongs to Calamosyrinx' according to Petzholdt 1841
- 'Calamoxylon belongs to Lycopodophyta'
- 'Calamoxylon cycadeum belongs to Calamoxylon' according to Corda 1838
- 'Calathella belongs to Chlorophyta'
- 'Calathella kraeuseii belongs to Calathella' according to Florin 1929
- 'Calathiops belongs to Pteridospermophyta'
- 'Calathiops beinertiana belongs to Calathiops' according to Goeppert 1865
- 'Calathospermum belongs to Pteridospermophyta'
- 'Calathospermum scoticum belongs to Calathospermum' according to Walton 1940
- 'Calatoloides belongs to Icacinaceae'
- 'Calatoloides eocenicum belongs to Calatoloides' according to Berry 1922
- 'Calcicarpinium belongs to Dinophyceae'
- 'Calcicarpinium tetraedricum belongs to Calcicarpinium' according to Deflandre 1948
- 'Calcideletrix belongs to Plantae'
- 'Calcideletrix flexuosa belongs to Calcideletrix' according to Maegdefrau 1937
- 'Calcigonellum belongs to Dinophyceae'
- 'Calcigonellum unfula belongs to Calcigonellum' according to Deflandre 1948
- 'Calciodinellum belongs to Dinoflagellata'
- 'Calciodinellum operosum belongs to Calciodinellum' according to Deflandre 1947
- 'Calciogranellum belongs to Dinophyceae'
- 'Calciogranellum limbatum belongs to Calciogranellum' according to Deflandre 1948
- 'Calciphyton belongs to Problematica'
- 'Calciphyton praecambri belongs to Calciphyton' according to Kusta 1892
- 'Calcipterellum belongs to Dinophyceae'
- 'Calcipterellum colomi belongs to Calcipterellum' according to Deflandre 1948
- 'Calcisphaera belongs to Problematica'
- 'Calcisphaera laevis belongs to Calcisphaera' according to Williamson 1880
- 'Calcisphaerellum belongs to Dinophyceae'
- 'Calcisphaerellum flosculus belongs to Calcisphaerellum' according to Deflandre 1948
- 'Calevia belongs to Cyanobacteria'
- 'Calevia olenica belongs to Calevia' according to Butin 1959
- 'Caliptrosphaerites belongs to Coccolithophorales'
- 'Caliptrosphaerites rionii belongs to Caliptrosphaerites' according to Maslov 1956
- 'Calleophyllum belongs to Plantae'
- 'Calleophyllum lobatum belongs to Calleophyllum' according to Zalessky 1939
- 'Calligonopsis belongs to Magnoliopsida'
- 'Callimothallus belongs to Microthyriaceae'
- 'Callimothallus pertusus belongs to Callimothallus' according to Dilcher 1965
- 'Callipitys belongs to Coniferales'
- 'Callipitys leptoderma belongs to Callipitys' according to Harris 1935
- 'Callipterianthus belongs to Pteridospermophyta'
- 'Callipterianthus arnhardtii belongs to Callipterianthus' according to Roselt 1962
- 'Callipteridium gothani belongs to Callipteridium' according to Krestew 1928
- 'Callipteridium gothani is recombined as Aenigmatophyllum gothani' according to Hartung and Gothan 1939
- 'Callipteridium sullivanti belongs to Callipteridium' according to Lesquereux 1870
- 'Callipteridium unitum belongs to Callipteridium' according to Fontaine and White 1880
- 'Callipteris discreta belongs to Callipteris' according to Weiss 1870
- 'Callipteris discreta is recombined as Pseudocallipteris discreta' according to Grand'Eury 1877
- 'Callisphenus belongs to Dasycladaceae'
- 'Callisphenus gracilis belongs to Callisphenus' according to Høeg 1938
- 'Callistemophyllum belongs to Myrtaceae'
- 'Callistemophyllum verum belongs to Callistemophyllum' according to Ettingshausen 1853
- 'Callistophyton belongs to Pteridospermophyta'
- 'Callistophyton poroxyloides belongs to Callistophyton' according to Delevoryas and Morgan 1954
- 'Callithamnopsis belongs to Plantae'
- 'Callithamnopsis fruticosa belongs to Callithamnopsis' according to Hall 1894
- 'Callitrites belongs to Coniferophyta'
- 'Callitrites brongniartii belongs to Callitrites' according to Endlicher 1847
- 'Callitroxylon belongs to Plantae'
- 'Callixylon belongs to Cordaitales'
- 'Callixylon trifilievi belongs to Callixylon' according to Zalessky 1911
- 'Callorites belongs to Plantae'
- 'Callorites delorenzoi belongs to Callorites' according to Fiore 1931
- 'Callospermarion belongs to Pteridospermophyta'
- 'Callospermarion pussillum belongs to Callospermarion' according to Eggert and Delevoryas 1960
- 'Calloxylon belongs to Coniferophyta'
- 'Calloxylon hartigii belongs to Calloxylon' according to Andrae 1848
- 'Calophylloxylon belongs to Guttiferae'
- 'Calophylloxylon indicum belongs to Calophylloxylon' according to Lakhanpal and Awasthi 1965
- 'Calopteris belongs to Plantae'
- 'Calopteris dubia belongs to Calopteris' according to Corda 1845
- 'Calothricites belongs to Cyanobacteria'
- 'Calothricites alexinatzia belongs to Calothricites' according to Bertrand 1913
- 'Calvarinus belongs to Boraginaceae'
- 'Calvarinus reticulatus belongs to Calvarinus' according to Reid and Reid 1910
- 'Calycites lythroides belongs to Calycites' according to Visiani and Massalongo 1856
- 'Calycites pentasepalus belongs to Calycites' according to Massalongo 1850
- 'Calycithes is replaced by Calycites' according to Massalongo 1856
- 'Calycocarpus belongs to Cupressaceae'
- 'Calycocarpus thujoides belongs to Calycocarpus' according to Goeppert 1850
- 'Calycophysoides belongs to Plantae'
- 'Calycophysoides balli belongs to Calycophysoides' according to Berry 1924
- 'Calymmatotheca belongs to Pteridospermophyta'
- 'Calymmatotheca kidstoni belongs to Calymmatotheca' according to Calder 1938
- 'Calymmatotheca kidstoni is recombined as Genomosperma kidstoni' according to Long 1960
- 'Calymmatotheca stangeri belongs to Calymmatotheca' according to Stur 1877
- 'Calyptophycus belongs to Cyanobacteria'
- 'Calyptophycus verrucius belongs to Calyptophycus' according to Johnson 1940
- 'Camasia belongs to Cyanobacteria'
- 'Camasia spongiosa belongs to Camasia' according to Walcott 1914
- 'Cambroporella belongs to Dasycladaceae'
- 'Cambroporella tuvensis belongs to Cambroporella' according to Korde 1950
- 'Cambrostroma belongs to Plantae'
- 'Cambrostroma rossicum belongs to Cambrostroma' according to Vlasov 1961
- 'Campanulospermum belongs to Plantae'
- 'Campanulospermum winterslagense belongs to Campanulospermum' according to Stockmans and Williere 1961
- 'Campoxylon belongs to Plantae'
- 'Campteroneura is a nomen nudum'
- 'Camptophyllum belongs to Plantae'
- 'Camptophyllum schimperi belongs to Camptophyllum' according to Nathorst 1875
- 'Camptopteris belongs to Plantae'
- 'Camptopteris muensteriana belongs to Camptopteris' according to Presl 1838
- 'Camptosperma belongs to Pteridospermophyta'
- 'Camptosperma berniciense belongs to Camptosperma' according to Long 1961
- 'Campylophyllum belongs to Cycadophyta'
- 'Campylophyllum hormanni belongs to Campylophyllum' according to Gothan 1914
- 'Campylospermum belongs to Araceae'
- 'Campylospermum hordwellensis belongs to Campylospermum' according to Chandler 1925
- 'Cancellophycus belongs to Plantae'
- 'Cancellophycus liasinus belongs to Cancellophycus' according to Saporta 1872
- 'Cancellus is replaced by Palaeocancellus' according to Derville 1952
- 'Cancellus robustus belongs to Cancellus' according to Derville 1950
- 'Cancellus robustus is recombined as Palaeocancellus robustus' according to Derville 1952
- 'Canningia belongs to Dinoflagellata'
- 'Canninginopsis belongs to Problematica'
- 'Cannophyllites belongs to Plantae'
- 'Cannophyllites septentrionalis belongs to Cannophyllites' according to Nilsson 1832
- 'Cannophyllites virletii belongs to Cannophyllites' according to Brongniart 1828
- 'Cannosphaeropsis belongs to Dinophyceae'
- 'Cantheliophorus belongs to Lycopodophyta'
- 'Cantheliophorus linearifolius belongs to Cantheliophorus' according to Lesquereux 1919
- 'Canthidium belongs to Rubiaceae'
- 'Canthidium radobojanum belongs to Canthidium' according to Unger 1850
- 'Cantia belongs to Angiospermae'
- 'Cantia arborescens belongs to Cantia' according to Stopes 1915
- 'Canticarpum belongs to Celastraceae'
- 'Canticarpum celastroides belongs to Canticarpum' according to Reid and Chandler 1933
- 'Canticarya belongs to Rutaceae'
- 'Canticarya sheppeyensis belongs to Canticarya' according to Reid and Chandler 1933
- 'Canticocculus belongs to Menispermaceae'
- 'Cantisolanum belongs to Solanaceae'
- 'Cantisolanum daturoides belongs to Cantisolanum' according to Reid and Chandler 1933
- 'Cantitilia belongs to Tiliaceae'
- 'Cantitilia polysperma belongs to Cantitilia' according to Reid and Chandler 1933
- 'Cantulodinium belongs to Dinophyceae'
- 'Cantulodinium speciosum belongs to Cantulodinium' according to Alberti 1961
- 'Capparidispermum belongs to Capparidaceae'
- 'Capparidispermum boveyanum belongs to Capparidispermum' according to Chandler 1957
- 'Capparidium belongs to Plantae'
- 'Capparidocarpus belongs to Capparidaceae'
- 'Capparidocarpus sphericas belongs to Capparidocarpus' according to Berry 1924
- 'Capparidoxylon belongs to Plantae'
- 'Capparidoxylon geinitzi belongs to Capparidoxylon' according to Schenk 1883
- 'Capparites belongs to Capparidaceae'
- 'Capparites cynophylloides belongs to Capparites' according to Berry 1919
- 'Capsulites belongs to Plantae'
- 'Capsulites gondwanensis belongs to Capsulites' according to Saksena 1958
- 'Capsulocarpus belongs to Bignoniaceae'
- 'Capsulocarpus dakotensis belongs to Capsulocarpus' according to Berry 1939
- 'Caracuboxylon belongs to Cordaitales'
- 'Caracuboxylon bakhasuense belongs to Caracuboxylon' according to Zalessky 1930
- 'Caragandites belongs to Lycopodophyta'
- 'Caragandites rugosus belongs to Caragandites' according to Zalessky 1933
- 'Carapoxylon belongs to Meliaceae'
- 'Carapoxylon fasciatum belongs to Carapoxylon' according to Maedel 1960
- 'Caratchetopteris is a nomen nudum'
- 'Carbonacarpa belongs to Plantae'
- 'Cardiocarpales belongs to Plantae'
- 'Cardiocarpon is replaced by Cardiocarpus' according to Brongniart 1881
- 'Cardiocarpus belongs to Cardiocarpales'
- 'Cardioglossum belongs to Plantae'
- 'Cardioneura belongs to Spermatophytata'
- 'Cardioneura amadoca belongs to Cardioneura' according to Zalessky 1934
- 'Cardiopteridium belongs to Pteridophyta'
- 'Cardiopteridium spitsbergense belongs to Cardiopteridium' according to Nathorst 1914
- 'Caricoideae belongs to Cyperaceae'
- 'Caricopsis belongs to Plantae'
- 'Caricopsis laxa belongs to Caricopsis' according to Samylina 1960
- 'Carnoconites belongs to Plantae'
- 'Carnoconites compactum belongs to Carnoconites' according to Srivastava 1944
- 'Carolites belongs to Angiospermae'
- 'Carolites patagonica belongs to Carolites' according to Spegazzini 1924
- 'Carolopteris belongs to Pteridophyta'
- 'Carolopteris aquensis belongs to Carolopteris' according to Debey and Ettingshausen 1859
- 'Carpannularia belongs to Sphenopsida'
- 'Carpannularia americana belongs to Carpannularia' according to Elias 1931
- 'Carpantholithes belongs to Angiospermae'
- 'Carpantholithes berendtii belongs to Carpantholithes' according to Goeppert 1838
- 'Carpenterella belongs to Dasycladaceae'
- 'Carpenterella jonesi belongs to Carpenterella' according to Morellet and Morellet 1922
- 'Carpenterianthus belongs to Hydrangeaceae'
- 'Carpenterianthus turgaicus belongs to Carpenterianthus' according to Borsuk 1935
- 'Carpentieria belongs to Plantae'
- 'Carpentieria marocana belongs to Carpentieria' according to Nemejc and Augusta 1934
- 'Carpinicarpus belongs to Betulaceae'
- 'Carpinicarpus longistylus belongs to Carpinicarpus' according to Nikitin 1965
- 'Carpiniphyllum belongs to Angiospermae'
- 'Carpiniphyllum pyramidale belongs to Carpiniphyllum' according to Goeppert 1888
- 'Carpinites belongs to Fagaceae'
- 'Carpinites dubius belongs to Carpinites' according to Goeppert and Berendt 1845
- 'Carpinoxylon belongs to Plantae'
- 'Carpinoxylon compactum belongs to Carpinoxylon' according to Vater 1884
- 'Carpinoxylon vasculosum belongs to Carpinoxylon' according to Felix 1887
- 'Carpinoxylon vasculosum is recombined as Eucarpinoxylon vasculosum' according to Mueller-Stoll and Maedel 1959
- 'Carpites belongs to Plantae'
- 'Carpodium belongs to Gymnospermae'
- 'Carpolithes conicus belongs to Carpolithes' according to Lindley and Hutton 1836
- 'Carpolithes conicus is recombined as Ulospermum conicum' according to Pomel 1849
- 'Carpolithes cordai belongs to Carpolithes' according to Geinitz 1855
- 'Carpolithes cordai is recombined as Cordaicarpon cordai' according to Geinitz 1862
- 'Carpolithes exaratus is recombined as Rutaspermum exaratum' according to Chandler 1957
- 'Carpolithes exaratus belongs to Carpolithes' according to Heer 1862
- 'Carpolithes nitens belongs to Carpolithes' according to Heer 1862
- 'Carpolithes orobiformis belongs to Carpolithes' according to Schlotheim 1820
- 'Carpolithes orobiformis is recombined as Algacites orobiformis' according to Schlotheim 1822
- 'Carpolithes pruniformis belongs to Carpolithes' according to Heer 1859
- 'Carpolithes pruniformis is recombined as Carpites pruniformis' according to Schimper 1874
- 'Carpolithes thalictroides belongs to Carpolithes' according to Brongniart 1822
- 'Carpolithes thalictroides is recombined as Potamocarpites thalictroides' according to Ettingshausen 1852
- 'Carradorites belongs to Plantae'
- 'Caryojuglandoxylon belongs to Juglandaceae'
- 'Caryojuglans belongs to Juglandaceae'
- 'Caryojuglans quadrangula belongs to Caryojuglans' according to Kirchheimer 1936
- 'Caryotispermum belongs to Palmae'
- 'Caryotispermum cantiense belongs to Caryotispermum' according to Reid and Chandler 1933
- 'Casea belongs to Neuropteridae'
- 'Casea membranacea belongs to Casea' according to Newberry 1853
- 'Caseariaephyllum belongs to Flacourtiaceae'
- 'Caseariaephyllum kraeuseli belongs to Caseariaephyllum' according to Rasky 1960
- 'Cassiophyllum belongs to Plantae'
- 'Cassioxylon belongs to Plantae'
- 'Cassioxylon anomalum belongs to Cassioxylon' according to Felix 1882
- 'Castaliites belongs to Nymphaeaceae'
- 'Castaliites ordinarius belongs to Castaliites' according to Hollick 1930
- 'Castanoxylon belongs to Magnoliopsida'
- 'Castanoxylon indicum belongs to Castanoxylon' according to Navale 1964
- 'Castellinia belongs to Plantae'
- 'Castellinia macrocarpa belongs to Castellinia' according to Massalongo 1852
- 'Casuarina strumphsioides belongs to Casuarina' according to Massalongo 1857
- 'Casuarina strumphsioides is recombined as Calligonopsis strumphsioides' according to Massalongo 1859
- 'Casuarinites is replaced by Schlotheimia' according to Sternberg 1822
- 'Casuarinites belongs to Casuarinaceae'
- 'Casuarinites equisetiformis is replaced by Schlotheimia arborescens' according to Sternberg 1822
- 'Casuarinites equisetiformis belongs to Casuarinites' according to Schlotheim 1820
- 'Casuarinites jugleri belongs to Casuarinites' according to Goeppert and Stache 1855
- 'Casuaroxylon belongs to Casuarinaceae'
- 'Casuaroxylon anglia belongs to Casuaroxylon' according to Goeppert and Stache 1855
- 'Catellaria belongs to Dasycladaceae'
- 'Catellaria ambia belongs to Catellaria' according to Maslov 1955
- 'Catena belongs to Dasycladaceae'
- 'Catena friata belongs to Catena' according to Maslov 1956
- 'Catenaria belongs to Plantae'
- 'Catenaria decora belongs to Catenaria' according to Sternberg 1825
- 'Cateniphycus belongs to Plantae'
- 'Cathaysiopteris belongs to Plantae'
- 'Cathispermum belongs to Celastraceae'
- 'Cathispermum pulchrum belongs to Cathispermum' according to Reid and Chandler 1933
- 'Catillochara belongs to Charophyta'
- 'Catillochara moreyi belongs to Catillochara' according to Peck 1963
- 'Caudaephyllum belongs to Calamitales'
- 'Caudaephyllum longifolium belongs to Caudaephyllum' according to Achepohl 1883
- 'Caudex belongs to Plantae'
- 'Caudomorpha belongs to Problematica'
- 'Caudomorpha cataphracta belongs to Caudomorpha' according to Vologdin 1962
- 'Caulerpides belongs to Plantae'
- 'Caulerpites eseri belongs to Caulerpites' according to Unger 1850
- 'Caulerpites eseri is recombined as Carradorites eseri' according to Massalongo 1859
- 'Caulerpites marginatus belongs to Caulerpites' according to Lesquereux 1869
- 'Caulerpites marginatus is recombined as Physophycus marginatus' according to Schimper 1869
- 'Caulerpites pteroides belongs to Caulerpites' according to Sternberg 1833
- 'Caulerpites pteroides is recombined as Cycadophycos pteroides' according to Massalongo 1859
- 'Caulerpites pyramidalis belongs to Caulerpites' according to Sternberg 1833
- 'Caulerpites pyramidalis is recombined as Caulerpides pyramidalis' according to Schimper 1869
- 'Caulomatites is a nomen nudum'
- 'Caulomorpha belongs to Plantae'
- 'Caulomorpha locardi belongs to Caulomorpha' according to Saporta 1886
- 'Caulopsis belongs to Plantae'
- 'Caulopsis punctata belongs to Caulopsis' according to Gothan and Hartung 1949
- 'Caulopteris primaeva belongs to Caulopteris' according to Lindley and Hutton 1832
- 'Caulopteris tessellata is recombined as Lepidodendrites tessellata' according to Fliche 1906
- 'Caulopteris tessellata belongs to Caulopteris' according to Schimper and Mougeot 1844
- 'Caulopteris tessellata is recombined as Cyatheopteris tessellata' according to Schimper 1869
- 'Caulopteris voltzii belongs to Caulopteris' according to Schimper and Mougeot 1844
- 'Caulopteris voltzii is recombined as Chelepteris voltzii' according to Corda 1845
- 'Cauloxylon belongs to Cordaitales'
- 'Cauloxylon ambiguum belongs to Cauloxylon' according to Cribbs 1939
- 'Caxtonia belongs to Rutaceae'
- 'Caxtonia glandulosa belongs to Caxtonia' according to Reid and Chandler 1933
- 'Caytonanthus belongs to Caytoniales'
- 'Caytonia belongs to Caytoniales'
- 'Caytonia sewardi belongs to Caytonia' according to Thomas 1925
- 'Cedrelophyllum belongs to Meliaceae'
- 'Cedrelophyllum antiqua belongs to Cedrelophyllum' according to Deane 1902
- 'Cedrelospermites belongs to Angiospermae'
- 'Cedrelospermites venulosus belongs to Cedrelospermites' according to Saporta 1894
- 'Cedrelospermum belongs to Meliaceae'
- 'Cedrelospermum aquense belongs to Cedrelospermum' according to Saporta 1889
- 'Cedrites belongs to Plantae'
- 'Cedrites primevus belongs to Cedrites' according to Brown 1935
- 'Cedrophloios belongs to Coniferophyta'
- 'Cedrophloios breicheri belongs to Cedrophloios' according to Fliche 1896
- 'Cedrostrobus belongs to Coniferales'
- 'Cedrostrobus leckenbyi belongs to Cedrostrobus' according to Carruthers 1915
- 'Cedroxylon belongs to Plantae'
- 'Cedroxylon blevillense belongs to Cedroxylon' according to Lignier 1907
- 'Cedroxylon blevillense is recombined as Protopodocarpoxylon blevillense' according to Eckhold 1922
- 'Cedroxylon maidstonense belongs to Cedroxylon' according to Stopes 1915
- 'Cedroxylon maidstonense is recombined as Protojuniperoxylon maidstonense' according to Eckhold 1922
- 'Celastrinanthium belongs to Celastraceae'
- 'Celastrinanthium hauchecornei belongs to Celastrinanthium' according to Conwentz 1886
- 'Celastrinites belongs to Celastraceae'
- 'Celastrinites venulosus belongs to Celastrinites' according to Saporta 1865
- 'Celastrinoxylon is a nomen nudum'
- 'Celastrocarpus belongs to Celastraceae'
- 'Celastrocarpus eocenicus belongs to Celastrocarpus' according to Berry 1930
- 'Celastrophyllum belongs to Celastraceae'
- 'Celastrophyllum attenuatum belongs to Celastrophyllum' according to Goeppert 1854
- 'Cellulasclerotes belongs to Fungi'
- 'Cellulasclerotes cubicularius belongs to Cellulasclerotes' according to Stach and Pickhardt 1957
- 'Celluloxylon belongs to Plantae'
- 'Celluloxylon primaevum belongs to Celluloxylon' according to Dawson 1881
- 'Celtidophyllum belongs to Ulmaceae'
- 'Celtidophyllum praeaustrale belongs to Celtidophyllum' according to Krasser 1896
- 'Celtitis belongs to Plantae'
- 'Celtitis kleinii belongs to Celtitis' according to Tuzson 1909
- 'Celtoidanthus belongs to Ulmaceae'
- 'Celtoidanthus pseudorobustus belongs to Celtoidanthus' according to Weyland et al. 1958
- 'Celyphinia belongs to Plantae'
- 'Celyphinia mccoyi belongs to Celyphinia' according to Mueller 1871
- 'Cenangites belongs to Fungi'
- 'Cenangites piri belongs to Cenangites' according to Ludwig 1892
- 'Centroplacophyllum belongs to Flacourtiaceae'
- 'Centroplacophyllum palaeoglaucinum belongs to Centroplacophyllum' according to Rasky 1965
- 'Cephalopteris belongs to Pteridospermophyta'
- 'Cephalopteris mirabilis belongs to Cephalopteris' according to Nathorst 1914
- 'Cephalotaxites belongs to Coniferales'
- 'Cephalotaxites insignis belongs to Cephalotaxites' according to Heer 1883
- 'Cephalotaxopsis belongs to Coniferales'
- 'Cephalotaxopsis magnifolia belongs to Cephalotaxopsis' according to Fontaine 1889
- 'Cephalotaxospermum belongs to Taxaceae'
- 'Cephalotaxospermum carolinianum belongs to Cephalotaxospermum' according to Berry 1910
- 'Cephalotheca belongs to Pteridophyta'
- 'Cephalotheca mirabilis belongs to Cephalotheca' according to Nathorst 1902
- 'Ceramites belongs to Plantae'
- 'Ceramites belongs to Plantae'
- 'Ceramites hisingeri belongs to Ceramites' according to Keilhau 1845
- 'Ceratocarpus belongs to Magnoliophyta'
- 'Ceratocarpus fendrychi belongs to Ceratocarpus' according to Velenovsky and Viniklar 1931
- 'Ceratocystidiopsis belongs to Acritarcha'
- 'Ceratocystidiopsis simplex belongs to Ceratocystidiopsis' according to Deflandre 1937
- 'Ceratoniophyllum belongs to Plantae'
- 'Ceratoniophyllum schottleri belongs to Ceratoniophyllum' according to Kirchheimer 1930
- 'Ceratophycus belongs to Plantae'
- 'Ceratophycus bicornis belongs to Ceratophycus' according to Schimper 1879
- 'Ceratophyllites belongs to Sphenopsida'
- 'Ceratostrobus belongs to Coniferophyta'
- 'Ceratostrobus sequoiaephyllus belongs to Ceratostrobus' according to Velenovsky 1885
- 'Ceratoxylon belongs to Coniferales'
- 'Ceratoxylon laterale belongs to Ceratoxylon' according to Velenovsky and Viniklar 1931
- 'Ceratozamites belongs to Plantae'
- 'Ceratozamites vicetinus belongs to Ceratozamites' according to Meschinelli 1889
- 'Cercidoxylon belongs to Angiospermae'
- 'Cercidoxylon zirkeli belongs to Cercidoxylon' according to Platen 1908
- 'Cercosporites belongs to Demaliaceae'
- 'Cercosporites belongs to Hyphomycetes'
- 'Cercosporites coriococcus belongs to Cercosporites' according to Bayer 1913
- 'Chabakovia belongs to Problematica'
- 'Chabakovia ramosa belongs to Chabakovia' according to Vologdin 1939
- 'Chacassopteris belongs to Coenopteridales'
- 'Chacassopteris concinna belongs to Chacassopteris' according to Radchenko 1960
- 'Chaetangiaceae belongs to Nemaliales'
- 'Chaethomites belongs to Fungi'
- 'Chaethomites intricatus belongs to Chaethomites' according to Pampaloni 1902
- 'Chaetocladus belongs to Dasycladales'
- 'Chaetocladus plumula belongs to Chaetocladus' according to Whitfield 1894
- 'Chaetophorites belongs to Plantae'
- 'Chaetophorites tertiarius belongs to Chaetophorites' according to Fliche 1886
- 'Chaetosphaerites belongs to Fungi'
- 'Chaetosphaerites bilychnis belongs to Chaetosphaerites' according to Felix 1894
- 'Chakassiophyton belongs to Plantae'
- 'Chakassiophyton krasnovii belongs to Chakassiophyton' according to Ananiev and Krasnov 1962
- 'Chamaecyparioxylon belongs to Cupressaceae'
- 'Chamaecyparioxylon polonicum belongs to Chamaecyparioxylon' according to Krausel 1958
- 'Chamaecyparites belongs to Plantae'
- 'Chandlera belongs to Menispermaceae'
- 'Chandlera lacunosa belongs to Chandlera' according to Scott 1954
- 'Changarniera belongs to Plantae'
- 'Changarniera inquirenda belongs to Changarniera' according to Saporta 1885
- 'Changyanophyton belongs to Plantae'
- 'Changyanophyton hupeiense belongs to Changyanophyton' according to Sze 1952
- 'Chankanella belongs to Plantae'
- 'Chankanella vachrameivi belongs to Chankanella' according to Krasilov 1964
- 'Chansitheca belongs to Pteridophyta'
- 'Chansitheca palaeosilvana belongs to Chansitheca' according to Rege 1920
- 'Chara andreanszkyi belongs to Chara' according to Rasky 1945
- 'Chara andreanszkyi is recombined as Kosmogyrina andreanszkyi' according to Maedler 1953
- 'Chara compressa belongs to Chara' according to Knowlton 1888
- 'Chara compressa is recombined as Platychara compressa' according to Grambast 1962
- 'Chara distorta belongs to Chara' according to Reid and Groves 1921
- 'Chara distorta is recombined as Grovesichara distorta' according to Horn af Rantzien 1959
- 'Chara escheri belongs to Chara' according to Unger 1850
- 'Chara escheri is recombined as Croftiella escheri' according to Horn af Rantzien 1959
- 'Chara hirmeri belongs to Chara' according to Rasky 1945
- 'Chara hirmeri is recombined as Sphaerochara hirmeri' according to Maedler 1952
- 'Chara langeri belongs to Chara' according to Ettingshausen 1872
- 'Chara langeri is recombined as Rhabdochara langeri' according to Maedler 1955
- 'Chara meriani belongs to Chara' according to Braun 1850
- 'Chara meriani is recombined as Tectochara meriani' according to Grambast and Grambast 1954
- 'Chara monolifera belongs to Chara' according to Peck and Reker 1947
- 'Chara monolifera is recombined as Maedleriella monolifera' according to Grambast 1957
- 'Chara tornata belongs to Chara' according to Reid and Groves 1921
- 'Chara tornata is recombined as Grambastichara tornata' according to Horn af Rantzien 1959
- 'Chara vasiformis belongs to Chara' according to Reid and Groves 1921
- 'Chara vasiformis is recombined as Harrisichara vasiformis' according to Grambast 1957
- 'Chara verticillata belongs to Chara' according to Peck 1937
- 'Chara verticillata is recombined as Sphaerochara verticillata' according to Peck 1957
- 'Chara verticillata is recombined as Peckisphaera verticillata' according to Grambast 1962
- 'Characeites belongs to Charophyta'
- 'Characeites verrucosa belongs to Characeites' according to Tuzson 1914
- 'Charaussaia belongs to Problematica'
- 'Charaussaia camptotaenia belongs to Charaussaia' according to Vologdin 1940
- 'Charaxis belongs to Characeae'
- 'Charaxis durlstonense belongs to Charaxis' according to Harris 1939
- 'Charites belongs to Charophyta'
- 'Charites molassica belongs to Charites' according to Straub 1959
- 'Charnelia belongs to Sphenopteridae'
- 'Charnelia dichotoma belongs to Charnelia' according to Frenguelli 1954
- 'Charpentieria belongs to Plantae'
- 'Charpentieria nivium belongs to Charpentieria' according to Unger 1845
- 'Chasmatopteris belongs to Osmundaceae'
- 'Chasmatopteris principalis belongs to Chasmatopteris' according to Zalessky 1931
- 'Chauvinia belongs to Plantae'
- 'Chauviniopsis belongs to Plantae'
- 'Chauviniopsis pellati belongs to Chauviniopsis' according to Saporta 1872
- 'Cheilanthites belongs to Sphenopteridae'
- 'Cheiloleptites is a nomen nudum'
- 'Cheirolepidium belongs to Plantae'
- 'Cheirolepidium muensteri belongs to Cheirolepidium' according to Schenk 1956
- 'Cheirolepis belongs to Coniferophyta'
- 'Cheirostrobus belongs to Coniferophyta'
- 'Cheirostrobus pettycurensis belongs to Cheirostrobus' according to Scott 1897
- 'Chelepteris belongs to Pteridopsida'
- 'Chenopodites belongs to Chenopodiaceae'
- 'Chenopodites helicoides belongs to Chenopodites' according to Saporta 1889
- 'Chinlea belongs to Osmundaceae'
- 'Chinlea campii belongs to Chinlea' according to Daugherty 1941
- 'Chiropteridium belongs to Dinophyceae'
- 'Chiropteridium lobospinosum belongs to Chiropteridium' according to Gocht 1960
- 'Chiropteris digitata belongs to Chiropteris' according to Kurr 1858
- 'Chitospermum belongs to Plantae'
- 'Chitospermum stereococcus belongs to Chitospermum' according to Harris 1935
- 'Chlamidostachys belongs to Equisetopsida'
- 'Chlamidostachys chesterianus belongs to Chlamidostachys' according to White 1937
- 'Chlamydocarpus belongs to Plantae'
- 'Chlamydocarpus palmaeformis belongs to Chlamydocarpus' according to Goeppert 1864
- 'Chloephycus belongs to Plantae'
- 'Chloephycus plumosum belongs to Chloephycus' according to Miller and Dyer 1878
- 'Chlorellopsis belongs to Plantae'
- 'Chlorellopsis coloniata belongs to Chlorellopsis' according to Reis 1923
- 'Chlorotylites belongs to Chlorophyceae'
- 'Chlorotylites berryi belongs to Chlorotylites' according to Howe 1932
- 'Choffatia belongs to Pteridopsida'
- 'Choffatia francheti belongs to Choffatia' according to Saporta 1894
- 'Chondrides furatus belongs to Chondrides' according to Brongniart 1869
- 'Chondrites lumbricarius belongs to Chondrites' according to Muenster 1843
- 'Chondrites lumbricarius is recombined as Phyllothallus lumbricarius' according to Rothpletz 1896
- 'Chondrites penicillatus is recombined as Ptilotites penicillatus' according to Massalongo and Scarabelli 1859
- 'Chondrites penicillatus belongs to Chondrites' according to Kurr 1845
- 'Chondrites rigidus belongs to Chondrites' according to Massalongo 1851
- 'Chondrites rigidus is recombined as Palaeochara rigida' according to Massalongo 1851
- 'Chondrophyton belongs to Angiospermae'
- 'Chondrophyton dissectum belongs to Chondrophyton' according to Saporta and Marion 1885
- 'Chondropogon belongs to Problematica'
- 'Chondropogon morosolense belongs to Chondropogon' according to Squinabol 1890
- 'Chonesphaera belongs to Dinoflagellata'
- 'Chonesphaera incerta belongs to Chonesphaera' according to Klumpp 1953
- 'Chordites belongs to Phaeophyceae'
- 'Chordites lebruni belongs to Chordites' according to Fliche 1905
- 'Chordophyllites belongs to Plantae'
- 'Chordophyllites cicatricosus belongs to Chordophyllites' according to Tate 1876
- 'Chorionopteris belongs to Pteridophyta'
- 'Chorionopteris gleichenioides belongs to Chorionopteris' according to Corda 1845
- 'Chotecella belongs to Plantae'
- 'Chotecella leeotheca belongs to Chotecella' according to Obrhel 1964
- 'Chovanella belongs to Charophyta'
- 'Chovanella kovalevi belongs to Chovanella' according to Reitlinger and Jarzewa 1958
- 'Chroococcaceae belongs to Cyanobacteria'
- 'Chroococcites belongs to Plantae'
- 'Chrysodiopteris belongs to Pteridophyta'
- 'Chrysodiopteris marchantiaeformis belongs to Chrysodiopteris' according to Saporta 1894
- 'Chrysotheca belongs to Jungermanniales'
- 'Chrysotheca diskoensis belongs to Chrysotheca' according to Miner 1935
- 'Chuaria belongs to Problematica'
- 'Cibotiocaulis belongs to Cyatheaceae'
- 'Cibotiocaulis tateiwae belongs to Cibotiocaulis' according to Ogura 1927
- 'Cinchonidium belongs to Rubiaceae'
- 'Cinchonidium racemosum belongs to Cinchonidium' according to Unger 1850
- 'Cingularia belongs to Plantae'
- 'Cingularia typica belongs to Cingularia' according to Weiss 1871
- 'Cinnamomiphyllum belongs to Angiospermae'
- 'Cinnamomoides belongs to Plantae'
- 'Cinnamomoides newberryi belongs to Cinnamomoides' according to Berry 1925
- 'Cinnamomophyllum belongs to Plantae'
- 'Cinnamomophyllum scheuchzeri belongs to Cinnamomophyllum' according to Heer 1950
- 'Circidoxylon belongs to Plantae'
- 'Circidoxylon zirkeli belongs to Circidoxylon' according to Platen 1908
- 'Circoporoxylon belongs to Plantae'
- 'Circulisporites belongs to Acritarcha'
- 'Circulisporites parvus belongs to Circulisporites' according to de Jersey 1962
- 'Circulodinium belongs to Dinophyceae'
- 'Circulodinium hirtellum belongs to Circulodinium' according to Alberti 1961
- 'Cirrifera belongs to Acritarcha'
- 'Cirrifera unilateralis belongs to Cirrifera' according to Cookson and Eisenack 1960
- 'Cissites aceroides belongs to Cissites' according to Debey 1866
- 'Cissophyllum belongs to Vitaceae'
- 'Cissophyllum malvernicium belongs to Cissophyllum' according to Ettingshausen 1887
- 'Cistelites is a nomen nudum'
- 'Cistella belongs to Dictyopteridiopsida'
- 'Cistella stricta belongs to Cistella' according to Plumstead 1958
- 'Cistinocarpum belongs to Cistaceae'
- 'Cistinocarpum roemeri belongs to Cistinocarpum' according to Conwentz 1886
- 'Cistocarpum belongs to Cistaceae'
- 'Cistocarpum decemvalvulatum belongs to Cistocarpum' according to Menzel 1913
- 'Citrispermum belongs to Rutaceae'
- 'Citrispermum sheppeyense belongs to Citrispermum' according to Chandler 1961
- 'Cladiocarya belongs to Cyperaceae'
- 'Cladiocarya foveolata belongs to Cladiocarya' according to Reid and Chandler 1926
- 'Cladiscothallus belongs to Plantae'
- 'Cladiscothallus keppeni belongs to Cladiscothallus' according to Renault 1896
- 'Cladiscus belongs to Plantae'
- 'Cladiscus schnorrianus belongs to Cladiscus' according to Geinitz 1877
- 'Cladites belongs to Cordaitales'
- 'Cladites bracteatus belongs to Cladites' according to Scott 1930
- 'Cladocedroxylon belongs to Plantae'
- 'Cladocupressoxylon belongs to Coniferophyta'
- 'Cladocupressoxylon protolarix belongs to Cladocupressoxylon' according to Felix 1882
- 'Cladophlebidium belongs to Plantae'
- 'Cladophlebidium wongi belongs to Cladophlebidium' according to Sze 1931
- 'Cladophlebis reticulata belongs to Cladophlebis' according to Fontaine 1900
- 'Cladophlebis reticulata is recombined as Mesolonchopteris reticulata' according to Koidzumi 1936
- 'Cladophorites dubius belongs to Cladophorites' according to Reis 1923
- 'Cladosporites belongs to Fungi'
- 'Cladosporites bipartitus belongs to Cladosporites' according to Felix 1894
- 'Cladostrobus belongs to Plantae'
- 'Cladostrobus lutugini belongs to Cladostrobus' according to Zalessky 1918
- 'Cladotheca belongs to Osmundaceae'
- 'Cladotheca undans belongs to Cladotheca' according to Lindley and Hutton 1911
- 'Cladothricinium belongs to Bacteria'
- 'Cladothricinium pancratovi belongs to Cladothricinium' according to Zalessky 1915
- 'Cladothryx belongs to Bacteria'
- 'Cladothryx martyi belongs to Cladothryx' according to Renault 1899
- 'Cladoxylon mirabile belongs to Cladoxylon' according to Unger 1856
- 'Clasteria belongs to Plantae'
- 'Clasterosporites belongs to Dematiaceae'
- 'Clasterosporites eocaenicus belongs to Clasterosporites' according to Fritel and Viguier 1927
- 'Clathraria belongs to Sigillariaceae'
- 'Clathraria brardii belongs to Clathraria' according to Brongniart 1822
- 'Clathrolithus belongs to Coccolithophorales'
- 'Clathrolithus ellipticus belongs to Clathrolithus' according to Deflandre 1954
- 'Clathrophyllum belongs to Plantae'
- 'Clathrophyllum meriani belongs to Clathrophyllum' according to Brongniart 1862
- 'Clathropodium belongs to Cycadophyta'
- 'Clathropodium trigeri belongs to Clathropodium' according to Saporta 1873
- 'Clathropteris belongs to Pteridophyta'
- 'Clathropyxidella belongs to Chrysophyceae'
- 'Clathropyxidella similis belongs to Clathropyxidella' according to Deflandre 1938
- 'Clausenispermum belongs to Rutaceae'
- 'Clausenispermum dubium belongs to Clausenispermum' according to Reid and Chandler 1933
- 'Clausisphaera belongs to Problematica'
- 'Clausisphaera fissa belongs to Clausisphaera' according to Staplin 1962
- 'Clavaphysoporella belongs to Dasycladaceae'
- 'Clavaphysoporella faceta belongs to Clavaphysoporella' according to Endo 1958
- 'Clavaporella belongs to Dasycladaceae'
- 'Clavaporella calciformis belongs to Clavaporella' according to Kochansky and Herak 1960
- 'Clavascina belongs to Plantae'
- 'Clavascina orlovensis belongs to Clavascina' according to Benes 1961
- 'Clavator belongs to Charales'
- 'Clavator harrisi belongs to Clavator' according to Peck 1941
- 'Clavator harrisi is recombined as Flabellochara harrisi' according to Grambast 1959
- 'Clavator reidi belongs to Clavator' according to Groves 1924
- 'Clavatorites belongs to Charophyta'
- 'Clavatorites hoellvicensis belongs to Clavatorites' according to Horn af Rantzien 1954
- 'Clavijopsis belongs to Plantae'
- 'Clavijopsis staubi belongs to Clavijopsis' according to Schindehutte 1907
- 'Clementsiella belongs to Poales'
- 'Clementsiella laminarum belongs to Clementsiella' according to Cockerell 1942
- 'Clepsydropsis belongs to Coenopteridales'
- 'Clepsydropsis antiqua belongs to Clepsydropsis' according to Unger 1856
- 'Clethraecarpum belongs to Clethraceae'
- 'Clethraecarpum asepalum belongs to Clethraecarpum' according to Menzel 1913
- 'Clevea is a nomen nudum'
- 'Climaciophyton belongs to Plantae'
- 'Climaciophyton trifoliatum belongs to Climaciophyton' according to Steinmann and Elberskirch 1929
- 'Closteroxylon belongs to Plantae'
- 'Closteroxylon lindleyanum belongs to Closteroxylon' according to Hartig 1848
- 'Cloughtonia belongs to Cycadophyta'
- 'Cloughtonia rugosa belongs to Cloughtonia' according to Halle 1911
- 'Clusiaphyllum belongs to Guttiferae'
- 'Clusiaphyllum eocenicum belongs to Clusiaphyllum' according to Berry 1930
- 'Clwydia belongs to Lycopsida'
- 'Clwydia decussata belongs to Clwydia' according to Lacey 1962
- 'Clypeator belongs to Charophyta'
- 'Clypeina belongs to Dasycladaceae'
- 'Clypeina marginoporella belongs to Clypeina' according to Michelin 1845
- 'Coactilum belongs to Plantae'
- 'Coactilum straeleni belongs to Coactilum' according to Lecompte 1956
- 'Coccolobites belongs to Plantae'
- 'Coccolobites belongs to Polygonaceae'
- 'Coccolobites cretaceus belongs to Coccolobites' according to Berry 1916
- 'Coccolobites massalongiana belongs to Coccolobites' according to Visiani 1858
- 'Coccoplasmium belongs to Plantae'
- 'Cocculites is a nomen nudum'
- 'Cocculophyllum belongs to Menispermaceae'
- 'Cocculus cinnamomeus belongs to Cocculus' according to Velenovsky 1885
- 'Cocculus cinnamomeus is recombined as Cocculophyllum cinnamomeum' according to Velenovsky 1889
- 'Cochliocarpus belongs to Plantae'
- 'Cochliocarpus scorpiuroides belongs to Cochliocarpus' according to Visiani 1858
- 'Cocites belongs to Palmae'
- 'Cocoopsis belongs to Palmae'
- 'Cocoopsis zeilleri belongs to Cocoopsis' according to Fliche 1896
- 'Codites serpentinus belongs to Codites' according to Sternberg 1833
- 'Codonia belongs to Acritarcha'
- 'Codonia campanulata belongs to Codonia' according to Cookson and Eisenack 1960
- 'Codonia campanulata is recombined as Codoniella campanulata' according to Cookson and Eisenack 1961
- 'Codoniella belongs to Acritarcha'
- 'Codonophora belongs to Plantae'
- 'Codonophycus belongs to Plantae'
- 'Codonophycus austinii belongs to Codonophycus' according to Fenton and Fenton 1939
- 'Codonophyton belongs to Plantae'
- 'Codonospermum belongs to Plantae'
- 'Codonospermum anomalum belongs to Codonospermum' according to Brongniart 1874
- 'Codonotheca belongs to Pteridospermophyta'
- 'Codonotheca caduca belongs to Codonotheca' according to Sellards 1903
- 'Coelastraceae belongs to Chlorococcales'
- 'Coelenteratella belongs to Plantae'
- 'Coelenteratella antiqua belongs to Coelenteratella' according to Korde 1959
- 'Coelosphaeridium cyclocrinophilum belongs to Coelosphaeridium' according to Roemer 1885
- 'Coelosporella belongs to Dasycladaceae'
- 'Coelosporella wetheredii belongs to Coelosporella' according to Wood 1940
- 'Coenopteridales belongs to Pteridophyta'
- 'Colacites belongs to Plantae'
- 'Coleophyllites belongs to Calamitaceae'
- 'Collenella belongs to Plantae'
- 'Collenella guadalupensis belongs to Collenella' according to Johnson 1942
- 'Collenia belongs to Plantae'
- 'Collenia undosa belongs to Collenia' according to Walcott 1914
- 'Colombicarpum belongs to Anacardiaceae'
- 'Colombicarpum biloculare belongs to Colombicarpum' according to Reid 1933
- 'Colpodexylon belongs to Lycopodophyta'
- 'Colpodexylon deatsii belongs to Colpodexylon' according to Banks 1944
- 'Colpospermum belongs to Plantae'
- 'Colpospermum sulcatum belongs to Colpospermum' according to Renault 1890
- 'Colpoxylon belongs to Medullosaceae'
- 'Colpoxylon aeduense belongs to Colpoxylon' according to Brongniart 1849
- 'Columnaria belongs to Plantae'
- 'Columnaria intacta belongs to Columnaria' according to Sternberg 1825
- 'Colymbetes belongs to Cycadophyta'
- 'Colymbetes edwardsi belongs to Colymbetes' according to Stopes 1915
- 'Colymboxylon belongs to Plantae'
- 'Comasphaeridium belongs to Acritarcha'
- 'Comates belongs to Plantae'
- 'Combretacinium belongs to Combretaceae'
- 'Combretacinium quisqualoides belongs to Combretacinium' according to Felix 1894
- 'Combretanthites belongs to Combretaceae'
- 'Combretanthites eocenica belongs to Combretanthites' according to Berry 1913
- 'Combretiphyllum belongs to Moraceae'
- 'Combretiphyllum acuminatum belongs to Combretiphyllum' according to Menzel 1909
- 'Comephyllum belongs to Plantae'
- 'Comephyllum cristatum belongs to Comephyllum' according to Emmons 1857
- 'Cometodinium belongs to Dinophyceae'
- 'Cometodinium obscurum belongs to Cometodinium' according to Deflandre and Courteville 1939
- 'Comia belongs to Pteridophyta'
- 'Comia pereborensis belongs to Comia' according to Zalessky 1934
- 'Comipteridium belongs to Pteridophyta'
- 'Comipteridium dobroljubovae belongs to Comipteridium' according to Zalessky 1934
- 'Commelinacites belongs to Plantae'
- 'Commelinacites dichorisandroides belongs to Commelinacites' according to Caspary 1881
- 'Compsopteris belongs to Alethopteridae'
- 'Compsopteris adzvensis belongs to Compsopteris' according to Zalessky 1934
- 'Compsotesta belongs to Plantae'
- 'Compsotesta brongniarti belongs to Compsotesta' according to Bertrand 1909
- 'Compsoxylon belongs to Plantae'
- 'Compsoxylon monteverdei belongs to Compsoxylon' according to Zalessky 1927
- 'Comptoniopteris belongs to Polypodiaceae'
- 'Comptoniopteris cercalina belongs to Comptoniopteris' according to Saporta 1894
- 'Comptoniopteris provincialis belongs to Comptoniopteris' according to Marion 1890
- 'Comptoniphyllum belongs to Myricaceae'
- 'Comptoniphyllum naumanni belongs to Comptoniphyllum' according to Nathorst 1888
- 'Comptonites belongs to Plantae'
- 'Comptonites antiquus belongs to Comptonites' according to Nilsson 1837
- 'Comptospermum belongs to Plantae'
- 'Comptospermum jarense belongs to Comptospermum' according to Brongniart 1877
- 'Concentricystes belongs to Acritarcha'
- 'Concentricystes rubinus belongs to Concentricystes' according to Rossignol 1962
- 'Conchocaryon belongs to Plantae'
- 'Conchocaryon smithii belongs to Conchocaryon' according to Mueller 1879
- 'Conchophyllum belongs to Cordaitales'
- 'Conchophyllum richthofeni belongs to Conchophyllum' according to Schenk 1883
- 'Conchotheca belongs to Plantae'
- 'Conchotheca rotundata belongs to Conchotheca' according to Mueller 1873
- 'Conchyophycus belongs to Plantae'
- 'Conchyophycus marcignyanus belongs to Conchyophycus' according to Saporta 1872
- 'Concresceraria belongs to Plantae'
- 'Concresceraria subrotunda belongs to Concresceraria' according to Vologdin 1962
- 'Condrusia rumex belongs to Condrusia' according to Stockmans 1946
- 'Condylites belongs to Coniferophyta'
- 'Condylites squamatus belongs to Condylites' according to Thistleton-Dyer 1872
- 'Confervites belongs to Problematica'
- 'Confervites thoreaeformis belongs to Confervites' according to Brongniart 1828
- 'Confervoides belongs to Plantae'
- 'Confervoides arenaceus belongs to Confervoides' according to Jaeger 1827
- 'Coniferites belongs to Plantae'
- 'Coniferites lignitum belongs to Coniferites' according to Unger 1839
- 'Coniferites verticillatus belongs to Coniferites' according to Tata 1853
- 'Coniferocaulon belongs to Coniferales'
- 'Coniferocaulon colymbeaeforme belongs to Coniferocaulon' according to Fliche 1900
- 'Coniferomyelon belongs to Coniferales'
- 'Coniferomyelon conchylianum belongs to Coniferomyelon' according to Fliche 1908
- 'Coniferoxylon belongs to Coniferophyta'
- 'Coniferoxylon krausei belongs to Coniferoxylon' according to Felix 1945
- 'Conites belongs to Coniferales'
- 'Connaracanthium belongs to Connaraceae'
- 'Connaracanthium roureoides belongs to Connaracanthium' according to Conwentz 1886
- 'Connarophyllum is a nomen nudum'
- 'Conocarpites belongs to Combretaceae'
- 'Conocarpites formosus belongs to Conocarpites' according to Berry 1919
- 'Conophoroides belongs to Plantae'
- 'Conophoroides anthemis belongs to Conophoroides' according to Koenig 1825
- 'Conophoroides anthemis is recombined as Lepidostrobus anthemis' according to Kidston 1886
- 'Conophyton belongs to Problematica'
- 'Conophyton lituus belongs to Conophyton' according to Maslov 1937
- 'Conospermites belongs to Proteaceae'
- 'Conospermites hakeaefolius belongs to Conospermites' according to Ettingshausen 1867
- 'Conospermophyllum belongs to Plantae'
- 'Conospermophyllum hakeaefolium belongs to Conospermophyllum' according to Velenovsky 1889
- 'Conostichus ornatus belongs to Conostichus' according to Lesquereux 1876
- 'Conostoma belongs to Plantae'
- 'Conostoma oblonga belongs to Conostoma' according to Williamson 1876
- 'Constantinium belongs to Proteaceae'
- 'Constantinium proteoides belongs to Constantinium' according to Unger 1863
- 'Convallarites belongs to Plantae'
- 'Convallarites erecta belongs to Convallarites' according to Brongniart 1828
- 'Convolvulites belongs to Convolvulaceae'
- 'Convolvulites orichitus belongs to Convolvulites' according to MacGinitie 1953
- 'Cooksonia belongs to Psilophytales'
- 'Copiapaea belongs to Plantae'
- 'Copiapaea plicatella belongs to Copiapaea' according to Solms-Laubach 1899
- 'Copperia belongs to Plantae'
- 'Copperia tubiformis belongs to Copperia' according to Walcott 1914
- 'Coprosmaephyllum belongs to Magnoliopsida'
- 'Coprosmaephyllum ovatum belongs to Coprosmaephyllum' according to Deane 1904
- 'Coprosmites is a nomen nudum'
- 'Corallinites belongs to Plantae'
- 'Corallinites arbuscula belongs to Corallinites' according to Unger 1847
- 'Corallinites galaxacera belongs to Corallinites' according to Massalongo 1856
- 'Corallinites galaxacera is recombined as Lemanidium galaxacera' according to Massalongo 1859
- 'Corallinites tuna belongs to Corallinites' according to Massalongo 1856
- 'Corallinites tuna is recombined as Halimedopsis tuna' according to Massalongo 1859
- 'Coraphyton belongs to Plantae'
- 'Coraphyton problematicum belongs to Coraphyton' according to Steinmann and Elberskirch 1929
- 'Corbularia belongs to Plantae'
- 'Corbularia conglutinata belongs to Corbularia' according to Vologdin 1962
- 'Corchorites is a nomen nudum'
- 'Corchorites belongs to Tiliaceae'
- 'Corchorites crenulata belongs to Corchorites' according to Deane 1902
- 'Cordaianthopsis belongs to Cordaitales'
- 'Cordaianthopsis minieri belongs to Cordaianthopsis' according to Fliche 1910
- 'Cordaianthus belongs to Cordaitales'
- 'Cordaianthus gemmifer belongs to Cordaianthus' according to Grand'Eury 1877
- 'Cordaicladus belongs to Cordaitales'
- 'Cordaicladus subschnorrianus belongs to Cordaicladus' according to Grand'Eury 1877
- 'Cordaicortex belongs to Plantae'
- 'Cordaicortex iljinskiensis belongs to Cordaicortex' according to Sukhov 1959
- 'Cordaifloyos belongs to Cordaitales'
- 'Cordaiopsis belongs to Cordaitales'
- 'Cordaiopsis elliptica belongs to Cordaiopsis' according to Renault 1896
- 'Cordaiphloeum is a nomen nudum'
- 'Cordaispermum belongs to Cordaitales'
- 'Cordaispermum gutbieri belongs to Cordaispermum' according to Geinitz 1881
- 'Cordaistrobus belongs to Cordaitales'
- 'Cordaistrobus grandeuryi belongs to Cordaistrobus' according to Lesquereux 1878
- 'Cordaitanthus belongs to Cordaitales'
- 'Cordaitanthus communis belongs to Cordaitanthus' according to Feistmantel 1876
- 'Cordaites validus belongs to Cordaites' according to Cohen and Delevoryas 1959
- 'Cordaites validus is recombined as Pennsylvanioxylon validum' according to Vogellehner 1965
- 'Cordaixylon belongs to Plantae'
- 'Cordaixylon credneri belongs to Cordaixylon' according to Morgenroth 1883
- 'Cordosphaeridium belongs to Dinophyceae'
- 'Corematocladus belongs to Florideae'
- 'Corematocladus densa belongs to Corematocladus' according to Ruedemann 1909
- 'Cormaraucarioxylon belongs to Coniferophyta'
- 'Cormaraucarioxylon crasseradiatum belongs to Cormaraucarioxylon' according to Lignier 1907
- 'Cormocedroxylon belongs to Coniferophyta'
- 'Cormocedroxylon jurense belongs to Cormocedroxylon' according to Rouillier and Fahrenkohl 1882
- 'Cormocordaites belongs to Cordaitales'
- 'Cormocupressoxylon belongs to Coniferophyta'
- 'Cormocupressoxylon protolarix belongs to Cormocupressoxylon' according to Felix 1882
- 'Cornophyllum belongs to Cornaceae'
- 'Cornophyllum vetustum belongs to Cornophyllum' according to Newberry 1895
- 'Cornoxylon belongs to Plantae'
- 'Cornoxylon erraticum belongs to Cornoxylon' according to Conwentz 1882
- 'Cornucarpus belongs to Gymnospermophyta'
- 'Cornucarpus acutum belongs to Cornucarpus' according to Lindley and Hutton 1914
- 'Coronasclerotes belongs to Fungi'
- 'Coronasclerotes australis belongs to Coronasclerotes' according to Stach and Pickhardt 1957
- 'Coronifera belongs to Hystrichosphaeridea'
- 'Coronopsis belongs to Acritarcha'
- 'Coronopsis digitata belongs to Coronopsis' according to Wetzel 1961
- 'Coronostoma belongs to Plantae'
- 'Coronostoma quadrivasatum belongs to Coronostoma' according to Neely 1951
- 'Corticites belongs to Plantae'
- 'Corticites lenticellosus belongs to Corticites' according to Rossmassler 1840
- 'Corydalis pulchra belongs to Corydalis' according to Chandler 1925
- 'Corydalis pulchra is recombined as Hantsia pulchra' according to Chandler 1960
- 'Corydopodium belongs to Myxophyceae'
- 'Corydopodium pruvosti belongs to Corydopodium' according to Derville 1931
- 'Corylites belongs to Betulaceae'
- 'Corylites macquarrii belongs to Corylites' according to Forbes 1887
- 'Corylopsiphyllum belongs to Hamamelidaceae'
- 'Corylopsiphyllum groenlandicum belongs to Corylopsiphyllum' according to Koch 1963
- 'Corylopsites belongs to Hamamelidaceae'
- 'Corylopsites groenlandicus belongs to Corylopsites' according to Mathiesen 1932
- 'Corynecarpus is a nomen nudum'
- 'Corynepteris belongs to Zygopteridae'
- 'Corynepteris stellata belongs to Corynepteris' according to Baily 1860
- 'Corynophyllites belongs to Equisetales'
- 'Corynophyllites setiformis belongs to Corynophyllites' according to Zalessky 1937
- 'Coseleya belongs to Pteridospermophyta'
- 'Coseleya glomerata belongs to Coseleya' according to Kidston 1914
- 'Costarites is a nomen nudum'
- 'Cottaea belongs to Plantae'
- 'Cottaea danaeoides belongs to Cottaea' according to Goeppert 1836
- 'Cottaites belongs to Leguminosae'
- 'Cottaites lapidariorum is recombined as Ulmoxylon lapidariorum' according to Kaiser 1879
- 'Cottaites lapidariorum belongs to Cottaites' according to Unger 1842
- 'Cottaites robustior belongs to Cottaites' according to Unger 1842
- 'Cranmeria belongs to Lythraceae'
- 'Cranmeria trilocularis belongs to Cranmeria' according to Reid and Chandler 1933
- 'Craspedosperma belongs to Plantae'
- 'Craspedosperma bardacanum belongs to Craspedosperma' according to Zalessky 1937
- 'Crassinervia belongs to Plantae'
- 'Crassinervia kusnetskiana belongs to Crassinervia' according to Chachlov 1934
- 'Crassulaceophyllum belongs to Crassulaceae'
- 'Crassulaceophyllum limburgense belongs to Crassulaceophyllum' according to Kraeusel and Weyland 1954
- 'Crassulites belongs to Crassulaceae'
- 'Crataegites belongs to Plantae'
- 'Crataegites borealis belongs to Crataegites' according to Samylina 1960
- 'Cratopleura belongs to Nymphaeaceae'
- 'Cratopleura holsatica belongs to Cratopleura' according to Weber 1892
- 'Credneria belongs to Angiospermae'
- 'Credneria cuneifolia belongs to Credneria' according to Bronn 1837
- 'Credneria cuneifolia is recombined as Ettingshausenia cuneifolia' according to Stiehler 1857
- 'Credneria integerrima belongs to Credneria' according to Zenker 1833
- 'Crematopteris belongs to Plantae'
- 'Crematopteris typica belongs to Crematopteris' according to Schimper and Mougeot 1844
- 'Crenasclerotes belongs to Fungi'
- 'Crenasclerotes stachii belongs to Crenasclerotes' according to Stach and Pickhardt 1957
- 'Crepidopteris belongs to Alethopteridae'
- 'Crepidopteris marginata belongs to Crepidopteris' according to Brongniart 1838
- 'Cretosiphon belongs to Plantae'
- 'Cretosiphon caulerpoides belongs to Cretosiphon' according to Wetzel 1951
- 'Cretovarium belongs to Liliaceae'
- 'Cretovarium japonicum belongs to Cretovarium' according to Stopes and Fujii 1910
- 'Cribroperidinium belongs to Dinophyceae'
- 'Cribroperidinium sepimentum belongs to Cribroperidinium' according to Neale and Sarjeant 1962
- 'Cribrosphaerella belongs to Coccolithophorales'
- 'Crinanthus belongs to Liliaceae'
- 'Crinanthus fenzlianum belongs to Crinanthus' according to Massalongo 1859
- 'Crinites belongs to Plantae'
- 'Crinites lanceolata belongs to Crinites' according to Tate 1853
- 'Crinophyllum belongs to Calamitales'
- 'Crocalophyton belongs to Plantae'
- 'Crocalophyton readi belongs to Crocalophyton' according to Anderson and Alt 1956
- 'Croftiella belongs to Charophyta'
- 'Cromyodendron belongs to Plantae'
- 'Cromyodendron radnicense belongs to Cromyodendron' according to Presl 1838
- 'Crosschorda belongs to Plantae'
- 'Crosschorda scotica belongs to Crosschorda' according to MacCoy 1879
- 'Crossotheca belongs to Pteridospermophyta'
- 'Crossotheca crepini belongs to Crossotheca' according to Zeiller 1883
- 'Crossotolepis belongs to Coniferales'
- 'Crossotolepis perroti belongs to Crossotolepis' according to Fliche 1899
- 'Crossozamia belongs to Cycadophyta'
- 'Crossozamia moreana belongs to Crossozamia' according to Pomel 1849
- 'Crotonophyllum belongs to Euphorbiaceae'
- 'Crotonophyllum cretaceum belongs to Crotonophyllum' according to Velenovsky 1889
- 'Crowella belongs to Lauraceae'
- 'Crowella globosa belongs to Crowella' according to Bowerbank 1933
- 'Cryptarchaeodinium belongs to Dinophyceae'
- 'Cryptarchaeodinium calcaratum belongs to Cryptarchaeodinium' according to Deflandre 1939
- 'Cryptocaryoides belongs to Lauraceae'
- 'Cryptocolax belongs to Aspergillidae'
- 'Cryptocolax clarensis belongs to Cryptocolax' according to Scott 1956
- 'Cryptomeriopsis belongs to Taxodiaceae'
- 'Cryptomeriopsis antiqua belongs to Cryptomeriopsis' according to Stopes and Fujii 1910
- 'Cryptomerites belongs to Coniferophyta'
- 'Cryptophyllites belongs to Plantae'
- 'Cryptophyllites tasmanica belongs to Cryptophyllites' according to Johnston 1888
- 'Cryptoplasmium belongs to Plantae'
- 'Cryptothecium belongs to Bryophyta'
- 'Cryptothecium antediluvianum belongs to Cryptothecium' according to Huebener 1851
- 'Cryptoxylon belongs to Plantae'
- 'Cryptoxylon forfarense belongs to Cryptoxylon' according to Kidston 1897
- 'Cryptozoon belongs to Plantae'
- 'Cryptozoon proliferum belongs to Cryptozoon' according to Hall 1884
- 'Ctenidiopsis belongs to Plantae'
- 'Ctenidiopsis grojecensis belongs to Ctenidiopsis' according to Raciborski 1894
- 'Ctenidium belongs to Cycadophyta'
- 'Ctenidium integerrimum belongs to Ctenidium' according to Heer 1881
- 'Ctenidodinium belongs to Dinophyceae'
- 'Ctenidodinium ornatum belongs to Ctenidodinium' according to Deflandre 1938
- 'Ctenis belongs to Cycadophyta'
- 'Ctenis falcata belongs to Ctenis' according to Lindley and Hutton 1834
- 'Ctenis leckenbyi is recombined as Cycadopteris leckenbyi' according to Schimper 1869
- 'Ctenis leckenbyi belongs to Ctenis' according to Bean 1864
- 'Ctenophyllum belongs to Cycadophyta'
- 'Ctenophyllum latifolium is recombined as Ctenopsis latifolia' according to Fontaine 1911
- 'Ctenopsis belongs to Bennettitales'
- 'Ctenopteris belongs to Cycadophyta'
- 'Ctenopteris cycadea belongs to Ctenopteris' according to Brongniart 1872
- 'Ctenozamites belongs to Plantae'
- 'Ctenozamites cycadea belongs to Ctenozamites' according to Brongniart 1886
- 'Cucubalites belongs to Angiospermae'
- 'Cucubalites goldfussii belongs to Cucubalites' according to Goeppert 1838
- 'Cucumites belongs to Cucurbitaceae'
- 'Cucurbitariopsis belongs to Fungi'
- 'Cucurbitariopsis congregata belongs to Cucurbitariopsis' according to Beck 1883
- 'Cucurbites belongs to Cucurbitaceae'
- 'Cucurbitospermum belongs to Cucurbitaceae'
- 'Cucurbitospermum rusingense belongs to Cucurbitospermum' according to Chesters 1957
- 'Culgoweria belongs to Ginkgophyta'
- 'Culgoweria mirabilis belongs to Culgoweria' according to Florin 1936
- 'Culmites belongs to Plantae'
- 'Culmites ambiguus is recombined as Amphitoa ambigua' according to Pomel 1849
- 'Cuneatochara acuminata belongs to Cuneatochara' according to Saidakovsky 1962
- 'Cuneatopteris belongs to Plantae'
- 'Cuneiphycus texana belongs to Cuneiphycus' according to Johnson 1960
- 'Cunninghamiostrobus belongs to Taxodiaceae'
- 'Cunninghamiostrobus yabariensis belongs to Cunninghamiostrobus' according to Stopes and Fujii 1910
- 'Cunninghamites belongs to Coniferophyta'
- 'Cunninghamites oxycedrus belongs to Cunninghamites' according to Presl 1838
- 'Cunninghamites sphenolepis belongs to Cunninghamites' according to Braun 1843
- 'Cunninghamites sphenolepis is replaced by Palissya braunii' according to Endlicher 1847
- 'Cunninghamites squamosus belongs to Cunninghamites' according to Heer 1871
- 'Cunninghamites squamosus is recombined as Eurysacis squamosa' according to Schulze 1887
- 'Cunonioxylon belongs to Cunoniaceae'
- 'Cunonioxylon weinmannioides belongs to Cunonioxylon' according to Hofmann 1952
- 'Cupanites belongs to Sapindaceae'
- 'Cupanoides belongs to Magnoliopsida'
- 'Cupanoides lobatus belongs to Cupanoides' according to Bowerbank 1840
- 'Cupanoides miocenicus belongs to Cupanoides' according to Ettingshausen 1851
- 'Cupanoides miocenicus is recombined as Cupanites miocenicus' according to Schimper 1874
- 'Cupressinanthus belongs to Coniferales'
- 'Cupressinanthus polysaccus belongs to Cupressinanthus' according to Caspary 1886
- 'Cupressinites belongs to Cupressaceae'
- 'Cupressinites globosus belongs to Cupressinites' according to Bowerbank 1840
- 'Cupressinites globosus is recombined as Actinostrobites globosus' according to Endlicher 1847
- 'Cupressinites recurvatus is recombined as Frenelites recurvatus' according to Endlicher 1847
- 'Cupressinites recurvatus belongs to Cupressinites' according to Bowerbank 1840
- 'Cupressinites subangulatus belongs to Cupressinites' according to Bowerbank 1840
- 'Cupressinites subangulatus is recombined as Solenostrobus subangulatus' according to Endlicher 1847
- 'Cupressinites tesselatus belongs to Cupressinites' according to Bowerbank 1840
- 'Cupressinites tesselatus is recombined as Passalostrobus tesselatus' according to Endlicher 1847
- 'Cupressinocladus belongs to Coniferophyta'
- 'Cupressinostrobus belongs to Coniferales'
- 'Cupressinostrobus delawarensis belongs to Cupressinostrobus' according to Penny 1947
- 'Cupressinoxylon subaequale belongs to Cupressinoxylon' according to Goeppert 1850
- 'Cupressinoxylon ucranicum belongs to Cupressinoxylon' according to Goeppert 1850
- 'Cupressinoxylon ucranicum is recombined as Cupressoxylon ucranicum' according to Kraus 1870
- 'Cupressistrobus belongs to Cupressaceae'
- 'Cupressistrobus gardneri belongs to Cupressistrobus' according to Chandler 1961
- 'Cupressites belongs to Coniferophyta'
- 'Cupressites hardtii belongs to Cupressites' according to Goeppert 1837
- 'Cupressites hardtii is recombined as Chamaecyparites hardtii' according to Endlicher 1847
- 'Cupressites hulmanni belongs to Cupressites' according to Brongniart 1828
- 'Cupressites taxiformis belongs to Cupressites' according to Unger 1842
- 'Cupressites taxiformis is recombined as Sequoites taxiformis' according to Brongniart 1849
- 'Cupressites ulmanni belongs to Cupressites' according to Bronn 1837
- 'Cupressites ulmanni is recombined as Cryptomerites ulmanni' according to Brongniart 1849
- 'Cupressocarpus belongs to Plantae'
- 'Cupressocarpus ovatus belongs to Cupressocarpus' according to Brik 1925
- 'Cupressospermum belongs to Cupressaceae'
- 'Cupressospermum saxonicum belongs to Cupressospermum' according to Mai 1960
- 'Cupressoxylon belongs to Coniferophyta'
- 'Cupulicarpus belongs to Magnoliopsida'
- 'Cupulicarpus fechtneri belongs to Cupulicarpus' according to Velenovsky and Viniklar 1929
- 'Cupuliferites belongs to Casuarinaceae'
- 'Cupuliferites angmartusuticus belongs to Cupuliferites' according to Koch 1963
- 'Cupulina is a nomen nudum'
- 'Curionia belongs to Plantae'
- 'Curionia triumpilina belongs to Curionia' according to Sordelli 1896
- 'Cussoniphyllum belongs to Araliaceae'
- 'Cussoniphyllum partitum belongs to Cussoniphyllum' according to Velenovsky 1889
- 'Cyatheites belongs to Filicinae'
- 'Cyatheites schlotheimmii belongs to Cyatheites' according to Goeppert 1836
- 'Cyatheopteris belongs to Cyatheaceae'
- 'Cyathocarpus belongs to Filicinae'
- 'Cyathocaulis belongs to Cyatheaceae'
- 'Cyathocaulis naktongensis belongs to Cyathocaulis' according to Ogura 1927
- 'Cyathodendron belongs to Cyatheaceae'
- 'Cyathodendron texanum belongs to Cyathodendron' according to Arnold 1945
- 'Cyathoides belongs to Cyatheaceae'
- 'Cyathorachis belongs to Cyatheaceae'
- 'Cyathorachis fujiiana belongs to Cyathorachis' according to Ogura 1927
- 'Cyathotrachus belongs to Plantae'
- 'Cyathotrachus altus belongs to Cyathotrachus' according to Watson 1906
- 'Cycadangium belongs to Cycadophyta'
- 'Cycadangium compactum belongs to Cycadangium' according to Ogura 1932
- 'Cycadea belongs to Cycadophyta'
- 'Cycadea imolensis belongs to Cycadea' according to Capellini and Solms-Laubach 1892
- 'Cycadeacites belongs to Cycadophyta'
- 'Cycadella belongs to Cycadophyta'
- 'Cycadella reedii belongs to Cycadella' according to Ward 1900
- 'Cycadeocarpus belongs to Cycadophyta'
- 'Cycadeocarpus columbianus belongs to Cycadeocarpus' according to Dawson 1873
- 'Cycadeoidea belongs to Cycadeoideopsida'
- 'Cycadeoidella belongs to Cycadeoideopsida'
- 'Cycadeoidella japonica belongs to Cycadeoidella' according to Ogura 1930
- 'Cycadeomyelon belongs to Cycadophyta'
- 'Cycadeomyelon hettangense belongs to Cycadeomyelon' according to Saporta 1875
- 'Cycadeorachis belongs to Cycadophyta'
- 'Cycadeospermum belongs to Cycadophyta'
- 'Cycadeospermum hettangense belongs to Cycadeospermum' according to Saporta 1874
- 'Cycadeostrobus belongs to Cycadophyta'
- 'Cycadeostrobus ovatus belongs to Cycadeostrobus' according to Carruthers 1867
- 'Cycadinocarpus belongs to Cycadophyta'
- 'Cycadinocarpus belongs to Cycadophyta'
- 'Cycadinocarpus augustodensis belongs to Cycadinocarpus' according to Brongniart 1896
- 'Cycadinocarpus keuperianus belongs to Cycadinocarpus' according to Schenk 1870
- 'Cycadinoxylon belongs to Gymnospermophyta'
- 'Cycadinoxylon czeczotti belongs to Cycadinoxylon' according to Zalewska 1955
- 'Cycadites belongs to Cycadophyta'
- 'Cycadites belongs to Cycadophyta'
- 'Cycadites brongniarti is replaced by Hisingera mantellii' according to Miquel 1842
- 'Cycadites brongniarti belongs to Cycadites' according to Mantell 1833
- 'Cycadites columnaris belongs to Cycadites' according to Presl 1838
- 'Cycadites columnaris is recombined as Cycadeacites columnaris' according to Morris 1841
- 'Cycadites megalophyllus belongs to Cycadites' according to Buckland 1836
- 'Cycadites nilsoni belongs to Cycadites' according to Sternberg 1825
- 'Cycadites zamioides belongs to Cycadites' according to Leckenby 1864
- 'Cycadites zamioides is recombined as Thomasiocladus zamioides' according to Florin 1958
- 'Cycadium belongs to Plantae'
- 'Cycadium cyprinopholis belongs to Cycadium' according to Guillard 1839
- 'Cycadocarpidium belongs to Cycadophyta'
- 'Cycadocarpidium erdmanni belongs to Cycadocarpidium' according to Nathorst 1886
- 'Cycadocarpidium macrozamioides belongs to Cycadocarpidium' according to Schuster 1911
- 'Cycadocarpidium macrozamioides is recombined as Zamioidea macrozamioides' according to Schuster 1931
- 'Cycadocaulum belongs to Cycadophyta'
- 'Cycadocaulum rhaeticum belongs to Cycadocaulum' according to Frentzen 1932
- 'Cycadocephalus belongs to Cycadophyta'
- 'Cycadocephalus sewardi belongs to Cycadocephalus' according to Nathorst 1902
- 'Cycadofilix belongs to Cycadophyta'
- 'Cycadolepis belongs to Cycadophyta'
- 'Cycadophycos belongs to Cycadophyta'
- 'Cycadophyllum belongs to Cycadophyta'
- 'Cycadophyllum elegans belongs to Cycadophyllum' according to Bornemann 1856
- 'Cycadophytites belongs to Cycadophyta'
- 'Cycadopsis belongs to Cycadophyta'
- 'Cycadopteris belongs to Pteridophyta'
- 'Cycadopteris belongs to Cycadophyta'
- 'Cycadopteris brauniana belongs to Cycadopteris' according to Zigno 1861
- 'Cycadopteris ungeri belongs to Cycadopteris' according to Zigno 1853
- 'Cycadorachis belongs to Cycadophyta'
- 'Cycadorachis armata belongs to Cycadorachis' according to Saporta 1873
- 'Cycadospadix belongs to Cycadales'
- 'Cycadospadix dactylota belongs to Cycadospadix' according to Harris 1932
- 'Cycadospadix dactylota is recombined as Bennettitolepis dactylota' according to Florin 1933
- 'Cycadospadix hennocquei belongs to Cycadospadix' according to Pomel 1870
- 'Cycadospadix krasseri belongs to Cycadospadix' according to Schuster 1911
- 'Cycadospadix krasseri is recombined as Haitingeria krasseri' according to Krasser 1916
- 'Cycadospadix milleryensis belongs to Cycadospadix' according to Renault 1896
- 'Cycadospadix milleryensis is recombined as Autunia milleryensis' according to Krasser 1921
- 'Cycadoxylon belongs to Cycadophyta'
- 'Cycadoxylon fremyi belongs to Cycadoxylon' according to Renault 1879
- 'Cyclanthodendron belongs to Cyclanthaceae'
- 'Cyclocarpon belongs to Plantae'
- 'Cyclocarpon nummularium belongs to Cyclocarpon' according to Goeppert and Fiedler 1857
- 'Cyclocarpus is a nomen nudum'
- 'Cyclocarpus nummularis is replaced by Cyclospermum tenuis' according to Seward 1917
- 'Cyclocarpus nummularis belongs to Cyclocarpus' according to Brongniart 1881
- 'Cyclocladia belongs to Lycopodophyta'
- 'Cyclocladia major belongs to Cyclocladia' according to Lindley and Hutton 1834
- 'Cyclocrinites is replaced by Cyclorinus' according to Eichwald 1860
- 'Cyclocrinites spaskii belongs to Cyclocrinites' according to Eichwald 1840
- 'Cyclocrinites spaskii is recombined as Cyclorinus spaskii' according to Eichwald 1860
- 'Cyclodendron belongs to Lycopodophyta'
- 'Cyclodendron lesliimecdup belongs to Cyclodendron' according to Seward 1928
- 'Cyclois belongs to Plantae'
- 'Cycloites belongs to Problematica'
- 'Cyclonephelium belongs to Dinophyceae'
- 'Cyclopitys belongs to Plantae'
- 'Cyclopitys dichotoma belongs to Cyclopitys' according to Feistmantel 1886
- 'Cyclopitys nordenskioldi belongs to Cyclopitys' according to Heer 1879
- 'Cyclopteris angustifolia belongs to Cyclopteris' according to McCoy 1847
- 'Cyclopteris angustifolia is recombined as Gangamopteris angustifolia' according to McCoy 1875
- 'Cyclopteris beani belongs to Cyclopteris' according to Lindley and Hutton 1832
- 'Cyclopteris beani is recombined as Sphenozamites beani' according to Brongniart 1849
- 'Cyclopteris dissecta belongs to Cyclopteris' according to Goeppert 1852
- 'Cyclopteris dissecta is recombined as Sphenopteridium dissectum' according to Schimper 1874
- 'Cyclopteris hibernica is recombined as Palaeopteris hibernica' according to Schimper 1869
- 'Cyclopteris hibernica belongs to Cyclopteris' according to Forbes 1854
- 'Cyclopteris hibernica is recombined as Archaeopteris hibernica' according to Dawson 1871
- 'Cyclopteris jenkinsiana belongs to Cyclopteris' according to Tate 1867
- 'Cyclopteris jenkinsiana is recombined as Eurycycadolepis jenkinsiana' according to Seward 1917
- 'Cyclopteris oblata belongs to Cyclopteris' according to Lindley and Hutton 1837
- 'Cyclopteris oblata is recombined as Pseudocyclopteris oblata' according to Grand'Eury 1877
- 'Cyclopteris obliqua belongs to Cyclopteris' according to Brongniart 1830
- 'Cyclopteris obliqua is recombined as Nephropteris obliqua' according to Brongniart 1849
- 'Cyclopteris polymorpha belongs to Cyclopteris' according to Goeppert 1859
- 'Cyclopteris polymorpha is recombined as Cardiopteris polymorpha' according to Schimper 1869
- 'Cyclopteris polymorpha is recombined as Fryopsis polymorpha' according to Wolfe 1962
- 'Cyclopteris reniformis belongs to Cyclopteris' according to Brongniart 1830
- 'Cyclorinus belongs to Plantae'
- 'Cyclospermum belongs to Plantae'
- 'Cyclospermum tenuis belongs to Cyclospermum' according to Seward 1917
- 'Cyclostigma belongs to Lycopodophyta'
- 'Cyclostigma kiltorkense belongs to Cyclostigma' according to Haughton 1860
- 'Cyclotheca belongs to Marattiaceae'
- 'Cyclotheca biseriata belongs to Cyclotheca' according to Kidston 1888
- 'Cyclozamia belongs to Cycadophyta'
- 'Cyclozamia insignis belongs to Cyclozamia' according to Pomel 1849
- 'Cylindrites belongs to Plantae'
- 'Cylindrites funalis belongs to Cylindrites' according to Massalongo 1856
- 'Cylindrites funalis is recombined as Sparthophycos funalis' according to Massalongo 1859
- 'Cylindrites spongioides belongs to Cylindrites' according to Goeppert 1841
- 'Cylindroplasmium belongs to Plantae'
- 'Cylindropodium belongs to Cycadophyta'
- 'Cylindropodium liasinum belongs to Cylindropodium' according to Saporta 1874
- 'Cylindroporella belongs to Dasycladaceae'
- 'Cylindroporella barnesii belongs to Cylindroporella' according to Johnson 1954
- 'Cylindrosphaera belongs to Coccolithophorales'
- 'Cylindrosphaera alpanensis belongs to Cylindrosphaera' according to Maslov 1956
- 'Cylostrobus belongs to Lycopodophyta'
- 'Cymatiogalea belongs to Dinophyceae'
- 'Cymatiogalea margaritata belongs to Cymatiogalea' according to Deunff 1961
- 'Cymatiosphaera belongs to Acritarcha'
- 'Cymatiosphaera radiata belongs to Cymatiosphaera' according to Wetzel 1933
- 'Cymodoceites belongs to Naiadaceae'
- 'Cymoglossa belongs to Pteropsida'
- 'Cynarocephalus belongs to Plantae'
- 'Cynarocephalus schuberti belongs to Cynarocephalus' according to Kerner 1916
- 'Cynometrophyllum belongs to Leguminosae'
- 'Cynometrophyllum villense belongs to Cynometrophyllum' according to Weyland and Kilpper 1963
- 'Cynometroxylon belongs to Caesalpiniaceae'
- 'Cynometroxylon indicum belongs to Cynometroxylon' according to Chaudhury and Ghosh 1946
- 'Cyparissidium belongs to Taxodiaceae'
- 'Cyperacites belongs to Cyperaceae'
- 'Cyperites belongs to Lycopodophyta'
- 'Cyperites bicarinata belongs to Cyperites' according to Lindley and Hutton 1832
- 'Cyperites dubius belongs to Cyperites' according to Heer 1855
- 'Cyperites dubius is recombined as Cyperacites dubius' according to Schimper 1870
- 'Cyperocarpus belongs to Cyperaceae'
- 'Cyperocarpus uncinatus belongs to Cyperocarpus' according to Pax 1906
- 'Cyperocaulon belongs to Plantae'
- 'Cyperocaulon paxianum belongs to Cyperocaulon' according to Lingelsheim 1917
- 'Cyphopteris belongs to Alethopteridae'
- 'Cyphopteris punctulata belongs to Cyphopteris' according to Brongniart 1838
- 'Cypselites belongs to Compositae'
- 'Cypselites neagelii belongs to Cypselites' according to Heer 1859
- 'Cyrilloxylon belongs to Plantae'
- 'Cyrilloxylon europaeum belongs to Cyrilloxylon' according to van der Burgh 1964
- 'Cyrrhites belongs to Plantae'
- 'Cyrrhites oeningensis belongs to Cyrrhites' according to Heer 1859
- 'Cystiphycus belongs to Plantae'
- 'Cystiphycus latifrons belongs to Cystiphycus' according to Herzer 1901
- 'Cystorrhiza is a nomen nudum'
- 'Cystoseirites is a nomen nudum'
- 'Cystoseirites partschii belongs to Cystoseirites' according to Sternberg 1833
- 'Czapcoctia belongs to Plantae'
- 'Czapcoctia magnifolia belongs to Czapcoctia' according to Rasskazova 1960
- 'Czekanowskia belongs to Ginkgophyta'
- 'Czekanowskia setacea belongs to Czekanowskia' according to Heer 1876
- 'Dacrydites belongs to Plantae'
- 'Dacrydites incertus belongs to Dacrydites' according to Marik 1901
- 'Dactylethrophyllum belongs to Coniferales'
- 'Dactylethrophyllum peristictum belongs to Dactylethrophyllum' according to Wesley 1956
- 'Dactyliodiscus triangularis belongs to Dactyliodiscus' according to Renault 1899
- 'Dactylodiscus belongs to Plantae'
- 'Dactyloidites bulbosus belongs to Dactyloidites' according to Hall 1886
- 'Dactylophycus tridigitatum belongs to Dactylophycus' according to Miller and Dyer 1878
- 'Dactylophyllum belongs to Ginkgoopsida'
- 'Dactylophyllum johnsoni belongs to Dactylophyllum' according to Read 1934
- 'Dactylopora belongs to Dasycladaceae'
- 'Dactylopora annulus belongs to Dactylopora' according to Parker and Jones 1860
- 'Dactylopora annulus is recombined as Parnesina annulus' according to Steinmann 1899
- 'Dactylopora cylindracea belongs to Dactylopora' according to Lamarck 1838
- 'Dactyloporella belongs to Plantae'
- 'Dactyloporella cylindracea belongs to Dactyloporella' according to Defrance 1871
- 'Dactyloporus belongs to Polyporaceae'
- 'Dactyloporus archaeus belongs to Dactyloporus' according to Herzer 1893
- 'Dactylopteris belongs to Pteridophyta'
- 'Dactylopteris stiehleriana belongs to Dactylopteris' according to Goeppert 1852
- 'Dactylotheca belongs to Pteridophyta'
- 'Dactylotheca dentata belongs to Dactylotheca' according to Brongniart 1883
- 'Dactyolepis belongs to Coniferales'
- 'Dactyolepis cryptomerioides belongs to Dactyolepis' according to Hollick and Jeffrey 1909
- 'Dadoxylon belongs to Plantae'
- 'Dadoxylon chaneyi belongs to Dadoxylon' according to Daugherty 1941
- 'Dadoxylon chaneyi is recombined as Koleoxylon chaneyi' according to Vogellehner 1965
- 'Dadoxylon implexum belongs to Dadoxylon' according to Zimmermann 1953
- 'Dadoxylon implexum is recombined as Baieroxylon implexum' according to Greguss 1961
- 'Dadoxylon jhariense belongs to Dadoxylon' according to Surange and Sah 1956
- 'Dadoxylon jhariense is recombined as Barakaroxylon jhariense' according to Surange and Maithy 1962
- 'Dadoxylon oldhamium belongs to Dadoxylon' according to Binney 1866
- 'Dadoxylon oldhamium is recombined as Lyginopteris oldhamia' according to Potonie 1897
- 'Dadoxylon pedroi belongs to Dadoxylon' according to Zeiller 1895
- 'Dadoxylon pedroi is recombined as Lobatoxylon pedroi' according to Kraeusel 1956
- 'Dadoxylon pedroi is recombined as Trigonomyelon pedroi' according to Walton 1925
- 'Dadoxylon sclerosum belongs to Dadoxylon' according to Walton 1925
- 'Dadoxylon sclerosum is recombined as Kaokoxylon sclerosum' according to Kraeusel 1956
- 'Dadoxylon spenceri belongs to Dadoxylon' according to Scott 1902
- 'Dadoxylon spenceri is recombined as Parapitys spenceri' according to Zalessky 1911
- 'Daedaleites belongs to Fungi'
- 'Daedaleites quercinus belongs to Daedaleites' according to Massalongo 1892
- 'Daedalus newtoni belongs to Daedalus' according to Roualt 1850
- 'Dahurites belongs to Plantae'
- 'Dahurites inopinata belongs to Dahurites' according to Prinada 1962
- 'Daimonelix belongs to Problematica'
- 'Daimonelix circumaxilis belongs to Daimonelix' according to Barbour 1892
- 'Dalbergiophyllum belongs to Leguminosae'
- 'Dalbergiophyllum affine belongs to Dalbergiophyllum' according to Ettingshausen 1886
- 'Dalbergioxylon belongs to Leguminosae'
- 'Dalbergioxylon antiquum belongs to Dalbergioxylon' according to Ramanujam 1960
- 'Dalbergites belongs to Plantae'
- 'Dalbergites belongs to Leguminosae'
- 'Dalbergites ellipticifolius belongs to Dalbergites' according to Berry 1916
- 'Dalejophyton belongs to Plantae'
- 'Dalejophyton nemejci belongs to Dalejophyton' according to Obrhel 1957
- 'Dammarites belongs to Coniferales'
- 'Dammarites albens belongs to Dammarites' according to Presl 1838
- 'Dammarophyllum belongs to Coniferophyta'
- 'Danaeides belongs to Pteridophyta'
- 'Danaeites is replaced by Danaeides' according to Schimper 1869
- 'Danaeites asplenioides belongs to Danaeites' according to Göppert 1836
- 'Danaeites asplenioides is recombined as Danaeides asplenioides' according to Schimper 1869
- 'Dapcodinium belongs to Dinoflagellata'
- 'Daphnites belongs to Plantae'
- 'Daphnites goepperti belongs to Daphnites' according to Ettingshausen 1867
- 'Daphnogene belongs to Angiospermae'
- 'Daphnophyllum belongs to Plantae'
- 'Daphnophyllum fraasii belongs to Daphnophyllum' according to Heer 1869
- 'Dascycladites belongs to Plantae'
- 'Dascycladites subclavaeformis belongs to Dascycladites' according to Fucini 1936
- 'Dasydiacrodium belongs to Acritarcha'
- 'Dasydiacrodium eichwaldi belongs to Dasydiacrodium' according to Timofeev 1959
- 'Dasyphyllum belongs to Plantae'
- 'Dasyphyllum rigidum belongs to Dasyphyllum' according to Nathorst 1886
- 'Dasyporella silurica belongs to Dasyporella' according to Stolley 1893
- 'Dasyrytidodiacrodium is a nomen nudum'
- 'Daubreeia belongs to Neuropteridae'
- 'Daubreeia pateraeformis belongs to Daubreeia' according to Germar 1888
- 'Davallites belongs to Pteridophyta'
- 'Davallites richardsoni belongs to Davallites' according to Dawson 1883
- 'Davidoidea belongs to Nyssaceae'
- 'Davidoidea hebridica belongs to Davidoidea' according to Johnson 1937
- 'Davisella belongs to Boraginaceae'
- 'Davisella ehretioides belongs to Davisella' according to Reid and Chandler 1933
- 'Davisicarpum belongs to Menispermaceae'
- 'Davisicarpum gibbosum belongs to Davisicarpum' according to Chandler 1961
- 'Dawsonites belongs to Psilophytophyta'
- 'Dawsonites arcuatus belongs to Dawsonites' according to Halle 1916
- 'Debeya belongs to Moraceae'
- 'Debeya serrata belongs to Debeya' according to Miquel 1853
- 'Decagonocarpus belongs to Plantae'
- 'Decagonocarpus olivaeformis belongs to Decagonocarpus' according to Renault 1890
- 'Decaplatyspermum belongs to Linaceae'
- 'Decaplatyspermum bowerbanki belongs to Decaplatyspermum' according to Reid and Chandler 1933
- 'Dechenia belongs to Plantae'
- 'Dechenia euphorbioides belongs to Dechenia' according to Goeppert 1842
- 'Deflandrea belongs to Dinophyceae'
- 'Deflandrea phosphoritica belongs to Deflandrea' according to Eisenack 1938
- 'Delesserites belongs to Plantae'
- 'Delesserites hampeana belongs to Delesserites' according to Stiehler 1857
- 'Delesserites hampeana is recombined as Zonopleura hampeana' according to Massalongo 1859
- 'Delesserites pyriformis belongs to Delesserites' according to Massalongo 1851
- 'Delesserites pyriformis is recombined as Pasinia pyriformis' according to Massalongo 1851
- 'Delesserites salicifolia belongs to Delesserites' according to Ruedemann 1925
- 'Delgadoa belongs to Pteridophyta'
- 'Delgadoa occidentalis belongs to Delgadoa' according to Heer 1881
- 'Delgadopsis belongs to Plantae'
- 'Delgadopsis rhizostigma belongs to Delgadopsis' according to Saporta 1894
- 'Deltasperma belongs to Pteridospermophyta'
- 'Deltasperma fouldenense belongs to Deltasperma' according to Long 1961
- 'Deltenrea belongs to Plantae'
- 'Deltenrea clavaeformis belongs to Deltenrea' according to Stockmans and Williere 1958
- 'Deltolepis belongs to Cycadopsida'
- 'Deltolepis credipota belongs to Deltolepis' according to Harris 1942
- 'Demaliaceae belongs to Fungi'
- 'Dematiaceae belongs to Hyphomycetes'
- 'Demetria belongs to Lycopodophyta'
- 'Demetria amadoca belongs to Demetria' according to Zalessky 1930
- 'Dendractis belongs to Plantae'
- 'Dendractis brevis belongs to Dendractis' according to Reis 1923
- 'Dendraena belongs to Sphenopteridae'
- 'Dendraena pinnatilobata belongs to Dendraena' according to Nemejc 1934
- 'Dendrophycus belongs to Plantae'
- 'Dendrophycus desorii belongs to Dendrophycus' according to Lesquereux 1884
- 'Dendroplasmium belongs to Plantae'
- 'Dendropteridium belongs to Cyatheaceae'
- 'Dendropteridium cyatheoides belongs to Dendropteridium' according to Bancroft 1932
- 'Dennstaedtiopsis belongs to Polypodiaceae'
- 'Dennstaedtiopsis aerenchymata belongs to Dennstaedtiopsis' according to Arnold and Daugherty 1964
- 'Depazites belongs to Fungi'
- 'Depazites acericola belongs to Depazites' according to Saporta 1892
- 'Derbyella belongs to Glossopteridaceae'
- 'Derbyella aurita belongs to Derbyella' according to White 1908
- 'Dermatophyllites belongs to Ericaceae'
- 'Dermatophyllites stilligerus belongs to Dermatophyllites' according to Goeppert and Berendt 1845
- 'Desmia belongs to Plantae'
- 'Desmia fistulosa belongs to Desmia' according to Eichwald 1860
- 'Desmidiaceae belongs to Viridiplantae'
- 'Desmiophyllum gracile belongs to Desmiophyllum' according to Lesquereux 1878
- 'Desmodites belongs to Plantae'
- 'Desmodites radobojensis belongs to Desmodites' according to Unger 1839
- 'Desmodophyllum belongs to Leguminosae'
- 'Desmodophyllum viticinoides belongs to Desmodophyllum' according to Unger 1850
- 'Desmophlebis belongs to Pteridophyta'
- 'Desmopteris belongs to Plantae'
- 'Deunffia belongs to Acritarcha'
- 'Deunffia monospinosa belongs to Deunffia' according to Downie 1960
- 'Dewalquea belongs to Plantae'
- 'Dewalquea haldemiana belongs to Dewalquea' according to Debey 1873
- 'Diachaenites belongs to Umbelliferae'
- 'Diachaenites heeri belongs to Diachaenites' according to Braun 1859
- 'Dicalamophyllum belongs to Plantae'
- 'Dicalamophyllum altendorfense belongs to Dicalamophyllum' according to Sterzel 1880
- 'Diceras belongs to Taxodiaceae'
- 'Diceras cenomanicus belongs to Diceras' according to Velenovsky 1889
- 'Diceratosperma belongs to Trichopityaceae'
- 'Diceratosperma carpenteriana belongs to Diceratosperma' according to Andrews 1941
- 'Dichandrium belongs to Taxodiaceae'
- 'Dichandrium cretaceum belongs to Dichandrium' according to Velenovsky and Viniklar 1931
- 'Dichoneuron belongs to Plantae'
- 'Dichoneuron hookeri belongs to Dichoneuron' according to Saporta and Marion 1885
- 'Dichophyllites belongs to Plantae'
- 'Dichophyllites karagandensis belongs to Dichophyllites' according to Borsuk 1960
- 'Dichophyllum belongs to Ginkgophyta'
- 'Dichophyllum moorei belongs to Dichophyllum' according to Elias 1936
- 'Dichophyton belongs to Plantae'
- 'Dichophyton typicum belongs to Dichophyton' according to Petrosian and Kovbasina 1962
- 'Dichopteris belongs to Pteridophyta'
- 'Dichopteris visianica belongs to Dichopteris' according to Zigno 1864
- 'Dichotospermum belongs to Pteropsida'
- 'Dichotozamites belongs to Cycadophyta'
- 'Dicksoniopsis belongs to Cyatheaceae'
- 'Dicksoniopteris belongs to Pteridophyta'
- 'Dicksoniopteris naumanni belongs to Dicksoniopteris' according to Nathorst 1890
- 'Dicksonites pluckeneti belongs to Dicksonites' according to Schlotheim 1881
- 'Diclidocarya belongs to Plantae'
- 'Diclidocarya gibbosa belongs to Diclidocarya' according to Reid 1920
- 'Dicotylirhizos belongs to Angiospermae'
- 'Dicotylirhizos sahnii belongs to Dicotylirhizos' according to Rao 1958
- 'Dicotylophyllum belongs to Angiospermae'
- 'Dicotylophyllum cerciforme belongs to Dicotylophyllum' according to Saporta 1894
- 'Dicotylophyllum stopesii belongs to Dicotylophyllum' according to Bandulska 1923
- 'Dicranites belongs to Plantae'
- 'Dicranites casparyi belongs to Dicranites' according to Klebs 1907
- 'Dicranophyllum gallicum belongs to Dicranophyllum' according to Grand'Eury 1877
- 'Dicranophyton belongs to Psilophytales'
- 'Dicranophyton niayssiense belongs to Dicranophyton' according to Zalessky 1937
- 'Dicranopteris belongs to Sphenopteridae'
- 'Dicranopteris regia belongs to Dicranopteris' according to Zalessky 1937
- 'Dicroidiopsis belongs to Pteridospermophyta'
- 'Dicroidiopsis incisa belongs to Dicroidiopsis' according to DuToit 1943
- 'Dicroidium belongs to Pteridospermophyta'
- 'Dicrophlebis belongs to Plantae'
- 'Dicrophlebis affinis belongs to Dicrophlebis' according to Schlotheim 1857
- 'Dicropteris belongs to Pteridophyta'
- 'Dicropteris laciniata belongs to Dicropteris' according to Pomel 1849
- 'Dictiophragmium belongs to Plantae'
- 'Dictuolites belongs to Plantae'
- 'Dictuolites beckii belongs to Dictuolites' according to Conrad 1838
- 'Dictyocalamites belongs to Calamitales'
- 'Dictyocalamites burri belongs to Dictyocalamites' according to Arber 1912
- 'Dictyocallipteridium belongs to Pteridophyta'
- 'Dictyocallipteridium sundaicum belongs to Dictyocallipteridium' according to Jongmans and Gothan 1935
- 'Dictyocordaites belongs to Cordaitales'
- 'Dictyocordaites lacoi belongs to Dictyocordaites' according to Dawson 1889
- 'Dictyodendron is replaced by Arctodendron' according to Nathorst 1919
- 'Dictyodendron belongs to Plantae'
- 'Dictyodendron belongs to Coniferophyta'
- 'Dictyodendron kidstonii belongs to Dictyodendron' according to Nathorst 1914
- 'Dictyodendron kidstonii is recombined as Arctodendron kidstonii' according to Nathorst 1919
- 'Dictyodendron leuchtenbergii belongs to Dictyodendron' according to Eichwald 1860
- 'Dictyodendron patricii belongs to Dictyodendron' according to Landsborough 1844
- 'Dictyodora liebeana belongs to Dictyodora' according to Geinitz 1884
- 'Dictyophlois belongs to Plantae'
- 'Dictyophlois reticulata belongs to Dictyophlois' according to Foerste 1916
- 'Dictyophycus belongs to Problematica'
- 'Dictyophycus pseudotubulatus belongs to Dictyophycus' according to Korde 1954
- 'Dictyophyllum belongs to Dipteridaceae'
- 'Dictyophyllum rugosum belongs to Dictyophyllum' according to Lindley and Hutton 1834
- 'Dictyophyton belongs to Problematica'
- 'Dictyophyton newberryi belongs to Dictyophyton' according to Hall 1863
- 'Dictyoplasmium belongs to Plantae'
- 'Dictyopteridium belongs to Plantae'
- 'Dictyopteris belongs to Plantae'
- 'Dictyopteris brongniarti belongs to Dictyopteris' according to Gutbier 1835
- 'Dictyopteris falcata belongs to Dictyopteris' according to Morris 1863
- 'Dictyopteris falcata is recombined as Dictyozamites falcatus' according to Medlicott and Blanford 1879
- 'Dictyopyxidia belongs to Dinophyceae'
- 'Dictyopyxis is replaced by Dictyopyxidia' according to Eisenack 1961
- 'Dictyopyxis areolata is recombined as Dictyopyxidia areolata' according to Eisenack 1961
- 'Dictyosphaeridium belongs to Acritarcha'
- 'Dictyosphaeridium deflandrei belongs to Dictyosphaeridium' according to Wetzel 1952
- 'Dictyosporites belongs to Fungi'
- 'Dictyosporites loculatus belongs to Dictyosporites' according to Felix 1894
- 'Dictyostelopteris belongs to Pteridophyta'
- 'Dictyostelopteris rajmahalense belongs to Dictyostelopteris' according to Vishnu-Mittre 1959
- 'Dictyotesta belongs to Plantae'
- 'Dictyotesta lonchopteroides belongs to Dictyotesta' according to Gothan 1941
- 'Dictyothalamus belongs to Plantae'
- 'Dictyothalamus schrollianus belongs to Dictyothalamus' according to Goeppert 1864
- 'Dictyothylakos belongs to Plantae'
- 'Dictyothylakos pesslerae belongs to Dictyothylakos' according to Horst 1954
- 'Dictyotidium belongs to Acritarcha'
- 'Dictyotites belongs to Plantae'
- 'Dictyotites brongniartii belongs to Dictyotites' according to Massalongo 1959
- 'Dictyotopileos belongs to Micropeltaceae'
- 'Dictyotopileos yalensis belongs to Dictyotopileos' according to Dilcher 1965
- 'Dictyoxylon belongs to Pteridospermophyta'
- 'Dictyoxylon belongs to Sigillariaceae'
- 'Dictyoxylon oldhamium belongs to Dictyoxylon' according to Binney 1869
- 'Dictyozamites [misspelled as Dictozamites] belongs to Plantae'
- 'Didymophyllon belongs to Lycopodophyta'
- 'Didymophyllon schottini belongs to Didymophyllon' according to Goeppert 1841
- 'Didymosorus belongs to Gleicheniaceae'
- 'Didymosorus comptoniifolius belongs to Didymosorus' according to Debey and Ettingshausen 1859
- 'Didymosphaerites belongs to Plantae'
- 'Didymosphaerites pierantonii belongs to Didymosphaerites' according to Fiore 1931
- 'Didymotheca belongs to Plantae'
- 'Didymotheca cordata belongs to Didymotheca' according to Goeppert 1864
- 'Diemenia belongs to Lauraceae'
- 'Diemenia speciosa belongs to Diemenia' according to Ettingshausen 1886
- 'Dieune belongs to Angiospermae'
- 'Dieune pluriovulata belongs to Dieune' according to Mueller 1874
- 'Difurcosphenophyllum belongs to Sphenophyllaceae'
- 'Digitella belongs to Bornetellaceae'
- 'Digitella dactyloporoides belongs to Digitella' according to Morellet and Morellet 1913
- 'Digitolithus belongs to Plantae'
- 'Digitolithus rugatus belongs to Digitolithus' according to Fritsch 1908
- 'Digonospermum belongs to Plantae'
- 'Digonospermum grilletti belongs to Digonospermum' according to Renault 1907
- 'Diichnia belongs to Calamopityales'
- 'Diichnia kentuckiensis belongs to Diichnia' according to Read 1936
- 'Dilleniaecarpum belongs to Dilleniaceae'
- 'Dilleniaecarpum rottense belongs to Dilleniaecarpum' according to Weyland 1948
- 'Dillenites belongs to Dilleniaceae'
- 'Dilogopteris is a nomen nudum'
- 'Dimastigobolus belongs to Acritarcha'
- 'Dimastigobolus longifilum belongs to Dimastigobolus' according to Deflandre 1935
- 'Dimeripteris belongs to Pteridospermophyta'
- 'Dimeripteris fasciculata belongs to Dimeripteris' according to Schmalhausen 1894
- 'Dimorphosiphon belongs to Codiaceae'
- 'Dimorphosiphon rectangulare belongs to Dimorphosiphon' according to Høeg 1927
- 'Dimorphostroma belongs to Plantae'
- 'Dimorphostroma varians belongs to Dimorphostroma' according to Reis 1921
- 'Dineuron belongs to Coenopteridales'
- 'Dineuron ellipticum belongs to Dineuron' according to Kidston 1908
- 'Dineuron ellipticum is recombined as Metadineuron ellipticum' according to Galtier 1964
- 'Dineuron pteroides belongs to Dineuron' according to Renault 1896
- 'Dinopterygium belongs to Dinophyceae'
- 'Dioonites belongs to Cycadopsida'
- 'Dioonites pennaeformis belongs to Dioonites' according to Schenk 1864
- 'Dioonites pennaeformis is recombined as Dioonitocarpidium pennaeformis' according to Lilienstern 1928
- 'Dioonitocarpidium belongs to Cycadophyta'
- 'Dioonopteris belongs to Plantae'
- 'Dioonopteris permica belongs to Dioonopteris' according to Goeppert 1864
- 'Diornatosphaera belongs to Dinophyceae'
- 'Diornatosphaera angusta belongs to Diornatosphaera' according to Downie 1958
- 'Dioscoreophyllum belongs to Dioscoreaceae'
- 'Dioscoreophyllum liblarense belongs to Dioscoreophyllum' according to Kraeusel and Weyland 1954
- 'Dioscorites belongs to Dioscoreaceae'
- 'Dioscorites resurgens belongs to Dioscorites' according to Saporta 1863
- 'Dioscoroides belongs to Plantae'
- 'Dioscoroides lyelli belongs to Dioscoroides' according to Watelet 1904
- 'Diospyrophyllum belongs to Magnoliopsida'
- 'Diospyros provecta belongs to Diospyros' according to Velenovsky 1884
- 'Diospyros provecta is recombined as Diospyrophyllum provectum' according to Velenovsky 1889
- 'Diospyros schweinfurthi belongs to Diospyros' according to Heer 1876
- 'Diospyros schweinfurthi is recombined as Palaeowetherellia schweinfurthi' according to Chandler 1954
- 'Diphyllites belongs to Leguminosae'
- 'Diphyllites membranaceus belongs to Diphyllites' according to Heer 1883
- 'Diplasiophyllum belongs to Pteridophyta'
- 'Diplasiophyllum hughesi belongs to Diplasiophyllum' according to Feistmantel 1943
- 'Diplasterotheca belongs to Pteropsida'
- 'Diplazites belongs to Pteridophyta'
- 'Diplazites emarginatus belongs to Diplazites' according to Goeppert 1836
- 'Diplocyma belongs to Plantae'
- 'Diplocyma elberskirchianum belongs to Diplocyma' according to Steinmann and Elberskirch 1929
- 'Diplodendron belongs to Pteridophyta'
- 'Diplodendron hastatum belongs to Diplodendron' according to Eichwald 1846
- 'Diplodictyum belongs to Plantae'
- 'Diplodictyum obtusilobum belongs to Diplodictyum' according to Braun 1843
- 'Diplofusa belongs to Acritarcha'
- 'Diplofusa gearlensis belongs to Diplofusa' according to Cookson and Eisenack 1960
- 'Diplolabis belongs to Coenopteridales'
- 'Diplolabis forensis belongs to Diplolabis' according to Renault 1896
- 'Diplomastixia belongs to Cornaceae'
- 'Diplomastixia carinata belongs to Diplomastixia' according to Kirchheimer 1934
- 'Diplophacelus belongs to Pteridophyta'
- 'Diplophacelus arboreus belongs to Diplophacelus' according to Corda 1845
- 'Diplophragmium belongs to Plantae'
- 'Diplophyllum belongs to Leguminosae'
- 'Diplophyllum cretaceum belongs to Diplophyllum' according to Velenovsky and Viniklar 1929
- 'Diplopora belongs to Dasycladaceae'
- 'Diplopteridium belongs to Sphenopteridae'
- 'Diplopteridium teilianum belongs to Diplopteridium' according to Kidston 1931
- 'Diplopterotesta belongs to Plantae'
- 'Diplopterotesta spitzbergensis belongs to Diplopterotesta' according to Heer 1914
- 'Diplosphaera is replaced by Diplosphaerina' according to Derville 1952
- 'Diplosphaera mastophora belongs to Diplosphaera' according to Derville 1950
- 'Diplosphaera mastophora is recombined as Diplosphaerina mastophora' according to Derville 1952
- 'Diplosporites belongs to Mucedinaceae'
- 'Diplosporium belongs to Fungi'
- 'Diplosporium ovale belongs to Diplosporium' according to Renault 1899
- 'Diplosporium ovale is recombined as Diplosporites ovalis' according to Pia 1927
- 'Diplostrobus belongs to Coniferales'
- 'Diplostrobus stupeckyanus belongs to Diplostrobus' according to Velenovsky and Viniklar 1931
- 'Diplotegium belongs to Plantae'
- 'Diplotegium brownianum belongs to Diplotegium' according to Corda 1845
- 'Diplotesta belongs to Plantae'
- 'Diplotesta grandeuryana belongs to Diplotesta' according to Brongniart 1874
- 'Diplotheca belongs to Pteridospermophyta'
- 'Diplotheca stellata belongs to Diplotheca' according to Kidston 1903
- 'Diplotmema is a misspelling of Diplothmema'
- 'Diplothmema belongs to Pteridospermophyta'
- 'Diplothmema busqueti belongs to Diplothmema' according to Zeiller 1906
- 'Diplothmema busqueti is recombined as Pseudomariopteris busqueti' according to Danze-Corsin 1953
- 'Diploxylon belongs to Plantae'
- 'Diploxylon elegans belongs to Diploxylon' according to Corda 1840
- 'Dipteriphyllum belongs to Plantae'
- 'Dipteriphyllum cretaceum belongs to Dipteriphyllum' according to Velenovsky 1896
- 'Dipterites belongs to Plantae'
- 'Dipterocarpaceophyllum belongs to Dipterocarpaceae'
- 'Dipterocarpaceophyllum sumatrense belongs to Dipterocarpaceophyllum' according to Kraeusel 1929
- 'Dipterocarpophyllum belongs to Dipterocarpaceae'
- 'Dipterocarpophyllum gregoryi belongs to Dipterocarpophyllum' according to Edwards 1923
- 'Dipterocarpoxylon belongs to Dipterocarpaceae'
- 'Dipterocarpoxylon burmense belongs to Dipterocarpoxylon' according to Holden 1916
- 'Dipterocarpoxylon burmense is recombined as Irrawadioxylon burmense' according to Gupta 1936
- 'Dipterocarpoxylon tobleri belongs to Dipterocarpoxylon' according to Kraeusel 1922
- 'Dipterocarpoxylon tobleri is recombined as Dryobalanoxylon tobleri' according to Berger 1923
- 'Dipterospermum belongs to Bignoniaceae'
- 'Dipterospermum bignonioides belongs to Dipterospermum' according to Goeppert 1851
- 'Discinites belongs to Plantae'
- 'Discinites bohemicus belongs to Discinites' according to Feistmantel 1880
- 'Discites belongs to Marchantiophyta'
- 'Discites minutus belongs to Discites' according to Harris 1931
- 'Discoascina belongs to Plantae'
- 'Discoascina perforata belongs to Discoascina' according to Benes 1961
- 'Discoasteridae belongs to Haptophyta'
- 'Discomycetes belongs to Fungi'
- 'Disconodinium belongs to Dinophyceae'
- 'Discophorites belongs to Plantae'
- 'Discophorites angustilobus belongs to Discophorites' according to Heer 1877
- 'Discophycus belongs to Plantae'
- 'Discophycus typicalis belongs to Discophycus' according to Walcott 1883
- 'Discophyllum belongs to Problematica'
- 'Discopteris belongs to Pteridophyta'
- 'Discopteris karwinensis belongs to Discopteris' according to Stur 1883
- 'Discostachys belongs to Plantae'
- 'Discostachys cebennensis belongs to Discostachys' according to Grand'Eury 1890
- 'Discostrobus belongs to Plantae'
- 'Discostrobus argunensis belongs to Discostrobus' according to Krasser 1906
- 'Disoma belongs to Chrysomonads'
- 'Disorus belongs to Plantae'
- 'Disorus nimakanensis belongs to Disorus' according to Vakhrameev 1962
- 'Disphaeria belongs to Acritarcha'
- 'Disphaeria macropyla belongs to Disphaeria' according to Cookson and Eisenack 1960
- 'Disphaerogena belongs to Acritarcha'
- 'Disphenophyllum belongs to Plantae'
- 'Disphenophyllum romerii belongs to Disphenophyllum' according to Solms-Laubach 1909
- 'Dissocladella belongs to Dasycladaceae'
- 'Dissocladella savitriae belongs to Dissocladella' according to Pia 1936
- 'Distichophyllites belongs to Coniferales'
- 'Distichophyllites microphyllus belongs to Distichophyllites' according to Dusen 1899
- 'Distichophytum belongs to Psilophytales'
- 'Distichophytum mucronatum belongs to Distichophytum' according to Maegdefrau 1938
- 'Distichopteris belongs to Pteridophyta'
- 'Distichopteris heteropinna belongs to Distichopteris' according to Yabe and Shimakura 1940
- 'Distichostrobus belongs to Myricaceae'
- 'Distichostrobus pusillus belongs to Distichostrobus' according to Velenovsky and Viniklar 1929
- 'Distrigophyllum belongs to Lycopodophyta'
- 'Distrigophyllum bicarinatum belongs to Distrigophyllum' according to Lindley and Hutton 1876
- 'Dizeugotheca belongs to Pteropsida'
- 'Dizeugotheca waltonii belongs to Dizeugotheca' according to Archangelsky and de la Sota 1960
- 'Djambioxylon belongs to Sapindaceae'
- 'Djambioxylon sumatrense belongs to Djambioxylon' according to Kraeusel 1922
- 'Dobrogeites belongs to Plantae'
- 'Dobrogeites vinassayi belongs to Dobrogeites' according to Simionescu 1940
- 'Dodonaeaecarpum belongs to Angiospermae'
- 'Dodonaeaecarpum hungaricum belongs to Dodonaeaecarpum' according to Andreanszky 1956
- 'Dodonaeites belongs to Sapindaceae'
- 'Dolatophycus belongs to Plantae'
- 'Dolatophycus expansus belongs to Dolatophycus' according to Fenton and Fenton 1937
- 'Dolerophyllum belongs to Plantae'
- 'Doleropteris belongs to Pteridophyta'
- 'Doleropteris cuncata belongs to Doleropteris' according to Grand'Eury 1877
- 'Dolerotheca belongs to Whittleseyinae'
- 'Dolerotheca fertilis belongs to Dolerotheca' according to Renault 1933
- 'Dolichites belongs to Plantae'
- 'Dolichites europaeus belongs to Dolichites' according to Unger 1850
- 'Dolichosperma belongs to Pteridospermophyta'
- 'Dolichosperma sexangulatum belongs to Dolichosperma' according to Long 1961
- 'Doliostrobus belongs to Coniferales'
- 'Domasia belongs to Acritarcha'
- 'Domasia trispinosa belongs to Domasia' according to Downie 1960
- 'Dombeyopsis is a nomen nudum'
- 'Dombeyoxylon aegyptiacum belongs to Dombeyoxylon' according to Schenk 1883
- 'Donacites belongs to Scitamineae'
- 'Donacites erdobenyensis belongs to Donacites' according to Cziffrey-Szilagyi 1955
- 'Donezella lutugini belongs to Donezella' according to Maslov 1929
- 'Doratophyllum belongs to Cycadophyta'
- 'Doratophyllum astartensis belongs to Doratophyllum' according to Harris 1932
- 'Doryanthites belongs to Monocotyledoneae'
- 'Dorycordaites belongs to Cordaitales'
- 'Dorycordaites palmaeformis belongs to Dorycordaites' according to Goeppert 1888
- 'Dothidites belongs to Fungi'
- 'Dothidites acericola belongs to Dothidites' according to Heer 1892
- 'Dracaenites belongs to Monocotyledoneae'
- 'Dracaenites sepultus belongs to Dracaenites' according to Saporta 1861
- 'Dracaenophyllum belongs to Plantae'
- 'Dracaenophyllum venetum belongs to Dracaenophyllum' according to Massalongo 1858
- 'Dracodinium belongs to Dinoflagellata'
- 'Dracodinium solidum belongs to Dracodinium' according to Gocht 1955
- 'Dracontocarya belongs to Anacardiaceae'
- 'Draffania belongs to Problematica'
- 'Draffania biloba belongs to Draffania' according to Cummings 1957
- 'Drepanolepis belongs to Plantae'
- 'Drepanolepis angustior belongs to Drepanolepis' according to Nathorst 1897
- 'Drepanophycus belongs to Psilophytophyta'
- 'Drepanophycus spinaeformis belongs to Drepanophycus' according to Goeppert 1852
- 'Drimysophyllum belongs to Magnoliaceae'
- 'Drimysophyllum succineum belongs to Drimysophyllum' according to Kirchheimer 1937
- 'Drupa belongs to Plantae'
- 'Drupa rhabdosperma belongs to Drupa' according to Lesquereux 1861
- 'Dryandroides belongs to Proteaceae'
- 'Dryandroides grandis belongs to Dryandroides' according to Unger 1850
- 'Dryandrophyllum belongs to Plantae'
- 'Dryandrophyllum cretaceum belongs to Dryandrophyllum' according to Velenovsky 1889
- 'Drydenia belongs to Plantae'
- 'Drydenia foliata belongs to Drydenia' according to Fry and Banks 1955
- 'Dryobalanoxylon belongs to Angiospermae'
- 'Dryobalanus belongs to Fagaceae'
- 'Dryobalanus basalticus belongs to Dryobalanus' according to Landgrebe 1842
- 'Dryophyllum belongs to Angiospermae'
- 'Dryophyllum subcretaceum belongs to Dryophyllum' according to Saporta 1865
- 'Dryopterites belongs to Polypodiaceae'
- 'Dryoxylon belongs to Magnoliopsida'
- 'Dryoxylon chitaense belongs to Dryoxylon' according to Yasui 1928
- 'Dryoxylon jenense belongs to Dryoxylon' according to Schleiden 1853
- 'Dryoxylon symphonioides belongs to Dryoxylon' according to Bancroft 1932
- 'Dryoxylon symphonioides is recombined as Guttiferoxylon symphonioides' according to Kraeusel 1939
- 'Dubiocarpon belongs to Plantae'
- 'Dubiocarpon elegans belongs to Dubiocarpon' according to Williamson 1955
- 'Duisbergia belongs to Plantae'
- 'Duisbergia mirabilis belongs to Duisbergia' according to Kraeusel and Weyland 1929
- 'Dulaurensia belongs to Epacridaceae'
- 'Dulaurensia pulchra belongs to Dulaurensia' according to Reid 1930
- 'Dunstania belongs to Cornaceae'
- 'Durania belongs to Symplocaceae'
- 'Durania ehrenbergi belongs to Durania' according to Kirchheimer 1935
- 'Durvillides belongs to Plantae'
- 'Durvillides eocenicus belongs to Durvillides' according to Squinabol 1888
- 'Dutoitia belongs to Psilophytales'
- 'Dutoitia pulchra belongs to Dutoitia' according to Hoeg 1931
- 'Duvernaysphaera belongs to Dinophyceae'
- 'Dvinella belongs to Dasycladaceae'
- 'Dvinella comata belongs to Dvinella' according to Khvorova 1949
- 'Dvinopteridium belongs to Pteridophyta'
- 'Dvinopteridium edemskii belongs to Dvinopteridium' according to Zalessky 1937
- 'Dyctuocaulus belongs to Plantae'
- 'Dyotheca belongs to Plantae'
- 'Dyotheca aspera belongs to Dyotheca' according to Brongniart 1938
- 'Dystachophycus belongs to Problematica'
- 'Dystachophycus mamillanum belongs to Dystachophycus' according to Miller and Dyer 1878
- 'Ebenacites belongs to Ebenaceae'
- 'Ebenacites rugosus belongs to Ebenacites' according to Saporta 1861
- 'Ebenoxylon belongs to Plantae'
- 'Ebenoxylon diospyroides belongs to Ebenoxylon' according to Felix 1882
- 'Eboracia belongs to Pteridophyta'
- 'Eboracia lobifolia belongs to Eboracia' according to Phillips 1911
- 'Ebriella belongs to Problematica'
- 'Ebriella hannai belongs to Ebriella' according to Deflandre 1934
- 'Ebrinula belongs to Problematica'
- 'Ebrinula paradoxa belongs to Ebrinula' according to Hovasse 1950
- 'Eccroutosperma belongs to Pteridospermophyta'
- 'Eccroutosperma langtonense belongs to Eccroutosperma' according to Long 1961
- 'Echinocarpeopsis belongs to Violales'
- 'Echinocarpeopsis fastigata belongs to Echinocarpeopsis' according to Langeron 1900
- 'Echinocarpus is replaced by Exechinocarpus' according to Dayal 1965
- 'Echinochara belongs to Charophyta'
- 'Echinochara spinosa belongs to Echinochara' according to Peck 1957
- 'Echinostachys belongs to Plantae'
- 'Echinostachys oblongus belongs to Echinostachys' according to Brongniart 1828
- 'Echinostipes belongs to Plantae'
- 'Echinostrobus belongs to Coniferales'
- 'Echinostrobus squamosus is recombined as Strobilostrobus squamosus' according to Bayer 1914
- 'Echinostrobus squamosus is replaced by Strobilostrobus velenovskyanus' according to Bayer 1914
- 'Echinostrobus squamosus belongs to Echinostrobus' according to Velenovsky 1889
- 'Echinostrobus sternbergii belongs to Echinostrobus' according to Schimper 1870
- 'Echitonium belongs to Plantae'
- 'Echitonium superstes belongs to Echitonium' according to Unger 1839
- 'Edelstenia belongs to Plantae'
- 'Edelstenia mongolica belongs to Edelstenia' according to Vologdin 1940
- 'Edenoxylon belongs to Anacardiaceae'
- 'Edenoxylon parviareolatum belongs to Edenoxylon' according to Kruse 1954
- 'Edraxylon belongs to Sphenopteridae'
- 'Ehretiaecarpum belongs to Boraginaceae'
- 'Ehretiaecarpum parvulum belongs to Ehretiaecarpum' according to Menzel 1913
- 'Eichwaldia belongs to Plantae'
- 'Eichwaldia biarmica belongs to Eichwaldia' according to Zalessky 1927
- 'Eisdenia belongs to Plantae'
- 'Eisdenia aacheniana belongs to Eisdenia' according to Stockmans 1936
- 'Eisenackia crassitabulata belongs to Eisenackia' according to Deflandre and Cookson 1955
- 'Eisothecaryon belongs to Plantae'
- 'Eisothecaryon semiseptatum belongs to Eisothecaryon' according to Mueller 1877
- 'Elaeagnites belongs to Plantae'
- 'Elaeagnites campanulatus belongs to Elaeagnites' according to Heer 1870
- 'Elaeocarpeopsis belongs to Violales'
- 'Elaeocarpeopsis decora belongs to Elaeocarpeopsis' according to Langeron 1900
- 'Elaeocarpites belongs to Plantae'
- 'Elaeocarpoxylon belongs to Elaeocarpaceae'
- 'Elaeodendroxylon belongs to Plantae'
- 'Elaeodendroxylon polymorphum belongs to Elaeodendroxylon' according to Platen 1908
- 'Elaioides belongs to Oleaceae'
- 'Elaioides fontanesia belongs to Elaioides' according to Unger 1850
- 'Elasmophycos belongs to Plantae'
- 'Elatides belongs to Coniferales'
- 'Elatides brandtiana belongs to Elatides' according to Heer 1876
- 'Elatides falcata belongs to Elatides' according to Heer 1876
- 'Elatides ovalis belongs to Elatides' according to Heer 1876
- 'Elatocladus belongs to Coniferophyta'
- 'Elatocladus heterophylla belongs to Elatocladus' according to Halle 1913
- 'Elatoxylon belongs to Plantae'
- 'Eleoxylon belongs to Coniferophyta'
- 'Eleutherophyllum belongs to Plantae'
- 'Eleutherophyllum mirabile belongs to Eleutherophyllum' according to Sternberg 1877
- 'Ellipsoidictyum belongs to Dinophyceae'
- 'Eltovaria belongs to Pteridospermophyta'
- 'Eltovaria bursiformis belongs to Eltovaria' according to White 1929
- 'Embolianthemum belongs to Plantae'
- 'Embolianthemum truncatum belongs to Embolianthemum' according to Corda 1874
- 'Embothriophyllum belongs to Proteaceae'
- 'Embothriopsis belongs to Proteaceae'
- 'Embothriopsis presagita belongs to Embothriopsis' according to Hollick 1912
- 'Embothrites belongs to Proteaceae'
- 'Embothrites borealis belongs to Embothrites' according to Unger 1850
- 'Emplectopteridium belongs to Pteridophyta'
- 'Emplectopteridium alatum belongs to Emplectopteridium' according to Kawasaki 1934
- 'Emplectopteris belongs to Pteridospermophyta'
- 'Emplectopteris triangularis belongs to Emplectopteris' according to Halle 1927
- 'Emslandia belongs to Dinoflagellata'
- 'Emslandia emslandensis belongs to Emslandia' according to Gerlach 1961
- 'Enantioblastos belongs to Loranthaceae'
- 'Enantioblastos viscoides belongs to Enantioblastos' according to Goeppert and Berendt 1845
- 'Enantiophyllites belongs to Leguminosae'
- 'Enantiophyllites sendelii belongs to Enantiophyllites' according to Goeppert and Berendt 1845
- 'Encephalartites belongs to Cycadophyta'
- 'Encephalartites leipzigii belongs to Encephalartites' according to Vakhrameev 1962
- 'Encephalartopsis belongs to Cycadophyta'
- 'Encephalartopsis nervosa belongs to Encephalartopsis' according to Fontaine 1889
- 'Encoelites belongs to Plantae'
- 'Encoelites mertensii belongs to Encoelites' according to Sternberg 1833
- 'Encoelocladium belongs to Plantae'
- 'Encoelocladium tortuosum belongs to Encoelocladium' according to Zigno 1856
- 'Endoa belongs to Parkeriaceae'
- 'Endoa ceratopteroides belongs to Endoa' according to Kimura 1959
- 'Endocalamites belongs to Sphenopsida'
- 'Endogenites belongs to Cycadophyta'
- 'Endogenites echinatus belongs to Endogenites' according to Brongniart 1822
- 'Endogenites erosa belongs to Endogenites' according to Stokes and Webb 1824
- 'Endogenites erosa is replaced by Sedgwickia yuccoides' according to Goeppert 1848
- 'Endogenophyllites is a nomen nudum'
- 'Endolepis belongs to Plantae'
- 'Endolepis vulgaris belongs to Endolepis' according to Schleiden 1846
- 'Endoxylon belongs to Calamopityaceae'
- 'Enfieldia belongs to Plantae'
- 'Enfieldia mutilata belongs to Enfieldia' according to Fry and Banks 1955
- 'Enigmocarpon belongs to Lythraceae'
- 'Enigmophyton belongs to Plantae'
- 'Enigmophyton superbum belongs to Enigmophyton' according to Hoeg 1942
- 'Eniseiella belongs to Plantae'
- 'Eniseiella asteroides belongs to Eniseiella' according to Maslov 1939
- 'Entandrophragmoxylon belongs to Plantae'
- 'Entandrophragmoxylon boureaui belongs to Entandrophragmoxylon' according to Louvet 1964
- 'Entomolepis belongs to Coniferales'
- 'Entomolepis cynarocephala belongs to Entomolepis' according to Saporta 1865
- 'Entoneuron belongs to Menispermaceae'
- 'Entoneuron melastomaceum belongs to Entoneuron' according to Geyler 1875
- 'Entophysalites belongs to Plantae'
- 'Entophysalites fossilis belongs to Entophysalites' according to Laristschev 1952
- 'Entosphaeroides belongs to Problematica'
- 'Entostromium belongs to Plantae'
- 'Enygmatostrobus belongs to Plantae'
- 'Enygmatostrobus dokturowskyi belongs to Enygmatostrobus' according to Kryshtofovich 1915
- 'Eoacanthocarpus belongs to Plantae'
- 'Eoacanthocarpus dobrilugkianus belongs to Eoacanthocarpus' according to Daber 1959
- 'Eoachras belongs to Sapotaceae'
- 'Eoachras eocenica belongs to Eoachras' according to Berry 1915
- 'Eoangiopteris belongs to Marattiaceae'
- 'Eoangiopteris andrewsii belongs to Eoangiopteris' according to Mamay 1950
- 'Eoastrion belongs to Problematica'
- 'Eochara belongs to Charophyta'
- 'Eochara wickendeni belongs to Eochara' according to Choquette 1956
- 'Eocladophora belongs to Plantae'
- 'Eocladophora fibrata belongs to Eocladophora' according to Fucini 1936
- 'Eoclathrus belongs to Plantae'
- 'Eoclathrus fenestratus belongs to Eoclathrus' according to Squinabol 1888
- 'Eoclepsydropsis is a nomen nudum'
- 'Eodinia belongs to Dinophyceae'
- 'Eodinia pachytheca belongs to Eodinia' according to Eisenack 1936
- 'Eodiscoaster belongs to Prymnesiophyceae'
- 'Eodiscoaster danicus belongs to Eodiscoaster' according to Martini 1961
- 'Eoepiphyton belongs to Cyanobacteria'
- 'Eoepiphyton jalgamicum belongs to Eoepiphyton' according to Butin 1959
- 'Eoeuryale belongs to Nymphaeaceae'
- 'Eoeuryale brasenioides belongs to Eoeuryale' according to Miki 1960
- 'Eogaspesiea belongs to Psilophytophyta'
- 'Eogaspesiea gracilis belongs to Eogaspesiea' according to Daber 1960
- 'Eoginkgoites belongs to Ginkgoales'
- 'Eoginkgoites sectoralis belongs to Eoginkgoites' according to Bock 1952
- 'Eoglobella belongs to Problematica'
- 'Eoglobella longipes belongs to Eoglobella' according to Bradley 1931
- 'Eoglyptostrobus belongs to Pinopsida'
- 'Eoglyptostrobus sabioides belongs to Eoglyptostrobus' according to Miki 1964
- 'Eogoniolina belongs to Dasycladaceae'
- 'Eogoniolina johnsoni belongs to Eogoniolina' according to Endo 1953
- 'Eohepatica belongs to Marchantiophyta'
- 'Eohepatica dyfriensis belongs to Eohepatica' according to Heard and Jones 1931
- 'Eohypserpa belongs to Menispermaceae'
- 'Eohypserpa parsoni belongs to Eohypserpa' according to Reid and Chandler 1933
- 'Eoliquidambar belongs to Hamamelidaceae'
- 'Eoliquidambar hordwellensis belongs to Eoliquidambar' according to Chandler 1961
- 'Eolirion belongs to Palmae'
- 'Eolirion primigenium belongs to Eolirion' according to Schenk 1869
- 'Eomastixia belongs to Cornaceae'
- 'Eomastixia bilocularis belongs to Eomastixia' according to Chandler 1926
- 'Eomizzia belongs to Dasycladaceae'
- 'Eomizzia igoi belongs to Eomizzia' according to Endo and Horiguchi 1957
- 'Eophyton belongs to Problematica'
- 'Eophyton linnaeanum belongs to Eophyton' according to Torell 1867
- 'Eopseudoceratium belongs to Plantae'
- 'Eopseudoceratium gochti belongs to Eopseudoceratium' according to Neale and Sarjeant 1962
- 'Eopteridangium belongs to Plantae'
- 'Eopteridangium dictyosporum belongs to Eopteridangium' according to Andrews and Agashe 1963
- 'Eopteris belongs to Plantae'
- 'Eopteris andegavensis belongs to Eopteris' according to Saporta 1878
- 'Eopuntia belongs to Cactaceae'
- 'Eorhachis belongs to Pteridophyta'
- 'Eorhachis lomarioides belongs to Eorhachis' according to Arnold 1945
- 'Eorhamnidium belongs to Rhamnaceae'
- 'Eorhamnidium cretaceum belongs to Eorhamnidium' according to Berry 1919
- 'Eosperma belongs to Lagenostomales'
- 'Eosperma oxroadense belongs to Eosperma' according to Barnard 1959
- 'Eospermatopteris textilis belongs to Eospermatopteris' according to Dawson 1924
- 'Eosphaera belongs to Problematica'
- 'Eostrobilus belongs to Plantae'
- 'Eostrobilus gelisii belongs to Eostrobilus' according to Theron 1900
- 'Eotaxites belongs to Plantae'
- 'Eotrapa belongs to Hydrocharitaceae'
- 'Eozanthoxylon belongs to Rutaceae'
- 'Eozanthoxylon glandulosum belongs to Eozanthoxylon' according to Reid and Chandler 1933
- 'Epacridicarpum belongs to Symplocaceae'
- 'Epacridicarpum mudense belongs to Epacridicarpum' according to Chandler 1960
- 'Epacridiphyllum belongs to Ericaceae'
- 'Epacridiphyllum quinquenervium belongs to Epacridiphyllum' according to Velenovsky and Viniklar 1931
- 'Ephedrites belongs to Ephedraceae'
- 'Ephedrites johnianus belongs to Ephedrites' according to Goeppert and Berendt 1845
- 'Ephedropsis belongs to Taxodiaceae'
- 'Ephedropsis strobilifera belongs to Ephedropsis' according to Velenovsky and Viniklar 1926
- 'Epicephalopyxis belongs to Acritarcha'
- 'Epicephalopyxis adhaerens belongs to Epicephalopyxis' according to Deflandre 1935
- 'Epicephalopyxis spectabilis belongs to Epicephalopyxis' according to Deflandre and Cookson 1955
- 'Epicephalopyxis spectabilis is recombined as Wanaea spectabilis' according to Cookson and Eisenack 1958
- 'Epiphyton belongs to Problematica'
- 'Epiphyton flabellatum belongs to Epiphyton' according to Bornemann 1886
- 'Epiplosphaera belongs to Dinophyceae'
- 'Epiplosphaera bireticulata belongs to Epiplosphaera' according to Klement 1960
- 'Epipolaia belongs to Plantae'
- 'Epipolaia boweri belongs to Epipolaia' according to Bertrand 1898
- 'Equihenia belongs to Ichnofossils'
- 'Equihenia rugosa belongs to Equihenia' according to Meunier 1886
- 'Equisetides belongs to Plantae'
- 'Equisetides giganteus belongs to Equisetides' according to Lindley and Hutton 1869
- 'Equisetina belongs to Plantae'
- 'Equisetina magnivaginata belongs to Equisetina' according to Zalessky 1939
- 'Equisetinae belongs to Sphenophyta'
- 'Equisetinostachys belongs to Plantae'
- 'Equisetites lingulatus belongs to Equisetites' according to Germar 1845
- 'Equisetites lingulatus is recombined as Calamariophyllum lingulatum' according to Hirmer 1927
- 'Equisetites muensteri belongs to Equisetites' according to Sternberg 1833
- 'Equisetostachys is a nomen nudum'
- 'Equisetum brachyodon belongs to Equisetum' according to Brongniart 1822
- 'Equisetum brachyodon is replaced by Callitrites brongniartii' according to Endlicher 1847
- 'Eremiodendron belongs to Plantae'
- 'Eremophyllum belongs to Angiospermae'
- 'Eremopteris artemisiaefolia belongs to Eremopteris' according to Sternberg 1869
- 'Eretmonia belongs to Glossopteridaceae'
- 'Eretmonia natalensis belongs to Eretmonia' according to DuToit 1932
- 'Eretmophyllum belongs to Ginkgoales'
- 'Eretmophyllum pubescens belongs to Eretmophyllum' according to Thomas 1914
- 'Ericaceoxylon belongs to Plantae'
- 'Ericaceoxylon parenchymatosum belongs to Ericaceoxylon' according to van der Burgh 1964
- 'Ericiphyllum belongs to Ericaceae'
- 'Ericiphyllum ternatum belongs to Ericiphyllum' according to Conwentz 1886
- 'Eriotesta belongs to Plantae'
- 'Eriotesta velutina belongs to Eriotesta' according to Brongniart 1874
- 'Erisiphites belongs to Fungi'
- 'Erisiphites melilli belongs to Erisiphites' according to Pampaloni 1902
- 'Eristophyton belongs to Cordaitales'
- 'Eristophyton beinertianum belongs to Eristophyton' according to Goeppert 1911
- 'Ernestia is replaced by Ernestiodendron' according to Florin 1934
- 'Ernestia filiciformis belongs to Ernestia' according to Schlotheim 1927
- 'Ernestia filiciformis is recombined as Ernestiodendron filiciforme' according to Florin 1934
- 'Ernestiodendron belongs to Coniferales'
- 'Ervites belongs to Leguminosae'
- 'Ervites primaevus belongs to Ervites' according to Saporta 1862
- 'Erysiphites belongs to Pyrenomycetae'
- 'Erysiphites protogaeus belongs to Erysiphites' according to Schmalhausen 1898
- 'Erythrinoxylon belongs to Plantae'
- 'Erythrinoxylon latiporosum belongs to Erythrinoxylon' according to Falqui 1907
- 'Erythrospermophyllum belongs to Flacourtiaceae'
- 'Erythrospermophyllum ipolytarnocense belongs to Erythrospermophyllum' according to Rasky 1965
- 'Escalloniiphyllum belongs to Saxifragales'
- 'Escallonites belongs to Plantae'
- 'Eskdalia belongs to Pteridophyta'
- 'Eskdalia minuta belongs to Eskdalia' according to Kidston 1903
- 'Estiastra belongs to Acritarcha'
- 'Estiastra magna belongs to Estiastra' according to Eisenack 1959
- 'Estomia belongs to Plantae'
- 'Estomia similis belongs to Estomia' according to Meyen 1965
- 'Etapteris belongs to Coenopteridales'
- 'Eterodictyon belongs to Plantae'
- 'Eterodictyon textum belongs to Eterodictyon' according to Heer 1881
- 'Etheridgea belongs to Tiliaceae'
- 'Etheridgea subglobosa belongs to Etheridgea' according to Ettingshausen 1893
- 'Ettingshausenia belongs to Angiospermae'
- 'Eucalyptophyllum belongs to Myrtaceae'
- 'Eucalyptophyllum oblongifolium belongs to Eucalyptophyllum' according to Fontaine 1889
- 'Eucarpinoxylon belongs to Betulaceae'
- 'Eucaryoxylon belongs to Plantae'
- 'Eucaryoxylon crystallophorum belongs to Eucaryoxylon' according to Mueller-Stoll and Maedel 1960
- 'Eudaphniphyllum belongs to Thymelaeaceae'
- 'Eudaphniphyllum nathorsti belongs to Eudaphniphyllum' according to Conwentz 1886
- 'Eugeinitzia belongs to Coniferales'
- 'Eugeinitzia proxima belongs to Eugeinitzia' according to Hollick and Jeffrey 1909
- 'Eugeniaites belongs to Myrtaceae'
- 'Eugeniaites princeps belongs to Eugeniaites' according to Loubiere 1933
- 'Eugonophyllum belongs to Codiaceae'
- 'Eugonophyllum johnsonii belongs to Eugonophyllum' according to Konishi and Wray 1961
- 'Eulepidophloios belongs to Plantae'
- 'Eulepidophloios laricinus belongs to Eulepidophloios' according to Sternberg 1907
- 'Eumuensteria belongs to Problematica'
- 'Eupecopteris belongs to Filicinae'
- 'Eupecopteris bucklandi belongs to Eupecopteris' according to Brongniart 1925
- 'Euphorbiofolium belongs to Euphorbiaceae'
- 'Euphorbiofolium hellbergi belongs to Euphorbiofolium' according to Kilpper 1960
- 'Euphorbioides belongs to Euphorbiaceae'
- 'Euphorbioides prisca belongs to Euphorbioides' according to Weber 1855
- 'Euphorbiophloios belongs to Euphorbiaceae'
- 'Euphorbiophloios sezannensis belongs to Euphorbiophloios' according to Langeron 1899
- 'Euphorbiophyllum belongs to Euphorbiaceae'
- 'Euphorbiophyllum stillingioides belongs to Euphorbiophyllum' according to Ettingshausen 1853
- 'Euphorbiospermum belongs to Euphorbiaceae'
- 'Euphorbiospermum oecenicum belongs to Euphorbiospermum' according to Reid and Chandler 1933
- 'Euphorbiotheca belongs to Euphorbiaceae'
- 'Euphorbiotheca sheppeyensis belongs to Euphorbiotheca' according to Reid and Chandler 1933
- 'Euphorbioxylon belongs to Euphorbiaceae'
- 'Euphorbioxylon speciosum belongs to Euphorbioxylon' according to Felix 1887
- 'Euphorbites belongs to Sigillariaceae'
- 'Euphorbites cicatricosus belongs to Euphorbites' according to Martius 1822
- 'Euphorbocarpum belongs to Euphorbiaceae'
- 'Euphorbocarpum richardsoni belongs to Euphorbocarpum' according to Knowlton 1917
- 'Euphoriaecarpum belongs to Sapindaceae'
- 'Euphoriaecarpum litchiforme belongs to Euphoriaecarpum' according to Menzel 1913
- 'Euphoriopsis belongs to Sapindaceae'
- 'Euphoriopsis phaetontis belongs to Euphoriopsis' according to Massalongo 1852
- 'Eupsaronius belongs to Marattiales'
- 'Europoxylon belongs to Coniferales'
- 'Europoxylon tubulosum belongs to Europoxylon' according to Vogellehner 1965
- 'Eurotites belongs to Pyrenomycetae'
- 'Eurotium elegans belongs to Eurotium' according to Goeppert and Menge 1853
- 'Eurotium elegans is recombined as Eurotites elegans' according to Meschinelli 1892
- 'Eurycycadolepis belongs to Cycadophyta'
- 'Euryphyllum belongs to Plantae'
- 'Euryphyllum whittianum belongs to Euryphyllum' according to Feistmantel 1879
- 'Eurysacis belongs to Coniferophyta'
- 'Eurysolenpora belongs to Problematica'
- 'Eurysolenpora polypora belongs to Eurysolenpora' according to Quenstedt 1930
- 'Euryspatha belongs to Ginkgoales'
- 'Euryspatha rarinervis belongs to Euryspatha' according to Prinada 1956
- 'Eurystoma belongs to Pteridospermophyta'
- 'Eurystoma angulare belongs to Eurystoma' according to Long 1960
- 'Eusarcophyllum belongs to Lycopodophyta'
- 'Eusarcophyllum amadocum belongs to Eusarcophyllum' according to Zalessky 1933
- 'Eusphenopteris belongs to Hymenophyllaceae'
- 'Eusphenopteris tenella belongs to Eusphenopteris' according to Brongniart 1882
- 'Euthythyrites belongs to Microthyriaceae'
- 'Euthythyrites oleinites belongs to Euthythyrites' according to Cookson 1947
- 'Euzebiola belongs to Plantae'
- 'Euzebiola clarkei belongs to Euzebiola' according to Sommer 1954
- 'Eviostachya hoegi belongs to Eviostachya' according to Stockmans 1948
- 'Evittodinium belongs to Dinoflagellata'
- 'Evittodinium giselae belongs to Evittodinium' according to Deflandre 1964
- 'Evodioxylon belongs to Angiospermae'
- 'Excipulites belongs to Hymenophyllaceae'
- 'Excipulites neesii belongs to Excipulites' according to Goeppert 1836
- 'Exechinocarpus belongs to Violales'
- 'Exflabellaria is a subjective synonym of Palmacites'
- 'Exogenites belongs to Plantae'
- 'Faboidea belongs to Leguminosae'
- 'Fagaroxylon belongs to Plantae'
- 'Fagaroxylon limburgense belongs to Fagaroxylon' according to van der Burgh 1964
- 'Fagites is a nomen nudum'
- 'Fagophyllum gottschei belongs to Fagophyllum' according to Nathorst 1888
- 'Fagopsis belongs to Fagaceae'
- 'Fagoxylon belongs to Plantae'
- 'Fagoxylon hokkaidense belongs to Fagoxylon' according to Stopes and Fujii 1910
- 'Falcia belongs to Fungi'
- 'Falcia ostraviensis belongs to Falcia' according to Benes 1956
- 'Falsebria belongs to Problematica'
- 'Falsebria ambigua belongs to Falsebria' according to Deflandre 1950
- 'Fanerotheca belongs to Pteridospermophyta'
- 'Farndalea belongs to Taxodiaceae'
- 'Farndalea fragilis belongs to Farndalea' according to Bose 1955
- 'Fasciculites belongs to Plantae'
- 'Fasciculites antiquensis belongs to Fasciculites' according to Unger 1846
- 'Fasciculites antiquensis is recombined as Xylois antiquensis' according to Stenzel 1872
- 'Fasciculites densus belongs to Fasciculites' according to Unger 1850
- 'Fasciculites densus is recombined as Pycnois densa' according to Stenzel 1872
- 'Fasciculites didymosolen belongs to Fasciculites' according to Sprengel 1832
- 'Fasciostelopteris belongs to Cyatheaceae'
- 'Fasciostelopteris tansleii belongs to Fasciostelopteris' according to Stopes and Fujii 1910
- 'Fascisvarioxylon belongs to Cycadaceae'
- 'Fascisvarioxylon mehtae belongs to Fascisvarioxylon' according to Jain 1964
- 'Fascites belongs to Plantae'
- 'Favilarnax belongs to Dinophyceae'
- 'Favilarnax ovulum belongs to Favilarnax' according to Sarjeant 1963
- 'Favularia is a subjective synonym of Sigillaria'
- 'Favularia obovata belongs to Favularia' according to Sternberg 1825
- 'Fayolia dentata belongs to Fayolia' according to Renault and Zeiller 1884
- 'Fegonium belongs to Plantae'
- 'Fegonium vaculasum belongs to Fegonium' according to Unger 1847
- 'Feildenia belongs to Plantae'
- 'Feildenia nordenskioldi belongs to Feildenia' according to Nathorst 1897
- 'Feildenia nordenskioldi is recombined as Pseudotorellia nordenskioldi' according to Florin 1936
- 'Feildenia rigida belongs to Feildenia' according to Heer 1878
- 'Feildeniopsis belongs to Plantae'
- 'Feildeniopsis crassinervis belongs to Feildeniopsis' according to Fontaine 1889
- 'Feistmantelia is a nomen nudum'
- 'Feistmantelia belongs to Pinopsida'
- 'Feistmantelia is replaced by Ottokaria' according to Zeiller 1902
- 'Feistmantelia bengalensis is recombined as Ottokaria bengalensis' according to Zeiller 1902
- 'Feistmantelia bengalensis belongs to Feistmantelia' according to Zeiller 1902
- 'Feistmantelia oblonga belongs to Feistmantelia' according to Ward 1899
- 'Felixia belongs to Leguminosae'
- 'Felixia latiradiata belongs to Felixia' according to Platen 1908
- 'Ferganella belongs to Dasycladaceae'
- 'Ferganella asiatica belongs to Ferganella' according to Maslov 1955
- 'Feronia belongs to Plantae'
- 'Feronia sewardi belongs to Feronia' according to Carpentier 1927
- 'Feruglioa belongs to Corystospermaceae'
- 'Fezzania belongs to Apocynaceae'
- 'Fezzania calanchoensis belongs to Fezzania' according to Boureau 1956
- 'Fichtelites belongs to Leguminosae'
- 'Fichtelites articulatus belongs to Fichtelites' according to Unger 1842
- 'Ficofolium belongs to Moraceae'
- 'Ficofolium weylandi belongs to Ficofolium' according to Peters 1963
- 'Ficoidites belongs to Lycopsida'
- 'Ficoidites verrucosus belongs to Ficoidites' according to Artis 1825
- 'Ficonium belongs to Moraceae'
- 'Ficonium solandri belongs to Ficonium' according to Ettingshausen 1883
- 'Ficophyllum belongs to Angiospermae'
- 'Ficophyllum crassinerve belongs to Ficophyllum' according to Fontaine 1889
- 'Ficoxylon belongs to Moraceae'
- 'Ficoxylon bohemicum belongs to Ficoxylon' according to Kaiser 1880
- 'Ficus aligera is recombined as Citrophyllum aligerum' according to Berry 1909
- 'Filiciphyllum belongs to Pteridophyta'
- 'Filiciphyllum dentatum belongs to Filiciphyllum' according to Velenovsky and Viniklar 1931
- 'Filicites belongs to Pteridophyta'
- 'Filicites arborescens belongs to Filicites' according to Schlotheim 1820
- 'Filicites arborescens is recombined as Cyathocarpus arborescens' according to Weiss 1869
- 'Filicites cyatheus belongs to Filicites' according to Schlotheim 1820
- 'Filicites elegans belongs to Filicites' according to Brongniart 1822
- 'Filicites elegans is recombined as Sphenopteris elegans' according to Sternberg 1825
- 'Filicites lonchiticus is recombined as Alethopteris lonchiticus' according to Sternberg 1825
- 'Filicites lonchiticus belongs to Filicites' according to Schlotheim 1804
- 'Filicites nilssoniana belongs to Filicites' according to Brongniart 1825
- 'Filicites nilssoniana is recombined as Sagenopteris nilssoniana' according to Presl 1838
- 'Filicites pennaeformis belongs to Filicites' according to Brongniart 1822
- 'Filicites pennaeformis is recombined as Pecopteris pennaeformis' according to Sternberg 1825
- 'Filicites polybotrya belongs to Filicites' according to Brongniart 1836
- 'Filicites polybotrya is recombined as Staphylopteris polybotrya' according to Presl 1838
- 'Filicites scolopendrioides is recombined as Scolopendrites scolopendrioides' according to Goeppert 1836
- 'Filicites scolopendrioides is recombined as Reussia scolopendrioides' according to Presl 1838
- 'Filisphaeridium belongs to Acritarcha'
- 'Fittonia belongs to Cycadophyta'
- 'Fittonia squamata belongs to Fittonia' according to Carruthers 1870
- 'Fittonites belongs to Plantae'
- 'Flabellaria is replaced by Exflabellaria' according to La Motte 1952
- 'Flabellaria is a subjective synonym of Palmacites'
- 'Flabellaria borassifolia belongs to Flabellaria' according to Sternberg 1822
- 'Flabellaria borassifolia is recombined as Neozamia borassifolia' according to Pomel 1846
- 'Flabellaria borassifolia is recombined as Pychnophyllum borassifolia' according to Brongniart 1849
- 'Flabellaria borassifolia is recombined as Cordaites borassifolia' according to Unger 1850
- 'Flabellaria raphifolia belongs to Flabellaria' according to Sternberg 1821
- 'Flabellicula belongs to Angiospermae'
- 'Flabellicula anglica belongs to Flabellicula' according to Reid and Chandler 1926
- 'Flabellochara belongs to Charophyta'
- 'Flabellophycos belongs to Plantae'
- 'Flabellophycos ligusticus belongs to Flabellophycos' according to Squinabol 1890
- 'Flemingites belongs to Lycopodophyta'
- 'Flemingites gracilis belongs to Flemingites' according to Carruthers 1865
- 'Flicheia belongs to Pteridophyta'
- 'Flicheia esnostensis belongs to Flicheia' according to Pelourde 1908
- 'Florentinites belongs to Monocotyledonae'
- 'Florentinites arcuta belongs to Florentinites' according to Spegazzini 1924
- 'Florissantia belongs to Convolvulaceae'
- 'Florissantia physalis belongs to Florissantia' according to Knowlton 1916
- 'Floropteris belongs to Pteridophyta'
- 'Foerstia belongs to Problematica'
- 'Foerstia ohioensis belongs to Foerstia' according to White 1923
- 'Foliaceria belongs to Problematica'
- 'Foliaceria polymorpha belongs to Foliaceria' according to Vologdin 1962
- 'Foliophycus llanoensis belongs to Foliophycus' according to Johnson 1960
- 'Foliopteris belongs to Pteridophyta'
- 'Folium belongs to Plantae'
- 'Folium sectum belongs to Folium' according to Hofmann 1932
- 'Folliculites belongs to Ranunculaceae'
- 'Folliculites kaltennordhemensis belongs to Folliculites' according to Zenker 1833
- 'Fontainea belongs to Leguminosae'
- 'Fontainea grandifolia belongs to Fontainea' according to Newberry 1895
- 'Foralites belongs to Plantae'
- 'Foralites pomeli belongs to Foralites' according to Rouault 1850
- 'Forbesia belongs to Pteridophyta'
- 'Forbesia cancellata belongs to Forbesia' according to Johnson 1912
- 'Forchhammera belongs to Problematica'
- 'Forchhammera silurica belongs to Forchhammera' according to Goeppert 1859
- 'Forchhammerioxylon belongs to Capparidaceae'
- 'Forchhammerioxylon scleroticum belongs to Forchhammerioxylon' according to Kruse 1954
- 'Forskohleanthium belongs to Urticaceae'
- 'Forskohleanthium nudum belongs to Forskohleanthium' according to Conwentz 1886
- 'Fortisia belongs to Pteridophyta'
- 'Fortisia haidingeriana belongs to Fortisia' according to Visiani 1858
- 'Fraasia belongs to Sapindaceae'
- 'Fraasia sapindoides belongs to Fraasia' according to Unger 1850
- 'Fracastoria belongs to Plantae'
- 'Fracastoria clavaeformis belongs to Fracastoria' according to Massalongo 1858
- 'Fraena sanctihilairei belongs to Fraena' according to Rouault 1850
- 'Fraxinoxylon belongs to Oleaceae'
- 'Fraxinoxylon prambachense belongs to Fraxinoxylon' according to Hofmann 1952
- 'Frenelites belongs to Pinales'
- 'Frenelopsis belongs to Coniferophyta'
- 'Fricia belongs to Coniferales'
- 'Fricia nobilis belongs to Fricia' according to Velenovsky 1885
- 'Frimmersdorfia belongs to Helobiae'
- 'Frimmersdorfia natans belongs to Frimmersdorfia' according to Weyland 1959
- 'Frintonia belongs to Menispermaceae'
- 'Frintonia ornata belongs to Frintonia' according to Chandler 1961
- 'Fructus belongs to Plantae'
- 'Fructus polyspermus belongs to Fructus' according to Engelhardt 1877
- 'Frullanites is a nomen nudum'
- 'Fruticristatum belongs to Plantae'
- 'Fruticristatum iowense belongs to Fruticristatum' according to Webster 1920
- 'Fryopsis belongs to Neuropteridae'
- 'Fuchselia belongs to Coniferales'
- 'Fuchselia schimperi belongs to Fuchselia' according to Endlicher 1847
- 'Fucites is a nomen nudum'
- 'Fucoides belongs to Plantae'
- 'Fucoides was reranked as Marchantites (Fucoides) and belongs to Marchantites' according to Leckenby 1864
- 'Fucoides acutus belongs to Fucoides' according to Germar and Kaulfuss 1831
- 'Fucoides acutus is recombined as Aphlebia acuta' according to Presl 1838
- 'Fucoides circinnatus belongs to Fucoides' according to Brongniart 1828
- 'Fucoides circinnatus is recombined as Alectorurus circinnatus' according to Schimper 1869
- 'Fucoides dentatus is recombined as Amansites dentatus' according to Brongniart 1849
- 'Fucoides flabellaris belongs to Fucoides' according to Brongniart 1828
- 'Fucoides flabellaris is recombined as Zonarites flabellaris' according to Sternberg 1833
- 'Fucoides lamourouxii belongs to Fucoides' according to Brongniart 1828
- 'Fucoides lamourouxii is recombined as Delesserites lamourouxii' according to Sternberg 1833
- 'Fucoides lycopodioides belongs to Fucoides' according to Brongniart 1828
- 'Fucoides lycopodioides is recombined as Caulerpites lycopodioides' according to Brongniart 1833
- 'Fucoides obtusus is recombined as Gigartinites obtusus' according to Brongniart 1849
- 'Fucoides obtusus belongs to Fucoides' according to Brongniart 1828
- 'Fucoides obtusus is replaced by Aralianthea brongniarti' according to Massalongo 1893
- 'Fucoides orbignianus belongs to Fucoides' according to Brongniart 1823
- 'Fucoides strictus belongs to Fucoides' according to Agardh and Brongniart 1822
- 'Fucoides strictus is recombined as Rhodomelites strictus' according to Sternberg 1833
- 'Fucoides targionii belongs to Fucoides' according to Brongniart 1828
- 'Fucoides targionii is recombined as Chondrites targionii' according to von Sternberg 1833
- 'Fucoides tuberculosus belongs to Fucoides' according to Brongniart 1828
- 'Fucoides tuberculosus is recombined as Laminarites tuberculosus' according to Sternberg 1833
- 'Fucoides turbinatus is recombined as Codonophora turbinatus' according to Massalongo 1857
- 'Fucoides turbinatus belongs to Fucoides' according to Brongniart 1823
- 'Fungites belongs to Fungi'
- 'Fungites apoldensis belongs to Fungites' according to Hallier 1865
- 'Furcifolium belongs to Ginkgophyta'
- 'Furcifolium longifolium belongs to Furcifolium' according to Seward 1943
- 'Furcoporella belongs to Dasycladaceae'
- 'Furcoporella diplopora belongs to Furcoporella' according to Pia 1918
- 'Furcula belongs to Angiospermae'
- 'Furcula granulifer belongs to Furcula' according to Harris 1932
- 'Furqueia belongs to Plantae'
- 'Furqueia angladae belongs to Furqueia' according to Frenguelli 1954
- 'Fusidites belongs to Fungi'
- 'Galea belongs to Dinophyceae'
- 'Galea galea belongs to Galea' according to Maier 1959
- 'Galla belongs to Fagaceae'
- 'Galla quercina belongs to Galla' according to Lesquereux 1892
- 'Gallatinia belongs to Plantae'
- 'Gallatinia pertexa belongs to Gallatinia' according to Walcott 1914
- 'Gamophyllites belongs to Equisetales'
- 'Gangamopteriopsis belongs to Plantae'
- 'Gangamopteriopsis netchaevi belongs to Gangamopteriopsis' according to Zalessky 1927
- 'Gangamopteris belongs to Neuropteridae'
- 'Ganitrocera belongs to Cornaceae'
- 'Ganitrocera holzapfeli belongs to Ganitrocera' according to Kirchheimer 1934
- 'Gardodinium belongs to Dinophyceae'
- 'Gardodinium eisenacki belongs to Gardodinium' according to Alberti 1961
- 'Garwoodella belongs to Plantae'
- 'Garwoodia gregaria belongs to Garwoodia' according to Nicholson 1941
- 'Gasteromycetes belongs to Fungi'
- 'Gastridiopsis belongs to Plantae'
- 'Gastridiopsis elisae belongs to Gastridiopsis' according to Massalongo 1851
- 'Gastromyces belongs to Gasteromycetes'
- 'Gastromyces farinosa belongs to Gastromyces' according to Ludwig 1861
- 'Gaudrya belongs to Plantae'
- 'Gaudrya trivalvis belongs to Gaudrya' according to Grand'Eury 1890
- 'Gaussia belongs to Lycopodiales'
- 'Gaussia rotunda belongs to Gaussia' according to Chachlov 1934
- 'Gaussia scutellata belongs to Gaussia' according to Neuberg 1934
- 'Geasterites belongs to Bacteria'
- 'Geasterites florissantensis belongs to Geasterites' according to Cockerell 1927
- 'Geietes belongs to Plantae'
- 'Geietes moussoni belongs to Geietes' according to Heer 1872
- 'Geinitzia cretacea belongs to Geinitzia' according to Endlicher 1847
- 'Geinitzia jenneyi belongs to Geinitzia' according to Fontaine 1899
- 'Geinitziella belongs to Plantae'
- 'Geiselodinium belongs to Dinophyceae'
- 'Geiselodinium geiseltalense belongs to Geiselodinium' according to Krutzsch 1962
- 'Geleenites belongs to Plantae'
- 'Geleenites fascinus belongs to Geleenites' according to Dijkstra 1949
- 'Gelidinium belongs to Plantae'
- 'Gelidinium trajectomosanum belongs to Gelidinium' according to Debey and Ettingshausen 1859
- 'Gellera belongs to Pteridophyta'
- 'Gellera paradoxa belongs to Gellera' according to Hollick 1931
- 'Geminitheca belongs to Pteridospermophyta'
- 'Geminitheca scotia belongs to Geminitheca' according to Smith 1959
- 'Genoites belongs to Plantae'
- 'Genoites patagonica belongs to Genoites' according to Feruglio 1942
- 'Genomosperma belongs to Pteridospermophyta'
- 'Geocarpus belongs to Plantae'
- 'Geocarpus miocaenicus belongs to Geocarpus' according to Kinkelin 1884
- 'Geonomites belongs to Plantae'
- 'Geonomites belongs to Plantae'
- 'Geonomites saturnia belongs to Geonomites' according to Visiani 1864
- 'Germanophyton belongs to Coniferales'
- 'Germaria belongs to Coniferophyta'
- 'Germaria elymiformis belongs to Germaria' according to Presl 1838
- 'Getonites belongs to Combretaceae'
- 'Getonites wilkinsoni belongs to Getonites' according to Ettingshausen 1886
- 'Gigantopteridaceae belongs to Gigantopteridales'
- 'Gigantopteris antiqua belongs to Gigantopteris' according to Kawasaki 1932
- 'Gigantopteris antiqua is recombined as Cardioglossum antiquum' according to Koidzumi 1934
- 'Gigantopteris bosschana belongs to Gigantopteris' according to Koidzumi 1936
- 'Gigantopteris bosschana is recombined as Gothanopteris bosschana' according to Koidzumi 1936
- 'Gigantopteris lagrelii belongs to Gigantopteris' according to Halle 1927
- 'Gigantopteris lagrelii is recombined as Gigantonoclea lagrelii' according to Koidzumi 1936
- 'Gigantopteris longifolius belongs to Gigantopteris' according to Kodaira 1930
- 'Gigantopteris longifolius is recombined as Bicoemplectopteridium longifolium' according to Asama 1959
- 'Gigantopteris mengkarangensis is recombined as Palaeogoniopteris mengkarangensis' according to Koidzumi 1936
- 'Gigantopteris mengkarangensis belongs to Gigantopteris' according to Gothan and Jongmans 1935
- 'Gigantopteris nicotinaefolia belongs to Gigantopteris' according to Zeiller 1907
- 'Gigantopteris whitei belongs to Gigantopteris' according to Halle 1927
- 'Gigantopteris whitei is recombined as Cathaysiopteris whitei' according to Koidzumi 1934
- 'Gigantospermum belongs to Plantae'
- 'Gigantospermum posthumi belongs to Gigantospermum' according to Jongmans and Gothan 1935
- 'Gigartinites belongs to Problematica'
- 'Gilbertina belongs to Problematica'
- 'Gilbertina spiralis belongs to Gilbertina' according to Ulrich 1904
- 'Gilboaphyton belongs to Psilophytales'
- 'Gilboaphyton goldringiae belongs to Gilboaphyton' according to Arnold 1937
- 'Gillinia belongs to Dinophyceae'
- 'Gillinia hymenophora belongs to Gillinia' according to Cookson and Eisenack 1960
- 'Gimmia belongs to Pteridospermophyta'
- 'Gimmia unilatera belongs to Gimmia' according to Remy 1953
- 'Ginginodinium belongs to Dinophyceae'
- 'Ginginodinium spinulosum belongs to Ginginodinium' according to Cookson and Eisenack 1960
- 'Ginkganthus belongs to Ginkgophyta'
- 'Ginkgo integerrima belongs to Ginkgo' according to Schmalhausen 1879
- 'Ginkgo integerrima is recombined as Nephropsis integerrima' according to Zalessky 1912
- 'Ginkgocladus belongs to Plantae'
- 'Ginkgocladus novaezeelandiae belongs to Ginkgocladus' according to Ettingshausen 1887
- 'Ginkgodium belongs to Plantae'
- 'Ginkgodium nathorsti belongs to Ginkgodium' according to Yokoyama 1889
- 'Ginkgoites belongs to Ginkgoaceae'
- 'Ginkgoites obovata belongs to Ginkgoites' according to Nathorst 1919
- 'Ginkgophyllum belongs to Ginkgophyta'
- 'Ginkgophyllum grasseti belongs to Ginkgophyllum' according to Saporta 1875
- 'Ginkgophyton belongs to Ginkgophyta'
- 'Ginkgophyton belongs to Ginkgophyta'
- 'Ginkgophyton leavitti belongs to Ginkgophyton' according to Matthew 1910
- 'Ginkgopsis belongs to Ginkgophyta'
- 'Ginkgopsis ezekanowskii belongs to Ginkgopsis' according to Schmalhausen 1918
- 'Ginkgospermum is a nomen nudum'
- 'Ginkgoxylon belongs to Ginkgoales'
- 'Ginkgoxylon asiaemediae belongs to Ginkgoxylon' according to Khudaiberdyev 1962
- 'Girtya belongs to Pteridospermophyta'
- 'Girtya pennsylvanica belongs to Girtya' according to Read 1955
- 'Givesia belongs to Plantae'
- 'Givesia namuriana belongs to Givesia' according to Stockmans and Williere 1953
- 'Gleditschiacanthus belongs to Plantae'
- 'Gleditschiacanthus alsaticus belongs to Gleditschiacanthus' according to Lakowitz 1895
- 'Gleditschites belongs to Leguminosae'
- 'Gleditschites dubium belongs to Gleditschites' according to Watelet 1924
- 'Gleditsiophyllum belongs to Rosales'
- 'Gleditsiophyllum eocenicum belongs to Gleditsiophyllum' according to Berry 1916
- 'Gleditsiophyllum triacanthoides belongs to Gleditsiophyllum' according to Berry 1910
- 'Gleicheniopsis belongs to Gleicheniaceae'
- 'Gleicheniopsis fecunda belongs to Gleicheniopsis' according to Heer 1932
- 'Gleichenites porsildi belongs to Gleichenites' according to Seward 1926
- 'Gleichenophycos belongs to Plantae'
- 'Gleichenophycos granulosus belongs to Gleichenophycos' according to Massalongo 1884
- 'Glenopteris belongs to Pteridophyta'
- 'Glenopteris splendens belongs to Glenopteris' according to Sellards 1900
- 'Globocarpon belongs to Angiospermae'
- 'Globocarpon otrubense belongs to Globocarpon' according to Velenovsky and Viniklar 1931
- 'Globosasclerotes belongs to Fungi'
- 'Globosasclerotes aegiranus belongs to Globosasclerotes' according to Stach and Pickhardt 1957
- 'Globulinea belongs to Plantae'
- 'Globulinea giganteus belongs to Globulinea' according to Ulke 1938
- 'Globuloella belongs to Problematica'
- 'Globuloella botomensis belongs to Globuloella' according to Korde 1958
- 'Glochidioxylon belongs to Euphorbiaceae'
- 'Glochidioxylon tertiarum belongs to Glochidioxylon' according to Ramanujam 1956
- 'Glockeria belongs to Pteridophyta'
- 'Glockeria marattioides belongs to Glockeria' according to Goeppert 1836
- 'Gloeocapsamorpha belongs to Plantae'
- 'Gloeocapsamorpha prisca belongs to Gloeocapsamorpha' according to Zalessky 1916
- 'Gloioconis belongs to Plantae'
- 'Gloioconis borneti belongs to Gloioconis' according to Renault 1896
- 'Glomeophycus belongs to Cyanobacteria'
- 'Glomeophycus filipendulus belongs to Glomeophycus' according to Vologdin 1966
- 'Gloriosites belongs to Liliaceae'
- 'Gloriosites rostratus belongs to Gloriosites' according to Heer 1855
- 'Glossifungites saxicava belongs to Glossifungites' according to Lomnicki 1886
- 'Glossocarpellites belongs to Angiospermae'
- 'Glossochlamys belongs to Pteridophyta'
- 'Glossophium is a nomen nudum'
- 'Glossophycus belongs to Plantae'
- 'Glossophycus camillae belongs to Glossophycus' according to Saporta and Marion 1881
- 'Glossophyllum belongs to Ginkgophyta'
- 'Glossophyllum florini belongs to Glossophyllum' according to Kraeusel 1943
- 'Glossopteridium belongs to Plantae'
- 'Glossopteridium czarnockii belongs to Glossopteridium' according to Bochenski 1957
- 'Glossopteris browniana belongs to Glossopteris' according to Brongniart 1828
- 'Glossopteris danaeoides belongs to Glossopteris' according to Royle 1833
- 'Glossopteris danaeoides is recombined as Rhabdotaenia danaeoides' according to Pant 1958
- 'Glossopteris phillipsii belongs to Glossopteris' according to Brongniart 1830
- 'Glossopteris phillipsii is recombined as Phyllopteris phillipsii' according to Brongniart 1849
- 'Glossopteropsis belongs to Ginkgophyta'
- 'Glossopteropsis angarica belongs to Glossopteropsis' according to Zalessky 1918
- 'Glossozamites belongs to Cycadophyta'
- 'Glossozamites oblongifolius belongs to Glossozamites' according to Kurr 1870
- 'Glottophyllum belongs to Ginkgophyta'
- 'Glottophyllum cuneatum belongs to Glottophyllum' according to Zalessky 1912
- 'Glumophyllum belongs to Gramineae'
- 'Glumophyllum simplex belongs to Glumophyllum' according to Weyland 1957
- 'Glutoxylon belongs to Anacardiaceae'
- 'Glutoxylon assamicum belongs to Glutoxylon' according to Chowdhury 1936
- 'Glyphanodinium belongs to Dinoflagellata'
- 'Glyphanodinium facetum belongs to Glyphanodinium' according to Drugg 1964
- 'Glyphostromium belongs to Plantae'
- 'Glyptodendron belongs to Lycopodophyta'
- 'Glyptodendron eatonense belongs to Glyptodendron' according to Claypole 1878
- 'Glyptolepidium belongs to Coniferophyta'
- 'Glyptolepidium gormense belongs to Glyptolepidium' according to Sordelli 1896
- 'Glyptolepis belongs to Coniferophyta'
- 'Glyptolepis keuperiana belongs to Glyptolepis' according to Schimper 1870
- 'Glyptophyton belongs to Plantae'
- 'Glyptophyton granulare belongs to Glyptophyton' according to Kryshtofovich 1955
- 'Glyptostrobites belongs to Plantae'
- 'Glyptostrobites acutifolius belongs to Glyptostrobites' according to Brongniart 1849
- 'Glyptostrobites parisienesis belongs to Glyptostrobites' according to Brongniart 1952
- 'Glyptostroboxylon belongs to Coniferophyta'
- 'Glyptostroboxylon goepperti belongs to Glyptostroboxylon' according to Conwentz 1885
- 'Glyptostroboxylon goepperti is recombined as Circoporoxylon goepperti' according to Kraeusel 1949
- 'Glyptostroboxylon tenerum belongs to Glyptostroboxylon' according to Prill and Kraeusel 1919
- 'Gnetopsis belongs to Pteridospermophyta'
- 'Gnetopsis elliptica belongs to Gnetopsis' according to Renault and Zeiller 1884
- 'Goeppertella belongs to Pteridophyta'
- 'Goeppertia belongs to Pteridophyta'
- 'Goeppertia polypodioides belongs to Goeppertia' according to Presl 1838
- 'Goldenbergia belongs to Pteridospermophyta'
- 'Goldenbergia glomerata belongs to Goldenbergia' according to Halle 1933
- 'Goldsonia belongs to Plantae'
- 'Goldsonia burntensis belongs to Goldsonia' according to Shrock and Twenhofel 1939
- 'Gomphostrobus belongs to Pinales'
- 'Gomphostrobus heterophylla belongs to Gomphostrobus' according to Marion 1890
- 'Gonatobotrytites belongs to Mucedinaceae'
- 'Gonatobotrytites primigenius belongs to Gonatobotrytites' according to Caspary 1927
- 'Gonatosorus belongs to Plantae'
- 'Gonatosorus nathorstii belongs to Gonatosorus' according to Raciborskii 1894
- 'Gondwanidium belongs to Plantae'
- 'Gondwanotheca siberica belongs to Gondwanotheca' according to Neuberg 1948
- 'Gondwanoxylon belongs to Celastraceae'
- 'Gondwanoxylon ghiarii belongs to Gondwanoxylon' according to Saksena 1963
- 'Gongrostromium belongs to Plantae'
- 'Goniolina cylindrica is recombined as Stichoporella cylindrica' according to Pia 1927
- 'Goniolina geometrica belongs to Goniolina' according to Buvignier 1852
- 'Goniolina hexagona belongs to Goniolina' according to d'Orbigny 1850
- 'Goniolinites belongs to Plantae'
- 'Goniolinites hemisphaerica belongs to Goniolinites' according to Maslov 1964
- 'Goniophycus belongs to Plantae'
- 'Goniophycus implexus belongs to Goniophycus' according to Saporta 1884
- 'Gonyaulacysta belongs to Dinophyceae'
- 'Gorgonisphaeridium belongs to Acritarcha'
- 'Gorgonisphaeridium winslowii belongs to Gorgonisphaeridium' according to Staplin et al. 1965
- 'Gosslingia belongs to Psilophytales'
- 'Gosslingia breconensis belongs to Gosslingia' according to Heard 1927
- 'Gothania belongs to Cordaitales'
- 'Gothania westfalica belongs to Gothania' according to Hirmer 1933
- 'Gothaniella belongs to Plantae'
- 'Gothaniella sphenophylloides belongs to Gothaniella' according to Fucini 1936
- 'Gothanopteris belongs to Gigantopteridaceae'
- 'Gouldina belongs to Cyanobacteria'
- 'Gouldina carbonaria belongs to Gouldina' according to Johnson 1940
- 'Goupioxylon belongs to Celastraceae'
- 'Gracilerectus belongs to Plantae'
- 'Gracilerectus delicatus belongs to Gracilerectus' according to Fenton and Fenton 1924
- 'Gracilerectus hackberryensis belongs to Gracilerectus' according to Webster 1920
- 'Grambastichara belongs to Charophyta'
- 'Graminites belongs to Plantae'
- 'Graminites feistmanteli belongs to Graminites' according to Geinitz 1865
- 'Graminophyllum belongs to Gramineae'
- 'Graminophyllum succineum belongs to Graminophyllum' according to Conwentz 1886
- 'Grammaephloios belongs to Lycopodiales'
- 'Grammaephloios icthya belongs to Grammaephloios' according to Harris 1935
- 'Grammatopteris belongs to Coenopteridales'
- 'Grammatopteris rigolloti belongs to Grammatopteris' according to Renault 1891
- 'Grammites belongs to Plantae'
- 'Grammitites is a nomen nudum'
- 'Grammophyllum is a nomen nudum'
- 'Grandeurya belongs to Marattiales'
- 'Grandeurya belongs to Pteridophyta'
- 'Grandeurya autunensis belongs to Grandeurya' according to Stur 1883
- 'Grandeurya coralloides belongs to Grandeurya' according to Gutbier 1883
- 'Grandeurya renaulti is recombined as Grandeuryella renaulti' according to Weiss 1885
- 'Grandeurya renaulti belongs to Grandeurya' according to Stur 1883
- 'Grandeuryella belongs to Marattiales'
- 'Granifer belongs to Problematica'
- 'Granifer conicus belongs to Granifer' according to Vologdin 1955
- 'Granomarginata belongs to Acritarcha'
- 'Granularia linearis belongs to Granularia' according to Zigno 1858
- 'Granularia schlotheimi belongs to Granularia' according to Pomel 1849
- 'Graphiolites belongs to Basidiomycota'
- 'Grevillea constans belongs to Grevillea' according to Velenovsky 1883
- 'Grevillea constans is recombined as Grevilleophyllum constans' according to Velenovsky 1889
- 'Grevilleophyllum belongs to Plantae'
- 'Grewiopsis belongs to Malvaceae'
- 'Grewiopsis tiliacea belongs to Grewiopsis' according to Saporta 1865
- 'Grewioxylon belongs to Dipterocarpaceae'
- 'Grewioxylon belongs to Plantae'
- 'Grewioxylon intertrappea belongs to Grewioxylon' according to Shallom 1963
- 'Grewioxylon swedenborgii belongs to Grewioxylon' according to Schuster 1910
- 'Greysonia belongs to Problematica'
- 'Greysonia basaltica belongs to Greysonia' according to Walcott 1914
- 'Grilletia belongs to Chytridiomycota'
- 'Grilletia spherospermii belongs to Grilletia' according to Renault and Bertrand 1885
- 'Griphoporella curvata belongs to Griphoporella' according to Guembel 1915
- 'Gristhorpia belongs to Caytoniales'
- 'Gristhorpia nathorsti belongs to Gristhorpia' according to Thomas 1925
- 'Grovesichara belongs to Charophyta'
- 'Grumileophyllum belongs to Rubiaceae'
- 'Grumileophyllum attenuatum belongs to Grumileophyllum' according to Geyler 1887
- 'Guajacites belongs to Plantae'
- 'Guajacites heerii belongs to Guajacites' according to Massalongo 1858
- 'Guembelina belongs to Plantae'
- 'Guembelina bellovacina belongs to Guembelina' according to Munier-Chalmas 1877
- 'Guilielmites belongs to Plantae'
- 'Guilielmites permianus belongs to Guilielmites' according to Geinitz 1858
- 'Guilliera belongs to Cycadophyta'
- 'Guilliera sarthacensis belongs to Guilliera' according to Crie 1885
- 'Gulpenia belongs to Sphenopteridae'
- 'Gulpenia limburgensis belongs to Gulpenia' according to Gothan and Jongmans 1927
- 'Gunflintia belongs to Problematica'
- 'Gusichia belongs to Plantae'
- 'Gusichia furcata belongs to Gusichia' according to Chirkova-Zalesskaia 1957
- 'Gutbieria belongs to Pteridophyta'
- 'Gutbieria angustoloba belongs to Gutbieria' according to Presl 1838
- 'Guttiferoxylon belongs to Guttiferae'
- 'Guycampbellia belongs to Lycophyta'
- 'Gymnocaulus belongs to Pteridophyta'
- 'Gymnocodium belongs to Codiaceae'
- 'Gymnocodium fragile is recombined as Permocalculus fragilis' according to Elliott 1955
- 'Gymnodinium galeritum belongs to Gymnodinium' according to Deflandre 1938
- 'Gymnodinium galeritum is recombined as Endoscrinium galeritum' according to Klement 1960
- 'Gymnoneuropteris belongs to Coenopteridales'
- 'Gymnoneuropteris carinthiaca belongs to Gymnoneuropteris' according to Pia 1924
- 'Gymnosolen belongs to Problematica'
- 'Gymnosolen ramsayi belongs to Gymnosolen' according to Steinmann 1911
- 'Gymnostrobus belongs to Lycopsida'
- 'Gymnostrobus salisburyi belongs to Gymnostrobus' according to Bureau 1914
- 'Gynotrochoxylon belongs to Rhizophoraceae'
- 'Gynotrochoxylon africanum is recombined as Tamaricoxylon africanum' according to Boureau 1951
- 'Gynotrochoxylon africanum belongs to Gynotrochoxylon' according to Kraeusel 1939
- 'Gyrocalamus belongs to Plantae'
- 'Gyrocalamus palatinus belongs to Gyrocalamus' according to Weiss 1884
- 'Gyrochorda is an objective synonym of Gyrochorte'
- 'Gyrochorte is replaced by Gyrochorda' according to Schimper 1879
- 'Gyrochorte vermicularis belongs to Gyrochorte' according to Heer 1865
- 'Gyrodendron belongs to Problematica'
- 'Gyrodendron emersoni belongs to Gyrodendron' according to Ulrich 1904
- 'Gyrogona belongs to Plantae'
- 'Gyrogona medicaginula belongs to Gyrogona' according to Lamarck 1822
- 'Gyrogonites belongs to Charophyta'
- 'Gyrogonites medicaginula belongs to Gyrogonites' according to Lamarck 1804
- 'Gyrogonites medicaginula is recombined as Brachychara medicaginula' according to Grambast and Grambast 1954
- 'Gyrogonites moreyi belongs to Gyrogonites' according to Peck 1934
- 'Gyrogonites moreyi is recombined as Stomochara moreyi' according to Grambast 1961
- 'Gyrophyllites belongs to Equisetales'
- 'Gyrophyllites kwassizensis belongs to Gyrophyllites' according to Glocker 1841
- 'Gyroporella belongs to Dasycladaceae'
- 'Gyroporella parvovesiculifera is recombined as Thaumatoporella parvovesiculifera' according to Pia 1927
- 'Gyroporella parvovesiculifera belongs to Gyroporella' according to Raineri 1922
- 'Gyroporella pauciforata is recombined as Physoporella pauciforata' according to Steinmann 1903
- 'Gyropteris belongs to Pteridophyta'
- 'Gyropteris crassa belongs to Gyropteris' according to Corda 1845
- 'Gyropteris sinuosa belongs to Gyropteris' according to Goeppert 1852
- 'Gyropteris sinuosa is recombined as Silesiopteris sinuosa' according to Posthumus 1924
- 'Haastia belongs to Musaceae'
- 'Haastia speciosa belongs to Haastia' according to Ettingshausen 1887
- 'Hadrophycus belongs to Problematica'
- 'Hadrophycus immanis belongs to Hadrophycus' according to Fenton and Fenton 1939
- 'Hagenmulleria is a nomen nudum'
- 'Hagiophyton belongs to Cyatheales'
- 'Haiburnia belongs to Coniferales'
- 'Haitingeria belongs to Cycadales'
- 'Hakeites belongs to Proteaceae'
- 'Hakeites deletus belongs to Hakeites' according to Saporta 1861
- 'Hakeites major belongs to Hakeites' according to Saporta 1867
- 'Halimedides saportae belongs to Halimedides' according to Lorenz von Liburnau 1902
- 'Halimedopsis belongs to Plantae'
- 'Haliserides belongs to Problematica'
- 'Haliserides dechenianus belongs to Haliserides' according to Goeppert 1869
- 'Haliserites belongs to Plantae'
- 'Haliserites dechenianus belongs to Haliserites' according to Goeppert 1893
- 'Haliserites dechenianus is replaced by Taeniocrada lesquereuxi' according to White 1902
- 'Haliserites reichii belongs to Haliserites' according to Sternberg 1833
- 'Halleia belongs to Plantae'
- 'Halleia penicillata belongs to Halleia' according to Fucini 1936
- 'Halocharis belongs to Monocotyledonae'
- 'Halocharis longifolia belongs to Halocharis' according to Miquel 1853
- 'Halochloris belongs to Plantae'
- 'Halochloris cymodoceoides belongs to Halochloris' according to Unger 1843
- 'Halonia belongs to Lycopodophyta'
- 'Halonia gracilis belongs to Halonia' according to Lindley and Hutton 1833
- 'Halophoridia belongs to Acritarcha'
- 'Halophoridia xena belongs to Halophoridia' according to Cookson and Eisenack 1962
- 'Halophytis belongs to Laminariales'
- 'Halophytis magnum belongs to Halophytis' according to Sang 1885
- 'Halopoa imbricata belongs to Halopoa' according to Torell 1869
- 'Halopteris belongs to Pteridophyta'
- 'Halopteris typica belongs to Halopteris' according to Stur 1883
- 'Haloragicarya belongs to Haloragaceae'
- 'Haloragicarya quadrilocularis belongs to Haloragicarya' according to Reid and Chandler 1933
- 'Halymenites belongs to Problematica'
- 'Halymenites schitzleinii belongs to Halymenites' according to Sternberg 1833
- 'Halysis moniliformis belongs to Halysis' according to Hoeg 1933
- 'Hamamelidanthium belongs to Hamamelidaceae'
- 'Hamamelidanthium succineum belongs to Hamamelidanthium' according to Conwentz 1886
- 'Hamamelidoxylon belongs to Angiospermae'
- 'Hamamelidoxylon renaulti belongs to Hamamelidoxylon' according to Lignier 1907
- 'Hamamelites belongs to Hamamelidaceae'
- 'Hamamelites fothergilloides belongs to Hamamelites' according to Saporta 1865
- 'Hantsia belongs to Caryophyllales'
- 'Hapalophloea belongs to Nemaliales'
- 'Hapalophloea scissa belongs to Hapalophloea' according to Pia 1937
- 'Hapalopteris belongs to Plantae'
- 'Hapalopteris typica belongs to Hapalopteris' according to Stur 1883
- 'Hapaloxylon is a subjective synonym of Apaloxylon'
- 'Haplocalamus belongs to Calamitaceae'
- 'Haplocalamus thuringiacus belongs to Haplocalamus' according to Renault 1896
- 'Haplographites belongs to Fungi'
- 'Haplographites cateniger belongs to Haplographites' according to Felix 1894
- 'Haplomyeloxylon belongs to Plantae'
- 'Haplomyeloxylon triassicum belongs to Haplomyeloxylon' according to Vogellehner 1965
- 'Haplophragmium belongs to Plantae'
- 'Haploplectites belongs to Plantae'
- 'Haploporella belongs to Plantae'
- 'Haploporella eruca belongs to Haploporella' according to Parker and Jones 1871
- 'Haplostigma belongs to Lycopodophyta'
- 'Haplostigma irregulare belongs to Haplostigma' according to Schwarz 1931
- 'Haplostigma lenticulare belongs to Haplostigma' according to Barbosa 1949
- 'Haplostigma lenticulare is recombined as Spongiophyton lenticulare' according to Kraeusel 1954
- 'Haplotheca belongs to Plantae'
- 'Haplotheca simplex belongs to Haplotheca' according to Gothan and Hartung 1949
- 'Harlania belongs to Plantae'
- 'Harlania hallii belongs to Harlania' according to Goeppert 1851
- 'Harringtonia belongs to Cycadophyta'
- 'Harringtonia argentinica belongs to Harringtonia' according to Arber 1942
- 'Harrisia is replaced by Harrisiothecium' according to Lundblad 1961
- 'Harrisichara belongs to Charophyta'
- 'Hartzia belongs to Ginkgophyta'
- 'Hartzia belongs to Cornaceae'
- 'Hartzia rosenkjari belongs to Hartzia' according to Hartz 1965
- 'Hartzia tenuis belongs to Hartzia' according to Harris 1935
- 'Hartziella belongs to Onagraceae'
- 'Hartziella rosenkjaeri belongs to Hartziella' according to Hartz 1963
- 'Haspia belongs to Plantae'
- 'Haspia devonica belongs to Haspia' according to Kraeusel and Weyland 1929
- 'Hastimima whitei belongs to Hastimima' according to White 1908
- 'Hastomia belongs to Plantae'
- 'Hastomia parallela belongs to Hastomia' according to Meyen 1965
- 'Hauera belongs to Plantae'
- 'Hauera americana belongs to Hauera' according to Unger 1845
- 'Hauera bornensis belongs to Hauera' according to Engelhardt 1870
- 'Hausmannia dichotoma belongs to Hausmannia' according to Dunker 1846
- 'Hausmannia rigida belongs to Hausmannia' according to Newberry 1895
- 'Hausmannia rigida is recombined as Newberryana rigida' according to Berry 1910
- 'Hawlea belongs to Pteridophyta'
- 'Hawlea pulcherrima belongs to Hawlea' according to Corda 1845
- 'Haydenia belongs to Cyatheaceae'
- 'Haydenia thyrsopteroides belongs to Haydenia' according to Seward 1912
- 'Hedeia belongs to Psilophytophyta'
- 'Hedeia corymbosa belongs to Hedeia' according to Cookson 1935
- 'Hedera primordialis belongs to Hedera' according to Saporta 1879
- 'Hedera primordialis is recombined as Hederophyllum primordiale' according to Velenovsky 1889
- 'Hederaephyllum belongs to Apiales'
- 'Hederaephyllum crenulatum belongs to Hederaephyllum' according to Fontaine 1889
- 'Hederophyllum belongs to Apiales'
- 'Hedstroemia halimedoides belongs to Hedstroemia' according to Rothpletz 1913
- 'Hedycaryoxylon belongs to Monimiaceae'
- 'Hedycaryoxylon subaffine belongs to Hedycaryoxylon' according to Vater 1960
- 'Hedychiophyllum belongs to Plantae'
- 'Hedychiophyllum speciosum belongs to Hedychiophyllum' according to Squinabol 1921
- 'Heeria is a nomen nudum'
- 'Heilungia belongs to Cycadales'
- 'Heilungia amureansis belongs to Heilungia' according to Novopokrovsky 1956
- 'Helenia is replaced by Heleniodendron' according to Sze 1936
- 'Helenia inopinata is recombined as Heleniodendron inopinata' according to Sze 1936
- 'Helenia inopinata belongs to Helenia' according to Zalessky 1930
- 'Heleniella belongs to Plantae'
- 'Heleniella bellula belongs to Heleniella' according to Zalessky 1930
- 'Heleniodendron belongs to Plantae'
- 'Helicites is a nomen nudum'
- 'Helictoxylon belongs to Plantae'
- 'Helictoxylon speciosum belongs to Helictoxylon' according to Felix 1882
- 'Heliodinium belongs to Dinophyceae'
- 'Heliodinium voigti belongs to Heliodinium' according to Alberti 1961
- 'Heliophycus belongs to Problematica'
- 'Heliophycus stelliforme belongs to Heliophycus' according to Miller and Dyer 1878
- 'Heliotropites belongs to Asparagales'
- 'Heliotropites reussi belongs to Heliotropites' according to Ettingshausen 1868
- 'Helleborites belongs to Ranunculaceae'
- 'Helleborites marginatus belongs to Helleborites' according to Heer 1870
- 'Hellia belongs to Plantae'
- 'Hellia pulchella belongs to Hellia' according to Unger 1839
- 'Helminthoida irregularis belongs to Helminthoida' according to Schafhaeutl 1851
- 'Helminthopsis magna belongs to Helminthopsis' according to Heer 1877
- 'Helobiae belongs to Monocotyledonae'
- 'Helobiaephyllum belongs to Rhamnaceae'
- 'Helophyton belongs to Plantae'
- 'Helophyton williamsonis belongs to Helophyton' according to Cash and Hick 1881
- 'Helviensia belongs to Plantae'
- 'Helviensia delgadoi belongs to Helviensia' according to Lima 1896
- 'Hemintholithus is a nomen nudum'
- 'Hemionitites belongs to Pteridophyta'
- 'Hemionitites scolopendrioides belongs to Hemionitites' according to Saporta 1865
- 'Hemiphoenicites belongs to Palmae'
- 'Hemitelites belongs to Filicinae'
- 'Hemitrapa belongs to Trapaceae'
- 'Hemitrapa trapelloidea belongs to Hemitrapa' according to Miki 1941
- 'Heninia belongs to Plantae'
- 'Heninia belgica belongs to Heninia' according to Stockmans and Williere 1962
- 'Hepaticaephyton belongs to Plantae'
- 'Hepaticaephyton polonicum belongs to Hepaticaephyton' according to Greguss 1959
- 'Hepaticites belongs to Marchantiophyta'
- 'Hepaticites glebosus belongs to Hepaticites' according to Harris 1931
- 'Hepaticites glebosus is recombined as Metzgeriites glebosus' according to Steere 1946
- 'Hepaticites kidstoni belongs to Hepaticites' according to Walton 1925
- 'Hepatophyta belongs to Plantae'
- 'Heracleites belongs to Plantae'
- 'Heracleites mobiusi belongs to Heracleites' according to Kinkelin 1908
- 'Hermanophyton belongs to Peltaspermophyta'
- 'Hermanophyton kirkbyorum belongs to Hermanophyton' according to Arnold 1962
- 'Hermesinella transversa belongs to Hermesinella' according to Deflandre 1934
- 'Hermesinopsis caulleryi belongs to Hermesinopsis' according to Deflandre 1934
- 'Hermitella is a nomen nudum'
- 'Herouvalina belongs to Plantae'
- 'Herouvalina herouvalensis belongs to Herouvalina' according to Munier-Chalmas 1899
- 'Hesperidophyllum belongs to Angiospermae'
- 'Hesperidophyllum senogallensis belongs to Hesperidophyllum' according to Massalongo 1858
- 'Heterangium belongs to Pteridospermophyta'
- 'Heterangium paradoxum belongs to Heterangium' according to Corda 1845
- 'Heterocalyx belongs to Anacardiaceae'
- 'Heterocalyx ungeri belongs to Heterocalyx' according to Saporta 1873
- 'Heterocladiscos belongs to Cupressaceae'
- 'Heterocladiscos thujoides belongs to Heterocladiscos' according to Ettingshausen 1866
- 'Heterofilicites belongs to Pteridophyta'
- 'Heterofilicites anceps belongs to Heterofilicites' according to Berry 1905
- 'Heterolepis belongs to Cycadophyta'
- 'Heteropteris belongs to Sphenopteridae'
- 'Heterosporites is a nomen nudum'
- 'Heterosporites belongs to Plantae'
- 'Heterotheca belongs to Pteridospermophyta'
- 'Heterotheca grievii belongs to Heterotheca' according to Benson 1922
- 'Heteroxylon belongs to Plantae'
- 'Heteroxylon seyferti belongs to Heteroxylon' according to Hartig 1848
- 'Heveoxylon belongs to Euphorbiaceae'
- 'Heveoxylon microporosum belongs to Heveoxylon' according to Kruse 1954
- 'Hexagonaria belongs to Problematica'
- 'Hexagonaria senonica belongs to Hexagonaria' according to Deecke 1901
- 'Hexagonocarpus belongs to Plantae'
- 'Hexagonocarpus crassus belongs to Hexagonocarpus' according to Renault 1890
- 'Hexapterocarpus belongs to Plantae'
- 'Hexapterospermum belongs to Plantae'
- 'Hexapterospermum stenopterum belongs to Hexapterospermum' according to Brongniart 1874
- 'Hibiscoxylon belongs to Malvaceae'
- 'Hibiscoxylon niloticum belongs to Hibiscoxylon' according to Kraeusel 1939
- 'Hicklingia belongs to Psilophytophyta'
- 'Hicklingia edwardi belongs to Hicklingia' according to Kidston and Lang 1923
- 'Hicoroides belongs to Angiospermae'
- 'Hicoroides angulata belongs to Hicoroides' according to Perkins 1904
- 'Hieracites belongs to Asteraceae'
- 'Hieracites salyorum belongs to Hieracites' according to Saporta 1861
- 'Hierogramma is a subjective synonym of Cladoxylon'
- 'Hierogramma mysticum belongs to Hierogramma' according to Unger 1856
- 'Hightea belongs to Malvaceae'
- 'Hightea elliptica belongs to Hightea' according to Bowerbank 1840
- 'Hikorocodium belongs to Codiaceae'
- 'Hikorocodium elegantae belongs to Hikorocodium' according to Endo 1951
- 'Hildesheimia belongs to Ginkgophyta'
- 'Hildesheimia salfeldi belongs to Hildesheimia' according to Lipps 1936
- 'Hiltonia belongs to Coniferophyta'
- 'Hiltonia rivuli belongs to Hiltonia' according to Stoneley 1956
- 'Himanthaliopsis belongs to Plantae'
- 'Himanthaliopsis sniatkovi belongs to Himanthaliopsis' according to Zalessky 1915
- 'Himanthalites belongs to Problematica'
- 'Himanthalites taeniatus belongs to Himanthalites' according to Kurr 1858
- 'Himantites belongs to Plantae'
- 'Himantites alopecurus belongs to Himantites' according to Debey and Ettingshausen 1892
- 'Himantophyton belongs to Psilophytophyta'
- 'Himantophyton castorense belongs to Himantophyton' according to Matthew 1913
- 'Hippocrateites belongs to Plantae'
- 'Hippocrateoxylon belongs to Plantae'
- 'Hippocrateoxylon javanicum belongs to Hippocrateoxylon' according to Hofmann 1884
- 'Hippodophycus belongs to Plantae'
- 'Hippodophycus cowlesi belongs to Hippodophycus' according to Hall and Whitfield 1872
- 'Hippuridella belongs to Hippuridaceae'
- 'Hippuridella stacheana belongs to Hippuridella' according to Edwards 1932
- 'Hippurites belongs to Calamitales'
- 'Hippurites gigantea belongs to Hippurites' according to Lindley and Hutton 1834
- 'Hiraeocarpum belongs to Plantae'
- 'Hiraeocarpum parvulum belongs to Hiraeocarpum' according to Lakowitz 1895
- 'Hirmeria belongs to Plantae'
- 'Hirmeria notabilis belongs to Hirmeria' according to Fucini 1936
- 'Hirmeriella belongs to Coniferales'
- 'Hirmeriella rhatoliassica belongs to Hirmeriella' according to Hörhammer 1933
- 'Hirsutocarpum belongs to Plantae'
- 'Hirsutocarpum extensum belongs to Hirsutocarpum' according to Maslov 1957
- 'Hirsutum belongs to Glossopteridaceae'
- 'Hisingera belongs to Cycadophyta'
- 'Hisingera mantellii belongs to Hisingera' according to Miquel 1842
- 'Hissaropteris belongs to Plantae'
- 'Hissaropteris jagnabensis belongs to Hissaropteris' according to Kuzichkna and Sixtel 1962
- 'Histiophora belongs to Dinophyceae'
- 'Histiophora ornata belongs to Histiophora' according to Klement 1960
- 'Hoegia belongs to Pteridospermophyta'
- 'Hoegia papillata belongs to Hoegia' according to Townrow 1957
- 'Hoegisphaera glabra belongs to Hoegisphaera' according to Staplin 1961
- 'Holcodendron belongs to Plantae'
- 'Holcospermum belongs to Plantae'
- 'Holcospermum dubium belongs to Holcospermum' according to Nathorst 1914
- 'Holopleura belongs to Nymphaeaceae'
- 'Holopleura victoria belongs to Holopleura' according to Caspary 1856
- 'Holosporella belongs to Dasycladaceae'
- 'Holstia belongs to Plantae'
- 'Holstia splendens belongs to Holstia' according to Hagstrom 1906
- 'Holynia belongs to Plantae'
- 'Holynia stellulata belongs to Holynia' according to Obrhel 1963
- 'Homoxylon belongs to Plantae'
- 'Homoxylon is replaced by Sahnioxylon' according to Bose and Sah 1954
- 'Homoxylon blasii belongs to Homoxylon' according to Hartig 1848
- 'Homoxylon rajmahalense belongs to Homoxylon' according to Sahni 1932
- 'Homoxylon rajmahalense is recombined as Sahnioxylon rajmahalense' according to Bose and Sah 1954
- 'Hooleya belongs to Betulaceae'
- 'Hooleya hermis belongs to Hooleya' according to Unger 1926
- 'Hopeoxylon belongs to Dipterocarpaceae'
- 'Hopeoxylon indicum belongs to Hopeoxylon' according to Navale 1963
- 'Hordwellia belongs to Theaceae'
- 'Hormosporites belongs to Cyanobacteria'
- 'Hormosporites devonicus belongs to Hormosporites' according to Gruess 1927
- 'Hornea belongs to Psilophytophyta'
- 'Hornea lignieri belongs to Hornea' according to Kidston and Lang 1920
- 'Hornea lignieri is recombined as Horneophyton lignieri' according to Barghoorn and Darrah 1938
- 'Horneophyton belongs to Psilophytophyta'
- 'Hornichara belongs to Charophyta'
- 'Hornichara kazakstanica belongs to Hornichara' according to Maslov 1963
- 'Horologinella belongs to Dinophyceae'
- 'Horologinella lineata belongs to Horologinella' according to Cookson and Eisenack 1962
- 'Hostimella is an objective synonym of Hostinella'
- 'Hostinella belongs to Psilophytophyta'
- 'Hostinella hostinensis belongs to Hostinella' according to Barrande 1882
- 'Hovassebria belongs to Plantae'
- 'Hovassebria brevispinosa belongs to Hovassebria' according to Hovasse 1933
- 'Hoveniphyllum belongs to Rhamnaceae'
- 'Hoveniphyllum thunbergi belongs to Hoveniphyllum' according to Nathorst 1888
- 'Hsiangchiphyllum belongs to Plantae'
- 'Hsiangchiphyllum trinerve belongs to Hsiangchiphyllum' according to Sze 1949
- 'Humilis belongs to Plantae'
- 'Humilis legalli belongs to Humilis' according to Roualt 1850
- 'Hungarodiscus belongs to Chlorophyceae'
- 'Hungarodiscus fragilis belongs to Hungarodiscus' according to Krivan-Hutter 1963
- 'Hungerfordia belongs to Plantae'
- 'Hungerfordia dichotoma belongs to Hungerfordia' according to Fry and Banks 1955
- 'Huroniospora belongs to Problematica'
- 'Huttonia spicata belongs to Huttonia' according to Sternberg 1837
- 'Hydatica belongs to Plantae'
- 'Hydatica prostrata belongs to Hydatica' according to Artis 1825
- 'Hydnites belongs to Hymenomycetes'
- 'Hydnites argillae belongs to Hydnites' according to Ludwig 1892
- 'Hydnocarpophyllum belongs to Flacourtiaceae'
- 'Hydnocarpophyllum krauseli belongs to Hydnocarpophyllum' according to Rasky 1960
- 'Hydrangeiphyllum belongs to Saxifragaceae'
- 'Hydrasperma belongs to Pteridospermophyta'
- 'Hydrasperma tenuis belongs to Hydrasperma' according to Long 1961
- 'Hydrocharites belongs to Hydrocharitaceae'
- 'Hydrocharites obcordatus belongs to Hydrocharites' according to Weber 1855
- 'Hydrocorynites belongs to Plantae'
- 'Hydrocorynites stylostromicus belongs to Hydrocorynites' according to Maslov 1960
- 'Hydrocotylophyllum belongs to Apiales'
- 'Hydrocotylophyllum lusitanicum belongs to Hydrocotylophyllum' according to Teixeira 1947
- 'Hydrocytium belongs to Problematica'
- 'Hydrocytium silicula belongs to Hydrocytium' according to Matthew 1889
- 'Hydrodictyolites belongs to Plantae'
- 'Hydrodictyolites carbonis belongs to Hydrodictyolites' according to Elouski 1930
- 'Hydrodictyopsis belongs to Plantae'
- 'Hydrodictyopsis prisca belongs to Hydrodictyopsis' according to Massalongo 1858
- 'Hydropterangium belongs to Polypodiophyta'
- 'Hydropterangium marsilioides belongs to Hydropterangium' according to Halle 1910
- 'Hydropteridangium marsilioides belongs to Hydropteridangium' according to Harris 1932
- 'Hydropteridangium marsilioides is recombined as Harrisia marsilioides' according to Lundblad 1950
- 'Hydropteridangium marsilioides is recombined as Harrisiothecium marsilioides' according to Lundblad 1961
- 'Hyenia sphenophylloides belongs to Hyenia' according to Nathorst 1915
- 'Hygrohypnidium belongs to Plantae'
- 'Hygrohypnidium ludwigi belongs to Hygrohypnidium' according to Kirchheimer 1936
- 'Hymenaeophyllum belongs to Plantae'
- 'Hymenaeophyllum primigenium belongs to Hymenaeophyllum' according to Velenovsky 1889
- 'Hymenomycetes belongs to Fungi'
- 'Hymenophyllea belongs to Pteridophyta'
- 'Hymenophyllea subalata belongs to Hymenophyllea' according to Geinitz 1855
- 'Hymenophyllites belongs to Pteridophyta'
- 'Hymenophyllites alatus belongs to Hymenophyllites' according to Geinitz 1855
- 'Hymenophyllites quercifolius belongs to Hymenophyllites' according to Goeppert 1836
- 'Hymenophyllum belongs to Filicales'
- 'Hymenophyllum weissi belongs to Hymenophyllum' according to Schimper 1869
- 'Hymenophyllum weissi is recombined as Saaria weissi' according to Remy 1953
- 'Hymenopteris belongs to Plantae'
- 'Hymenopteris psilotoides belongs to Hymenopteris' according to Stokes and Webb 1824
- 'Hymenopterites is a nomen nudum'
- 'Hymenotheca belongs to Pteridospermophyta'
- 'Hymenotheca beyschlagi belongs to Hymenotheca' according to Potonie 1890
- 'Hyoserites belongs to Compositae'
- 'Hyoserites schultzii belongs to Hyoserites' according to Ettingshausen 1868
- 'Hyphantaenia belongs to Problematica'
- 'Hyphites belongs to Plantae'
- 'Hyphomycetes belongs to Fungi'
- 'Hyphoplasmium belongs to Plantae'
- 'Hyphopteris belongs to Plantae'
- 'Hyphopteris radiata belongs to Hyphopteris' according to Schimper 1869
- 'Hypnites belongs to Bryophyta'
- 'Hypnites haeringianus belongs to Hypnites' according to Ettingshausen 1853
- 'Hypochnites belongs to Hymenomycetes'
- 'Hypoglossidium belongs to Monocotyledonae'
- 'Hypoglossidium antiquum belongs to Hypoglossidium' according to Heer 1874
- 'Hypsilocarpus belongs to Cordaitales'
- 'Hypsilocarpus amygdalaeformis belongs to Hypsilocarpus' according to Goeppert and Berger 1890
- 'Hyrcanopteris belongs to Filicales'
- 'Hyrcanopteris sevanensis belongs to Hyrcanopteris' according to Kryshtofovich and Prinada 1933
- 'Hysterites belongs to Plantae'
- 'Hysterites opegraphoides belongs to Hysterites' according to Goeppert 1846
- 'Hystrichodinium belongs to Dinophyceae'
- 'Hystrichokibotium belongs to Dinophyceae'
- 'Hystrichokibotium pseudofurcatum belongs to Hystrichokibotium' according to Klumpp 1953
- 'Hystrichokolpoma belongs to Dinophyceae'
- 'Hystrichokolpoma cinctum belongs to Hystrichokolpoma' according to Klumpp 1953
- 'Hystrichosphaera belongs to Dinophyceae'
- 'Hystrichosphaera furcata belongs to Hystrichosphaera' according to Wetzel 1933
- 'Hystrichosphaeridium belongs to Dinophyceae'
- 'Hystrichosphaeridium ramuliferum belongs to Hystrichosphaeridium' according to Deflandre 1937
- 'Hystrichosphaeridium ramuliferum is recombined as Achomosphaera ramulifera' according to Evitt 1963
- 'Hystrichosphaeropsis belongs to Dinophyceae'
- 'Hystrichosphaeropsis ovum belongs to Hystrichosphaeropsis' according to Deflandre 1935
- 'Hythia belongs to Plantae'
- 'Hythia elgari belongs to Hythia' according to Stopes 1915
- 'Icacinicarya belongs to Icacinaceae'
- 'Icacinicarya platycarpa belongs to Icacinicarya' according to Reid and Chandler 1933
- 'Icacinoxylon belongs to Icacinaceae'
- 'Icacinoxylon citronelloides belongs to Icacinoxylon' according to Schilkina 1956
- 'Ichnophycus belongs to Plantae'
- 'Ichnophycus tridactylus belongs to Ichnophycus' according to Hall 1852
- 'Idelopteris belongs to Ginkgophyta'
- 'Idelopteris elegans belongs to Idelopteris' according to Zalessky 1929
- 'Idiophyllum belongs to Plantae'
- 'Idiophyllum rotundifolium belongs to Idiophyllum' according to Lesquereux 1880
- 'Iegosigopteris belongs to Osmundaceae'
- 'Iegosigopteris yavorskii belongs to Iegosigopteris' according to Zalessky 1935
- 'Ilfeldia belongs to Pteridospermophyta'
- 'Illiciphyllum belongs to Illiciaceae'
- 'Illicites belongs to Illiciaceae'
- 'Illicites astrocarpa belongs to Illicites' according to Mueller 1877
- 'Illicium belongs to Illiciaceae'
- 'Illicium deletum belongs to Illicium' according to Velenovsky 1884
- 'Illicium deletum is recombined as Illiciphyllum deletum' according to Velenovsky 1889
- 'Illiniocarpon belongs to Lycopodophyta'
- 'Illiniocarpon cadyi belongs to Illiniocarpon' according to Schopf 1938
- 'Illipophyllum belongs to Sapotaceae'
- 'Illipophyllum thomsoni belongs to Illipophyllum' according to Kraeusel and Weyland 1959
- 'Ilsaephytum belongs to Plantae'
- 'Ilsaephytum kayseri belongs to Ilsaephytum' according to Weiss 1885
- 'Imhastomia belongs to Plantae'
- 'Imhastomia prima belongs to Imhastomia' according to Meyer 1965
- 'Imparipteris belongs to Plantae'
- 'Imstrihastomia belongs to Plantae'
- 'Imstrihastomia regularis belongs to Imstrihastomia' according to Meyen 1965
- 'Incolaria belongs to Fungi'
- 'Incolaria securiformis belongs to Incolaria' according to Herzer 1893
- 'Indocarpa belongs to Guttiferae'
- 'Indocarpa intertrappea belongs to Indocarpa' according to Jain 1964
- 'Indophyllum belongs to Coniferales'
- 'Indophyllum sahnii belongs to Indophyllum' according to Vishnu-Mittre 1958
- 'Indopolia belongs to Dasycladaceae'
- 'Indopolia satyavanti belongs to Indopolia' according to Pia 1936
- 'Indostrobus belongs to Pinaceae'
- 'Indostrobus bifidolepis belongs to Indostrobus' according to Sahni 1931
- 'Indotheca belongs to Plantae'
- 'Indotheca sakesarensis belongs to Indotheca' according to Sitholey 1943
- 'Indoxylon belongs to Gymnospermopsida'
- 'Indoxylon canalosum belongs to Indoxylon' according to Surange and Maithy 1963
- 'Inga latifolia belongs to Inga' according to Velenovsky 1884
- 'Inga latifolia is recombined as Ingophyllum latifolium' according to Velenovsky 1889
- 'Ingophyllum belongs to Leguminosae'
- 'Iniopteris belongs to Pteridophyta'
- 'Iniopteris sibirica belongs to Iniopteris' according to Zalessky 1934
- 'Inolepis belongs to Coniferophyta'
- 'Inolepis imbricata belongs to Inolepis' according to Heer 1874
- 'Intia belongs to Musci'
- 'Intia vermicularis belongs to Intia' according to Neuberg 1956
- 'Involucrum belongs to Angiospermae'
- 'Involucrum tripterum belongs to Involucrum' according to Velenovsky and Viniklar 1931
- 'Inzeria belongs to Plantae'
- 'Inzeria tjumusi belongs to Inzeria' according to Krylov 1963
- 'Ioffea belongs to Plantae'
- 'Ioffea zaisanica belongs to Ioffea' according to Ilinskaia 1961
- 'Iriartites belongs to Arecaceae'
- 'Iridinium belongs to Iridaceae'
- 'Iridinium priscum belongs to Iridinium' according to Wessel 1855
- 'Iridium belongs to Iridaceae'
- 'Iridium groenlandicum belongs to Iridium' according to Heer 1866
- 'Iridopteridineae belongs to Coenopteridales'
- 'Iridopteris belongs to Iridopteridineae'
- 'Iridopteris eriensis belongs to Iridopteris' according to Arnold 1940
- 'Irites belongs to Iridaceae'
- 'Irites alaskana belongs to Irites' according to Lesquereux 1887
- 'Irites grandifolium belongs to Irites' according to Principi 1921
- 'Irrawadioxylon belongs to Dipterocarpaceae'
- 'Isatides belongs to Cruciferae'
- 'Isatides microcarpa belongs to Isatides' according to Saporta 1889
- 'Isiolopteris belongs to Pteridophyta'
- 'Isiolopteris serrata belongs to Isiolopteris' according to Zalessky 1930
- 'Isoetites crociformis belongs to Isoetites' according to Muenster 1842
- 'Isoetopsis belongs to Isoetaceae'
- 'Isoetopsis subaphylla belongs to Isoetopsis' according to Saporta 1888
- 'Isonanadrophyllum belongs to Sapotaceae'
- 'Isselia belongs to Monocotyledonae'
- 'Isselia primaeva belongs to Isselia' according to Squinabol 1891
- 'Isthmolithus belongs to Problematica'
- 'Isthmolithus recurvus belongs to Isthmolithus' according to Deflandre 1954
- 'Itieria belongs to Problematica'
- 'Itieria brongniarti belongs to Itieria' according to Saporta 1872
- 'Itopsidema belongs to Osmundaceae'
- 'Itopsidema vancleavii belongs to Itopsidema' according to Daugherty 1960
- 'Ivanovia tenuissima belongs to Ivanovia' according to Khvorova 1946
- 'Ixorophyllum belongs to Rubiaceae'
- 'Ixorophyllum anceps belongs to Ixorophyllum' according to Geyler 1887
- 'Ixostrobus belongs to Cycadophyta'
- 'Jacutiella belongs to Cycadophyta'
- 'Jacutiella amurensis belongs to Jacutiella' according to Novopokrovsky 1956
- 'Jacutopteris belongs to Plantae'
- 'Jacutopteris leneansis belongs to Jacutopteris' according to Vasilevskaia 1960
- 'Janenschia belongs to Plantae'
- 'Janenschia obscura belongs to Janenschia' according to Gothan 1927
- 'Jeanpaulia belongs to Ginkgophyta'
- 'Jenisseiphyton belongs to Plantae'
- 'Jenisseiphyton lebedevii belongs to Jenisseiphyton' according to Ananiev 1954
- 'Jenkinsella belongs to Gentianales'
- 'Jenkinsella apocynoides belongs to Jenkinsella' according to Reid and Chandler 1933
- 'Jidopteris belongs to Pteropsida'
- 'Jirusia belongs to Cycadophyta'
- 'Jirusia bohemica belongs to Jirusia' according to Bayer 1914
- 'Jodotella veslensis belongs to Jodotella' according to Morellet and Morellet 1913
- 'Johannophyton belongs to Plantae'
- 'Johannophyton discrepans belongs to Johannophyton' according to Dawson 1910
- 'Johnstonia belongs to Pteridophyta'
- 'Johnstonia coriaceae belongs to Johnstonia' according to Johnston 1925
- 'Jongmansia belongs to Annonaceae'
- 'Jongmansia cypreaeformis belongs to Jongmansia' according to Reid and Reid 1915
- 'Jongmansis belongs to Pteridospermophyta'
- 'Jongmansis transvaalensis belongs to Jongmansis' according to Plumstead 1958
- 'Jordania belongs to Plantae'
- 'Jordania belongs to Angiospermae'
- 'Jordania bignonioides belongs to Jordania' according to Goeppert and Fiedler 1857
- 'Jordania ebenoides belongs to Jordania' according to Schenk 1880
- 'Juglandicarya belongs to Juglandaceae'
- 'Juglandinium belongs to Plantae'
- 'Juglandinium mediterraneum belongs to Juglandinium' according to Unger 1845
- 'Juglandinium schenkii belongs to Juglandinium' according to Felix 1884
- 'Juglandinium schenkii is recombined as Caryojuglandoxylon schenkii' according to Mueller-Stoll and Maedel 1960
- 'Juglandiphyllum belongs to Angiospermae'
- 'Juglandiphyllum belongs to Magnoliopsida'
- 'Juglandiphyllum belongs to Juglandaceae'
- 'Juglandiphyllum integrifolium belongs to Juglandiphyllum' according to Fontaine 1889
- 'Juglandites belongs to Juglandaceae'
- 'Juglandoxylon belongs to Juglandaceae'
- 'Juglandoxylon mediterraneum belongs to Juglandoxylon' according to Kraus 1882
- 'Juglans denticulata belongs to Juglans' according to Heer 1869
- 'Juglans denticulata is recombined as Juglandiphyllum denticulatum' according to Koch 1963
- 'Juglans nuxtaurinensis belongs to Juglans' according to Brongniart 1822
- 'Juglans nuxtaurinensis is recombined as Juglandites nuxtaurinensis' according to Sternberg 1825
- 'Juglansoxylon belongs to Plantae'
- 'Juglansoxylon zuriensis belongs to Juglansoxylon' according to Falqui 1906
- 'Jugloxylon belongs to Juglandaceae'
- 'Jugloxylon hamaoanum belongs to Jugloxylon' according to Stopes and Fujii 1910
- 'Jungermanniopsis belongs to Marchantiophyta'
- 'Jungermanniopsis cockerellii belongs to Jungermanniopsis' according to Howe and Hollick 1922
- 'Jungermannites belongs to Marchantiophyta'
- 'Jungermannites neesianus belongs to Jungermannites' according to Goeppert 1845
- 'Junghuhnites belongs to Plantae'
- 'Junghuhnites javanicus belongs to Junghuhnites' according to Goeppert 1854
- 'Juniperites belongs to Pinales'
- 'Juniperites baccifera belongs to Juniperites' according to Unger 1843
- 'Juniperites baccifera is replaced by Widdringtonites ungeri' according to Endlicher 1847
- 'Juniperoxylon belongs to Coniferophyta'
- 'Juniperoxylon turonense belongs to Juniperoxylon' according to Houlbert 1910
- 'Junjagia belongs to Plantae'
- 'Junjagia glottophylla belongs to Junjagia' according to Neuberg 1960
- 'Juranyia belongs to Palmae'
- 'Juranyia hemiflabellata belongs to Juranyia' according to Tuzson 1908
- 'Jurusania belongs to Plantae'
- 'Jurusania cylindrica belongs to Jurusania' according to Krylov 1963
- 'Kaidacarpum belongs to Pandanaceae' according to Carruthers 1868
- 'Kaidacarpum is a subjective synonym of Araucarites' according to Seward 1919
- 'Kaidacarpum ooliticum belongs to Kaidacarpum' according to Carruthers 1868
- 'Kaidacarpum ooliticum is recombined as Pandanocarpum ooliticum' according to Zigno 1873
- 'Kaidacarpum ooliticum is recombined as Araucarites ooliticum' according to Seward 1919
- 'Kaikomako is a nomen nudum'
- 'Kaikoraia belongs to Sapotaceae'
- 'Kaikoraia gracilis belongs to Kaikoraia' according to Oliver 1936
- 'Kaipingia belongs to Lycopodiales'
- 'Kaipingia sinica belongs to Kaipingia' according to Stockmans and Mathieu 1957
- 'Kakabekia belongs to Problematica'
- 'Kalinaia belongs to Plantae'
- 'Kalinaia dekapetala belongs to Kalinaia' according to Bayer 1914
- 'Kallostachys belongs to Sphenopsida'
- 'Kallostachys scottii belongs to Kallostachys' according to Brush and Barghoorn 1955
- 'Kalmiophyllum belongs to Ericaceae'
- 'Kalmiophyllum marcodurense belongs to Kalmiophyllum' according to Kraeusel and Weyland 1959
- 'Kaloxylon belongs to Sphenopteridae'
- 'Kaloxylon hookeri belongs to Kaloxylon' according to Williamson 1875
- 'Kalymma belongs to Calamopityaceae'
- 'Kalymma grandis belongs to Kalymma' according to Unger 1856
- 'Kamaraspermum belongs to Cardiocarpales'
- 'Kamaraspermum leeanum belongs to Kamaraspermum' according to Kern 1946
- 'Kamptnerius belongs to Coccolithophorales'
- 'Kantia belongs to Plantae'
- 'Kantia philosophi belongs to Kantia' according to Pia 1912
- 'Kaokoxylon belongs to Plantae'
- 'Karkenia belongs to Ginkgoales'
- 'Karkenia incurva belongs to Karkenia' according to Archangelsky 1965
- 'Karpinskya belongs to Charophyta'
- 'Karreria belongs to Plantae'
- 'Karreria zitteli belongs to Karreria' according to Munier-Chalmas 1913
- 'Karstenia belongs to Polypodiales'
- 'Karstenia omphalostigma belongs to Karstenia' according to Goeppert 1836
- 'Katadromopteris belongs to Pteridophyta'
- 'Katadromopteris boncevi belongs to Katadromopteris' according to Hartung 1940
- 'Katangasia belongs to Plantae'
- 'Katangasia samoilovi belongs to Katangasia' according to Maslov 1937
- 'Katavia belongs to Plantae'
- 'Katavia karatavica belongs to Katavia' according to Krylov 1963
- 'Kayeoxylon belongs to Guttiferae'
- 'Kayeoxylon assamicum belongs to Kayeoxylon' according to Chowdhury and Tandan 1949
- 'Kazakhiodendron belongs to Lycopodiales'
- 'Kazakhiodendron karagandense belongs to Kazakhiodendron' according to Borsuk 1956
- 'Kazakhstanelia belongs to Plantae'
- 'Kazakhstanelia multiforma belongs to Kazakhstanelia' according to Korde 1957
- 'Keckia annulata belongs to Keckia' according to Glocker 1841
- 'Kegelidium belongs to Pteridospermophyta'
- 'Kegelidium lamegoi belongs to Kegelidium' according to Dolianiti 1954
- 'Kehonomakidium belongs to Plantae'
- 'Kehonomakidium srebrodolskae belongs to Kehonomakidium' according to Shvedov 1963
- 'Kelyphosphaera belongs to Problematica'
- 'Kenderlykia belongs to Plantae'
- 'Kenderlykia gracilis belongs to Kenderlykia' according to Turutanova-Ketova 1962
- 'Kentites belongs to Plantae'
- 'Kentites pratecinensis belongs to Kentites' according to Bureau 1896
- 'Keraiaphyllum belongs to Plantae'
- 'Keraiaphyllum suevicum belongs to Keraiaphyllum' according to Frentzen 1932
- 'Keteleerioxylon belongs to Coniferales'
- 'Keteleerioxylon arcticum belongs to Keteleerioxylon' according to Shilkina 1960
- 'Kettneria belongs to Coniferales'
- 'Kettneria elegans belongs to Kettneria' according to Corda 1926
- 'Kidstonia belongs to Pteridophyta'
- 'Kidstonia heracleensis belongs to Kidstonia' according to Zeiller 1897
- 'Kidstoniella belongs to Myxophyceae'
- 'Kidstoniella fritschi belongs to Kidstoniella' according to Croft and George 1959
- 'Kildinella belongs to Acritarcha'
- 'Kildinella giperboreica belongs to Kildinella' according to Shepeleva and Timofeev 1963
- 'Kiltorkensia belongs to Plantae'
- 'Kiltorkensia devonica belongs to Kiltorkensia' according to Johnson 1917
- 'Kinneyia belongs to Plantae'
- 'Kinneyia simulans belongs to Kinneyia' according to Walcott 1914
- 'Kirchneria belongs to Plantae'
- 'Kirchneria decurrens belongs to Kirchneria' according to Braun 1854
- 'Kirkoria belongs to Ginkgophyta'
- 'Kirkoria multifida belongs to Kirkoria' according to Zalessky 1937
- 'Kirstea belongs to Magnoliaceae'
- 'Kirstea zinkeiseni belongs to Kirstea' according to Geinitz 1936
- 'Kiselevia is a nomen nudum'
- 'Kisseljovia is a nomen nudum'
- 'Kitakamiania belongs to Plantae'
- 'Kitakamiania eguchii belongs to Kitakamiania' according to Ishijima 1943
- 'Klippsteinia belongs to Plantae'
- 'Klippsteinia medullaris belongs to Klippsteinia' according to Unger 1845
- 'Kloedenia is a subjective synonym of Quercinium' according to Edwards 1931
- 'Kloedenia quercoides belongs to Kloedenia' according to Goeppert 1839
- 'Kloedenia quercoides is recombined as Quercinium quercoides' according to Edwards 1931
- 'Klukia belongs to Schizaeaceae'
- 'Klukia exilis belongs to Klukia' according to Phillips 1890
- 'Knightiophyllum belongs to Proteaceae'
- 'Knightiophyllum belongs to Proteaceae'
- 'Kingthiophyllum is a misspelling of Knightiophyllum'
- 'Knightiophyllum primaevum belongs to Knightiophyllum' according to Ettingshausen 1887
- 'Knightites belongs to Proteaceae'
- 'Knightites salyorum belongs to Knightites' according to Saporta 1861
- 'Knorria belongs to Lycopodophyta'
- 'Knorria imbricata belongs to Knorria' according to Sternberg 1825
- 'Knorripteris belongs to Pteridophyta'
- 'Knorripteris mariana belongs to Knorripteris' according to Potonie 1897
- 'Knowltonella belongs to Matoniaceae'
- 'Kofoidopsis belongs to Dinophyceae'
- 'Kofoidopsis coronata belongs to Kofoidopsis' according to Tasch 1963
- 'Kohekohe is a nomen nudum'
- 'Kohlmannopteris is a nomen nudum'
- 'Koinostachys belongs to Sphenophyllales'
- 'Koinostachys aquensis belongs to Koinostachys' according to Remy 1955
- 'Koleoxylon belongs to Plantae'
- 'Komia belongs to Florideae'
- 'Komia abundans belongs to Komia' according to Korde 1951
- 'Koninckopora belongs to Dasycladaceae'
- 'Koninckopora inflata belongs to Koninckopora' according to de Koninck 1842
- 'Konnoa belongs to Pteridophyta'
- 'Konnoa koraiensis belongs to Konnoa' according to Tokunaga 1959
- 'Kontheria belongs to Plantae'
- 'Kontheria striata belongs to Kontheria' according to Roselt 1962
- 'Koraia belongs to Plantae'
- 'Koraia koraiensis belongs to Koraia' according to Oishi 1931
- 'Koretrophyllites belongs to Plantae'
- 'Koretrophyllites mungaticus belongs to Koretrophyllites' according to Radchenko 1955
- 'Kosmogyra belongs to Characeae'
- 'Kosmogyra superba belongs to Kosmogyra' according to Stache 1889
- 'Kosmogyrella belongs to Characeae'
- 'Kosmogyrella carinata belongs to Kosmogyrella' according to Stache 1889
- 'Kosmogyrina belongs to Charophyta'
- 'Kodmogyrina is a misspelling of Kosmogyrina'
- 'Kostinophycus belongs to Cyanobacteria'
- 'Kostinophycus irregularis belongs to Kostinophycus' according to Vologdin 1962
- 'Krannera belongs to Plantae'
- 'Krannera mirabilis belongs to Krannera' according to Corda 1866
- 'Krauselia belongs to Plantae'
- 'Krauselia verrucana belongs to Krauselia' according to Fucini 1936
- 'Kryshtofovichia belongs to Plantae'
- 'Kryshtofovichia africani belongs to Kryshtofovichia' according to Nikitin 1934
- 'Kryshtofovichiella belongs to Gymnospermae'
- 'Kryshtofovichiella modica belongs to Kryshtofovichiella' according to Sixtel 1956
- 'Ktalenia belongs to Gymnospermophyta'
- 'Ktalenia circularis belongs to Ktalenia' according to Archangelsky 1963
- 'Kunsbergia belongs to Plantae'
- 'Kunsbergia primaeva belongs to Kunsbergia' according to Corda 1847
- 'Kurria belongs to Plantae'
- 'Kurria digitata belongs to Kurria' according to Schenk 1866
- 'Kurtziana belongs to Pteridophyta'
- 'Kusbassia belongs to Plantae'
- 'Kusbassia foliata belongs to Kusbassia' according to Popova 1960
- 'Kussiella belongs to Plantae'
- 'Kussiella kussiensis belongs to Kussiella' according to Krylov 1963
- 'Kylikipteris belongs to Dicksoniaceae'
- 'Kylikipteris argula belongs to Kylikipteris' according to Lindley and Hutton 1961
- 'Laccopteris belongs to Matoniaceae'
- 'Laccopteris elegans belongs to Laccopteris' according to Presl 1838
- 'Lacoea belongs to Pteridospermophyta'
- 'Lacoea seriata belongs to Lacoea' according to Read 1946
- 'Laconiella belongs to Cycadophyta'
- 'Laconiella sardinica belongs to Laconiella' according to Krasser 1920
- 'Laestadites belongs to Pyrenomycetae'
- 'Laestadites nathorstii belongs to Laestadites' according to Meschinelli 1892
- 'Laffonia belongs to Plantae'
- 'Laffonia helvetica belongs to Laffonia' according to Heer 1877
- 'Lagenella belongs to Angiospermae'
- 'Lagenella alata belongs to Lagenella' according to Reid and Chandler 1933
- 'Lageniastrum belongs to Coelastraceae'
- 'Lageniastrum macrosporae belongs to Lageniastrum' according to Renault 1894
- 'Lageniopteris belongs to Filicinae'
- 'Lageniopteris obtusiloba belongs to Lageniopteris' according to Renault 1883
- 'Lagenoidea belongs to Angiospermae'
- 'Lagenoidea trilocularis belongs to Lagenoidea' according to Reid and Chandler 1933
- 'Lagenopteris belongs to Plantae'
- 'Lagenospermum nitidulum belongs to Lagenospermum' according to Heer 1914
- 'Lagenostoma belongs to Pteridospermophyta'
- 'Lagenostoma kidstoni belongs to Lagenostoma' according to Arber 1905
- 'Lagenostoma kidstoni is recombined as Nudospermum kidstoni' according to Stockmans and Williere 1961
- 'Lagenostoma ovoides belongs to Lagenostoma' according to Williamson 1876
- 'Lagenostoma physoides belongs to Lagenostoma' according to Williamson 1876
- 'Lagenostoma physoides is a subjective synonym of Physostoma elegans' according to Oliver 1909
- 'Lagerstroemioxylon belongs to Lythraceae'
- 'Lagerstroemioxylon durum belongs to Lagerstroemioxylon' according to Maedler 1939
- 'Lagynophora belongs to Plantae'
- 'Lagynophora liburnica belongs to Lagynophora' according to Stache 1889
- 'Laharpia belongs to Juncaginaceae'
- 'Laharpia umbellata belongs to Laharpia' according to Heer 1859
- 'Lambertia belongs to Proteaceae'
- 'Lambertia dura belongs to Lambertia' according to Velenovsky 1883
- 'Lambertia dura is recombined as Lambertiphyllum durum' according to Velenovsky 1889
- 'Lambertiphyllum belongs to Proteaceae'
- 'Laminariopsis belongs to Plantae'
- 'Laminariopsis africana belongs to Laminariopsis' according to Meunier 1904
- 'Laminarites belongs to Plantae'
- 'Laminarites cuneifolius belongs to Laminarites' according to Kurr 1845
- 'Laminarites cuneifolius is recombined as Elasmophycos cuneifolius' according to Massalongo 1859
- 'Laminopsis belongs to Plantae'
- 'Lampetia belongs to Sapindales'
- 'Lampetia lucrymabunda belongs to Lampetia' according to Koenig 1825
- 'Lamprocarpites belongs to Juncaginaceae'
- 'Lamprocarpites nitidus belongs to Lamprocarpites' according to Heer 1882
- 'Lanceolatus belongs to Peltaspermophyta'
- 'Lanceolatus derouxides belongs to Lanceolatus' according to Plumstead 1952
- 'Lancicula belongs to Codiaceae'
- 'Lancicula alta belongs to Lancicula' according to Maslov 1956
- 'Lanfrancia belongs to Cornaceae'
- 'Lanfrancia subglobosa belongs to Lanfrancia' according to Reid and Chandler 1933
- 'Langiella belongs to Myxophyceae'
- 'Langiella scourfieldi belongs to Langiella' according to Croft and George 1959
- 'Langtonia belongs to Cornaceae'
- 'Langtonia bisulcata belongs to Langtonia' according to Reid and Chandler 1933
- 'Lardizabaloxylon belongs to Lardizabalaceae'
- 'Lardizabaloxylon lardizabaloides belongs to Lardizabaloxylon' according to Schoenfeld 1954
- 'Laricites belongs to Plantae'
- 'Laricites woodwardii belongs to Laricites' according to Goeppert 1850
- 'Laricopsis belongs to Coniferophyta'
- 'Laricopsis longifolia belongs to Laricopsis' according to Fontaine 1889
- 'Larvaria reticulata belongs to Larvaria' according to Defrance 1822
- 'Laskovskia belongs to Peltaspermaceae'
- 'Laskovskia flabellata belongs to Laskovskia' according to Zalessky 1939
- 'Latanites belongs to Palmae'
- 'Latochara belongs to Charophyta'
- 'Lauraceaephyllum belongs to Lauraceae'
- 'Lauraceaephyllum stenolobatus belongs to Lauraceaephyllum' according to Koch 1963
- 'Laurinastrum belongs to Lauraceae'
- 'Laurinastrum dubium belongs to Laurinastrum' according to Unger 1862
- 'Laurinium is replaced by Lauroxylon' according to Meschinelli and Squinabol 1893
- 'Laurinium xyloides belongs to Laurinium' according to Unger 1845
- 'Laurinium xyloides is recombined as Lauroxylon xyloides' according to Meschinelli and Squinabol 1893
- 'Laurinoxylon belongs to Dicotyledonae'
- 'Laurinoxylon diluviale belongs to Laurinoxylon' according to Unger 1883
- 'Lauriphyllum belongs to Dicotyledonae'
- 'Lauriphyllum gaudini belongs to Lauriphyllum' according to Nathorst 1888
- 'Laurocalyx belongs to Lauraceae'
- 'Laurocalyx globularis belongs to Laurocalyx' according to Reid and Chandler 1933
- 'Laurocarpum belongs to Lauraceae'
- 'Laurocarpum sheppeyense belongs to Laurocarpum' according to Reid and Chandler 1933
- 'Laurogene belongs to Plantae'
- 'Laurogene cretacea belongs to Laurogene' according to Ettingshausen 1854
- 'Laurophyllites belongs to Lauraceae'
- 'Laurophyllites ocoteaeformis belongs to Laurophyllites' according to Weyland and Klipper 1963
- 'Laurophyllum belongs to Lauraceae'
- 'Laurophyllum beilschmiedioides belongs to Laurophyllum' according to Goeppert 1853
- 'Lauroxylon belongs to Plantae'
- 'Leakeyia belongs to Apocynaceae'
- 'Leakeyia vesiculosa belongs to Leakeyia' according to Chesters 1957
- 'Lebachia belongs to Coniferophyta'
- 'Lebachia piniformis belongs to Lebachia' according to Schlotheim 1938
- 'Lebephyllum belongs to Dicotyledonae'
- 'Lebephyllum reineckei belongs to Lebephyllum' according to Wilson 1913
- 'Lecaniella belongs to Acritarcha'
- 'Lecaniella margostriata belongs to Lecaniella' according to Cookson and Eisenack 1962
- 'Leckenbya belongs to Pteridophyta'
- 'Lecrosia belongs to Coniferales'
- 'Lecrosia grandeuryi belongs to Lecrosia' according to Florin 1940
- 'Lecythidoanthus belongs to Lecythidaceae'
- 'Lecythidoanthus kugleri belongs to Lecythidoanthus' according to Berry 1924
- 'Lecythidophyllum belongs to Lecythidaceae'
- 'Lecythidophyllum courataroides belongs to Lecythidophyllum' according to Berry 1923
- 'Lecythioxylon belongs to Dicotyledonae'
- 'Lecythioxylon brasiliense belongs to Lecythioxylon' according to Milanez 1935
- 'Leeoxylon belongs to Vitaceae'
- 'Leguminocarpa belongs to Plantae'
- 'Leguminocarpa sakamotoi belongs to Leguminocarpa' according to Miki 1955
- 'Leguminocarpon belongs to Leguminosae'
- 'Leguminocarpon arachioides belongs to Leguminocarpon' according to Goeppert 1855
- 'Leguminocarpum belongs to Leguminosae'
- 'Leguminocarpum anceps belongs to Leguminocarpum' according to Berry 1938
- 'Leguminosites belongs to Leguminosae'
- 'Leguminoxylon belongs to Leguminosae'
- 'Leguminoxylon burmense belongs to Leguminoxylon' according to Gupta 1936
- 'Leiodermaria belongs to Lycopodophyta'
- 'Leiodermaria lepidodendrifolia belongs to Leiodermaria' according to Brongniart 1896
- 'Leiofusa belongs to Acritarcha'
- 'Leiofusa fusiformis belongs to Leiofusa' according to Eisenack 1938
- 'Leiomarginata belongs to Acritarcha'
- 'Leiomarginata simplex belongs to Leiomarginata' according to Naumova 1961
- 'Leiominuscula belongs to Acritarcha'
- 'Leiominuscula minuta belongs to Leiominuscula' according to Naumova 1960
- 'Leiopsophosphaera belongs to Acritarcha'
- 'Leiopsophosphaera microrugosa belongs to Leiopsophosphaera' according to Naumova 1960
- 'Leiosphaera belongs to Acritarcha'
- 'Leiosphaera dictyotum belongs to Leiosphaera' according to Eisenack 1938
- 'Leiosphaera dictyotum is recombined as Dictyotidium dictyotum' according to Eisenack 1955
- 'Leiosphaera solida belongs to Leiosphaera' according to Eisenack 1938
- 'Leiosphaeridia baltica belongs to Leiosphaeridia' according to Eisenack 1958
- 'Lejeunia belongs to Dinoflagellata'
- 'Lejeunia hyalina belongs to Lejeunia' according to Gerlach 1961
- 'Lejeunites is a nomen nudum'
- 'Lemanidium belongs to Plantae'
- 'Lemoinella belongs to Dasycladaceae'
- 'Lemoinella geometrica belongs to Lemoinella' according to Morellet and Morellet 1913
- 'Lenaella reticulata belongs to Lenaella' according to Korde 1959
- 'Lennea schmidti belongs to Lennea' according to Kraeusel and Weyland 1932
- 'Lenzites belongs to Plantae'
- 'Lenzites gastaldii belongs to Lenzites' according to Heer 1859
- 'Lenzites gastaldii is recombined as Lenzitites gastaldii' according to Meschinelli 1892
- 'Lenzitites belongs to Plantae'
- 'Leonardosia belongs to Charophyta'
- 'Leonardosia langei belongs to Leonardosia' according to Sommer 1954
- 'Lepacyclotes belongs to Plantae'
- 'Lepeocaulus belongs to Lycopodophyta'
- 'Lepeocaulus aphyllus belongs to Lepeocaulus' according to Zalessky 1933
- 'Lepeocladus belongs to Plantae'
- 'Lepeocladus crassus belongs to Lepeocladus' according to Zalessky 1937
- 'Lepidanthium belongs to Cycadophyta'
- 'Lepidanthium micrirhombeum belongs to Lepidanthium' according to Schimper 1870
- 'Lepidiopsis belongs to Brassicaceae'
- 'Lepidiopsis tufacea belongs to Lepidiopsis' according to Bleicher and Fliche 1889
- 'Lepidobothrodendron belongs to Lycopodophyta'
- 'Lepidobothrodendron dobrilugkianum belongs to Lepidobothrodendron' according to Daber 1959
- 'Lepidocalamus belongs to Plantae'
- 'Lepidocalamus scutiger belongs to Lepidocalamus' according to Dawson 1906
- 'Lepidocarpaceae belongs to Lycophyta'
- 'Lepidocarpon belongs to Lycopodophyta'
- 'Lepidocarpon lomaxi belongs to Lepidocarpon' according to Scott 1900
- 'Lepidocarpopsis belongs to Lycopodophyta'
- 'Lepidocarpus belongs to Plantae'
- 'Lepidocaryopsis belongs to Plantae'
- 'Lepidocaryopsis rolloti belongs to Lepidocaryopsis' according to Berry 1929
- 'Lepidocaryopsis westphaleni belongs to Lepidocaryopsis' according to Stur 1873
- 'Lepidocarytes belongs to Plantae'
- 'Lepidocladus belongs to Lycopodophyta'
- 'Lepidocladus fuisseensis belongs to Lepidocladus' according to Vaffier 1901
- 'Lepidocystis belongs to Lepidocarpaceae'
- 'Lepidocystis pectinatus belongs to Lepidocystis' according to Lesquereux 1880
- 'Lepidodendrites belongs to Pteridopsida'
- 'Lepidodendron dichotomum belongs to Lepidodendron' according to Sternberg 1820
- 'Lepidodendron dichotomum is recombined as Lychnophorites dichotomus' according to Martius 1822
- 'Lepidodendron harcourtii is recombined as Phillipsia harcourtii' according to Presl 1838
- 'Lepidodendron harcourtii belongs to Lepidodendron' according to Witham 1833
- 'Lepidodendropsis belongs to Lycopodophyta'
- 'Lepidodendropsis hirmeri belongs to Lepidodendropsis' according to Lutz 1933
- 'Lepidofloyos is replaced by Lepidophloios'
- 'Lepidofloyos laricinum belongs to Lepidofloyos' according to Sternberg 1825
- 'Lepidofloyos laricinum is recombined as Lepidophloios laricinum'
- 'Lepidolepis belongs to Lycopodophyta'
- 'Lepidolepis imbricata belongs to Lepidolepis' according to Sternberg 1823
- 'Lepidophylloides belongs to Lepidodendrales'
- 'Lepidophyllostrobus belongs to Lycopodophyta'
- 'Lepidophyllostrobus veltheimianus belongs to Lepidophyllostrobus' according to Geinitz 1938
- 'Lepidophyllum belongs to Plantae'
- 'Lepidophyllum aciculum belongs to Lepidophyllum' according to Reed 1941
- 'Lepidophyllum aciculum is recombined as Lepidophylloides aciculum' according to Snigirevskaya 1958
- 'Lepidophyllum lanceolatum belongs to Lepidophyllum' according to Lindley and Hutton 1831
- 'Lepidophyllum lanceolatum is recombined as Lepidocarpopsis lanceolatus' according to Abbott 1963
- 'Lepidophyllum lineare belongs to Lepidophyllum' according to Brongniart 1828
- 'Lepidophyllum missouriensis belongs to Lepidophyllum' according to White 1899
- 'Lepidophyllum missouriensis is recombined as Lepidostrobopsis missouriensis' according to Abbott 1963
- 'Lepidopteris stuttgartiensis belongs to Lepidopteris' according to Jaeger 1869
- 'Lepidosigillaria belongs to Sigillariaceae'
- 'Lepidosigillaria whitei belongs to Lepidosigillaria' according to Kraeusel and Weyland 1949
- 'Lepidostrobophyllum maius belongs to Lepidostrobophyllum' according to Brongniart 1927
- 'Lepidostrobopsis belongs to Lycopodophyta'
- 'Lepidostrobus ornatus belongs to Lepidostrobus' according to Brongniart 1828
- 'Lepidotruncus belongs to Plantae'
- 'Lepidotruncus fortis belongs to Lepidotruncus' according to Fritsch 1908
- 'Lepidoxylon belongs to Cordaitales'
- 'Lepidoxylon anomalum belongs to Lepidoxylon' according to Brongniart 1878
- 'Leprophragmium belongs to Plantae'
- 'Leprospermum belongs to Cycadaceae'
- 'Leprospermum thurmanni belongs to Leprospermum' according to Heer 1877
- 'Leptocaryum belongs to Plantae'
- 'Leptocaryum avellanum belongs to Leptocaryum' according to Brongniart 1874
- 'Leptochilites belongs to Polypodiaceae'
- 'Leptochilites sarmaticus belongs to Leptochilites' according to Andreanszky 1959
- 'Leptodinium belongs to Dinophyceae'
- 'Leptodinium subtile belongs to Leptodinium' according to Klement 1960
- 'Leptolithophyllum belongs to Corallinaceae'
- 'Leptolithophyllum roveretoi belongs to Leptolithophyllum' according to Airoldi 1930
- 'Leptonema belongs to Plantae'
- 'Leptonema tenuis belongs to Leptonema' according to Smith 1896
- 'Leptophloeum belongs to Lycopodophyta'
- 'Leptophloeum rhombicum belongs to Leptophloeum' according to Dawson 1862
- 'Leptophycus belongs to Cyanobacteria'
- 'Leptophycus belongs to Problematica'
- 'Leptophycus belongs to Plantae'
- 'Leptophycus gracilis belongs to Leptophycus' according to Johnson 1940
- 'Leptophycus varsanofievae belongs to Leptophycus' according to Korde 1954
- 'Leptophycus venosus belongs to Leptophycus' according to Barrande 1908
- 'Leptoplasmium belongs to Plantae'
- 'Leptopterophyllum belongs to Cycadophyta'
- 'Leptopterophyllum nathorsti belongs to Leptopterophyllum' according to Seward 1930
- 'Leptospermites belongs to Myrtaceae'
- 'Leptospermites spicatus belongs to Leptospermites' according to Schmalhausen 1883
- 'Leptospermocarpum belongs to Myrtaceae'
- 'Leptospermocarpum herzogenrothense belongs to Leptospermocarpum' according to Menzel 1913
- 'Leptosphaerites belongs to Fungi'
- 'Leptosphaerites lemoinii belongs to Leptosphaerites' according to Richon 1885
- 'Leptostrobus belongs to Taxodiaceae'
- 'Leptostrobus laxiflora belongs to Leptostrobus' according to Heer 1876
- 'Leptostromataceae belongs to Fungi'
- 'Leptostromium belongs to Plantae'
- 'Leptotesta belongs to Plantae'
- 'Leptotesta grandeuryi belongs to Leptotesta' according to Loubiere 1929
- 'Leptothriomyces belongs to Leptostromataceae'
- 'Leptothriomyces zonatus belongs to Leptothriomyces' according to Kraeusel 1929
- 'Leptotrichites belongs to Schizomycetes'
- 'Leptotrichites buccalis belongs to Leptotrichites' according to Robin and Lebour 1898
- 'Leptoxylum belongs to Plantae'
- 'Leptoxylum geminium belongs to Leptoxylum' according to Corda 1845
- 'Lepyrosphaera belongs to Plantae'
- 'Lerouxia belongs to Bennettitales'
- 'Lerouxia transvaalesis belongs to Lerouxia' according to Plumstead 1958
- 'Lesangeana belongs to Plantae'
- 'Lesangeana remota belongs to Lesangeana' according to Blanckenhorn 1885
- 'Lesangeana voltzii belongs to Lesangeana' according to Schimper 1906
- 'Lescuria belongs to Plantae'
- 'Lescuria attenuata belongs to Lescuria' according to Perkins 1906
- 'Lescuropteris belongs to Pteridophyta'
- 'Lesleya belongs to Glossopteridaceae'
- 'Lesleya grandis belongs to Lesleya' according to Lesquereux 1880
- 'Leucadendrites belongs to Proteaceae'
- 'Leucadendrites sextinctus belongs to Leucadendrites' according to Saporta 1862
- 'Leucospermites is a nomen nudum'
- 'Leveilleites belongs to Problematica'
- 'Leveilleites hartnageli belongs to Leveilleites' according to Foerste 1923
- 'Levicaulis belongs to Lycopodophyta'
- 'Levicaulis arranensis belongs to Levicaulis' according to Beck 1958
- 'Leyrida belongs to Angiospermae'
- 'Leyrida bilocularis belongs to Leyrida' according to Reid and Chandler 1933
- 'Lianophycus belongs to Problematica'
- 'Lianophycus polyfrons belongs to Lianophycus' according to Herzer 1902
- 'Liasophycus belongs to Plantae'
- 'Liasophycus scythothalioides belongs to Liasophycus' according to Fliche 1909
- 'Liaspermum belongs to Plantae'
- 'Liaspermum dissectum belongs to Liaspermum' according to Zigno 1916
- 'Libocedrites belongs to Coniferophyta'
- 'Libocedroxylon belongs to Coniferales'
- 'Libocedroxylon austrocedroides belongs to Libocedroxylon' according to Khudaiberdyev 1958
- 'Licrophycus belongs to Problematica'
- 'Licrophycus ottawaensis belongs to Licrophycus' according to Billings 1862
- 'Lidgettonia belongs to Glossopteridaceae'
- 'Lidgettonia africana belongs to Lidgettonia' according to Thomas 1958
- 'Lillia belongs to Plantae'
- 'Lillia viticulosa belongs to Lillia' according to Unger 1842
- 'Limnocarpus belongs to Liliopsida'
- 'Limnocarpus headonensis belongs to Limnocarpus' according to Gardner 1898
- 'Limnophycus belongs to Phaeophyceae'
- 'Limnophycus paradoxus belongs to Limnophycus' according to Kirchheimer 1930
- 'Limnophyllum belongs to Angiospermae'
- 'Limnophyllum primaevum belongs to Limnophyllum' according to Hosius and Marck 1880
- 'Linguifolium belongs to Glossopteridaceae'
- 'Linoporella belongs to Dasycladaceae'
- 'Linoporella capriotica belongs to Linoporella' according to Oppenheim 1899
- 'Linopteridium belongs to Plantae'
- 'Linopteridium densenervosa belongs to Linopteridium' according to Egeman 1958
- 'Linopteris belongs to Neuropteridae'
- 'Linopteris gutbieriana belongs to Linopteris' according to Presl 1838
- 'Linosporoidea belongs to Fungi'
- 'Linosporoidea populi belongs to Linosporoidea' according to Keller 1895
- 'Liquidambaroxylon belongs to Hamamelidaceae'
- 'Liquidambaroxylon speciosum belongs to Liquidambaroxylon' according to Felix 1884
- 'Liriodendropsis belongs to Magnoliaceae'
- 'Liriodendropsis simplex belongs to Liriodendropsis' according to Newberry 1895
- 'Liriophyllum belongs to Magnoliaceae'
- 'Liriophyllum beckwithii belongs to Liriophyllum' according to Lesquereux 1878
- 'Listrodium belongs to Plantae'
- 'Listrodium uninervium belongs to Listrodium' according to Zalessky 1937
- 'Listrophyllum belongs to Pteridophyta'
- 'Listrophyllum uscatense belongs to Listrophyllum' according to Zalessky 1934
- 'Litanaia belongs to Codiaceae'
- 'Litanaia mira belongs to Litanaia' according to Maslov 1956
- 'Lithangium belongs to Plantae'
- 'Lithangium ovoides belongs to Lithangium' according to Pant and Nautiyal 1960
- 'Litharchaeocystis belongs to Chrysophyceae'
- 'Litharchaeocystis costata belongs to Litharchaeocystis' according to Deflandre 1932
- 'Litheusphaerella belongs to Chrysomonads'
- 'Litheusphaerella spectabilis belongs to Litheusphaerella' according to Deflandre 1932
- 'Lithiotis problematica belongs to Lithiotis' according to Gümbel 1871
- 'Lithobryon belongs to Plantae'
- 'Lithobryon calcareum belongs to Lithobryon' according to Ruprecht 1866
- 'Lithocaulon belongs to Plantae'
- 'Lithocaulon minius belongs to Lithocaulon' according to Meneghini 1857
- 'Lithocodium belongs to Codiaceae'
- 'Lithodictuon belongs to Plantae'
- 'Lithodictuon beckii belongs to Lithodictuon' according to Conrad 1837
- 'Lithodinia belongs to Dinophyceae'
- 'Lithodinia jurassica belongs to Lithodinia' according to Eisenack 1935
- 'Lithomyxa belongs to Plantae'
- 'Lithomyxa calcigena belongs to Lithomyxa' according to Howe 1932
- 'Lithoperidinium belongs to Dinophyceae'
- 'Lithoperidinium oamaruense belongs to Lithoperidinium' according to Deflandre 1933
- 'Lithophyllodendron belongs to Plantae'
- 'Lithophyllodendron rubrum belongs to Lithophyllodendron' according to Musper 1919
- 'Lithorhiza belongs to Plantae'
- 'Lithorhiza tenuirama belongs to Lithorhiza' according to Pant 1958
- 'Lithospermites belongs to Boraginaceae'
- 'Lithostachys belongs to Problematica'
- 'Lithostachys alpina belongs to Lithostachys' according to Fischer-Ooster 1858
- 'Lithothamniscum belongs to Plantae'
- 'Lithothamniscum nahaense belongs to Lithothamniscum' according to Heydrich 1900
- 'Lithothamnites belongs to Plantae'
- 'Lithothamnites croizieri belongs to Lithothamnites' according to Saporta 1882
- 'Lithoxylon belongs to Plantae'
- 'Lithoxylon arenaceum belongs to Lithoxylon' according to Jaeger 1827
- 'Lithraphidites belongs to Microrhabdulaceae'
- 'Lithuropyxis belongs to Chrysomonads'
- 'Lithuropyxis barbadensis belongs to Lithuropyxis' according to Deflandre 1933
- 'Litopora belongs to Dasycladaceae'
- 'Litopora spatiosa belongs to Litopora' according to Johnson 1964
- 'Litostrobus belongs to Sphenophyllales'
- 'Litostrobus iowensis belongs to Litostrobus' according to Mamay 1954
- 'Litostroma belongs to Plantae'
- 'Litostroma oklahomense belongs to Litostroma' according to Mamay 1959
- 'Litsaeophyllum belongs to Lauraceae'
- 'Litsaeophyllum wingellense belongs to Litsaeophyllum' according to Deane 1902
- 'Litseopsis belongs to Lauraceae'
- 'Litseopsis rottensis belongs to Litseopsis' according to Weyland 1938
- 'Liversidgea belongs to Plantae'
- 'Liversidgea oxyspora belongs to Liversidgea' according to Mueller 1877
- 'Lobatannularia belongs to Equisetales'
- 'Lobatannularia inequifolia belongs to Lobatannularia' according to Tokunaga 1927
- 'Lobaticarpum belongs to Anacardiaceae'
- 'Lobaticarpum variabile belongs to Lobaticarpum' according to Reid and Chandler 1933
- 'Lobatopteris belongs to Filicinae'
- 'Lobatopteris vestita belongs to Lobatopteris' according to Lesquereux 1958
- 'Lobatoxylon belongs to Gymnospermophyta'
- 'Lochmophycus belongs to Problematica'
- 'Lochmophycus caulerpoides belongs to Lochmophycus' according to Debey and Ettingshausen 1859
- 'Logania is replaced by Loganiella' according to Stolley 1926
- 'Logania canadensis belongs to Logania' according to Stolley 1925
- 'Logania canadensis is recombined as Loganiella canadensis' according to Stolley 1926
- 'Loganiella belongs to Psilophytales'
- 'Loganophyton belongs to Psilophytales'
- 'Loganophyton dawsoni belongs to Loganophyton' according to Kraeusel and Weyland 1961
- 'Lomarites belongs to Plantae'
- 'Lomarites pectinata belongs to Lomarites' according to Hector 1886
- 'Lomatites belongs to Proteaceae'
- 'Lomatites acerosus belongs to Lomatites' according to Saporta 1862
- 'Lomatites aquensis belongs to Lomatites' according to Saporta 1862
- 'Lomatites aquensis is recombined as Baccharites aquensis' according to Saporta 1881
- 'Lomatofloyos belongs to Lycopodophyta'
- 'Lomatophloios is a misspelling of Lomatofloyos'
- 'Lomatofloyos crassicaule belongs to Lomatofloyos' according to Corda 1838
- 'Lomatopteris belongs to Pteridophyta'
- 'Lomatopteris jurensis belongs to Lomatopteris' according to Kurr 1869
- 'Lomentarites belongs to Rhodophyceae'
- 'Lomentarites borneti belongs to Lomentarites' according to Fliche 1905
- 'Lonchopteris bricii belongs to Lonchopteris' according to Brongniart 1835
- 'Lonchopteris mantelli belongs to Lonchopteris' according to Brongniart 1835
- 'Lonchopteris mantelli is recombined as Polypodites mantelli' according to Goeppert 1836
- 'Lontzenia belongs to Filicales'
- 'Lontzenia diplotmematoides belongs to Lontzenia' according to Stockmans and Williere 1953
- 'Loperia simplex belongs to Loperia' according to Newberry 1888
- 'Lophiodendron belongs to Lycopodophyta'
- 'Lophiodendron tyrganense belongs to Lophiodendron' according to Zalessky 1936
- 'Lophoderma belongs to Lycopodophyta'
- 'Lophoderma sibirica belongs to Lophoderma' according to Zalessky 1937
- 'Lophodiacrodium belongs to Acritarcha'
- 'Lophodiacrodium obtusum belongs to Lophodiacrodium' according to Timofeev 1958
- 'Lophodolithus belongs to Plantae'
- 'Lophodolithus mochlophorus belongs to Lophodolithus' according to Deflandre 1954
- 'Lophominuscula belongs to Acritarcha'
- 'Lophominuscula prima belongs to Lophominuscula' according to Naumova 1960
- 'Lophorytidodiacrodium belongs to Acritarcha'
- 'Lophorytidodiacrodium bubnoffi belongs to Lophorytidodiacrodium' according to Timofeev 1958
- 'Lophosphaeridium belongs to Acritarcha'
- 'Lophosphaeridium rarum belongs to Lophosphaeridium' according to Timofeev 1959
- 'Lophozonodiacrodium belongs to Acritarcha'
- 'Lopinopteris belongs to Pteridophyta'
- 'Lopinopteris intercalata belongs to Lopinopteris' according to Sze 1958
- 'Loranthacites belongs to Loranthaceae'
- 'Loranthacites succineus belongs to Loranthacites' according to Conwentz 1886
- 'Loranthophyllum belongs to Loranthaceae'
- 'Loranthophyllum griselinia belongs to Loranthophyllum' according to Unger 1864
- 'Loxopteris belongs to Pteridophyta'
- 'Loxopteris adiontoides belongs to Loxopteris' according to Pomel 1846
- 'Ludoviopsis belongs to Pandanaceae'
- 'Ludoviopsis discerpta belongs to Ludoviopsis' according to Saporta 1868
- 'Luheopsis belongs to Plantae'
- 'Luheopsis dissymetra belongs to Luheopsis' according to Langeron 1900
- 'Lunulidia belongs to Acritarcha'
- 'Lunulidia lunula belongs to Lunulidia' according to Eisenack 1958
- 'Lunzia belongs to Cycadophyta'
- 'Lunzia austriaca belongs to Lunzia' according to Krasser 1918
- 'Lychnophorites belongs to Lepidodendraceae'
- 'Lycopodiolites filiciformis belongs to Lycopodiolites' according to Schlotheim 1820
- 'Lycopodiolites filiciformis is recombined as Walchia filiciformia' according to Sternberg 1825
- 'Lycopodiolithes belongs to Lycopodophyta'
- 'Lycopodiolites is a misspelling of Lycopodiolithes'
- 'Lycopodiolithes arboreus belongs to Lycopodiolithes' according to Schlotheim 1820
- 'Lycopodiophloios belongs to Lycopodophyta'
- 'Lycopodiophloios dolianitii belongs to Lycopodiophloios' according to Kraeusel 1961
- 'Lycopodiopsis belongs to Lycopodophyta'
- 'Lycopodiopsis derbyi belongs to Lycopodiopsis' according to Renault 1890
- 'Lycopodites belongs to Lycopodophyta' according to Brongniart 1822
- 'Lycopodites belongs to Coniferophyta' according to Seward 1910
- 'Lycopodites taxiformis belongs to Lycopodites' according to Brongniart 1822
- 'Lycopogenia belongs to Lepidodendrales'
- 'Lycopogenia callicyrta belongs to Lycopogenia' according to Read 1936
- 'Lycostachys belongs to Lycopodophyta'
- 'Lycostachys protostelicus belongs to Lycostachys' according to Pant and Walton 1961
- 'Lycostrobus belongs to Lycopodophyta'
- 'Lycostrobus scotti belongs to Lycostrobus' according to Nathorst 1908
- 'Lycoxylon belongs to Lycopodiaceae'
- 'Lycoxylon indicum belongs to Lycoxylon' according to Srivastava 1946
- 'Lyginodendron belongs to Lycopodophyta'
- 'Lyginodendron landsburgii belongs to Lyginodendron' according to Gourlie 1843
- 'Lyginopteris belongs to Pteridospermophyta'
- 'Lyginorachis belongs to Pteridospermophyta'
- 'Lyginorachis papilio belongs to Lyginorachis' according to Kidston 1923
- 'Lygodites belongs to Pteridophyta'
- 'Lyonothamnoxylon belongs to Rosaceae'
- 'Lyonothamnoxylon nevadensis belongs to Lyonothamnoxylon' according to Page 1964
- 'Lyonsiaephyllum belongs to Apocynaceae'
- 'Lyonsiaephyllum duni belongs to Lyonsiaephyllum' according to Deane 1907
- 'Lyrasperma belongs to Pteridospermophyta'
- 'Lyssoxylon belongs to Williamsoniaceae'
- 'Lyssoxylon grigsbyi belongs to Lyssoxylon' according to Daugherty 1941
- 'Lythrum tetrasepalum belongs to Lythrum' according to Miki 1959
- 'Lythrum tetrasepalum is recombined as Eotrapa tetrasepalum' according to Miki 1961
- 'Macarangaephyllum belongs to Euphorbiaceae'
- 'Macarangaephyllum palaeomonadrum belongs to Macarangaephyllum' according to Rasky 1965
- 'Macclintockia belongs to Proteaceae'
- 'Macclintockia dentata belongs to Macclintockia' according to Heer 1866
- 'Machairostrobus belongs to Plantae'
- 'Machairostrobus laxus belongs to Machairostrobus' according to Prinada 1950
- 'Macralethopteris belongs to Plantae'
- 'Macralethopteris hallei belongs to Macralethopteris' according to Jongmans and Gothan 1935
- 'Macrocystites belongs to Plantae'
- 'Macrocystites similis belongs to Macrocystites' according to Fucini 1936
- 'Macroglossopteris belongs to Plantae'
- 'Macroglossopteris leeiana belongs to Macroglossopteris' according to Sze 1931
- 'Macroporella dinarica belongs to Macroporella' according to Pia 1912
- 'Macropterygium belongs to Cycadophyta'
- 'Macrosphenopteris belongs to Sphenopteridae'
- 'Macrosphenopteris lindsaeoides belongs to Macrosphenopteris' according to Kidston 1887
- 'Macrostachya belongs to Coniferophyta'
- 'Macrostachya caudata belongs to Macrostachya' according to Weiss 1876
- 'Macrostachya caudata is recombined as Anastachys caudata' according to Remy 1955
- 'Macrostachya infundibuliformis belongs to Macrostachya' according to Bronn 1869
- 'Macrotaenia belongs to Marattiaceae'
- 'Macrotaenia fertilis belongs to Macrotaenia' according to Frenguelli 1943
- 'Macrotaeniopteris belongs to Cycadophyta'
- 'Macrotorellia belongs to Cycadophyta'
- 'Macrotorellia hoshayahiana belongs to Macrotorellia' according to Kryshtofovich 1927
- 'Madygenia belongs to Pteridophyta'
- 'Madygenopteris belongs to Filicinae'
- 'Maedleriella belongs to Charophyta'
- 'Maedlerisphaera belongs to Charophyta'
- 'Maedlerisphaera ulmensis belongs to Maedlerisphaera' according to Straub 1959
- 'Maffeija is a nomen nudum'
- 'Magnoliaephyllum belongs to Magnoliaceae'
- 'Magnoliaephyllum alternans belongs to Magnoliaephyllum' according to Heer 1926
- 'Magnoliaespermum belongs to Magnoliaceae'
- 'Magnoliaespermum fliegeli belongs to Magnoliaespermum' according to Kirchheimer 1934
- 'Magnoliaestrobus belongs to Magnoliaceae'
- 'Magnoliaestrobus gilmouri belongs to Magnoliaestrobus' according to Seward and Conway 1935
- 'Magnolilepis belongs to Magnoliaceae'
- 'Magnolilepis orussica belongs to Magnolilepis' according to Conwentz 1886
- 'Magnolioides belongs to Magnoliaceae'
- 'Magnolioides carniolica belongs to Magnolioides' according to Ettingshausen 1885
- 'Magnolioxylon belongs to Magnoliaceae'
- 'Magnolioxylon michelioides belongs to Magnolioxylon' according to Hofmann 1952
- 'Magnoliphyllum belongs to Magnoliaceae'
- 'Magnoliophyllum is a misspelling of Magnoliphyllum'
- 'Magnoliphyllum balticum belongs to Magnoliphyllum' according to Conwentz 1886
- 'Magnolites is a subjective synonym of Dryoxylon' according to Edwards 1931
- 'Magnolites silvatica belongs to Magnolites' according to Tuzson 1909
- 'Maheshwariella belongs to Plantae'
- 'Maheshwariella bicornuta belongs to Maheshwariella' according to Pant and Nautiyal 1963
- 'Majaella belongs to Plantae'
- 'Majaella verkhojanica belongs to Majaella' according to Vologdin and Maslov 1960
- 'Majanthemophyllum belongs to Smilaceae'
- 'Malacotesta belongs to Plantae'
- 'Malacotesta oblonga belongs to Malacotesta' according to Williamson 1876
- 'Mallotophyllum belongs to Euphorbiaceae'
- 'Mallotophyllum palaeomiquelianum belongs to Mallotophyllum' according to Rasky 1965
- 'Mallotoxylon belongs to Euphorbiaceae'
- 'Mallotoxylon keriense belongs to Mallotoxylon' according to Lakhanpal and Dayal 1964
- 'Malpighiastrum belongs to Malpighiaceae'
- 'Malpighiastrum procrustae belongs to Malpighiastrum' according to Unger 1850
- 'Malvacarpus belongs to Malvaceae'
- 'Malvocarpon belongs to Malvaceae'
- 'Malvocarpon clarum belongs to Malvocarpon' according to Hollick 1928
- 'Mamillaria belongs to Plantae'
- 'Mamillaria desnoyersii belongs to Mamillaria' according to Brongniart 1825
- 'Mammaeites belongs to Clusiaceae'
- 'Mammaeites francheti belongs to Mammaeites' according to Fliche 1896
- 'Manchuriophycus belongs to Problematica'
- 'Manchuriophycus yamamotoi belongs to Manchuriophycus' according to Endo 1933
- 'Manchurostachys belongs to Equisetales'
- 'Manchurostachys manchuriensis belongs to Manchurostachys' according to Kon'no 1960
- 'Manebachia belongs to Cycadopsida'
- 'Manebachia polysporangiata belongs to Manebachia' according to Remy and Remy 1958
- 'Manicarites belongs to Plantae'
- 'Manihotites belongs to Euphorbiaceae'
- 'Manihotites georgiana belongs to Manihotites' according to Berry 1910
- 'Mansurkella belongs to Cyanobacteria'
- 'Mansurkella densa belongs to Mansurkella' according to Vologdin 1962
- 'Mantellia belongs to Plantae'
- 'Mantellia babbogensis belongs to Mantellia' according to Woodward 1885
- 'Mantellia babbogensis is recombined as Nathorstianella babbogensis' according to Glaessner and Rao 1955
- 'Mantellia megalophylla belongs to Mantellia' according to Buckland 1837
- 'Mantellia nidiformis belongs to Mantellia' according to Brongniart 1828
- 'Mantellia nidiformis is recombined as Echinostipes nidiformis' according to Pomel 1849
- 'Marantoidea belongs to Cycadopsida'
- 'Marantoidea arenacea belongs to Marantoidea' according to Jaeger 1827
- 'Marattiopsis belongs to Marattiaceae'
- 'Marattiotheca belongs to Marattiaceae'
- 'Marattiotheca grandeuryi belongs to Marattiotheca' according to Schimper 1879
- 'Marattites belongs to Pteridophyta'
- 'Marattites desideratus belongs to Marattites' according to Marion and Laurent 1898
- 'Marchantiolites belongs to Marchantiales'
- 'Marchantiolites porosus belongs to Marchantiolites' according to Lundblad 1954
- 'Marchantites belongs to Marchantiophyta'
- 'Marchantites (Fucoides) erectus belongs to Marchantites (Fucoides)' according to Leckenby 1864
- 'Marchantites (Fucoides) erectus is recombined as Thallites erectus' according to Walton 1925
- 'Marchantites sesannensis belongs to Marchantites' according to Brongniart 1849
- 'Marchantites sinuatus belongs to Marchantites' according to Saporta 1865
- 'Marcoduria belongs to Helobiae'
- 'Marcoduria inopinata belongs to Marcoduria' according to Weyland 1957
- 'Margaritopteris belongs to Pteridophyta'
- 'Margaritopteris pseudocoemansi belongs to Margaritopteris' according to Gothan 1913
- 'Margominuscula belongs to Acritarcha'
- 'Margominuscula rugosa belongs to Margominuscula' according to Naumova 1960
- 'Mariminna belongs to Plantae'
- 'Mariminna meneghinii belongs to Mariminna' according to Unger 1843
- 'Mariopteris nervosa belongs to Mariopteris' according to Brongniart 1879
- 'Maroesia belongs to Lycopodophyta'
- 'Maroesia rhomboidea belongs to Maroesia' according to Jongmans and Gothan 1935
- 'Marpolia belongs to Cyanobacteria'
- 'Marsilidium belongs to Plantae'
- 'Marsilidium speciosum belongs to Marsilidium' according to Schenk 1871
- 'Marskea belongs to Taxopsida'
- 'Marskea thomasiana belongs to Marskea' according to Florin 1958
- 'Martinia is a nomen nudum'
- 'Martjanowskia belongs to Problematica'
- 'Martjanowskia angarica belongs to Martjanowskia' according to Radchenko 1956
- 'Martyia belongs to Leguminosae'
- 'Martyia naviculaeformis belongs to Martyia' according to Reid 1924
- 'Marzaria belongs to Pteridophyta'
- 'Marzaria paroliniana belongs to Marzaria' according to Zigno 1865
- 'Masculostrobus belongs to Coniferales'
- 'Masculostrobus zeilleri belongs to Masculostrobus' according to Seward 1911
- 'Maslovichara belongs to Charophyta'
- 'Maslovichara gracilis belongs to Maslovichara' according to Saidakovsky 1962
- 'Massulites belongs to Salviniaceae'
- 'Massulites coelatus belongs to Massulites' according to Sahni and Rao 1943
- 'Mastixicarpum belongs to Cornaceae'
- 'Mastixicarpum crassum belongs to Mastixicarpum' according to Chandler 1926
- 'Mastixioidea belongs to Plantae'
- 'Mastixioidea tectocaryoides belongs to Mastixioidea' according to Kirchheimer 1936
- 'Mastixioidiocarpum belongs to Cornaceae'
- 'Mastixioidiocarpum oregonese belongs to Mastixioidiocarpum' according to Scott 1954
- 'Mastixiopsis belongs to Cornaceae'
- 'Mastocarpites belongs to Plantae'
- 'Mastopora belongs to Plantae'
- 'Mastopora concava belongs to Mastopora' according to Eichwald 1840
- 'Matharakia belongs to Plantae'
- 'Matharakia inopinata belongs to Matharakia' according to Chirkova-Zalessaia 1964
- 'Matonidium belongs to Matoniaceae'
- 'Matonidium goepperti belongs to Matonidium' according to Ettingshausen 1871
- 'Matoniella belongs to Matoniaceae'
- 'Matoniella wiesneri belongs to Matoniella' according to Krasser 1936
- 'Maucheria belongs to Plantae'
- 'Maucheria gemundensis belongs to Maucheria' according to Broili 1928
- 'Mauerites artinensis belongs to Mauerites' according to Zalessky 1933
- 'Maupasia belongs to Dasycladaceae'
- 'Maupasia dumasi belongs to Maupasia' according to Morellet and Morellet 1917
- 'Maupasina is replaced by Maupasia' according to Morellet and Morellet 1917
- 'Mawsonella belongs to Problematica'
- 'Mawsonella wooltanensis belongs to Mawsonella' according to Chapman 1927
- 'Mayogynophyllum belongs to Annonaceae'
- 'Mayogynophyllum paucinervium belongs to Mayogynophyllum' according to Kraeusel 1929
- 'Mazocarpon belongs to Sigillariaceae'
- 'Mazocarpon shorense belongs to Mazocarpon' according to Benson 1918
- 'Mazostachys belongs to Calamitales'
- 'Mazostachys pedulata belongs to Mazostachys' according to Kosanke 1955
- 'Medullopitys belongs to Cordaitales'
- 'Medullopitys sclerotica belongs to Medullopitys' according to Gothan 1928
- 'Medullosa belongs to Plantae'
- 'Medullosa anglica belongs to Medullosa' according to Scott 1899
- 'Medullosa anglica is recombined as Pecopteromedullosa anglica' according to Lotsy 1909
- 'Medullosa elegans belongs to Medullosa' according to Cotta 1832
- 'Medullosa elegans is recombined as Myeloxylon elegans' according to Brongniart 1849
- 'Medullosa ludwigii belongs to Medullosa' according to Goeppert and Leuckart 1881
- 'Medullosa ludwigii is recombined as Steloxylon ludwigii' according to Solms-Laubach 1897
- 'Medullosa stellata is recombined as Neuropteromedullosa stellata' according to Lotsy 1909
- 'Medullosa stellata belongs to Medullosa' according to Cotta 1832
- 'Medullosites belongs to Pteridophyta'
- 'Medullosites mammiger belongs to Medullosites' according to Bureau 1914
- 'Medulloxylon belongs to Plantae'
- 'Megadendron belongs to Plantae'
- 'Megadendron saxonicum belongs to Megadendron' according to Reichenbach 1836
- 'Megalomyelon belongs to Pinaceae'
- 'Megalomyelon myriodesmon belongs to Megalomyelon' according to Cribbs 1940
- 'Megalopteris belongs to Pteridophyta'
- 'Megalopteris nicotianaefolia belongs to Megalopteris' according to Schenk 1883
- 'Megalorhachis belongs to Plantae'
- 'Megalorhachis elliptica belongs to Megalorhachis' according to Unger 1856
- 'Megalospermum belongs to Plantae'
- 'Megalospermum wildii belongs to Megalospermum' according to Kidston 1914
- 'Megaloxylon belongs to Pteridospermophyta'
- 'Megaloxylon scotti belongs to Megaloxylon' according to Seward 1899
- 'Megalozamia belongs to Cycadophyta'
- 'Megalozamia falciformis belongs to Megalozamia' according to Hosius and Marck 1880
- 'Megaphyton frondosum belongs to Megaphyton' according to Artis 1825
- 'Megaporoxylon belongs to Gymnospermophyta'
- 'Megaporoxylon kaokense belongs to Megaporoxylon' according to Kraeusel 1956
- 'Megasacculina belongs to Acritarcha'
- 'Megasacculina atava belongs to Megasacculina' according to Naumova 1960
- 'Megatheca is a subjective synonym of Calathospermum'
- 'Megatheca thomasii belongs to Megatheca' according to Andrews 1940
- 'Megistophyllum belongs to Plantae'
- 'Megistophyllum leanzai belongs to Megistophyllum' according to Archangelsky 1958
- 'Mehtaia belongs to Coniferales'
- 'Mehtaia rajmahalensis belongs to Mehtaia' according to Vishnu-Mittre 1958
- 'Meibomites belongs to Papilionaceae'
- 'Mejerella belongs to Plantae'
- 'Mejerella ramosa belongs to Mejerella' according to Korde 1950
- 'Melanconiaceae belongs to Melanconiales'
- 'Melanconiales belongs to Fungi'
- 'Melanconites is a nomen nudum'
- 'Melanosphaerites belongs to Fungi'
- 'Melanosphaerites devonicus belongs to Melanosphaerites' according to Gruess 1928
- 'Melanosporites belongs to Fungi'
- 'Melanosporites stefanii belongs to Melanosporites' according to Pampaloni 1902
- 'Melastomaceophyllum belongs to Melastomataceae'
- 'Melastomaceophyllum geyleri belongs to Melastomaceophyllum' according to Kraeusel 1929
- 'Melastomites belongs to Melastomataceae'
- 'Melastomites druidum belongs to Melastomites' according to Unger 1850
- 'Meliaceaecarpum belongs to Meliaceae'
- 'Meliaceaecarpum ligniticum belongs to Meliaceaecarpum' according to Menzel 1913
- 'Meliaceophyllum belongs to Meliaceae'
- 'Meliaceophyllum marcodurense belongs to Meliaceophyllum' according to Kraeusel and Weyland 1959
- 'Melicarya belongs to Meliaceae'
- 'Melicarya variabilis belongs to Melicarya' according to Reid and Chandler 1933
- 'Melicytephyllites is a nomen nudum'
- 'Melitoxylon belongs to Plantae'
- 'Melitoxylon ungeri belongs to Melitoxylon' according to Hartig 1848
- 'Melobesites belongs to Plantae'
- 'Melobesites membranacea belongs to Melobesites' according to Massalongo 1857
- 'Melophytum belongs to Plantae'
- 'Melophytum cyclostigma belongs to Melophytum' according to Debey and Ettingshausen 1859
- 'Membranilarnacia belongs to Dinophyceae'
- 'Membranilarnacia leptoderma belongs to Membranilarnacia' according to Eisenack 1963
- 'Membranilarnax belongs to Dinophyceae'
- 'Membranilarnax pterospermoides belongs to Membranilarnax' according to Wetzel 1933
- 'Membranites belongs to Plantae'
- 'Membranolimbus belongs to Acritarcha'
- 'Membranolimbus triangulatus belongs to Membranolimbus' according to Maljavkina 1961
- 'Membranophoridium belongs to Dinophyceae'
- 'Membranophoridium aspinatum belongs to Membranophoridium' according to Gerlach 1961
- 'Membranosphaera belongs to Acritarcha'
- 'Membranosphaera maastrichtica belongs to Membranosphaera' according to Samoilovitch 1961
- 'Meminella belongs to Dasycladaceae'
- 'Meminella larvarioides belongs to Meminella' according to Morellet and Morellet 1913
- 'Mengea belongs to Rosaceae'
- 'Mengea palaeogena belongs to Mengea' according to Conwentz 1886
- 'Meniphylloides belongs to Polypodiaceae'
- 'Meniphylloides ettingshauseni belongs to Meniphylloides' according to Berry 1916
- 'Meniphyllum belongs to Aspideae'
- 'Menispermacites is a nomen nudum'
- 'Menispermicarpum belongs to Menispermaceae'
- 'Menispermicarpum crenulatum belongs to Menispermicarpum' according to Chesters 1957
- 'Menispermites belongs to Menispermaceae'
- 'Menispermophyllum belongs to Dicotyledonae'
- 'Menispermophyllum celakovskii belongs to Menispermophyllum' according to Velenovsky 1901
- 'Menopteris belongs to Pteridophyta'
- 'Menopteris dubia belongs to Menopteris' according to Cotta 1889
- 'Menyphyllum is replaced by Meniphyllum' according to Ettingshausen 1879
- 'Meristophyllum belongs to Plantae'
- 'Meristophyllum sojanaeanum belongs to Meristophyllum' according to Zalessky 1937
- 'Meristopteris belongs to Plantae'
- 'Meristopteris laciniata belongs to Meristopteris' according to Zalessky 1937
- 'Mertensites belongs to Gleicheniaceae'
- 'Mertensites hantoniensis belongs to Mertensites' according to Wanklyn 1869
- 'Mesembrioxylon belongs to Podocarpaceae'
- 'Mesidiophyton belongs to Sphenophyllales'
- 'Mesidiophyton paulus belongs to Mesidiophyton' according to Leisman 1964
- 'Mesocalamites belongs to Calamitaceae'
- 'Mesochara belongs to Charophyta'
- 'Mesodescolea belongs to Pteridophyta'
- 'Mesodescolea plicata belongs to Mesodescolea' according to Archangelsky 1963
- 'Mesolithon belongs to Corallinaceae'
- 'Mesolithon lithothamnoides belongs to Mesolithon' according to Maslov 1955
- 'Mesolonchopteris belongs to Osmundaceae'
- 'Mesoneuraster belongs to Plantae'
- 'Mesoneuraster cordatus belongs to Mesoneuraster' according to Goeppert 1866
- 'Mesonevron belongs to Plantae'
- 'Mesonevron lygioides belongs to Mesonevron' according to Unger 1856
- 'Mesophyllum austriacum belongs to Mesophyllum' according to Lemoine 1930
- 'Mesopitys belongs to Araucariaceae'
- 'Mesosigillaria belongs to Sigillariaceae'
- 'Mesosingeria belongs to Pteridophyta'
- 'Mesosingeria coriacea belongs to Mesosingeria' according to Archangelsky 1963
- 'Mesostrobus belongs to Lycopodophyta'
- 'Mesostrobus scottii belongs to Mesostrobus' according to Watson 1909
- 'Mesoxyloides belongs to Cordaitales'
- 'Mesoxyloides platypodium belongs to Mesoxyloides' according to Maslen 1930
- 'Mesoxylon belongs to Cordaitales'
- 'Mesoxylon sutcliffi belongs to Mesoxylon' according to Scott 1910
- 'Mesoxylopsis belongs to Cordaitales'
- 'Mesoxylopsis arberae belongs to Mesoxylopsis' according to Scott 1919
- 'Mesuoxylon belongs to Plantae'
- 'Mesuoxylon arcotense belongs to Mesuoxylon' according to Lakhanpal and Awasthi 1964
- 'Metacaenoxylon belongs to Plantae'
- 'Metacaenoxylon carpentieri belongs to Metacaenoxylon' according to Zalessky 1935
- 'Metacalamostachys belongs to Calamitaceae'
- 'Metacalamostachys palaeacea belongs to Metacalamostachys' according to Stur 1927
- 'Metacedroxylon belongs to Coniferophyta'
- 'Metacedroxylon araucarioides belongs to Metacedroxylon' according to Holden 1913
- 'Metaclepsydropsis belongs to Coenopteridales'
- 'Metaclepsydropsis duplex belongs to Metaclepsydropsis' according to Williamson 1907
- 'Metacordaites belongs to Cordaitales'
- 'Metacordaites rigolloti belongs to Metacordaites' according to Renault 1896
- 'Metacupressinoxylon belongs to Cupressaceae'
- 'Metadineuron belongs to Zygopteridaceae'
- 'Metasolenopora rothpletzi belongs to Metasolenopora' according to Yabe 1912
- 'Metrosiderophyllites is a nomen nudum'
- 'Metzgeriites belongs to Jungermanniales'
- 'Meyenites belongs to Plantae'
- 'Meyenites aequimontanus belongs to Meyenites' according to Unger 1842
- 'Meyerella belongs to Plantae'
- 'Meyerella ramosa belongs to Meyerella' according to Korde 1950
- 'Miadesmia belongs to Lycopodophyta'
- 'Miadesmia membranacea belongs to Miadesmia' according to Bertrand 1895
- 'Micheevia belongs to Lycopodophyta'
- 'Micheevia uralica belongs to Micheevia' according to Zalessky 1930
- 'Michelilloa belongs to Cycadales'
- 'Michelilloa waltoni belongs to Michelilloa' according to Archangelsky and Brett 1963
- 'Miconiiphyllum belongs to Dicotyledonae'
- 'Miconiiphyllum australe belongs to Miconiiphyllum' according to Dusen 1908
- 'Micracanthodinium belongs to Plantae'
- 'Micracanthodinium bacilliferum belongs to Micracanthodinium' according to Schiller 1937
- 'Micrantholithus flos belongs to Micrantholithus' according to G. Deflandre 1950
- 'Micrhystridium belongs to Acritarcha'
- 'Micrhystridium cometes belongs to Micrhystridium' according to Valensi 1949
- 'Micrhystridium cometes is recombined as Comasphaeridium cometes' according to Staplin et al. 1965
- 'Micrhystridium inconspicuum belongs to Micrhystridium' according to Deflandre 1937
- 'Micrhystridium setasessitante belongs to Micrhystridium' according to Jansonius 1962
- 'Micrhystridium setasessitante is recombined as Filisphaeridium setasessitante' according to Staplin et al. 1965
- 'Micrhystridium stimuliferum belongs to Micrhystridium' according to Deflandre 1838
- 'Micrhystridium stimuliferum is recombined as Solisphaeridium stimuliferum' according to Staplin et al. 1965
- 'Microchara belongs to Charophyta'
- 'Microchara hystrix belongs to Microchara' according to Grambast 1959
- 'Microcheiris belongs to Caytoniales'
- 'Microcheiris enigma belongs to Microcheiris' according to Harris 1935
- 'Microchorton belongs to Plantae'
- 'Microchorton claviger belongs to Microchorton' according to Reis 1923
- 'Micrococcites belongs to Schizomycetes'
- 'Micrococcites lepidophagus belongs to Micrococcites' according to Renault 1898
- 'Micrococcus belongs to Bacteria'
- 'Micrococcus guignardi belongs to Micrococcus' according to Renault 1895
- 'Microcodium belongs to Plantae'
- 'Microcodium elegans belongs to Microcodium' according to Gluck 1912
- 'Microconcentrica belongs to Acritarcha'
- 'Microconcentrica atava belongs to Microconcentrica' according to Naumova 1960
- 'Microdictyon belongs to Pteridophyta'
- 'Microdictyon rutenicum belongs to Microdictyon' according to Saporta 1872
- 'Microdinium belongs to Dinophyceae'
- 'Microdiptera belongs to Lythraceae'
- 'Microdiptera parva belongs to Microdiptera' according to Chandler 1957
- 'Microlepidium belongs to Coniferales'
- 'Microlepidium striatulum belongs to Microlepidium' according to Velenovsky 1889
- 'Micromarsupium anceps belongs to Micromarsupium' according to Deflandre 1934
- 'Micropeltaceae belongs to Ascomycota'
- 'Microphycus belongs to Problematica'
- 'Microphycus catenatus belongs to Microphycus' according to Matthew 1889
- 'Microphyllopteris pectinata belongs to Microphyllopteris' according to Hector 1917
- 'Micropodium belongs to Leguminosae'
- 'Micropodium oligospermum belongs to Micropodium' according to Saporta 1861
- 'Microrhabdulinus belongs to Microrhabdulaceae'
- 'Microrhabdulinus ambiguus belongs to Microrhabdulinus' according to Deflandre 1963
- 'Microrhabduloidus belongs to Microrhabdulaceae'
- 'Microrhabdulus rugosus belongs to Microrhabdulus' according to Bouche 1962
- 'Microrhabdulus rugosus is recombined as Microrhabduloidus rugosus' according to Deflandre 1963
- 'Microrrhagion belongs to Monocotyledonae'
- 'Microrrhagion liversidgei belongs to Microrrhagion' according to Ettingshausen 1883
- 'Microrugosina is a nomen nudum'
- 'Microspermopteris belongs to Pteridospermophyta'
- 'Microspermopteris aphyllum belongs to Microspermopteris' according to Baxter 1949
- 'Microspermum belongs to Plantae'
- 'Microspermum samaroides belongs to Microspermum' according to Carpenter 1914
- 'Microstromium belongs to Plantae'
- 'Microtaenia belongs to Polypodiaceae'
- 'Microtaenia variabilis belongs to Microtaenia' according to Knowlton 1918
- 'Microtesta belongs to Plantae'
- 'Microtesta triassica belongs to Microtesta' according to Chapman 1927
- 'Microthallites belongs to Microthyriaceae'
- 'Microthallites latosus belongs to Microthallites' according to Dilcher 1965
- 'Microthyriaceae belongs to Ascomycota'
- 'Microthyriacites belongs to Microthyriaceae'
- 'Microthyriacites fimbriatus belongs to Microthyriacites' according to Cookson 1947
- 'Microthyrites belongs to Fungi'
- 'Microthyrites disodilis belongs to Microthyrites' according to Pampaloni 1902
- 'Microtinomiscium belongs to Menispermaceae'
- 'Microtinomiscium foveolatum belongs to Microtinomiscium' according to Reid and Chandler 1933
- 'Microweedia belongs to Plantae'
- 'Microweedia incrustans belongs to Microweedia' according to Toots 1952
- 'Microzygia belongs to Coenopteridales'
- 'Microzygia lacunosa belongs to Microzygia' according to Read 1936
- 'Mildraediodendron belongs to Plantae'
- 'Mildraediodendron excelsum belongs to Mildraediodendron' according to Harms 1920
- 'Milleria belongs to Aneurophytales'
- 'Milleria thomsonii belongs to Milleria' according to Lang 1926
- 'Mimosites belongs to Leguminosae'
- 'Mimosocarpum belongs to Mimosaceae'
- 'Minetaxites belongs to Podocarpaceae'
- 'Minjaria belongs to Problematica'
- 'Minjaria uralica belongs to Minjaria' according to Krylov 1963
- 'Minsterocarpum belongs to Lythraceae'
- 'Minsterocarpum alatum belongs to Minsterocarpum' according to Reid and Chandler 1933
- 'Mintopteris belongs to Schizaeaceae'
- 'Mintopteris hirsuta belongs to Mintopteris' according to Radforth and Walton 1960
- 'Minusia belongs to Plantae'
- 'Minusia antiqua belongs to Minusia' according to Chirkova-Zalesskaia 1956
- 'Miquelites belongs to Plantae'
- 'Miquelites elegans belongs to Miquelites' according to Goeppert 1854
- 'Mirbellites belongs to Plantae'
- 'Mirbellites lesbius belongs to Mirbellites' according to Unger 1845
- 'Mitcheldeania belongs to Problematica'
- 'Mitcheldeania nicholsoni belongs to Mitcheldeania' according to Wethered 1886
- 'Mitropicea is a nomen nudum'
- 'Mitrospermum belongs to Cordaitales'
- 'Mitrospermum compressum belongs to Mitrospermum' according to Williamson 1910
- 'Mitscherlichia belongs to Problematica'
- 'Mitscherlichia chinensis belongs to Mitscherlichia' according to Lorenz 1904
- 'Mittagia belongs to Plantae'
- 'Mittagia seminiformis belongs to Mittagia' according to Lignier 1913
- 'Mixoneura belongs to Pteridophyta'
- 'Mizziella belongs to Codiaceae'
- 'Mizziella canaliculosa belongs to Mizziella' according to Maslov 1956
- 'Mniaceae belongs to Bryophyta'
- 'Moellerina belongs to Charophyta'
- 'Moellerina greenei belongs to Moellerina' according to Ulrich 1886
- 'Mohgaostrobus belongs to Coniferales'
- 'Mohgaostrobus sahnii belongs to Mohgaostrobus' according to Prakash 1962
- 'Mohlites belongs to Plantae'
- 'Mohlites parenchymatosus belongs to Mohlites' according to Unger 1839
- 'Mointina belongs to Plantae'
- 'Mointina quadripartia belongs to Mointina' according to Senkevich 1961
- 'Mokrawia belongs to Filicinae'
- 'Mokrawia alberti belongs to Mokrawia' according to Knopp 1933
- 'Moltenia belongs to Bennettitales'
- 'Moltenia dentata belongs to Moltenia' according to DuToit 1927
- 'Monanthesia belongs to Bennettitales'
- 'Monemites belongs to Plantae'
- 'Monemites codioides belongs to Monemites' according to Massalongo 1850
- 'Monemites sphacelarioides is recombined as Ceramites sphacelarioides' according to Massalongo 1859
- 'Monemites sphacelarioides belongs to Monemites' according to Massalongo 1850
- 'Monheimia belongs to Pteridophyta'
- 'Monheimia polypodioides belongs to Monheimia' according to Debey and Ettingshausen 1859
- 'Monilites belongs to Fungi'
- 'Monilites albida belongs to Monilites' according to Pampaloni 1902
- 'Monimiopsis belongs to Monimiaceae'
- 'Monimiopsis amboraefolia belongs to Monimiopsis' according to Saporta 1868
- 'Monocarpellites belongs to Angiospermae'
- 'Monocarpellites whitfieldii belongs to Monocarpellites' according to Perkins 1904
- 'Monocarpia belongs to Plantae'
- 'Monocarpia posthumi belongs to Monocarpia' according to Jongmans and Gothan 1935
- 'Monocerocarpus belongs to Plantae'
- 'Monocerocarpus miocaenicus belongs to Monocerocarpus' according to Raciborski 1909
- 'Monocotylophyllum belongs to Monocotyledonae'
- 'Monodorospermum belongs to Plantae'
- 'Monodorospermum bangkanum belongs to Monodorospermum' according to Warburg 1897
- 'Monophyllites belongs to Plantae'
- 'Monopleurophyllum belongs to Aceraceae'
- 'Monopleurophyllum hungaricum belongs to Monopleurophyllum' according to Andreanszky 1959
- 'Monoscalitheca belongs to Coenopteridales'
- 'Monoscalitheca fasciculata belongs to Monoscalitheca' according to Abbott 1961
- 'Monosphenophyllum belongs to Plantae'
- 'Monosphenophyllum dawsoni belongs to Monosphenophyllum' according to Williamson 1909
- 'Monostychia belongs to Plantae'
- 'Monostychia lapidosa belongs to Monostychia' according to Vologdin 1962
- 'Montiella belongs to Dasycladaceae'
- 'Montiella munieri belongs to Montiella' according to Morellet and Morellet 1922
- 'Montsechia belongs to Angiospermae'
- 'Montsechites belongs to Angiospermae'
- 'Montsechites ferreri belongs to Montsechites' according to Teixeira 1954
- 'Morania belongs to Nostocaceae'
- 'Morania is replaced by Moranocladus' according to Seward and Sahni 1926
- 'Morania confluens belongs to Morania' according to Walcott 1919
- 'Moranocladus belongs to Coniferophyta'
- 'Moreauia belongs to Plantae'
- 'Moreauia araucarina belongs to Moreauia' according to Pomel 1849
- 'Morelletpora belongs to Dasycladaceae'
- 'Morelletpora nammalensis belongs to Morelletpora' according to Varma 1950
- 'Moreophyllum belongs to Moraceae'
- 'Moresnetia belongs to Plantae'
- 'Moresnetia zalesskyi belongs to Moresnetia' according to Stockmans 1946
- 'Moriconia belongs to Pteridophyta'
- 'Moriconia cyclotoxon belongs to Moriconia' according to Debey and Ettingshausen 1859
- 'Morindidium belongs to Plantae'
- 'Morindidium brongniarti belongs to Morindidium' according to Stiehler 1861
- 'Morinium is a nomen nudum'
- 'Moroidea belongs to Moraceae'
- 'Moroidea boveyana belongs to Moroidea' according to Chandler 1957
- 'Morosporium belongs to Fungi'
- 'Morosporium lignitum belongs to Morosporium' according to Renault and Roche 1898
- 'Morrisia belongs to Cycadophyta'
- 'Mucedinaceae belongs to Fungi'
- 'Mucedites belongs to Fungi'
- 'Mucedites stercoraria belongs to Mucedites' according to Bertrand and Renault 1896
- 'Mucoraceae belongs to Fungi'
- 'Mucorites belongs to Phycomycetes'
- 'Mucorites combrensis belongs to Mucorites' according to Renault 1898
- 'Mucorodium belongs to Mucoraceae'
- 'Mucorodium paleomycoides belongs to Mucorodium' according to Zalessky 1915
- 'Mucunites belongs to Plantae'
- 'Mucunites grepini belongs to Mucunites' according to Heer 1859
- 'Mudecinaceae belongs to Hyphomycetes'
- 'Muensteria belongs to Plantae'
- 'Muensteria flagellaria belongs to Muensteria' according to Sternberg 1833
- 'Muensteria flagellaria is recombined as Eumuensteria flagellaria' according to Rothpletz 1896
- 'Muensteria spiralis belongs to Muensteria' according to Massalongo 1857
- 'Muensteria vermicularis belongs to Muensteria' according to Sternberg 1833
- 'Muiriella belongs to Peridiniaceae'
- 'Muiriella plioplax belongs to Muiriella' according to Churchill and Sarjeant 1962
- 'Multiplicisphaeridium belongs to Dinophyceae'
- 'Multiplicisphaeridium ramispinosum belongs to Multiplicisphaeridium' according to Staplin 1961
- 'Mundapteris belongs to Pteridophyta'
- 'Mundapteris delicata belongs to Mundapteris' according to Teixeira 1948
- 'Munieria baconica belongs to Munieria' according to Hantken 1883
- 'Munierina belongs to Ranunculaceae'
- 'Munierina oecenica belongs to Munierina' according to Viguier 1907
- 'Murandavia belongs to Plantae'
- 'Murandavia amurica belongs to Murandavia' according to Vologdin 1965
- 'Murchisonites belongs to Plantae'
- 'Murchisonites forbesii belongs to Murchisonites' according to Goeppert 1859
- 'Murinicarpus belongs to Plantae'
- 'Musaeites belongs to Plantae'
- 'Musaeites primaevus belongs to Musaeites' according to Presl 1838
- 'Musciphyton belongs to Plantae'
- 'Musciphyton zakroczymense belongs to Musciphyton' according to Greguss 1959
- 'Muscites belongs to Bryophyta'
- 'Muscites tournalii belongs to Muscites' according to Brongniart 1828
- 'Muscocarpum belongs to Plantae'
- 'Musocarpum is replaced by Muscocarpum' according to Grand'Eury 1877
- 'Musocarpum prismaticum belongs to Musocarpum' according to Brongniart 1828
- 'Musocarpum prismaticum is recombined as Muscocarpum prismaticum' according to Grand'Eury 1877
- 'Musocaulon belongs to Musaceae'
- 'Musocaulon indicum belongs to Musocaulon' according to Jain 1964
- 'Musophyllum belongs to Musaceae'
- 'Musophyllum truncatum belongs to Musophyllum' according to Goeppert 1854
- 'Musoxylon belongs to Scitamineae'
- 'Musoxylon antracotherii belongs to Musoxylon' according to Massalongo 1893
- 'Mycocarpon belongs to Plantae'
- 'Mycocarpon pachyderma belongs to Mycocarpon' according to Williamson 1955
- 'Mycogemma belongs to Ascomycota'
- 'Mycogemma saccharomycoides belongs to Mycogemma' according to Zalessky 1915
- 'Mycorhizonium belongs to Fungi'
- 'Myelocalamites belongs to Calamitaceae'
- 'Myelophycus belongs to Plantae'
- 'Myelophycus curvatum belongs to Myelophycus' according to Ulrich 1904
- 'Myelopithys belongs to Medullosaceae'
- 'Myelopithys medullosa belongs to Myelopithys' according to Corda 1845
- 'Myelopteris belongs to Medullosaceae'
- 'Myelopteris radiata belongs to Myelopteris' according to Renault 1874
- 'Myoporiphyllum belongs to Boraginaceae'
- 'Myoporiphyllum angustum belongs to Myoporiphyllum' according to Ettingshausen 1891
- 'Myrciophyllum ambiguaeoides belongs to Myrciophyllum' according to Engelhardt 1891
- 'Myriaspermum is a nomen nudum'
- 'Myricaephyllum belongs to Myricaceae'
- 'Myricanthium belongs to Myricaceae'
- 'Myricanthium amentaceum belongs to Myricanthium' according to Velenovsky 1889
- 'Myriciphyllum belongs to Myricaceae'
- 'Myriciphyllum oligocenicum belongs to Myriciphyllum' according to Conwentz 1886
- 'Myricophyllum belongs to Proteaceae'
- 'Myricophyllum gracile belongs to Myricophyllum' according to Saporta 1862
- 'Myricoxylon belongs to Myricaceae'
- 'Myricoxylon hungaricum belongs to Myricoxylon' according to Mueller-Stoll and Maedel 1962
- 'Myriophyllites belongs to Plantae'
- 'Myriophyllites gracilis belongs to Myriophyllites' according to Artis 1825
- 'Myriophylloides belongs to Calamitales'
- 'Myriophylloides williamsoni belongs to Myriophylloides' according to Hick and Cash 1881
- 'Myriotheca belongs to Pteridophyta'
- 'Myriotheca desaillyi belongs to Myriotheca' according to Zeiller 1883
- 'Myristicophyllum belongs to Myristicaceae'
- 'Myristicophyllum minus belongs to Myristicophyllum' according to Geyler 1887
- 'Myristicoxylon belongs to Plantae'
- 'Myristicoxylon princeps belongs to Myristicoxylon' according to Boureau 1950
- 'Myrmekioporella belongs to Plantae'
- 'Myrmekioporella mosana belongs to Myrmekioporella' according to Pia 1925
- 'Myrsinites belongs to Myrsinaceae'
- 'Myrsinites antiquus belongs to Myrsinites' according to Ettingshausen 1868
- 'Myrsinophyllum belongs to Myrsinaceae'
- 'Myrsinophyllum varians belongs to Myrsinophyllum' according to Velenovsky 1889
- 'Myrsinopsis belongs to Myrsinaceae'
- 'Myrsinopsis succinea belongs to Myrsinopsis' according to Conwentz 1886
- 'Myrthomyophyton is replaced by Myrtomiophyton' according to Massalongo 1858
- 'Myrthomyophyton stephanophorus belongs to Myrthomyophyton' according to Massalongo 1857
- 'Myrthomyophyton stephanophorus is recombined as Myrtomiophyton stephanophorus' according to Massalongo 1858
- 'Myrtifolium belongs to Myrtaceae'
- 'Myrtifolium lingua belongs to Myrtifolium' according to Unger 1864
- 'Myrtiphyllum belongs to Myrtaceae'
- 'Myrtomiophyton belongs to Myrtaceae'
- 'Myrtonium belongs to Myrtaceae'
- 'Myrtonium obtusifolium belongs to Myrtonium' according to Ettingshausen 1886
- 'Myrtophyllum belongs to Plantae'
- 'Myrtophyllum geinitzi belongs to Myrtophyllum' according to Heer 1869
- 'Myrtospermum belongs to Myrtaceae'
- 'Myrtospermum boveyanum belongs to Myrtospermum' according to Chandler 1957
- 'Myrtoxylon belongs to Myrtaceae'
- 'Myrtoxylon secretans belongs to Myrtoxylon' according to Boureau 1953
- 'Myxomycetes is replaced by Myxomycites' according to Meschinelli 1898
- 'Myxomycetes mangini belongs to Myxomycetes' according to Renault 1895
- 'Myxomycetes mangini is recombined as Myxomycites mangini' according to Meschinelli 1898
- 'Myxomycites belongs to Problematica'
- 'Nagatostrobus belongs to Plantae'
- 'Nagatostrobus naitoi belongs to Nagatostrobus' according to Kon'no 1962
- 'Nageiopsis belongs to Cycadophyta'
- 'Nageiopsis longifolia belongs to Nageiopsis' according to Fontaine 1889
- 'Naiadita belongs to Plantae'
- 'Naiadita lanceolata belongs to Naiadita' according to Buckman 1850
- 'Najadonium belongs to Najadaceae'
- 'Najadonium longifolium belongs to Najadonium' according to Ettingshausen 1872
- 'Najadopsis belongs to Najadaceae'
- 'Najadopsis dichotoma belongs to Najadopsis' according to Heer 1855
- 'Naktongia belongs to Pteridophyta'
- 'Naktongia yabei belongs to Naktongia' according to Oishi 1939
- 'Nannoceratopsiella belongs to Dinophyceae'
- 'Nannoceratopsiella permiana belongs to Nannoceratopsiella' according to Tasch 1963
- 'Nannoceratopsis belongs to Dinophyceae'
- 'Nannoconus belongs to Coccolithophorales'
- 'Nanopora belongs to Dasycladaceae'
- 'Nanopora anglica belongs to Nanopora' according to Wood 1964
- 'Nathorstia is replaced by Leckenbya' according to Seward 1894
- 'Nathorstia angustifolia belongs to Nathorstia' according to Heer 1880
- 'Nathorstia valdensis belongs to Nathorstia' according to Seward 1894
- 'Nathorstia valdensis is recombined as Leckenbya valdensis' according to Seward 1894
- 'Nathorstiana belongs to Plantae'
- 'Nathorstiana arborea belongs to Nathorstiana' according to Richter 1909
- 'Nathorstianella belongs to Isoetaceae'
- 'Naucleoxylon belongs to Plantae'
- 'Naucleoxylon spectabile belongs to Naucleoxylon' according to Crie 1888
- 'Navajoia is a nomen nudum'
- 'Nechalea is a nomen nudum'
- 'Nectandrophyllum belongs to Lauraceae'
- 'Negundoides belongs to Aceraceae'
- 'Negundoides acutifolia belongs to Negundoides' according to Lesquereux 1868
- 'Nellostrobus belongs to Plantae'
- 'Nellostrobus quadraticus belongs to Nellostrobus' according to Semaka 1958
- 'Nelsoniella belongs to Dinophyceae'
- 'Nelumbites belongs to Nymphaeaceae'
- 'Nemaclada belongs to Fungi'
- 'Nemaclada alternata belongs to Nemaclada' according to Smith 1896
- 'Nemalionites is a nomen nudum'
- 'Nemaphycus belongs to Problematica'
- 'Nemaphycus antiquus belongs to Nemaphycus' according to Korde 1954
- 'Nemaplana belongs to Fungi'
- 'Nemaplana filiforme belongs to Nemaplana' according to Smith 1896
- 'Nematocaulis belongs to Coniferales'
- 'Nematocaulis lafonti belongs to Nematocaulis' according to Corsin 1945
- 'Nematofolium belongs to Coniferales'
- 'Nematofolium lafonti belongs to Nematofolium' according to Corsin 1945
- 'Nematoglobus belongs to Coniferales'
- 'Nematoglobus lafonti belongs to Nematoglobus' according to Corsin 1945
- 'Nematolites belongs to Plantae'
- 'Nematolites edwardsii belongs to Nematolites' according to Keeping 1882
- 'Nematopetiolus belongs to Coniferales'
- 'Nematopetiolus lafonti belongs to Nematopetiolus' according to Corsin 1945
- 'Nematophora belongs to Plantae'
- 'Nematophora fascigera belongs to Nematophora' according to Gruess 1924
- 'Nematophycus belongs to Problematica'
- 'Nematophycus logani belongs to Nematophycus' according to Dawson 1872
- 'Nematophyllites belongs to Calamitaceae'
- 'Nematophyllum is replaced by Nematophyllites' according to Miller 1892
- 'Nematophyllum angustum belongs to Nematophyllum' according to Fontaine and White 1880
- 'Nematophyllum angustum is recombined as Nematophyllites angustus' according to Miller 1892
- 'Nematophyton belongs to Plantae'
- 'Nematoplexus belongs to Plantae'
- 'Nematoplexus rhyniensis belongs to Nematoplexus' according to Lyon 1962
- 'Nematorites belongs to Plantae'
- 'Nematorites oscillatoriaeformis belongs to Nematorites' according to Gruess 1928
- 'Nematosphaeropsis balcombiana belongs to Nematosphaeropsis' according to Deflandre and Cookson 1955
- 'Nematothallus belongs to Plantae'
- 'Nematothallus pseudovasculosa belongs to Nematothallus' according to Lang 1937
- 'Nematoxylon belongs to Coniferales'
- 'Nematoxylon crassum belongs to Nematoxylon' according to Dawson 1863
- 'Neoanchicodium belongs to Codiaceae'
- 'Neoanchicodium catenoides belongs to Neoanchicodium' according to Endo 1954
- 'Neocalamites belongs to Calamitaceae'
- 'Neocalamites hoerensis belongs to Neocalamites' according to Schimper 1908
- 'Neocalamostachys pedunculatus belongs to Neocalamostachys' according to Bureau 1964
- 'Neocalliergon belongs to Bryophyta'
- 'Neocalliergon integrifolium belongs to Neocalliergon' according to Williams 1930
- 'Neochondrites is a nomen nudum'
- 'Neodendron belongs to Plantae'
- 'Neogyroporella belongs to Dasycladaceae'
- 'Neogyroporella elegans belongs to Neogyroporella' according to Yabe and Toyama 1949
- 'Neokoretrophyllites belongs to Equisetales'
- 'Neokoretrophyllites comptus belongs to Neokoretrophyllites' according to Radchenko 1956
- 'Neospongiostroma belongs to Plantae'
- 'Neospongiostroma tosensis belongs to Neospongiostroma' according to Endo 1961
- 'Neozamia belongs to Palmae'
- 'Neozamites belongs to Plantae'
- 'Neozamites verchojanensis belongs to Neozamites' according to Vakhrameev 1962
- 'Nephelites belongs to Fagaceae'
- 'Nephelites equidentata belongs to Nephelites' according to Deane 1902
- 'Nephelostroma belongs to Plantae'
- 'Nephelostroma lecomptei belongs to Nephelostroma' according to Dangeard and Dore 1957
- 'Nephropsis belongs to Ginkgophyta'
- 'Nephropteris belongs to Neuropteridae'
- 'Nereograpsus belongs to Problematica'
- 'Neriopteris belongs to Pteridophyta'
- 'Neriopteris lanceolata belongs to Neriopteris' according to Newberry 1873
- 'Neritinium belongs to Apocynaceae'
- 'Neritinium dubium belongs to Neritinium' according to Unger 1850
- 'Netrelytron belongs to Problematica'
- 'Netrelytron stegastrum belongs to Netrelytron' according to Sarjeant 1961
- 'Neurocallipteris belongs to Plantae'
- 'Neurocallipteris gleichenioides belongs to Neurocallipteris' according to Stur 1895
- 'Neurocardiopteris belongs to Neuropteridae'
- 'Neurocardiopteris broilii belongs to Neurocardiopteris' according to Lutz 1933
- 'Neurodontopteris belongs to Neuropteridae'
- 'Neurogangamopteris belongs to Neuropteridae'
- 'Neurogangamopteris cardiopteroides belongs to Neurogangamopteris' according to Schmalhausen 1918
- 'Neurophyllum belongs to Pteridophyta'
- 'Neuropteridium belongs to Neuropteridae'
- 'Neuropteridium grandifolium belongs to Neuropteridium' according to Schimper 1879
- 'Neuropteris albertsii belongs to Neuropteris' according to Dunker 1846
- 'Neuropteris albertsii is recombined as Cladophlebis albertsii' according to Brongniart 1849
- 'Neuropteris auriculata is recombined as Neurodontopteris auriculata' according to Potonie 1893
- 'Neuropteris auriculata belongs to Neuropteris' according to Brongniart 1830
- 'Neuropteris conferta belongs to Neuropteris' according to Sternberg 1833
- 'Neuropteris conferta is recombined as Callipteris conferta' according to Brongniart 1849
- 'Neuropteris dawsoni belongs to Neuropteris' according to Hartt 1868
- 'Neuropteris dawsoni is recombined as Megalopteris dawsoni' according to Andrews 1875
- 'Neuropteris gigantea belongs to Neuropteris' according to Sternberg 1825
- 'Neuropteris gigantea is recombined as Paripteris gigantea' according to Gothan 1941
- 'Neuropteris heterophylla belongs to Neuropteris' according to Brongniart 1825
- 'Neuropteris heterophylla is recombined as Imparipteris heterophylla' according to Gothan 1941
- 'Neuropteris moorii belongs to Neuropteris' according to Lesquereux 1858
- 'Neuropteris moorii is recombined as Lescuropteris moorii' according to Schimper 1869
- 'Neuropteris schlehani belongs to Neuropteris' according to Stur 1877
- 'Neuropteris schlehani is recombined as Neuralethopteris schlehani' according to Cremer 1893
- 'Neuralethopteris schlehanii is a misspelling of Neuralethopteris schlehani'
- 'Neuropterocarpus belongs to Neuropteridae'
- 'Neuropterocarpus kidstoni belongs to Neuropterocarpus' according to Arber 1917
- 'Neuropterocarpus ramosus belongs to Neuropterocarpus' according to Stockmans and Williere 1956
- 'Neuropterocarpus ramosus is recombined as Dichotospermum ramosum' according to Stockmans and Williere 1961
- 'Neuropteromedullosa belongs to Plantae'
- 'Neuroraphe belongs to Plantae'
- 'Neuroraphe obovatum belongs to Neuroraphe' according to Reid and Chandler 1933
- 'Neurospermum belongs to Neuropteridae'
- 'Neurospermum kidstoni belongs to Neurospermum' according to Arber 1914
- 'Neurosphenopteris belongs to Sphenopteridae'
- 'Neurosporangium belongs to Plantae'
- 'Neurosporangium foliaceum belongs to Neurosporangium' according to Debey and Ettingshausen 1859
- 'Nevrospermum belongs to Neuropteridae'
- 'Nevrospermum heterophyllae belongs to Nevrospermum' according to Bertrand 1913
- 'Newberryana belongs to Filicales'
- 'Newlandia belongs to Problematica'
- 'Newlandia frondosa belongs to Newlandia' according to Walcott 1914
- 'Niayssia belongs to Psilophytophyta'
- 'Niayssia plumata belongs to Niayssia' according to Zalessky 1937
- 'Niazonaria belongs to Plantae'
- 'Niazonaria stellata belongs to Niazonaria' according to Radchenko 1933
- 'Nicolia belongs to Plantae'
- 'Nicolia aegyptiaca belongs to Nicolia' according to Unger 1842
- 'Nidulites is a subjective synonym of Mastopora'
- 'Nidulites favus belongs to Nidulites' according to Salter 1851
- 'Nikania belongs to Cycadales'
- 'Nikania pectinata belongs to Nikania' according to Prinada 1956
- 'Nilsonia is corrected as Nilssonia and belongs to Cycadophyta'
- 'Nilssonia brevis belongs to Nilssonia' according to Brongniart 1825
- 'Nilssonia contigua belongs to Nilssonia' according to Muenster 1844
- 'Nilssonia contigua is replaced by Taeniophyllum muensteri' according to Pomel 1849
- 'Nilssoniopteris belongs to Cycadophyta'
- 'Nilssoniopteris tenuinervis belongs to Nilssoniopteris' according to Nathorst 1909
- 'Nipadites belongs to Palmae'
- 'Nipaniophyllum belongs to Plantae'
- 'Nipaniophyllum raoi belongs to Nipaniophyllum' according to Sahni 1948
- 'Nipanioruha belongs to Coniferales'
- 'Nipanioruha granthia belongs to Nipanioruha' according to Rao 1947
- 'Nipaniostrobus belongs to Podocarpaceae'
- 'Nipaniostrobus sahnii belongs to Nipaniostrobus' according to Rao 1943
- 'Nipanioxylon belongs to Ginkgoopsida'
- 'Nipanioxylon guptai belongs to Nipanioxylon' according to Srivastava 1944
- 'Niponophyllum belongs to Gymnospermae'
- 'Niponophyllum cordaitiforme belongs to Niponophyllum' according to Stopes and Fujii 1910
- 'Nipponophycus belongs to Rhodophyceae'
- 'Nipponophycus ramosus belongs to Nipponophycus' according to Yabe and Toyama 1928
- 'Nipponophysoporella belongs to Plantae'
- 'Nipponophysoporella elegans belongs to Nipponophysoporella' according to Endo 1959
- 'Nitellites belongs to Charophyta'
- 'Nitellites sahnii belongs to Nitellites' according to Horn af Rantzien 1957
- 'Nitophyllites belongs to Plantae'
- 'Nitophyllites zaisanica belongs to Nitophyllites' according to Ilyinskaia 1963
- 'Nodophycus belongs to Plantae'
- 'Nodophycus thallyformis belongs to Nodophycus' according to Herzer 1901
- 'Nodosochara belongs to Charophyta'
- 'Nodosoclavator belongs to Charophyta'
- 'Nodosoclavator nodosus belongs to Nodosoclavator' according to Peck 1961
- 'Nodularites belongs to Schizophyta'
- 'Nodularites cylindricus belongs to Nodularites' according to Maslov 1956
- 'Noeggerathia belongs to Pteridophyta'
- 'Noeggerathia flabellata belongs to Noeggerathia' according to Lindley and Hutton 1832
- 'Noeggerathia flabellata is recombined as Psygmophyllum flabellatum' according to Schimper 1870
- 'Noeggerathia foliosa is recombined as Phyllocladites foliosa' according to Visiani 1858
- 'Noeggerathia foliosa belongs to Noeggerathia' according to Sternberg 1822
- 'Noeggerathia goepperti belongs to Noeggerathia' according to Eichwald 1860
- 'Noeggerathia goepperti is recombined as Dolerophyllum goepperti' according to Saporta 1878
- 'Noeggerathia palmaeformis is recombined as Pseudocordaites palmaeformis' according to Fritsch 1900
- 'Noeggerathia palmaeformis belongs to Noeggerathia' according to Goeppert 1852
- 'Noeggerathia palmaeformis is a subjective synonym of Poacordaites latifolius'
- 'Noeggerathia vogesiaca belongs to Noeggerathia' according to Bronn 1858
- 'Noeggerathia vogesiaca is a subjective synonym of Macropterygium bronnii'
- 'Noeggerathiaestrobus belongs to Plantae'
- 'Noeggerathiaestrobus bohemicus belongs to Noeggerathiaestrobus' according to Feistmantel 1871
- 'Noeggerathiostrobus belongs to Plantae'
- 'Noeggerathiostrobus bohemicus belongs to Noeggerathiostrobus' according to Nemejc 1928
- 'Noeopteris belongs to Pteridophyta'
- 'Noeopteris asymmetrica belongs to Noeopteris' according to Janssen 1940
- 'Nordenskioldia belongs to Tiliaceae'
- 'Noremia belongs to Chlorophyceae'
- 'Noremia major belongs to Noremia' according to Kedves 1962
- 'Norimbergia belongs to Schizaeaceae'
- 'Norimbergia braunii belongs to Norimbergia' according to Goeppert 1914
- 'Norinia belongs to Plantae'
- 'Norinia cucullata belongs to Norinia' according to Halle 1927
- 'Nostocaceae belongs to Cyanobacteria'
- 'Nostocites belongs to Plantae'
- 'Nostocites problematica belongs to Nostocites' according to Maslov 1929
- 'Nothia belongs to Lycopodophyta'
- 'Nothia aphylla belongs to Nothia' according to Lyon 1964
- 'Nothofagoxylon belongs to Nothofagaceae'
- 'Nothofagoxylon scalariforme belongs to Nothofagoxylon' according to Gothan 1908
- 'Nothopteris is a nomen nudum'
- 'Nothyocha belongs to Chrysophyceae'
- 'Nothyocha insolita belongs to Nothyocha' according to Deflandre 1949
- 'Notoschizaea belongs to Zygopteridaceae'
- 'Notoschizaea robusta belongs to Notoschizaea' according to Graham 1934
- 'Notothyrites belongs to Microthyriaceae'
- 'Notothyrites setiferus belongs to Notothyrites' according to Cookson 1947
- 'Novoguineoxylon belongs to Cycadophyta'
- 'Novoguineoxylon lacunosum belongs to Novoguineoxylon' according to Boureau and Jongmans 1955
- 'Nubecularites belongs to Plantae'
- 'Nubecularites polymorphus belongs to Nubecularites' according to Maslov 1937
- 'Nucicarpus piniformis belongs to Nucicarpus' according to Neuberg 1965
- 'Nudospermum belongs to Pteridospermophyta'
- 'Nuia belongs to Plantae'
- 'Nuia sibirica belongs to Nuia' according to Maslov 1954
- 'Nullipora ramosissima belongs to Nullipora' according to Reuss 1848
- 'Nullipora ramosissima is recombined as Sorithamnion ramosissimum' according to Heydrich 1900
- 'Nulliporites belongs to Plantae'
- 'Nulliporites hechingensis belongs to Nulliporites' according to Quenstedt 1864
- 'Nummulospermum belongs to Glossopteridaceae'
- 'Nummulospermum bowense belongs to Nummulospermum' according to Walkom 1921
- 'Nyctaginites belongs to Nyctaginaceae'
- 'Nyctaginites ellipticus belongs to Nyctaginites' according to Berry 1938
- 'Nyctomyces belongs to Fungi'
- 'Nyctomyces antediluvianus belongs to Nyctomyces' according to Unger 1841
- 'Nygmites belongs to Plantae'
- 'Nygmites solitarius belongs to Nygmites' according to Hagenow 1937
- 'Nymphaea arethusae belongs to Nymphaea' according to Brongniart 1822
- 'Nymphaea arethusae is recombined as Nymphaeites arethusae' according to Sternberg 1825
- 'Nymphaeites belongs to Nymphaeaceae'
- 'Nymphaeopsis belongs to Nymphaeaceae'
- 'Nymphaeopsis bachmanni belongs to Nymphaeopsis' according to Kraeusel 1939
- 'Nyssa obovata belongs to Nyssa' according to Weber 1851
- 'Nyssa obovata is recombined as Nyssites obovatus' according to Geyler 1887
- 'Nyssidium belongs to Araliaceae'
- 'Nyssidium ekmani belongs to Nyssidium' according to Heer 1870
- 'Nyssites belongs to Nyssaceae'
- 'Nyssoidea belongs to Nyssaceae'
- 'Nyssoxylon belongs to Nyssaceae'
- 'Nyssoxylon japonicum belongs to Nyssoxylon' according to Maedel 1959
- 'Nystroemia belongs to Pteridospermophyta'
- 'Nystroemia pectiniformis belongs to Nystroemia' according to Halle 1927
- 'Obtusochara belongs to Characeae'
- 'Obtusochara prima belongs to Obtusochara' according to Maedel 1953
- 'Ochrosella belongs to Apocynaceae'
- 'Ochrosella ovalis belongs to Ochrosella' according to Reid and Chandler 1933
- 'Ochrosoidea belongs to Apocynaceae'
- 'Ochrosoidea sheppeyensis belongs to Ochrosoidea' according to Reid and Chandler 1933
- 'Ochthodocaryon belongs to Angiospermae'
- 'Ochthodocaryon wilkinsonii belongs to Ochthodocaryon' according to Mueller 1877
- 'Ocoteoxylon belongs to Lauraceae'
- 'Ocoteoxylon ligurinum belongs to Ocoteoxylon' according to Schuster 1908
- 'Ocquieria belongs to Plantae'
- 'Ocquieria sessilis belongs to Ocquieria' according to Stockmans and Williere 1955
- 'Octaviona belongs to Thallophyta'
- 'Octotheca belongs to Marattiaceae'
- 'Octotheca bertrandi belongs to Octotheca' according to Guthoerl 1953
- 'Odontocaryoidea belongs to Menispermaceae'
- 'Odontocaryoidea nodulosa belongs to Odontocaryoidea' according to Scott 1954
- 'Odontocaryon belongs to Plantae'
- 'Odontocaryon macgregori belongs to Odontocaryon' according to Mueller 1873
- 'Odontochitina belongs to Dinophyceae'
- 'Odontochitinopsis belongs to Dinophyceae'
- 'Odontochitinopsis molesta belongs to Odontochitinopsis' according to Eisenack 1961
- 'Odontopteris brardi belongs to Odontopteris' according to Brongniart 1828
- 'Odontopteris brardi is recombined as Xenopteris brardi' according to Weiss 1870
- 'Odontopteris brardii belongs to Odontopteris' according to Brongniart 1825
- 'Odontopteris muensteri belongs to Odontopteris' according to Eichwald 1840
- 'Odontopteris muensteri is recombined as Reticulopteris muensteri' according to Gothan 1941
- 'Odontopteris neuropteroides belongs to Odontopteris' according to Roemer 1860
- 'Odontopteris neuropteroides is recombined as Pseudoodontopteris neuropteroides' according to Grand'Eury 1877
- 'Odontopteris obtusa belongs to Odontopteris' according to Brongniart 1828
- 'Odontopteris obtusa is recombined as Mixoneura obtusa' according to Weiss 1870
- 'Odontopteris obtusiloba belongs to Odontopteris' according to Naumann 1849
- 'Odontopteris obtusiloba is recombined as Aneimites obtusilobus' according to Ettingshausen 1865
- 'Odontopterocarpus belongs to Plantae'
- 'Odontopterocarpus oblongus belongs to Odontopterocarpus' according to Loubiere 1930
- 'Odontosorites belongs to Polypodiales'
- 'Odontosorites heerianus belongs to Odontosorites' according to Yokoyama 1944
- 'Oedogonites belongs to Plantae'
- 'Oidites belongs to Hyphomycetes'
- 'Oidites moniliformis belongs to Oidites' according to Menge and Goeppert 1892
- 'Oidospora belongs to Plantae'
- 'Oidospora anomala belongs to Oidospora' according to Williamson 1878
- 'Oldhamia antiqua belongs to Oldhamia' according to Forbes 1849
- 'Oleaecarpum belongs to Oleaceae'
- 'Oleaecarpum germanicum belongs to Oleaecarpum' according to Menzel 1913
- 'Oleariaphyllites is a nomen nudum'
- 'Oleinites belongs to Oleaceae'
- 'Oleiphyllum belongs to Oleaceae'
- 'Oleiphyllum boreale belongs to Oleiphyllum' according to Conwentz 1886
- 'Oleracites belongs to Oleaceae'
- 'Oleracites convolvuloides belongs to Oleracites' according to Saporta 1862
- 'Olfersites belongs to Dryopteridaceae'
- 'Oligocarpia belongs to Gleicheniaceae'
- 'Oligocarpia gutbieri belongs to Oligocarpia' according to Goeppert 1841
- 'Oligoporella pilosa belongs to Oligoporella' according to Pia 1912
- 'Ollaria belongs to Dasycladaceae'
- 'Ollaria cava belongs to Ollaria' according to Maslov 1955
- 'Omatia belongs to Acritarcha'
- 'Ommatoxylon belongs to Plantae'
- 'Ommatoxylon germari belongs to Ommatoxylon' according to Hartig 1848
- 'Omphalomela belongs to Plantae'
- 'Omphalomela scabra belongs to Omphalomela' according to Germar 1846
- 'Omphalophloios belongs to Lycopodophyta'
- 'Omphalophloios cyclostigma belongs to Omphalophloios' according to White 1898
- 'Onakawanus belongs to Ascomycota'
- 'Onakawanus varitas belongs to Onakawanus' according to Radforth 1958
- 'Oncobyrsella belongs to Cyanobacteria'
- 'Oncobyrsella coloradensis belongs to Oncobyrsella' according to Johnson 1937
- 'Oncodendron belongs to Lycopodophyta'
- 'Oncodendron mirabile belongs to Oncodendron' according to Eichwald 1860
- 'Oncopteris belongs to Plantae'
- 'Oncopteris nettwalli belongs to Oncopteris' according to Dormitzer 1853
- 'Oncylogonatum belongs to Equisetales'
- 'Onoana belongs to Icacinaceae'
- 'Onocleites belongs to Pteridophyta'
- 'Onocleites lanceolatus belongs to Onocleites' according to Jaeger 1827
- 'Ontheanthus belongs to Bennettitales'
- 'Ontheanthus polyandra belongs to Ontheanthus' according to Ganju 1944
- 'Ontheodendron belongs to Coniferales'
- 'Ontheodendron florini belongs to Ontheodendron' according to Sahni and Rao 1933
- 'Ontheodendron florini is recombined as Cycadophytites florini' according to Rao and Bose 1959
- 'Ontheostrobus belongs to Bennettitales'
- 'Ontheostrobus sessilis belongs to Ontheostrobus' according to Ganju 1944
- 'Onychiopsis belongs to Polypodiaceae'
- 'Onichiopsis is a misspelling of Onychiopsis'
- 'Onychiopsis elongata belongs to Onychiopsis' according to Geyler 1889
- 'Oochytrium belongs to Fungi'
- 'Oochytrium lepidodendri belongs to Oochytrium' according to Renault 1895
- 'Oodnadattia belongs to Dinophyceae'
- 'Ooidium belongs to Acritarcha'
- 'Ooidium rossicum belongs to Ooidium' according to Timofeev 1957
- 'Ootheca belongs to Pteridospermophyta'
- 'Ootheca nordenskioldii belongs to Ootheca' according to Nathorst 1914
- 'Opegraphites belongs to Plantae'
- 'Opegraphites striatopunctatus belongs to Opegraphites' according to Debey 1859
- 'Ophiobolus belongs to Acritarcha'
- 'Ophiobolus lapidaris belongs to Ophiobolus' according to Wetzel 1933
- 'Ophioglossites belongs to Pteridophyta'
- 'Ophioglossites eocena belongs to Ophioglossites' according to Massalongo 1850
- 'Ophioglossum granulatum belongs to Ophioglossum' according to Heer 1883
- 'Ophioglossum granulatum is recombined as Pityanthus granulatus' according to Seward 1919
- 'Ophioglossum hastatiforme belongs to Ophioglossum' according to Cockerell 1924
- 'Ophioglossum hastatiforme is recombined as Xantholithus hastatiformis' according to Cockerell 1926
- 'Orchidacites belongs to Orchidaceae'
- 'Orchidacites orchidioides belongs to Orchidacites' according to Straus 1954
- 'Oreodoxites belongs to Plantae'
- 'Oreodoxites belongs to Palmae'
- 'Oreodoxites martianus belongs to Oreodoxites' according to Goeppert 1864
- 'Oreodoxites plicatus belongs to Oreodoxites' according to Lesquereux 1883
- 'Orestovia belongs to Psilophytales'
- 'Orestovia devonica belongs to Orestovia' according to Ergolskaia 1936
- 'Orioporella belongs to Dasycladaceae'
- 'Orioporella briardi belongs to Orioporella' according to Munier-Chalmas 1922
- 'Ormoxylon belongs to Cordaitales'
- 'Ormoxylon erianum belongs to Ormoxylon' according to Dawson 1871
- 'Ornoxylon belongs to Angiospermae'
- 'Ornoxylon fraxinoides belongs to Ornoxylon' according to Felix 1882
- 'Orphanidesites belongs to Ericaceae'
- 'Orphanidesites primaevus belongs to Orphanidesites' according to Caspary 1881
- 'Orthogoniopteris belongs to Cycadopsida'
- 'Orthogoniopteris clara belongs to Orthogoniopteris' according to Andrews 1875
- 'Orthoporites belongs to Plantae'
- 'Orthoporites apeltianus belongs to Orthoporites' according to Schleiden 1855
- 'Orthotheca belongs to Filicinae'
- 'Orthriosiphon belongs to Codiaceae'
- 'Orthriosiphon saskatchewanensis belongs to Orthriosiphon' according to Johnson and Konishi 1956
- 'Ortiseia belongs to Coniferales'
- 'Ortiseia leonardii belongs to Ortiseia' according to Florin 1964
- 'Ortonella furcata belongs to Ortonella' according to Garwood 1914
- 'Orvillea belongs to Plantae'
- 'Orvillea petrii belongs to Orvillea' according to Barbosa 1949
- 'Orvillea petrii is recombined as Octaviona petrii' according to Sommer 1954
- 'Orygmatosphaeridium belongs to Acritarcha'
- 'Orygmatosphaeridium ruminatum belongs to Orygmatosphaeridium' according to Timofeev 1959
- 'Osagia belongs to Plantae'
- 'Osagia incrustata belongs to Osagia' according to Twenhofel 1919
- 'Oscillatoriites belongs to Oscillatoriacea'
- 'Oscillatoriites bertrandi belongs to Oscillatoriites' according to Zalessky 1927
- 'Osmunda sturii belongs to Osmunda' according to Raciborski 1890
- 'Osmunda sturii is recombined as Osmundopsis sturii' according to Harris 1931
- 'Osmundia belongs to Pteridophyta'
- 'Osmundia tasmanica belongs to Osmundia' according to Johnston 1894
- 'Osmundites is a subjective synonym of Pterophyllum' according to Brongniart 1828
- 'Osmundites belongs to Osmundaceae'
- 'Osmundites pectinatus belongs to Osmundites' according to Jaeger 1827
- 'Osmundites pectinatus is replaced by Pterophyllum jaegeri' according to Brongniart 1828
- 'Osmundites schemnicensis belongs to Osmundites' according to Unger 1854
- 'Osmundophyllum belongs to Pteridophyta'
- 'Osmundophyllum cretaceum belongs to Osmundophyllum' according to Velenovsky 1889
- 'Osmundopsis belongs to Osmundaceae'
- 'Otidophyton belongs to Pteridophyta'
- 'Otidophyton hymenophylloides belongs to Otidophyton' according to White 1905
- 'Otopteris is a subjective synonym of Otozamites' according to Brongniart 1849
- 'Otopteris belongs to Neuropteridae'
- 'Otopteris cycloidea belongs to Otopteris' according to Sauveur 1848
- 'Otopteris obtusa belongs to Otopteris' according to Lindley and Hutton 1834
- 'Otopteris obtusa is recombined as Otozamites obtusus' according to Brongniart 1849
- 'Ottokaria belongs to Pteridospermophyta'
- 'Ottonosia belongs to Plantae'
- 'Ottonosia laminata belongs to Ottonosia' according to Twenhofel 1919
- 'Ourostrobus belongs to Plantae'
- 'Ourostrobus nathorsti belongs to Ourostrobus' according to Harris 1935
- 'Ovalites belongs to Plantae'
- 'Ovalites resinosus belongs to Ovalites' according to Lomax 1911
- 'Ovicarpum belongs to Moraceae'
- 'Ovicarpum reticulatum belongs to Ovicarpum' according to Chandler 1962
- 'Ovopteridium belongs to Sphenopteridae'
- 'Ovopteridium schumanni belongs to Ovopteridium' according to Stur 1909
- 'Ovopteris belongs to Sphenopteridae'
- 'Ovopteris cremeriana belongs to Ovopteris' according to Potonie 1893
- 'Ovularites belongs to Fungi'
- 'Ovularites barbouri belongs to Ovularites' according to Whitford 1916
- 'Ovulites elongata belongs to Ovulites' according to Lamarck 1883
- 'Ovulites margaritula belongs to Ovulites' according to Lamarck 1816
- 'Oxalidites belongs to Oxalidaceae'
- 'Oxalidites brachysepalus belongs to Oxalidites' according to Caspary 1886
- 'Oxroadia belongs to Lycopodophyta'
- 'Oxroadia gracilis belongs to Oxroadia' according to Alvin 1965
- 'Oxycarpia belongs to Plantae'
- 'Oxycarpia bifaria belongs to Oxycarpia' according to Trautschold 1874
- 'Pachydermophyllum belongs to Pteridospermophyta'
- 'Pachylepis belongs to Coniferales'
- 'Pachyphloeus belongs to Lycopodophyta'
- 'Pachyphloeus tetragonus belongs to Pachyphloeus' according to Goeppert 1836
- 'Pachyphyllum belongs to Pteridophyta'
- 'Pachyphyllum fimbriatum belongs to Pachyphyllum' according to Lesquereux 1854
- 'Pachypteris lanceolata belongs to Pachypteris' according to Brongniart 1829
- 'Pachyspermum belongs to Lythraceae'
- 'Pachyspermum quinqueloculare belongs to Pachyspermum' according to Reid and Chandler 1933
- 'Pachysporangium is a nomen nudum'
- 'Pachytesta incrassata belongs to Pachytesta' according to Brongniart 1874
- 'Pachytheca sphaerica belongs to Pachytheca' according to Hooker 1861
- 'Padgettia belongs to Neuropteridae'
- 'Padgettia readi belongs to Padgettia' according to Mamay 1962
- 'Pagiophyllites belongs to Plantae'
- 'Pagiophyllites keuperianus belongs to Pagiophyllites' according to Unger 1911
- 'Pagiophyllum belongs to Coniferophyta'
- 'Pagiophyllum circinicum belongs to Pagiophyllum' according to Saporta 1881
- 'Pagodaporella belongs to Dasycladaceae'
- 'Pagodaporella wetzeli belongs to Pagodaporella' according to Elliott 1956
- 'Pahudioxylon belongs to Leguminosae'
- 'Pahudioxylon bankurensis belongs to Pahudioxylon' according to Chowdhury et al. 1960
- 'Paikhoia belongs to Lycopodophyta'
- 'Paikhoia tchernovi belongs to Paikhoia' according to Zalessky 1936
- 'Palackya belongs to Angiospermae'
- 'Palackya philippinensis belongs to Palackya' according to Crie 1889
- 'Palaeachlya perforans belongs to Palaeachlya' according to Duncan 1876
- 'Palaealectryon belongs to Sapindaceae'
- 'Palaealectryon spirale belongs to Palaealectryon' according to Reid and Chander 1933
- 'Palaeallophyllus belongs to Sapindaceae'
- 'Palaeallophyllus ovoideus belongs to Palaeallophyllus' according to Reid and Chandler 1933
- 'Palaeanthus belongs to Bennettitales'
- 'Palaeanthus problematicus belongs to Palaeanthus' according to Newberry 1895
- 'Palaeeucharidium belongs to Onagraceae'
- 'Palaeeucharidium cellulare belongs to Palaeeucharidium' according to Reid and Chandler 1933
- 'Palaegirvanella belongs to Plantae'
- 'Palaegirvanella erbiensis belongs to Palaegirvanella' according to Krasnopejeva 1937
- 'Palaeoalgites belongs to Plantae'
- 'Palaeoalgites krauseli belongs to Palaeoalgites' according to Weyland and Budde 1932
- 'Palaeoaster belongs to Plantae'
- 'Palaeoaster inquirenda belongs to Palaeoaster' according to Knowlton 1917
- 'Palaeoavena belongs to Gramineae'
- 'Palaeoavena stipaeformis belongs to Palaeoavena' according to Ettingshausen 1890
- 'Palaeobion belongs to Acritarcha'
- 'Palaeobion catenatum belongs to Palaeobion' according to Wetzel 1961
- 'Palaeobromelia belongs to Problematica'
- 'Palaeobromelia jugleri belongs to Palaeobromelia' according to Ettingshausen 1852
- 'Palaeobruguiera belongs to Rhizophoraceae'
- 'Palaeobruguiera elongata belongs to Palaeobruguiera' according to Chandler 1961
- 'Palaeobursera belongs to Burseraceae'
- 'Palaeobursera bognorensis belongs to Palaeobursera' according to Chandler 1961
- 'Palaeocancellus belongs to Plantae'
- 'Palaeocarya belongs to Juglandaceae'
- 'Palaeocarya atavia belongs to Palaeocarya' according to Saporta 1873
- 'Palaeocassia belongs to Papilionaceae'
- 'Palaeocassia augustifolia belongs to Palaeocassia' according to Ettingshausen 1867
- 'Palaeocedrus belongs to Coniferales'
- 'Palaeocedrus exstinctus belongs to Palaeocedrus' according to Unger 1842
- 'Palaeochara belongs to Characeae'
- 'Palaeochara belongs to Charophyta'
- 'Palaeochara acadica belongs to Palaeochara' according to Bell 1922
- 'Palaeochondrites belongs to Charophyta'
- 'Palaeochondrites fruiticulosus belongs to Palaeochondrites' according to Goeppert 1882
- 'Palaeochorda belongs to Plantae'
- 'Palaeochorda minor belongs to Palaeochorda' according to M'Coy 1848
- 'Palaeocladus belongs to Taxaceae'
- 'Palaeocladus belongs to Plantae'
- 'Palaeocladus cuneiformis belongs to Palaeocladus' according to Ettingshausen 1886
- 'Palaeocladus mediterraneus belongs to Palaeocladus' according to Pia 1920
- 'Palaeocleome belongs to Capparidaceae'
- 'Palaeocleome lakense belongs to Palaeocleome' according to Chandler 1962
- 'Palaeococculus belongs to Menispermaceae'
- 'Palaeocodium belongs to Codiaceae'
- 'Palaeocodium saharianum belongs to Palaeocodium' according to Chiarugi 1947
- 'Palaeocryptidium belongs to Acritarcha'
- 'Palaeocryptidium cayeuxi belongs to Palaeocryptidium' according to Deflandre 1955
- 'Palaeocycas belongs to Cycadophyta'
- 'Palaeocycas integer belongs to Palaeocycas' according to Nathorst 1933
- 'Palaeocystodinium belongs to Dinophyceae'
- 'Palaeodasycladus belongs to Dasycladaceae'
- 'Palaeodasycladus mediterraneus belongs to Palaeodasycladus' according to Pia 1927
- 'Palaeodendron belongs to Proteaceae'
- 'Palaeodendron gypsophilum belongs to Palaeodendron' according to Saporta 1862
- 'Palaeodictyon belongs to Problematica'
- 'Palaeodictyon singulare belongs to Palaeodictyon' according to Heer 1865
- 'Palaeodictyon textum is recombined as Reticulum textum' according to Stefani 1879
- 'Palaeodictyon textum belongs to Palaeodictyon' according to Heer 1877
- 'Palaeogleichenia belongs to Filicinae'
- 'Palaeoglenodinium belongs to Dinophyceae'
- 'Palaeoglenodinium cretaceum belongs to Palaeoglenodinium' according to Deflandre 1934
- 'Palaeogoniopteris belongs to Gigantopteridaceae'
- 'Palaeogrewia belongs to Tiliaceae'
- 'Palaeogrewia dejopeae belongs to Palaeogrewia' according to Massalongo 1851
- 'Palaeohepatica belongs to Plantae'
- 'Palaeohepatica rostafinskii belongs to Palaeohepatica' according to Raciborski 1889
- 'Palaeohypnum belongs to Bryophyta'
- 'Palaeohypnum arnoldianum belongs to Palaeohypnum' according to Steere 1946
- 'Palaeohystrichophora belongs to Dinophyceae'
- 'Palaeohystrichophora multispina is recombined as Disconodinium multispinum' according to Eisenack and Cookson 1960
- 'Palaeoipomoea belongs to Plantae'
- 'Palaeoipomoea fukuiensis belongs to Palaeoipomoea' according to Matsuo 1956
- 'Palaeokeura belongs to Pandanaceae'
- 'Palaeokeura pellegriniana belongs to Palaeokeura' according to Massalongo 1853
- 'Palaeolepis belongs to Coniferales'
- 'Palaeolepis bicornuta belongs to Palaeolepis' according to Saporta 1894
- 'Palaeolobium belongs to Leguminosae'
- 'Palaeolobium haeringianum belongs to Palaeolobium' according to Unger 1850
- 'Palaeolythrum belongs to Lythraceae'
- 'Palaeolythrum bournense belongs to Palaeolythrum' according to Chandler 1960
- 'Palaeomicrocystis belongs to Cyanobacteria'
- 'Palaeomicrocystis cambrica belongs to Palaeomicrocystis' according to Korde 1955
- 'Palaeomyces belongs to Fungi'
- 'Palaeomycites is a misspelling of Palaeomyces'
- 'Palaeomyces gracilis belongs to Palaeomyces' according to Renault 1896
- 'Palaeonitella belongs to Characeae'
- 'Palaeonymphaea belongs to Nymphaeaceae'
- 'Palaeonyssa belongs to Nyssaceae'
- 'Palaeonyssa multilocularis belongs to Palaeonyssa' according to Reid and Chandler 1933
- 'Palaeopede whiteleggei belongs to Palaeopede' according to Etheridge 1899
- 'Palaeoperidinium is a nomen nudum'
- 'Palaeoperidinium cayeuxi belongs to Palaeoperidinium' according to Deflandre 1934
- 'Palaeoperidinium cayeuxi is recombined as Phanerodinium cayeuxi' according to Deflandre 1937
- 'Palaeoperone endophytica belongs to Palaeoperone' according to Etheridge 1891
- 'Palaeophoenix belongs to Plantae'
- 'Palaeophoenix aymardi belongs to Palaeophoenix' according to Saporta 1878
- 'Palaeophyllum belongs to Corallinaceae'
- 'Palaeophyllum caucasicum belongs to Palaeophyllum' according to Maslov 1950
- 'Palaeophytocrene belongs to Icacinaceae'
- 'Palaeophytocrene foveolata belongs to Palaeophytocrene' according to Reid and Chandler 1933
- 'Palaeopiceoxylon belongs to Coniferophyta'
- 'Palaeopitys belongs to Plantae'
- 'Palaeopitys milleri belongs to Palaeopitys' according to M'Nab 1870
- 'Palaeoporella variabilis belongs to Palaeoporella' according to Stolley 1893
- 'Palaeoporolithon belongs to Corallinaceae'
- 'Palaeoporolithon microcellularis belongs to Palaeoporolithon' according to Krivan-Hutter 1961
- 'Palaeopotamogeton belongs to Potamogetonaceae'
- 'Palaeopotamogeton florissanti belongs to Palaeopotamogeton' according to Knowlton 1916
- 'Palaeopteridium belongs to Archaeopteridaceae'
- 'Palaeopteridium reussi belongs to Palaeopteridium' according to Ettingshausen 1923
- 'Palaeopteris belongs to Pteridophyta'
- 'Palaeopteris is replaced by Archaeopteris' according to Dawson 1871
- 'Palaeopteris schnorriana belongs to Palaeopteris' according to Geinitz 1855
- 'Palaeopyrum belongs to Gramineae'
- 'Palaeopyrum incertum belongs to Palaeopyrum' according to Schmalhausen 1883
- 'Palaeorachis belongs to Plantae'
- 'Palaeorachis subgracilis belongs to Palaeorachis' according to Saporta 1889
- 'Palaeorchis belongs to Plantae'
- 'Palaeorchis rhyzoma belongs to Palaeorchis' according to Massalongo 1858
- 'Palaeorhodomyrtus belongs to Myrtaceae'
- 'Palaeorhodomyrtus subangulata belongs to Palaeorhodomyrtus' according to Bowerbank 1933
- 'Palaeorivularia belongs to Problematica'
- 'Palaeorivularia ontarica belongs to Palaeorivularia' according to Korde 1958
- 'Palaeosinomenium belongs to Menispermaceae'
- 'Palaeosordaria belongs to Sordariomycetes'
- 'Palaeosordaria lagena belongs to Palaeosordaria' according to Sahni and Rao 1943
- 'Palaeospadix belongs to Palmae'
- 'Palaeospadix girardoti belongs to Palaeospadix' according to Saporta 1886
- 'Palaeospathe belongs to Aurantiaceae'
- 'Palaeospathe sternbergii belongs to Palaeospathe' according to Unger 1845
- 'Palaeostachya belongs to Plantae'
- 'Palaeostachya elongata belongs to Palaeostachya' according to Presl 1876
- 'Palaeostigma sewardi belongs to Palaeostigma' according to Kraeusel and Dolianiti 1957
- 'Palaeostomocystis belongs to Acritarcha'
- 'Palaeostomocystis reticulata belongs to Palaeostomocystis' according to Deflandre 1935
- 'Palaeostrobus belongs to Plantae'
- 'Palaeostrobus mirabilis belongs to Palaeostrobus' according to Corda 1866
- 'Palaeotaxodioxylon belongs to Plantae'
- 'Palaeotaxodioxylon gruenwetterbachense belongs to Palaeotaxodioxylon' according to Frentzen 1916
- 'Palaeotaxus belongs to Coniferales'
- 'Palaeotaxus rediviva belongs to Palaeotaxus' according to Nathorst 1908
- 'Palaeotetradinium belongs to Acritarcha'
- 'Palaeothalia belongs to Scitamineae'
- 'Palaeothalia sanctaejustinae belongs to Palaeothalia' according to Squinabol 1892
- 'Palaeothecium belongs to Bryophyta'
- 'Palaeothecium ambiguum belongs to Palaeothecium' according to Saporta 1888
- 'Palaeothrinax belongs to Palmae'
- 'Palaeothrinax mantelli belongs to Palaeothrinax' according to Reid and Chandler 1926
- 'Palaeovitis belongs to Vitaceae'
- 'Palaeovitis paradoxa belongs to Palaeovitis' according to Reid and Chandler 1933
- 'Palaeovittaria belongs to Polypodiaceae'
- 'Palaeovittaria kurzi belongs to Palaeovittaria' according to Feistmantel 1876
- 'Palaeoweichselia belongs to Filicinae'
- 'Palaeowetherellia belongs to Euphorbiaceae'
- 'Palaeoxylon belongs to Plantae'
- 'Palaeoxylon endlicher belongs to Palaeoxylon' according to Hartig 1848
- 'Palaeoxyris belongs to Problematica'
- 'Palaeozamia belongs to Zamiaceae'
- 'Palamophyllum belongs to Sphenopteridae'
- 'Palaquiophyllum belongs to Sapotaceae'
- 'Palaquiophyllum tenuetorosum belongs to Palaquiophyllum' according to Weyland and Kilpper 1963
- 'Paleodavidia belongs to Nyssaceae'
- 'Paleodictyon strozzi belongs to Paleodictyon' according to Savi and Meneghini 1851
- 'Paleoeriocoma belongs to Gramineae'
- 'Paleoeriocoma hitchcocki belongs to Paleoeriocoma' according to Elias 1942
- 'Paleohillia belongs to Plantae'
- 'Paleohillia arkansana belongs to Paleohillia' according to Knowlton 1895
- 'Paleomeandron rude belongs to Paleomeandron' according to Peruzzi 1881
- 'Paleonelumbo belongs to Nymphaeaceae'
- 'Paleonuphar belongs to Nymphaeaceae'
- 'Paleonuphar inopina belongs to Paleonuphar' according to Hollick 1930
- 'Paleopedicystus belongs to Dinophyceae'
- 'Paleopedicystus rodeoensis belongs to Paleopedicystus' according to Staplin 1961
- 'Paleotaxites belongs to Coniferophyta'
- 'Paleotaxites praecursor belongs to Paleotaxites' according to White 1929
- 'Palhistiodinia belongs to Problematica'
- 'Palhistiodinia arcana belongs to Palhistiodinia' according to Deflandre 1938
- 'Palibinia belongs to Proteaceae'
- 'Palibinia laxifolia belongs to Palibinia' according to Korovin 1932
- 'Palibiniopteris belongs to Filicinae'
- 'Palibiniopteris inaequipinnata belongs to Palibiniopteris' according to Prinada 1956
- 'Palissya belongs to Coniferophyta'
- 'Palissya braunii belongs to Palissya' according to Endlicher 1847
- 'Paliurinella belongs to Plantae'
- 'Paliurinella paffenholzia belongs to Paliurinella' according to Palibin 1937
- 'Paliurites belongs to Rhamnaceae'
- 'Paliurites martyi belongs to Paliurites' according to Langeron 1902
- 'Pallioporia belongs to Symplocaceae'
- 'Pallioporia symplocoides belongs to Pallioporia' according to Kirchheimer 1934
- 'Palmacites belongs to Palmae'
- 'Palmacites axonensis is recombined as Araeis axonensis' according to Stenzel 1872
- 'Palmacites axonensis belongs to Palmacites' according to Watelet 1866
- 'Palmacites lamanonis belongs to Palmacites' according to Brongniart 1822
- 'Palmacites martii belongs to Palmacites' according to Heer 1855
- 'Palmacites martii is recombined as Palmanthium martii' according to Schimper 1870
- 'Palmacites parisiensis belongs to Palmacites' according to Brongniart 1822
- 'Palmacites parisiensis is recombined as Latanites parisiensis' according to Massalongo 1858
- 'Palmacites varians belongs to Palmacites' according to Corda 1845
- 'Palmacites varians is recombined as Cyclois varians' according to Stenzel 1872
- 'Palmanthium belongs to Palmae'
- 'Palmatophycus contractus belongs to Palmatophycus' according to Boucek 1941
- 'Palmatophyllites belongs to Cycadophyta'
- 'Palmatopteris belongs to Sphenopteridae'
- 'Palmatopteris furcata belongs to Palmatopteris' according to Brongniart 1893
- 'Palmites is a nomen nudum'
- 'Palmnickia belongs to Dinophyceae'
- 'Palmnickia lobifera belongs to Palmnickia' according to Eisenack 1954
- 'Palmocarpon belongs to Palmae'
- 'Palmocarpon belongs to Palmae'
- 'Palmocarpon cretaceum belongs to Palmocarpon' according to Miquel 1853
- 'Palmogloeites belongs to Plantae'
- 'Palmogloeites adamantinus belongs to Palmogloeites' according to Goeppert 1869
- 'Palmoidopteris belongs to Monocotyledonae'
- 'Palmoidopteris lapparenti belongs to Palmoidopteris' according to Boureau 1954
- 'Palmophylloites belongs to Tetrasporaceae'
- 'Palmophyllum belongs to Palmae'
- 'Palmophyllum succineum belongs to Palmophyllum' according to Conwentz 1886
- 'Palmospermum belongs to Palmae'
- 'Palmospermum jenkinsi belongs to Palmospermum' according to Reid and Chandler 1933
- 'Palmoxylon belongs to Palmae'
- 'Palmoxylon blanfordi belongs to Palmoxylon' according to Schenk 1882
- 'Palmoxylon sahnii belongs to Palmoxylon' according to Rode 1933
- 'Palmoxylon sahnii is recombined as Cyclanthodendron sahnii' according to Sahni and Surange 1944
- 'Paloreodoxites belongs to Arecaceae'
- 'Palynomorphites belongs to Fungi'
- 'Palynomorphites diversiformis belongs to Palynomorphites' according to Moore 1963
- 'Panacites belongs to Plantae'
- 'Panacites howitti belongs to Panacites' according to Deane 1902
- 'Pandanites belongs to Pandanaceae'
- 'Pandanites belongs to Monocotyledonae'
- 'Pandanites acutidens belongs to Pandanites' according to Tuzson 1914
- 'Pandanites corsoni belongs to Pandanites' according to Dorf 1938
- 'Pandanocarpum belongs to Pinales'
- 'Pandanophyllum belongs to Angiospermae'
- 'Pandanophyllum ahnertii belongs to Pandanophyllum' according to Kryshtofovich 1929
- 'Panescorsea belongs to Plantae'
- 'Panescorsea glomerata belongs to Panescorsea' according to Saporta 1882
- 'Papaninia belongs to Coniferales'
- 'Papaninia involucrata belongs to Papaninia' according to Fedin 1943
- 'Papaverites belongs to Plantae'
- 'Papilionaceae belongs to Fabales'
- 'Papilionaceophyllum belongs to Leguminosae'
- 'Papilionaceophyllum liblarense belongs to Papilionaceophyllum' according to Kraeusel and Weyland 1959
- 'Papilionites belongs to Papilionaceae'
- 'Papilionites erythrinaformis belongs to Papilionites' according to Berry 1924
- 'Papillomembrana belongs to Problematica'
- 'Papillomembrana compta belongs to Papillomembrana' according to Spjeldnaes 1963
- 'Paracalamites belongs to Calamitales'
- 'Paracalamitina is a misspelling of Paracalamites'
- 'Paracalamites striatus belongs to Paracalamites' according to Schmalhausen 1927
- 'Paracalamostachys belongs to Plantae'
- 'Paracalamostachys polystachya belongs to Paracalamostachys' according to Sternberg 1884
- 'Paracalathiops belongs to Pteridospermophyta'
- 'Paracallipteris belongs to Plantae'
- 'Paracallipteris potoniei belongs to Paracallipteris' according to Richter 1904
- 'Paracedroxylon belongs to Araucariaceae'
- 'Paracedroxylon scituatense belongs to Paracedroxylon' according to Sinnott 1909
- 'Parachaetetes ternquisti belongs to Parachaetetes' according to Deninger 1906
- 'Paracredneria belongs to Plantae'
- 'Paracredneria fritschii belongs to Paracredneria' according to Richter 1905
- 'Paracupressinoxylon belongs to Cupressaceae'
- 'Paracupressinoxylon cedroides belongs to Paracupressinoxylon' according to Holden 1913
- 'Paracupressinoxylon cedroides is recombined as Metacupressinoxylon cedroides' according to Torrey 1923
- 'Paracupressinoxylon cupressoides belongs to Paracupressinoxylon' according to Holden 1913
- 'Paracupressinoxylon cupressoides is recombined as Protocupressinoxylon cupressoides' according to Eckhold 1923
- 'Paracycas belongs to Cycadales'
- 'Paracycas cteis belongs to Paracycas' according to Harris 1964
- 'Paradella belongs to Dasycladaceae'
- 'Paradella recta belongs to Paradella' according to Maslov 1956
- 'Paradoxocarpus belongs to Plantae'
- 'Paradoxocarpus carinatus belongs to Paradoxocarpus' according to Nehring 1892
- 'Paradoxopteris belongs to Plantae'
- 'Paradoxopteris stromeri belongs to Paradoxopteris' according to Hirmer 1927
- 'Paradoxoxylon belongs to Gymnospermophyta'
- 'Paradoxoxylon leuthardti belongs to Paradoxoxylon' according to Kraeusel 1955
- 'Paraengelhardtia belongs to Juglandaceae'
- 'Paraengelhardtia eocenica belongs to Paraengelhardtia' according to Berry 1916
- 'Parafagus belongs to Fagaceae'
- 'Parafagus otakouia belongs to Parafagus' according to Oliver 1936
- 'Paragonorrachis belongs to Pteridospermophyta'
- 'Parammodochium belongs to Problematica'
- 'Parammodochium gracile belongs to Parammodochium' according to Deflandre 1932
- 'Paranocladus belongs to Coniferophyta'
- 'Paranocladus dusenii belongs to Paranocladus' according to Florin 1940
- 'Paranymphaea belongs to Nymphaeaceae'
- 'Parapecopteris belongs to Pteropsida'
- 'Parapecopteris nevropteridis belongs to Parapecopteris' according to Grand'Eury 1890
- 'Paraphyllanthoxylon belongs to Angiospermae'
- 'Paraphyllanthoxylon arizonense belongs to Paraphyllanthoxylon' according to Bailey 1924
- 'Paraphyllocladoxylon belongs to Coniferophyta'
- 'Paraphyllocladoxylon eboracense belongs to Paraphyllocladoxylon' according to Holden 1913
- 'Parapitys belongs to Plantae'
- 'Paraporolithon belongs to Corallinaceae'
- 'Paraporolithon saipanense belongs to Paraporolithon' according to Johnson 1957
- 'Pararaucaria belongs to Araucariaceae'
- 'Pararchaeomonas belongs to Problematica'
- 'Paraschizoneura belongs to Plantae'
- 'Paraschizoneura sibirica belongs to Paraschizoneura' according to Neuberg 1955
- 'Parataxodium belongs to Taxodiaceae'
- 'Parataxodium wigginsii belongs to Parataxodium' according to Arnold and Lowther 1955
- 'Parataxopitys belongs to Gymnospermophyta'
- 'Parataxopitys brasiliana belongs to Parataxopitys' according to Maniero 1951
- 'Parathinnfeldia belongs to Plantae'
- 'Parathinnfeldia dubia belongs to Parathinnfeldia' according to Richter 1904
- 'Parenchymophycus belongs to Plantae'
- 'Parenchymophycus asphalticum belongs to Parenchymophycus' according to Duden 1897
- 'Pareodinia belongs to Dinophyceae'
- 'Parhabdolithus belongs to Coccolithophorales'
- 'Parilinopteris belongs to Plantae'
- 'Parinarioxylon belongs to Rosaceae'
- 'Parinarioxylon itersonii belongs to Parinarioxylon' according to Pfeiffer and Heurn 1928
- 'Parineuropteris belongs to Plantae'
- 'Parineuropteris gigantea belongs to Parineuropteris' according to Sternberg 1940
- 'Paripteris belongs to Plantae'
- 'Parka belongs to Plantae'
- 'Parkerella belongs to Dasycladaceae'
- 'Parkerella montensis belongs to Parkerella' according to Munier-Chalmas 1922
- 'Parkeriaceae belongs to Pteridophyta'
- 'Parkerioidea belongs to Pteridophyta'
- 'Parkerioidea stephanensis belongs to Parkerioidea' according to Renault 1901
- 'Parmites belongs to Problematica'
- 'Parmites concrescens belongs to Parmites' according to Raaben 1964
- 'Parnesina belongs to Dasycladaceae'
- 'Parthenites belongs to Plantae'
- 'Parthenites priscus belongs to Parthenites' according to Saporta 1861
- 'Partschia belongs to Pteropsida'
- 'Partschia brongniartii belongs to Partschia' according to Presl 1838
- 'Pasceolus halli belongs to Pasceolus' according to Billings 1857
- 'Pasianopsis belongs to Fagaceae'
- 'Pasianopsis retinervis belongs to Pasianopsis' according to Saporta and Marion 1878
- 'Pasinia belongs to Rhodophyta'
- 'Passalostrobus belongs to Coniferales'
- 'Passifloraephyllum belongs to Passifloraceae'
- 'Passifloraephyllum kraeuseli belongs to Passifloraephyllum' according to Rasky 1960
- 'Pastillus belongs to Plantae'
- 'Pastillus cellulosus belongs to Pastillus' according to Zalessky 1928
- 'Pataloxylon belongs to Angiospermae'
- 'Pataloxylon scalariforme belongs to Pataloxylon' according to Sahni 1920
- 'Patete belongs to Plantae'
- 'Patete scheffleri belongs to Patete' according to Hector 1886
- 'Patherotheca is a nomen nudum'
- 'Patzea belongs to Plantae'
- 'Patzea gnetoides belongs to Patzea' according to Caspary 1872
- 'Patzea johniana belongs to Patzea' according to Conwentz 1886
- 'Paulomyces belongs to Fungi'
- 'Paulomyces dolianitii belongs to Paulomyces' according to Sommer 1954
- 'Paulophyton belongs to Psilophytales'
- 'Paulophyton sommeri belongs to Paulophyton' according to Dolianiti 1954
- 'Paulownioxylon belongs to Lamiales'
- 'Paulownioxylon hondoense belongs to Paulownioxylon' according to Watari 1948
- 'Paurodendron belongs to Lycopodophyta'
- 'Paurodendron arranense belongs to Paurodendron' according to Fry 1954
- 'Peckichara belongs to Charophyta'
- 'Peckisphaera belongs to Charophyta'
- 'Pecopteridium belongs to Plantae'
- 'Pecopteridium belongs to Filicinae'
- 'Pecopteridium is replaced by Jidopteris' according to Koidzumi 1936
- 'Pecopteridium manchuricum is recombined as Jidopteris manchurica' according to Koidzumi 1936
- 'Pecopteridium manchuricum belongs to Pecopteridium' according to Kawasaki 1931
- 'Pecopteris debile belongs to Pecopteris' according to Sternberg 1825
- 'Pecopteris debile is recombined as Phthinophyllum debile' according to Stur 1877
- 'Pecopteris defrancei is recombined as Palaeoweichselia defrancei' according to Potonie and Gothan 1909
- 'Pecopteris defrancei is recombined as Pseudopecopteris defrancei' according to Grand'Eury 1877
- 'Pecopteris defrancei belongs to Pecopteris' according to Brongniart 1834
- 'Pecopteris dentata belongs to Pecopteris' according to Brongniart 1835
- 'Pecopteris dentata is recombined as Prepecopteris dentata' according to Grand'Eury 1877
- 'Pecopteris exigua is recombined as Diplasterotheca exigua' according to Hirmer 1927
- 'Pecopteris exigua belongs to Pecopteris' according to Renault 1883
- 'Pecopteris goepperti belongs to Pecopteris' according to Morris 1845
- 'Pecopteris goepperti is recombined as Cymoglossa goepperti' according to Schimper 1869
- 'Pecopteris gracilis belongs to Pecopteris' according to Heer 1865
- 'Pecopteris gracilis is recombined as Palaeogleichenia gracilis' according to Leuthardt 1901
- 'Pecopteris hemitelioides belongs to Pecopteris' according to Brongniart 1834
- 'Pecopteris hemitelioides is recombined as Hemitelites hemitelioides' according to Goeppert 1836
- 'Pecopteris intermedia belongs to Pecopteris' according to Renault 1883
- 'Pecopteris intermedia is recombined as Sturiella intermedia' according to Weiss 1885
- 'Pecopteris murrayana belongs to Pecopteris' according to Brongniart 1835
- 'Pecopteris murrayana is recombined as Coniopteris murrayana' according to Brongniart 1849
- 'Pecopteris murrayana is recombined as Polystichites murrayana' according to Presl 1838
- 'Pecopteris ottonis is recombined as Stichopteris ottonis' according to Geinitz 1858
- 'Pecopteris ottonis belongs to Pecopteris' according to Gutbier 1849
- 'Pecopteris pluckenetii belongs to Pecopteris' according to Schlotheim 1825
- 'Pecopteris pluckenetii is recombined as Pecopteridium pluckenetii' according to Picquenard 1922
- 'Pecopteris williamsonis belongs to Pecopteris' according to Brongniart 1834
- 'Pecopteris williamsonis is recombined as Acrostichites williamsonis' according to Goeppert 1836
- 'Pecopteromedullosa belongs to Plantae'
- 'Pectinophyton belongs to Plantae'
- 'Pectinophyton norvegicum belongs to Pectinophyton' according to Hoeg 1935
- 'Pediastrites belongs to Chlorophyceae'
- 'Pediastrites kidstoni belongs to Pediastrites' according to Zalessky 1927
- 'Pelicothallos belongs to Microthyriaceae'
- 'Pelicothallos villosus belongs to Pelicothallos' according to Dilcher 1965
- 'Pelletieria belongs to Schizaeaceae'
- 'Pelletieria valdensis belongs to Pelletieria' according to Seward 1913
- 'Pelourdea belongs to Cordaitales'
- 'Pelourdea vogesiaca belongs to Pelourdea' according to Schimper and Mougeot 1917
- 'Peltaspermum belongs to Pteridospermophyta'
- 'Peltaspermum rotula belongs to Peltaspermum' according to Harris 1937
- 'Peltastrobus belongs to Plantae'
- 'Peltastrobus reedae belongs to Peltastrobus' according to Baxter 1950
- 'Peltophyllum belongs to Plantae'
- 'Peltophyllum nelumbioides belongs to Peltophyllum' according to Massalongo 1854
- 'Pemma belongs to Coccolithophorales'
- 'Pemma rotundum belongs to Pemma' according to Klumpp 1953
- 'Penhallowia belongs to Plantae'
- 'Penicillites belongs to Plantae'
- 'Penicillites curtipes belongs to Penicillites' according to Berkeley 1892
- 'Penicilloides belongs to Plantae'
- 'Pennsylvanioxylon belongs to Pinopsida'
- 'Pentacoila belongs to Plantae'
- 'Pentacoila gulgongensis belongs to Pentacoila' according to Mueller 1877
- 'Pentadinium belongs to Dinoflagellata'
- 'Pentadinium laticinctum belongs to Pentadinium' according to Gerlach 1961
- 'Penteune belongs to Plantae'
- 'Penteune clarkei belongs to Penteune' according to Mueller 1873
- 'Pentoxylon belongs to Pentoxylaceae'
- 'Pentoxylon sahnii belongs to Pentoxylon' according to Srivastava 1944
- 'Pereborites belongs to Plantae'
- 'Pereborites rarinervis belongs to Pereborites' according to Zalessky 1934
- 'Peremopteris belongs to Pteridophyta'
- 'Peremopteris sylvaeana belongs to Peremopteris' according to Zalessky 1937
- 'Perfossus belongs to Palmae'
- 'Perfossus angularis belongs to Perfossus' according to Cotta 1832
- 'Periastron belongs to Pteridospermophyta'
- 'Periastron reticulatum belongs to Periastron' according to Unger 1856
- 'Perichoderma belongs to Problematica'
- 'Perichoderma asteroides belongs to Perichoderma' according to Williamson 1912
- 'Pericordaites belongs to Cordaitales'
- 'Pericordaites eugeniae belongs to Pericordaites' according to Zalessky 1927
- 'Peridinites belongs to Dinophyceae'
- 'Peridinites parvulus belongs to Peridinites' according to Lefevre 1933
- 'Perimneste belongs to Charophyta'
- 'Perimneste corrugata belongs to Perimneste' according to Peck 1941
- 'Perimneste corrugata is recombined as Clypeator corrugatus' according to Grambast 1962
- 'Perimneste horrida belongs to Perimneste' according to Harris 1939
- 'Perisporiacites belongs to Fungi'
- 'Perisporiacites larundae belongs to Perisporiacites' according to Felix 1894
- 'Peritrachelina belongs to Coccolithophorales'
- 'Peritrachelina ornata belongs to Peritrachelina' according to Deflandre 1952
- 'Permocalculus belongs to Gymnocodiaceae'
- 'Permophyllum belongs to Ginkgoales'
- 'Permophyllum incisum belongs to Permophyllum' according to Zalessky 1937
- 'Permopora belongs to Dasycladaceae'
- 'Permopora keenae belongs to Permopora' according to Elias 1947
- 'Permopteridium belongs to Pteridophyta'
- 'Permopteridium densinervum belongs to Permopteridium' according to Zalessky 1939
- 'Permosamaropsis belongs to Plantae'
- 'Permosperma belongs to Plantae'
- 'Permosperma ornatum belongs to Permosperma' according to Zalessky 1939
- 'Permotheca sardykensis belongs to Permotheca' according to Zalessky 1929
- 'Peronosporaceae belongs to Fungi'
- 'Peronosporites belongs to Fungi'
- 'Peronosporites antiquarius belongs to Peronosporites' according to Smith 1877
- 'Peronosporoides belongs to Fungi'
- 'Peronosporoides belongs to Peronosporaceae'
- 'Peronosporoides carbonifera belongs to Peronosporoides' according to Smith 1896
- 'Peronosporoides palmi belongs to Peronosporoides' according to Berry 1916
- 'Perrandoa belongs to Palmae'
- 'Perrandoa protogaea belongs to Perrandoa' according to Squinabol 1891
- 'Perseophyllum belongs to Plantae'
- 'Perseophyllum hauthalianum belongs to Perseophyllum' according to Kurtz 1902
- 'Perseoxylon belongs to Angiospermae'
- 'Perseoxylon antiquum belongs to Perseoxylon' according to Felix 1887
- 'Peruviophyllum belongs to Pteridophyta'
- 'Peruviophyllum minutifolium belongs to Peruviophyllum' according to Steinmann 1929
- 'Pestalozzites belongs to Melanconiaceae'
- 'Pestalozzites sabalana belongs to Pestalozzites' according to Berry 1917
- 'Petcheria belongs to Plantae'
- 'Petcheria elongata belongs to Petcheria' according to Zalessky 1934
- 'Petcheropteris belongs to Osmundaceae'
- 'Petcheropteris splendida belongs to Petcheropteris' according to Zalessky 1931
- 'Peteinosphaeridium belongs to Acritarcha'
- 'Peteinosphaeridium bergstromii belongs to Peteinosphaeridium' according to Staplin et al. 1965
- 'Petrophiloides belongs to Coniferales'
- 'Petrophyton belongs to Plantae'
- 'Petrophyton miyakoense belongs to Petrophyton' according to Yabe 1912
- 'Petrosphaeria belongs to Fungi'
- 'Petrosphaeria japonica belongs to Petrosphaeria' according to Stopes and Fujii 1910
- 'Petschoria belongs to Florideae'
- 'Petschoria elegans belongs to Petschoria' according to Korde 1951
- 'Petzholdtia belongs to Plantae'
- 'Petzholdtia tropica belongs to Petzholdtia' according to Unger 1842
- 'Petzia belongs to Plantae'
- 'Peuce belongs to Coniferophyta'
- 'Peuce acerosa is recombined as Eleoxylon acerosum' according to Brongniart 1849
- 'Peuce acerosa belongs to Peuce' according to Unger 1841
- 'Peuce acerosa is recombined as Belidoxylon acerosa' according to Hartig 1848
- 'Peuce cretacea belongs to Peuce' according to Corda 1847
- 'Peuce cretacea is recombined as Colymboxylon cretacea' according to Hartig 1848
- 'Peuce hoedliana belongs to Peuce' according to Unger 1839
- 'Peuce hoedliana is recombined as Campoxylon hoedlianum' according to Hartig 1848
- 'Peuce lindleyana belongs to Peuce' according to Witham 1833
- 'Peuce lindleyana is recombined as Tiloxylon lindleyana' according to Hartig 1848
- 'Peuce withami belongs to Peuce' according to Lindley and Hutton 1832
- 'Peuce withami is recombined as Cedroxylon withami' according to Kraus 1870
- 'Peucedanites belongs to Umbelliferae'
- 'Peucedanites spectabilis belongs to Peucedanites' according to Heer 1859
- 'Pezizites belongs to Fungi'
- 'Pezizites sylvaticus belongs to Pezizites' according to Ludwig 1892
- 'Phacidiopsis belongs to Ascomycota'
- 'Phacidites belongs to Fungi'
- 'Phacidites sinuosus belongs to Phacidites' according to Ludwig 1892
- 'Phacites belongs to Plantae'
- 'Phacites alpinus belongs to Phacites' according to Jacquin 1829
- 'Phacolepis belongs to Coniferales'
- 'Phacolepis mendozana belongs to Phacolepis' according to Frenguelli 1942
- 'Phacoplasmium belongs to Plantae'
- 'Phaethusa belongs to Plantae'
- 'Phaethusa lachrymabunda belongs to Phaethusa' according to Koenig 1825
- 'Phanerodinium belongs to Dinophyceae'
- 'Phanerophlebites belongs to Polypodiaceae'
- 'Phanerophlebites pealei belongs to Phanerophlebites' according to Knowlton 1922
- 'Phaseolites belongs to Leguminosae'
- 'Phaseolites cassiaefolius belongs to Phaseolites' according to Unger 1850
- 'Phaseolites orbicularis belongs to Phaseolites' according to Unger 1851
- 'Phegonium is replaced by Fegonium' according to Unger 1847
- 'Phellinites belongs to Plantae'
- 'Phellinites digiustoi belongs to Phellinites' according to Singer and Archangelsky 1958
- 'Phellomycetes belongs to Fungi'
- 'Phellomycites is a misspelling of Phellomycetes'
- 'Phellomycetes dubius belongs to Phellomycetes' according to Renault 1896
- 'Phelonites belongs to Plantae'
- 'Phelonites lignitum belongs to Phelonites' according to Fresenius 1861
- 'Phenacocladus belongs to Rhodomelaceae'
- 'Phenacocladus hendersoni belongs to Phenacocladus' according to Cockerell 1926
- 'Phenanthera belongs to Caryophyllales'
- 'Phenanthera petalifera belongs to Phenanthera' according to Hollick 1907
- 'Phialophloios belongs to Lycopodophyta'
- 'Phialophloios quadratus belongs to Phialophloios' according to Horich 1915
- 'Phialopteris belongs to Pteridophyta'
- 'Phialopteris tenera belongs to Phialopteris' according to Presl 1838
- 'Phillipsia belongs to Lepidodendraceae'
- 'Phlebomeris belongs to Matoniaceae'
- 'Phlebomeris spectanda belongs to Phlebomeris' according to Saporta 1894
- 'Phlebopteris belongs to Matoniaceae'
- 'Phlebopteris polypodioides belongs to Phlebopteris' according to Brongniart 1836
- 'Phleboxylon belongs to Coniferophyta'
- 'Phleboxylon pannonica belongs to Phleboxylon' according to Unger 1848
- 'Phloisbolithes belongs to Plantae'
- 'Phloisbolithes striatus belongs to Phloisbolithes' according to Steger 1883
- 'Phoenicites belongs to Plantae'
- 'Phoenicites danteana is recombined as Manicarites dantesianus' according to Bureau 1896
- 'Phoenicites danteana belongs to Phoenicites' according to Massalongo 1858
- 'Phoenicites danteana is recombined as Hemiphoenicites dantesiana' according to Visiani 1864
- 'Phoenicites pumila belongs to Phoenicites' according to Brongniart 1828
- 'Phoenicocarpus is a nomen nudum'
- 'Phoenicopteris is a misspelling of Phoenicopsis'
- 'Phoenicopsis belongs to Cycadophyta'
- 'Phoenicopsis angustifolia belongs to Phoenicopsis' according to Heer 1876
- 'Phoenicopteris croizeti belongs to Phoenicopteris' according to Lapparent 1883
- 'Pholidophloios belongs to Lycopodophyta'
- 'Pholidophloios calmiusicus belongs to Pholidophloios' according to Zalessky 1934
- 'Pholidophorus belongs to Plantae'
- 'Pholidophorus beggiatianus belongs to Pholidophorus' according to Zigno 1856
- 'Phomites belongs to Fungi'
- 'Phormidioidea belongs to Corallinales'
- 'Phormidioidea superba belongs to Phormidioidea' according to Wieland 1930
- 'Phragmoporella belongs to Dasycladaceae'
- 'Phragmoporella monilis belongs to Phragmoporella' according to Rezak 1959
- 'Phragmothyrites belongs to Microthyriaceae'
- 'Phthinophyllum belongs to Pteropsida'
- 'Phycodes sericeus belongs to Phycodes' according to Richter 1850
- 'Phycoidella belongs to Plantae'
- 'Phycoidella stichidifera belongs to Phycoidella' according to Matthew 1889
- 'Phycomycetes belongs to Fungi'
- 'Phycomycites belongs to Phycomycetes'
- 'Phycomycites frodinghamii belongs to Phycomycites' according to Ellis 1915
- 'Phycopsis belongs to Plantae'
- 'Phycopsis affinis belongs to Phycopsis' according to Sternberg 1896
- 'Phycosiphon incertum belongs to Phycosiphon' according to von Fischer-Ooster 1858
- 'Phylladoderma belongs to Cordaitales'
- 'Phylladoderma arberi belongs to Phylladoderma' according to Zalessky 1914
- 'Phylladodesme belongs to Ginkgophyta'
- 'Phylladodesme zeilleri belongs to Phylladodesme' according to Zalessky 1929
- 'Phyllanthinium belongs to Euphorbiaceae'
- 'Phyllanthinium pseudohobashiraishi belongs to Phyllanthinium' according to Ogura 1932
- 'Phyllerites belongs to Plantae'
- 'Phyllerites palaeocassiae belongs to Phyllerites' according to Ettingshausen 1892
- 'Phyllites belongs to Angiospermae'
- 'Phyllites cinnamomeifolia belongs to Phyllites' according to Brongniart 1828
- 'Phyllites cinnamomeifolia is recombined as Daphnogene cinnamomeifolia' according to Unger 1845
- 'Phyllites populina belongs to Phyllites' according to Brongniart 1822
- 'Phyllitites belongs to Plantae'
- 'Phyllitites rugosus belongs to Phyllitites' according to Fucini 1936
- 'Phyllocannites belongs to Plantae'
- 'Phyllochorda belongs to Plantae'
- 'Phyllochorda sinuosa belongs to Phyllochorda' according to Ludwig 1879
- 'Phyllocladites belongs to Pteridophyta'
- 'Phyllocladopitys belongs to Coniferophyta'
- 'Phyllocladopitys capensus belongs to Phyllocladopitys' according to Kraeusel 1928
- 'Phyllocladopsis belongs to Podocarpaceae'
- 'Phyllocladopsis heterophylla belongs to Phyllocladopsis' according to Fontaine 1889
- 'Phyllocladus muelleri belongs to Phyllocladus' according to Schenk 1879
- 'Phyllocladus muelleri is recombined as Phyllocladoxylon muelleri' according to Gothan 1905
- 'Phyllocladus subintegrifolius belongs to Phyllocladus' according to Lesquereux 1868
- 'Phyllocladus subintegrifolius is recombined as Protophyllocladus subintegrifolius' according to Berry 1903
- 'Phyllodermium belongs to Angiospermae'
- 'Phyllodermium reinschii belongs to Phyllodermium' according to Miner 1935
- 'Phyllopitys belongs to Plantae'
- 'Phyllopitys heeri belongs to Phyllopitys' according to Schmalhausen 1918
- 'Phyllopteris is a subjective synonym of Sagenopteris'
- 'Phyllopteroides belongs to Cycadophyta'
- 'Phyllopteroides dentata belongs to Phyllopteroides' according to Medwell 1954
- 'Phyllostrobus belongs to Coniferophyta'
- 'Phyllostrobus lorteti belongs to Phyllostrobus' according to Saporta 1873
- 'Phyllotaenia belongs to Monocotyledonae'
- 'Phyllotaenia demersa belongs to Phyllotaenia' according to Saporta 1894
- 'Phyllotenia belongs to Ginkgoales'
- 'Phyllotenia longifolia belongs to Phyllotenia' according to Salfeld 1909
- 'Phyllothallus belongs to Plantae'
- 'Phyllotheca australis belongs to Phyllotheca' according to Brongniart 1828
- 'Phyllotheca robusta belongs to Phyllotheca' according to Feistmantel 1880
- 'Phymatocaryon belongs to Plantae'
- 'Phymatocaryon mackayi belongs to Phymatocaryon' according to Mueller 1871
- 'Phymatoderma belongs to Plantae'
- 'Phymatolithes belongs to Plantae'
- 'Phymatolithes algeformis belongs to Phymatolithes' according to Romanowski 1890
- 'Physagenia belongs to Plantae'
- 'Physagenia parlatorii belongs to Physagenia' according to Heer 1855
- 'Physematopitys belongs to Coniferophyta'
- 'Physematopitys salisburioides belongs to Physematopitys' according to Goeppert 1850
- 'Physophycus belongs to Chlorophyta'
- 'Physophyllum belongs to Melastomataceae'
- 'Physophyllum tococaefolium belongs to Physophyllum' according to Massalongo 1858
- 'Physoporella belongs to Dasycladaceae'
- 'Physostoma belongs to Pteridospermophyta'
- 'Physostoma elegans belongs to Physostoma' according to Williamson 1876
- 'Phytocalyx belongs to Plantae'
- 'Phytocalyx antiquus belongs to Phytocalyx' according to Bornemann 1886
- 'Phytolithus belongs to Plantae'
- 'Phytolithus sulcatus belongs to Phytolithus' according to Sternberg 1825
- 'Phytopsis tubulosum belongs to Phytopsis' according to Hall 1847
- 'Phytoradicularia belongs to Plantae'
- 'Phytoradicularia dubia belongs to Phytoradicularia' according to Hollick 1930
- 'Phytospongia belongs to Plantae'
- 'Phytospongia cylindrica belongs to Phytospongia' according to Maslov 1960
- 'Piaea belongs to Dasycladaceae'
- 'Piaea punctata belongs to Piaea' according to Florin 1929
- 'Piaella belongs to Plantae'
- 'Piaella biformis belongs to Piaella' according to Fucini 1936
- 'Pianella belongs to Dasycladaceae'
- 'Pianella grudii belongs to Pianella' according to Radoicic 1962
- 'Piccolominites belongs to Plantae'
- 'Piccolominites sardus belongs to Piccolominites' according to Unger 1845
- 'Piceites belongs to Coniferales'
- 'Piceites reucheanus belongs to Piceites' according to Goeppert and Berendt 1850
- 'Piceophyllum belongs to Coniferales'
- 'Piceophyllum simplex belongs to Piceophyllum' according to Ogura 1932
- 'Piceoxylon belongs to Coniferophyta'
- 'Piceoxylon pseudotsugae belongs to Piceoxylon' according to Gothan 1906
- 'Piceoxylon transiens belongs to Piceoxylon' according to Shimakura 1937
- 'Piceoxylon transiens is recombined as Palaeopiceoxylon transiens' according to Kraeusel 1949
- 'Pietzschia belongs to Cladoxylopsida'
- 'Pietzschia schulleri belongs to Pietzschia' according to Gothan 1927
- 'Pila belongs to Plantae'
- 'Pila bibractensis belongs to Pila' according to Bertrand and Renault 1892
- 'Pillulasclerotes belongs to Fungi'
- 'Pillulasclerotes incertus belongs to Pillulasclerotes' according to Stach and Pickhardt 1957
- 'Pilodea belongs to Chaetangiaceae'
- 'Pilophorosperma belongs to Pteridospermophyta'
- 'Pilophorosperma granulatum belongs to Pilophorosperma' according to Thomas 1933
- 'Pilularites belongs to Plantae'
- 'Pilularites braunii belongs to Pilularites' according to Goeppert 1837
- 'Pimpinellites belongs to Umbelliferae'
- 'Pimpinellites zizioides belongs to Pimpinellites' according to Unger 1839
- 'Pinakodendron belongs to Plantae'
- 'Pinakodendron musivum belongs to Pinakodendron' according to Weiss 1893
- 'Piniphyllum is a nomen nudum'
- 'Pinites belongs to Cordaitales'
- 'Pinites aquisgranensis belongs to Pinites' according to Goeppert 1842
- 'Pinites aquisgranensis is recombined as Cycadopsis aquisgranensis' according to Debey 1848
- 'Pinites brandlingi belongs to Pinites' according to Lindley and Hutton 1831
- 'Pinites brandlingi is recombined as Pycnophyllites brandlingi' according to Tuzson 1911
- 'Pinites carbonaceus belongs to Pinites' according to Witham 1833
- 'Pinites carbonaceus is recombined as Araucarioxylon carbonaceum' according to Kraus 1870
- 'Pinites latiporosus belongs to Pinites' according to Cramer 1868
- 'Pinites latiporosus is recombined as Xenoxylon latiporosum' according to Gothan 1905
- 'Pinites ruffordi belongs to Pinites' according to Seward 1895
- 'Pinites ruffordi is recombined as Protopinuxylon ruffordi' according to Eckhold 1922
- 'Pinites succinifer belongs to Pinites' according to Goeppert and Berendt 1845
- 'Pinites succinifer is recombined as Pinuxylon succinifer' according to Gothan 1906
- 'Pinites withami belongs to Pinites' according to Lindley and Hutton 1831
- 'Pinites withami is recombined as Dadoxylon withami' according to Endlicher 1847
- 'Pinites withami is recombined as Medulloxylon withamii' according to Hartig 1848
- 'Pinnularia belongs to Calamitaceae'
- 'Pinnularia capillacea belongs to Pinnularia' according to Lindley and Hutton 1834
- 'Pinostrobus belongs to Coniferales'
- 'Pinostrobus sussexiensis belongs to Pinostrobus' according to Mantel 1915
- 'Pinostrobus vallidus belongs to Pinostrobus' according to Feistmantel 1875
- 'Pinostrobus vallidus is a nomen nudum'
- 'Pinoxylon belongs to Pinaceae'
- 'Pinoxylon dakotense belongs to Pinoxylon' according to Knowlton 1900
- 'Pinus auerbachi is recombined as Cladocedroxylon auerbachi' according to Felix 1882
- 'Pinus auerbachi belongs to Pinus' according to Ludwig 1863
- 'Pinus lundgreni belongs to Pinus' according to Nathorst 1878
- 'Pinus lundgreni is recombined as Protolarix lundgreni' according to Saporta 1876
- 'Pinuxylon belongs to Cordaitales'
- 'Piperites belongs to Piperaceae'
- 'Piperites miquelianus belongs to Piperites' according to Goeppert 1854
- 'Piranheoxylon belongs to Euphorbiaceae'
- 'Piranheoxylon stockmansi belongs to Piranheoxylon' according to Grambast 1961
- 'Piroconites belongs to Bennettitales'
- 'Piroconites kusperti belongs to Piroconites' according to Gothan 1914
- 'Pisoniaephyllites is a nomen nudum'
- 'Pistites belongs to Araceae'
- 'Pistites loriformis belongs to Pistites' according to Hosius and Marck 1880
- 'Pitella belongs to Problematica'
- 'Pitella lanceolata belongs to Pitella' according to Semikhatov 1962
- 'Pitoxylon is a subjective synonym of Peuce'
- 'Pitus belongs to Cordaitales'
- 'Pitys is a misspelling of Pitus'
- 'Pitus antiqua belongs to Pitus' according to Witham 1833
- 'Pityanthus belongs to Coniferales'
- 'Pityeae belongs to Cordaitales'
- 'Pityites belongs to Coniferophyta'
- 'Pityites solmsi belongs to Pityites' according to Seward 1919
- 'Pityocladus belongs to Coniferales'
- 'Pityocladus longifolius belongs to Pityocladus' according to Seward 1919
- 'Pityoidolepis belongs to Coniferales'
- 'Pityophyllum belongs to Coniferophyta'
- 'Pityophyllum staratschini belongs to Pityophyllum' according to Nathorst 1899
- 'Pityoradix belongs to Plantae'
- 'Pityoradix irkutensis belongs to Pityoradix' according to Chachlov 1924
- 'Pityospermum belongs to Plantae'
- 'Pityospermum maakianum belongs to Pityospermum' according to Heer 1899
- 'Pityostrobus belongs to Pinaceae'
- 'Pityostrobus macrocephalus belongs to Pityostrobus' according to Lindley and Hutton 1916
- 'Pityoxylon belongs to Plantae'
- 'Pityoxylon sandbergeri belongs to Pityoxylon' according to Kraus 1870
- 'Plagiopodopsis belongs to Bartramiaceae'
- 'Plagiopodopsis scudderi belongs to Plagiopodopsis' according to Britton and Hollick 1915
- 'Plagiozamiopsis belongs to Cycadophyta'
- 'Plagiozamiopsis podozamioides belongs to Plagiozamiopsis' according to Sze 1943
- 'Plagiozamites belongs to Cycadophyta'
- 'Plagiozamites planchardi belongs to Plagiozamites' according to Renault 1894
- 'Planoxylon belongs to Coniferophyta'
- 'Planoxylon hectori belongs to Planoxylon' according to Stopes 1916
- 'Plantaginopsis belongs to Angiospermae'
- 'Plantaginopsis marylandica belongs to Plantaginopsis' according to Fontaine 1905
- 'Plataninium belongs to Plantae'
- 'Plataninium acerinum belongs to Plataninium' according to Unger 1842
- 'Platanites belongs to Platanaceae'
- 'Platanites herbridicus belongs to Platanites' according to Forbes 1851
- 'Platanophyllum crassinerve belongs to Platanophyllum' according to Fontaine 1889
- 'Platanoxylon belongs to Platanaceae'
- 'Platycardia belongs to Plantae'
- 'Platycardia bengalensis belongs to Platycardia' according to Pant and Nautiyal 1960
- 'Platyceriphyllum belongs to Polypodiaceae'
- 'Platycerites is a nomen nudum'
- 'Platycerium cretaceum belongs to Platycerium' according to Velenovsky 1889
- 'Platycerium cretaceum is recombined as Platyceriphyllum cretaceum' according to Velenovsky 1889
- 'Platychara belongs to Charophyta'
- 'Platycoila belongs to Angiospermae'
- 'Platycoila sullivani belongs to Platycoila' according to Mueller 1874
- 'Platycystidia belongs to Acritarcha'
- 'Platycystidia diptera belongs to Platycystidia' according to Cookson and Eisenack 1960
- 'Platylepidium belongs to Plantae'
- 'Platylepidium oblanceolatum belongs to Platylepidium' according to Turutanova-Ketova 1950
- 'Platylepis belongs to Cycadophyta'
- 'Platylepis micromyela belongs to Platylepis' according to Saporta 1874
- 'Platylithophycus belongs to Codiaceae'
- 'Platylithophycus cretaceum belongs to Platylithophycus' according to Johnson and Howell 1948
- 'Platymastixia belongs to Cornaceae'
- 'Platymastixia cacaoides belongs to Platymastixia' according to Zenker 1934
- 'Platypeuce belongs to Plantae'
- 'Platypeuce dichotoma belongs to Platypeuce' according to Menge 1850
- 'Platyphyllum brownianum belongs to Platyphyllum' according to Dawson 1881
- 'Platypterygium belongs to Cycadophyta'
- 'Platypterygium balli belongs to Platypterygium' according to Feistmantel 1886
- 'Platyspermum belongs to Plantae'
- 'Platyspermum sulcatum belongs to Platyspermum' according to Arber 1914
- 'Platyspiroxylon belongs to Coniferophyta'
- 'Platyspiroxylon heteroparenchymatosum belongs to Platyspiroxylon' according to Greguss 1961
- 'Plectites belongs to Plantae'
- 'Plectosclerotes belongs to Fungi'
- 'Plectosclerotes implicatus belongs to Plectosclerotes' according to Stach and Pickhardt 1957
- 'Pleiacron belongs to Angiospermae'
- 'Pleiacron elachocarpum belongs to Pleiacron' according to Mueller 1877
- 'Pleioclinis belongs to Plantae'
- 'Pleioclinis couchmanii belongs to Pleioclinis' according to Mueller 1882
- 'Pleiomerites belongs to Myrsinaceae'
- 'Pleiomerites reticulatus belongs to Pleiomerites' according to Ettingshausen 1868
- 'Pleiomeropsis belongs to Myrsinaceae'
- 'Pleiomeropsis rottensis belongs to Pleiomeropsis' according to Weyland 1938
- 'Pleiotrichium belongs to Cycadales'
- 'Pleiotrichium commelinoides belongs to Pleiotrichium' according to Weyland and Greifeld 1953
- 'Pleosporites belongs to Fungi'
- 'Pleosporites shirainus belongs to Pleosporites' according to Suzuki 1910
- 'Plesiocapparis belongs to Plantae'
- 'Plesiocapparis prisca belongs to Plesiocapparis' according to Mueller 1871
- 'Pleurocapsites belongs to Plantae'
- 'Pleurocapsites angaricus belongs to Pleurocapsites' according to Maslov 1960
- 'Pleurodictytes belongs to Plantae'
- 'Pleuromeya is a misspelling of Pleuromeia'
- 'Pleuroplasmium belongs to Plantae'
- 'Pleurostromium belongs to Plantae'
- 'Pleurozonaria belongs to Chlorophyceae'
- 'Pleurozonaria globosus belongs to Pleurozonaria' according to Wetzel 1933
- 'Plexiplica belongs to Cornaceae'
- 'Plexiplica reidi belongs to Plexiplica' according to Kirchheimer 1935
- 'Plinthiotheca belongs to Plantae'
- 'Plinthiotheca anatolica belongs to Plinthiotheca' according to Zeiller 1899
- 'Plocarites belongs to Plantae'
- 'Plocarites polymorphus belongs to Plocarites' according to Massalongo 1851
- 'Plochmopeltinites belongs to Micropeltaceae'
- 'Plochmopeltinites masoni belongs to Plochmopeltinites' according to Cookson 1947
- 'Pluma belongs to Glossopteridaceae'
- 'Pluma longicaulis belongs to Pluma' according to Plumstead 1958
- 'Plumalina gracilis belongs to Plumalina' according to Hall 1858
- 'Plumatopteris belongs to Pteridophyta'
- 'Plumatopteris elegans belongs to Plumatopteris' according to Kidston 1894
- 'Plumsteadia belongs to Glossopteridaceae'
- 'Plumsteadia microsacca belongs to Plumsteadia' according to Rigby 1962
- 'Pluriarvalium belongs to Dinoflagellata'
- 'Pluriarvalium osmingtonense belongs to Pluriarvalium' according to Sarjeant 1962
- 'Plutonia belongs to Coniferales'
- 'Plutonia cretaceae belongs to Plutonia' according to Velenovsky 1889
- 'Poacites belongs to Poaceae'
- 'Poacites carinata belongs to Poacites' according to Brongniart 1822
- 'Poacites carinata is replaced by Lepidophyllum lineare' according to Brongniart 1828
- 'Poacites cocoina belongs to Poacites' according to Lindley and Hutton 1898
- 'Poacites firmus belongs to Poacites' according to Heer 1855
- 'Poacites latifolius belongs to Poacites' according to Goeppert 1844
- 'Poacites latifolius is recombined as Poacordaites latifolius' according to Grand'Eury 1877
- 'Poacites zeaeformis is recombined as Coleophyllites zeaeformis' according to Grand'Eury 1877
- 'Poacites zeaeformis belongs to Poacites' according to Schlotheim 1820
- 'Poacordaites belongs to Pteridophyta'
- 'Poacordaixylon belongs to Cordaitales'
- 'Poacordaixylon stephanense belongs to Poacordaixylon' according to Renault 1885
- 'Podalyriophyllum belongs to Leguminosae'
- 'Podalyriophyllum brochidodromum belongs to Podalyriophyllum' according to Ettingshausen 1895
- 'Podocarpites belongs to Coniferophyta'
- 'Podocarpites acicularis belongs to Podocarpites' according to Andra 1855
- 'Podocarpites ushioi belongs to Podocarpites' according to Naito 1956
- 'Podocarpites ushioi is recombined as Minetaxites ushioi' according to Kon'no 1962
- 'Podocarpophyllum belongs to Plantae'
- 'Podocarpophyllum singulare belongs to Podocarpophyllum' according to Gomolitzky 1962
- 'Podocarpoxylon belongs to Coniferophyta'
- 'Podocarpoxylon juniperoides belongs to Podocarpoxylon' according to Gothan 1905
- 'Podocarpoxylon woburnense belongs to Podocarpoxylon' according to Stopes 1915
- 'Podocarpoxylon woburnense is recombined as Mesembrioxylon woburnense' according to Seward 1919
- 'Podocarya belongs to Pandanaceae'
- 'Podocarya bucklandi belongs to Podocarya' according to Goeppert 1848
- 'Podogonium belongs to Caesalpinaceae'
- 'Podogonium knorrii belongs to Podogonium' according to Heer 1859
- 'Podoloma belongs to Polypodiaceae'
- 'Podostachys belongs to Monocotyledonae'
- 'Podostachys bureauana belongs to Podostachys' according to Marion 1872
- 'Podostemon belongs to Plantae'
- 'Podostemon ceratophylloides belongs to Podostemon' according to Unger 1853
- 'Podostemonites belongs to Podostemaceae'
- 'Podostemonites corrollatus belongs to Podostemonites' according to Szafer 1952
- 'Podostemonopsis belongs to Podostemaceae'
- 'Podostemonopsis tertiaria belongs to Podostemonopsis' according to Weyland 1938
- 'Podozamites barklyi belongs to Podozamites' according to McCoy 1874
- 'Podozamites barklyi is recombined as Bellarinea barklyi' according to Florin 1952
- 'Podozamites striatus belongs to Podozamites' according to Velenovsky 1885
- 'Podozamites striatus is recombined as Dammarophyllum striatum' according to Velenovsky 1889
- 'Poecilitocaulon belongs to Plantae'
- 'Poecilitocaulon dubium belongs to Poecilitocaulon' according to Fliche 1910
- 'Poecilitostachys belongs to Plantae'
- 'Poecilitostachys haugi belongs to Poecilitostachys' according to Fliche 1910
- 'Poecilophycus belongs to Plantae'
- 'Poecilophycus multiformis belongs to Poecilophycus' according to Korde 1954
- 'Poeciloxylon belongs to Plantae'
- 'Poeciloxylon proprium belongs to Poeciloxylon' according to Grand'Eury 1877
- 'Poikilofusa belongs to Acritarcha'
- 'Poikilofusa spinata belongs to Poikilofusa' according to Staplin et al. 1965
- 'Polioexolobus belongs to Asclepiadaceae'
- 'Poludia belongs to Problematica'
- 'Poludia polymorpha belongs to Poludia' according to Raaben 1964
- 'Polycarpella belongs to Plantae'
- 'Polycarpella caespitosa belongs to Polycarpella' according to Reid and Chandler 1933
- 'Polycladolithus belongs to Plantae'
- 'Polycladolithus operosus belongs to Polycladolithus' according to Deflandre 1954
- 'Polycuppes belongs to Problematica'
- 'Polycuppes dichothamnoides belongs to Polycuppes' according to Wetzel 1951
- 'Polyedrosphaeridium belongs to Acritarcha'
- 'Polyedrosphaeridium hidusense belongs to Polyedrosphaeridium' according to Timofeev 1962
- 'Polyedryxium belongs to Dinophyceae'
- 'Polyedryxium deflandrei belongs to Polyedryxium' according to Deunff 1954
- 'Polygonella incrustata belongs to Polygonella' according to Elliott 1957
- 'Polygonites belongs to Polygonaceae'
- 'Polygonites ulmaceus belongs to Polygonites' according to Saporta 1865
- 'Polygonocarpum belongs to Polygonaceae'
- 'Polygonocarpum fimbriatum belongs to Polygonocarpum' according to Weyland 1938
- 'Polygonocarpus belongs to Plantae'
- 'Polygonocarpus czarnockii belongs to Polygonocarpus' according to Zalessky 1907
- 'Polygonosphaerites belongs to Problematica'
- 'Polylophospermum belongs to Plantae'
- 'Polylophospermum stephanense belongs to Polylophospermum' according to Brongniart 1874
- 'Polymorphocodium belongs to Codiaceae'
- 'Polymorphocodium lapparenti belongs to Polymorphocodium' according to Derville 1931
- 'Polymorphopteris belongs to Filicinae'
- 'Polymorphopteris polymorpha belongs to Polymorphopteris' according to Brongniart 1958
- 'Polypodiolites belongs to Cycadophyta'
- 'Polypodiolites pectiniformis belongs to Polypodiolites' according to Sternberg 1823
- 'Polypodites belongs to Pteridophyta'
- 'Polyporaceae belongs to Basidiomycota'
- 'Polyporasclerotes belongs to Fungi'
- 'Polyporasclerotes hageni belongs to Polyporasclerotes' according to Stach and Pickhardt 1957
- 'Polyporites belongs to Polyporaceae'
- 'Polyporites bowmanni belongs to Polyporites' according to Lindley and Hutton 1833
- 'Polypterocarpus belongs to Plantae'
- 'Polypterocarpus caudatus belongs to Polypterocarpus' according to Grand'Eury 1877
- 'Polypterospermum belongs to Plantae'
- 'Polypterospermum renaultii belongs to Polypterospermum' according to Brongniart 1874
- 'Polysiphonides belongs to Problematica'
- 'Polysiphonides koechlini belongs to Polysiphonides' according to Heer 1869
- 'Polysolenoxylon belongs to Gymnospermophyta'
- 'Polysolenoxylon whitei belongs to Polysolenoxylon' according to Maniero 1958
- 'Polysorites belongs to Plantae'
- 'Polysporia is a nomen nudum'
- 'Polyssaievia belongs to Plantae'
- 'Polyssaievia spinulifolia belongs to Polyssaievia' according to Zalessky 1956
- 'Polystephanephorus belongs to Dinophyceae'
- 'Polystephanephorus calathus belongs to Polystephanephorus' according to Sarjeant 1961
- 'Polystephanosphaera belongs to Dinophyceae'
- 'Polystephanosphaera valensii belongs to Polystephanosphaera' according to Sarjeant 1960
- 'Polystichites belongs to Pteridophyta'
- 'Polystigmites belongs to Fungi'
- 'Polystigmites priscus belongs to Polystigmites' according to Massalongo 1892
- 'Polytheca belongs to Plantae'
- 'Polytheca belongs to Pteridophyta'
- 'Polytheca desaillyi belongs to Polytheca' according to Zeiller 1900
- 'Polytheca elongata belongs to Polytheca' according to Pant and Nautiyal 1960
- 'Polytrichites belongs to Polytrichidae'
- 'Polytrichites belongs to Polytrichidae'
- 'Polytrichites aichiense belongs to Polytrichites' according to Yasui 1928
- 'Polytrichites spokanensis belongs to Polytrichites' according to Britton 1926
- 'Polytripa belongs to Plantae'
- 'Polytripa elongata belongs to Polytripa' according to Defrance 1825
- 'Polyxylon belongs to Psilophytophyta'
- 'Polyxylon elegans belongs to Polyxylon' according to Read and Campbell 1939
- 'Pomaderrites belongs to Rhamnaceae'
- 'Pomaderrites banksii belongs to Pomaderrites' according to Ettingshausen 1883
- 'Pomoxylon belongs to Rosaceae'
- 'Pondicherria belongs to Magnoliopsida'
- 'Pondicherria ebenaleoidea belongs to Pondicherria' according to Sahni 1933
- 'Pontederites belongs to Pontederiaceae'
- 'Pontederites hesperia belongs to Pontederites' according to Knowlton 1922
- 'Populites belongs to Angiospermae'
- 'Populites belongs to Salicaceae'
- 'Populites phaetonis belongs to Populites' according to Viviani 1833
- 'Populites platyphyllus belongs to Populites' according to Goeppert 1852
- 'Populocaulis belongs to Salicaceae'
- 'Populocaulis yezoensis belongs to Populocaulis' according to Stopes and Fujii 1910
- 'Populophyllum belongs to Salicaceae'
- 'Populophyllum reniforme belongs to Populophyllum' according to Fontaine 1889
- 'Porochara belongs to Characeae'
- 'Porodendron belongs to Plantae'
- 'Porodendron tenerrimum belongs to Porodendron' according to Auerbach and Trautschold 1909
- 'Porostrobus belongs to Lycopodophyta'
- 'Porostrobus zeilleri belongs to Porostrobus' according to Nathorst 1914
- 'Porosus belongs to Medullosaceae'
- 'Porosus communis belongs to Porosus' according to Cotta 1832
- 'Poroxylon belongs to Cordaitales'
- 'Poroxylon boysseti belongs to Poroxylon' according to Renault 1879
- 'Portelia belongs to Problematica'
- 'Portelia meunieri belongs to Portelia' according to Boursault 1889
- 'Portnallia belongs to Cornaceae'
- 'Portnallia bognorensis belongs to Portnallia' according to Chandler 1961
- 'Potamocarpites belongs to Plantae'
- 'Potamogenites belongs to Plantae'
- 'Potamogenites vivianii belongs to Potamogenites' according to Goeppert 1848
- 'Potamogetophyllum belongs to Potamogetonaceae'
- 'Potamogetophyllum vernonensis belongs to Potamogetophyllum' according to Fontaine 1905
- 'Potamophyllites belongs to Plantae'
- 'Potamophyllites multinervis belongs to Potamophyllites' according to Brongniart 1828
- 'Pothocites belongs to Angiospermae'
- 'Pothocites grantonii belongs to Pothocites' according to Paterson 1844
- 'Pothocitopsis belongs to Plantae'
- 'Pothocitopsis bertilii belongs to Pothocitopsis' according to Nathorst 1914
- 'Potoniea belongs to Pteridospermophyta'
- 'Potoniea adiantiformis belongs to Potoniea' according to Zeiller 1899
- 'Pouterlabatia belongs to Sapotaceae'
- 'Praearenaria belongs to Problematica'
- 'Praearenaria bullulata belongs to Praearenaria' according to Vologdin 1962
- 'Praechara belongs to Charophyta'
- 'Praechara maedleri belongs to Praechara' according to Horn af Rantzien 1954
- 'Praechara maedleri is recombined as Stenochara maedleri' according to Grambast 1962
- 'Praechara symmetrica belongs to Praechara' according to Peck 1957
- 'Praechara symmetrica is recombined as Mesochara symmetrica' according to Grambast 1962
- 'Praedeparia belongs to Polypodiaceae'
- 'Praedeparia banatica belongs to Praedeparia' according to Stur 1921
- 'Pramelreuthia belongs to Cycadophyta'
- 'Pramelreuthia haberfelneri belongs to Pramelreuthia' according to Krasser 1918
- 'Prattia glandulosa belongs to Prattia' according to d'Archiac 1850
- 'Preissites belongs to Marchantiophyta'
- 'Preissites wardii [misspelled as Preissites wardi] belongs to Preissites'
- 'Preissites wardii is corrected as Preissites wardi and belongs to Preissites' according to Knowlton 1894
- 'Preissleria belongs to Plantae'
- 'Preissleria antiqua belongs to Preissleria' according to Presl 1838
- 'Premnophyllum belongs to Verbenaceae'
- 'Premnophyllum trigonum belongs to Premnophyllum' according to Velenovsky 1884
- 'Premnoxylon belongs to Cordaitales'
- 'Premnoxylon iowense belongs to Premnoxylon' according to Pierce and Hall 1953
- 'Prepecopteris belongs to Filicinae'
- 'Prepinus belongs to Coniferales'
- 'Prepinus statenensis belongs to Prepinus' according to Jeffrey 1908
- 'Prepinus viticetensis belongs to Prepinus' according to Jeffrey 1910
- 'Primaraucaria belongs to Araucariaceae'
- 'Primaraucaria wielandi belongs to Primaraucaria' according to Bock 1954
- 'Primicorallina belongs to Plantae'
- 'Primicorallina trentonensis belongs to Primicorallina' according to Whitfield 1894
- 'Prionotes belongs to Plantae'
- 'Priscogalea belongs to Dinophyceae'
- 'Priscogalea barbara belongs to Priscogalea' according to Deunff 1961
- 'Priscotheca belongs to Acritarcha'
- 'Priscotheca raia belongs to Priscotheca' according to Deunff 1961
- 'Pritchardia belongs to Plantae'
- 'Pritchardia insignis belongs to Pritchardia' according to Unger 1842
- 'Pritchardites belongs to Plantae'
- 'Pritchardites wettinioides belongs to Pritchardites' according to Bureau 1896
- 'Proaraucaria belongs to Araucariaceae'
- 'Proaraucaria mirabilis belongs to Proaraucaria' according to Wieland 1935
- 'Proaulopora belongs to Plantae'
- 'Proaulopora rarissima belongs to Proaulopora' according to Vologdin 1962
- 'Problematospermum belongs to Plantae'
- 'Problematospermum ovale belongs to Problematospermum' according to Turutanova-Ketova 1930
- 'Prochondrites belongs to Plantae'
- 'Prochondrites bifidus belongs to Prochondrites' according to Fritsch 1908
- 'Progymnospermopsida belongs to Tracheophyta'
- 'Prolepidodendron belongs to Lycopodophyta'
- 'Prolepidodendron breviinternodium belongs to Prolepidodendron' according to Arnold 1939
- 'Prolithospermum belongs to Boraginaceae'
- 'Prolithospermum johnstoni belongs to Prolithospermum' according to Elias 1942
- 'Propalmophyllum belongs to Plantae'
- 'Propalmophyllum liasinum belongs to Propalmophyllum' according to Lignier 1895
- 'Prosseria belongs to Plantae'
- 'Prosseria grandis belongs to Prosseria' according to Read 1953
- 'Protamyris belongs to Burseraceae'
- 'Protamyris eocenica belongs to Protamyris' according to Unger 1850
- 'Protannularia belongs to Equisetales'
- 'Protannularia harknessii belongs to Protannularia' according to Nicholson 1880
- 'Protasolanus belongs to Lycopodophyta'
- 'Protasolanus wieprechti belongs to Protasolanus' according to Hoerich 1920
- 'Proteacites belongs to Plantae'
- 'Proteacites pinnatipartitus belongs to Proteacites' according to Caspary 1882
- 'Proteaephyllum belongs to Proteaceae'
- 'Proteaephyllum californicum belongs to Proteaephyllum' according to Fontaine 1905
- 'Proteaephyllum reniforme belongs to Proteaephyllum' according to Fontaine 1889
- 'Proteoides grevilliaeformis belongs to Proteoides' according to Heer 1866
- 'Proteoides ilicoides belongs to Proteoides' according to Heer 1871
- 'Proteoides ilicoides is recombined as Protohedycarya ilicoides' according to Rueffle 1965
- 'Proteophyllum belongs to Plantae'
- 'Proteophyllum belongs to Angiospermae'
- 'Proteophyllum bipinnatum belongs to Proteophyllum' according to Friedrich 1883
- 'Proteophyllum paucidentatum belongs to Proteophyllum' according to Velenovsky 1889
- 'Proteopsis belongs to Angiospermae'
- 'Proteopsis proserpinae belongs to Proteopsis' according to Velenovsky 1889
- 'Proteotites belongs to Plantae'
- 'Proteoxylon belongs to Proteaceae'
- 'Proteoxylon chargeense belongs to Proteoxylon' according to Kraeusel 1939
- 'Protoacerophyllum belongs to Plantae'
- 'Protoacerophyllum perfoliatum belongs to Protoacerophyllum' according to Romanova 1960
- 'Protoaltingia belongs to Hamamelidaceae'
- 'Protoaltingia europaea belongs to Protoaltingia' according to Reid and Chandler 1933
- 'Protoarchaeosacculina belongs to Acritarcha'
- 'Protoarchaeosacculina atava belongs to Protoarchaeosacculina' according to Naumova 1960
- 'Protoascon belongs to Ascomycota'
- 'Protoascon missouriensis belongs to Protoascon' according to Batra et al. 1964
- 'Protoatherospermoxylon belongs to Monimiaceae'
- 'Protoatherospermoxylon renniei belongs to Protoatherospermoxylon' according to Maedel 1960
- 'Protobarclaya belongs to Nymphaeaceae'
- 'Protobarclaya eocenica belongs to Protobarclaya' according to Reid and Chandler 1933
- 'Protobarinophyton belongs to Plantae'
- 'Protobarinophyton obrutschevii belongs to Protobarinophyton' according to Ananiev 1955
- 'Protoblechnum belongs to Pteridophyta'
- 'Protobrachyoxylon belongs to Coniferophyta'
- 'Protobrachyoxylon eboracense belongs to Protobrachyoxylon' according to Holden 1913
- 'Protocalamites belongs to Calamitaceae'
- 'Protocalamostachys belongs to Equisetales'
- 'Protocalamostachys arranensis belongs to Protocalamostachys' according to Walton 1949
- 'Protocedroxylon belongs to Coniferophyta'
- 'Protocedroxylon araucarioides belongs to Protocedroxylon' according to Gothan 1910
- 'Protocephalopteris praecox belongs to Protocephalopteris' according to Hoeg 1960
- 'Protocladus is a nomen nudum'
- 'Protoclepsydropsis belongs to Coenopteridales'
- 'Protocommiphora belongs to Burseraceae'
- 'Protocommiphora europaea belongs to Protocommiphora' according to Reid and Chandler 1933
- 'Protocridosphaeridium belongs to Acritarcha'
- 'Protocridosphaeridium elandi belongs to Protocridosphaeridium' according to Timofeev 1962
- 'Protocupressinoxylon belongs to Coniferophyta'
- 'Protocyathea belongs to Plantae'
- 'Protocyathea trichinopoliensis belongs to Protocyathea' according to Feistmantel 1877
- 'Protodammara belongs to Araucariaceae'
- 'Protodammara speciosa belongs to Protodammara' according to Hollick and Jeffrey 1906
- 'Protodaphne belongs to Plantae'
- 'Protodaphne delessii belongs to Protodaphne' according to Saporta 1865
- 'Protoficus belongs to Moraceae'
- 'Protoficus crenulata belongs to Protoficus' according to Saporta 1868
- 'Protohedycarya belongs to Monimiaceae'
- 'Protohyenia belongs to Plantae'
- 'Protohyenia janovii belongs to Protohyenia' according to Ananiev 1956
- 'Protojuniperoxylon belongs to Coniferophyta'
- 'Protolarix belongs to Pinales'
- 'Protoleiosphaeridium belongs to Acritarcha'
- 'Protoleiosphaeridium conglutinatum belongs to Protoleiosphaeridium' according to Timofeev 1956
- 'Protolepidodendraceae belongs to Plantae'
- 'Protolepidodendron belongs to Lycopodophyta'
- 'Protolepidodendron microphyllum is recombined as Guycampbellia microphylla' according to Hoskins and Cross 1951
- 'Protolepidodendron microphyllum belongs to Protolepidodendron' according to Read and Campbell 1939
- 'Protolepidodendron scharianum belongs to Protolepidodendron' according to Krejci 1880
- 'Protolepidodendron scharianum is recombined as Chauvinia scharyana' according to Stur 1882
- 'Protolepidodendropsis belongs to Plantae'
- 'Protolepidodendropsis frickei belongs to Protolepidodendropsis' according to Gothan and Zimmerman 1937
- 'Protolotus belongs to Rhamnaceae'
- 'Protolotus raincourtii belongs to Protolotus' according to Saporta 1865
- 'Protomyces belongs to Phycomycetes'
- 'Protomyces protogenes belongs to Protomyces' according to Smith 1884
- 'Protomyces protogenes is recombined as Protomycites protogenes' according to Meschinelli 1892
- 'Protomycites belongs to Phycomycetes'
- 'Protonemaphycus belongs to Plantae'
- 'Protonyssa belongs to Nyssaceae'
- 'Protonyssa bilocularis belongs to Protonyssa' according to Reid and Chandler 1933
- 'Protoosmundites belongs to Lycopodophyta'
- 'Protoosmundites wilsonii belongs to Protoosmundites' according to Andrews and Baxter 1948
- 'Protophyllocladoxylon belongs to Gymnospermophyta'
- 'Protophyllocladoxylon leuchsi belongs to Protophyllocladoxylon' according to Kraeusel 1939
- 'Protophyllocladus belongs to Coniferales'
- 'Protophyllum belongs to Angiospermae'
- 'Protopiceoxylon belongs to Coniferophyta'
- 'Protopiceoxylon extinctum belongs to Protopiceoxylon' according to Gothan 1907
- 'Protopinuxylon belongs to Coniferophyta'
- 'Protopitys belongs to Gymnospermophyta'
- 'Protopitys buchiana belongs to Protopitys' according to Goeppert 1850
- 'Protopodocarpoxylon belongs to Coniferophyta'
- 'Protopteridium belongs to Plantae'
- 'Protopteridium hostinense belongs to Protopteridium' according to Krejci 1880
- 'Protopteris belongs to Polypodiopsida'
- 'Protopteris punctata belongs to Protopteris' according to Sternberg 1838
- 'Protoravensara belongs to Lauraceae'
- 'Protoravensara sheppeyensis belongs to Protoravensara' according to Reid and Chandler 1933
- 'Protorchis belongs to Angiospermae'
- 'Protorchis monorchis belongs to Protorchis' according to Massalongo 1859
- 'Protorhipis buchii belongs to Protorhipis' according to Andrae 1855
- 'Protorivularia belongs to Cyanophyceae'
- 'Protorivularia onega belongs to Protorivularia' according to Butin 1959
- 'Protornithopteris belongs to Schizaeaceae'
- 'Protornithopteris fremonti belongs to Protornithopteris' according to Knowlton 1947
- 'Protosalvinia belongs to Plantae'
- 'Protosalvinia bilobata belongs to Protosalvinia' according to Clarke 1885
- 'Protosalvinia brasiliensis belongs to Protosalvinia' according to Dawson 1886
- 'Protosalvinia brasiliensis is recombined as Orvillea brasiliensis' according to Lang 1945
- 'Protosphagnum belongs to Bryophyta'
- 'Protosphagnum nervatum belongs to Protosphagnum' according to Neuburg 1958
- 'Protospiroxylon belongs to Coniferales'
- 'Protospiroxylon lusaticum belongs to Protospiroxylon' according to Lingelsheim 1929
- 'Protostigma belongs to Lycopodophyta'
- 'Protostigma sigillarioides belongs to Protostigma' according to Lesquereux 1877
- 'Prototamus belongs to Dioscoreaceae'
- 'Prototamus paucinervis belongs to Prototamus' according to Langeron 1899
- 'Prototaxites belongs to Plantae'
- 'Prototaxites logani belongs to Prototaxites' according to Dawson 1859
- 'Prototaxites logani is recombined as Nematophyton logani' according to Dawson 1888
- 'Prototaxites psygmophylloides belongs to Prototaxites' according to Kraeusel and Weyland 1930
- 'Prototaxites psygmophylloides is recombined as Germanophyton psygmophylloides' according to Hoeg 1942
- 'Protothamnopteris belongs to Coenopteridales'
- 'Protothamnopteris baldaufi belongs to Protothamnopteris' according to Beck 1920
- 'Prototrematosphaeridium belongs to Acritarcha'
- 'Prototrematosphaeridium holtedahli belongs to Prototrematosphaeridium' according to Timofeev 1962
- 'Protuberantia belongs to Plantae'
- 'Protuberantia vescicularis belongs to Protuberantia' according to Vologdin 1962
- 'Pruninium belongs to Plantae'
- 'Pruninium gummosum belongs to Pruninium' according to Platen 1908
- 'Pruniphyllum belongs to Rosaceae'
- 'Pruniphyllum prinoides belongs to Pruniphyllum' according to Weber 1948
- 'Prunoides belongs to Rosaceae'
- 'Prynadaeopteris belongs to Plantae'
- 'Prynadaeopteris karpovii belongs to Prynadaeopteris' according to Radchenko 1955
- 'Prynadaia belongs to Sphenopsida'
- 'Prynadaia madygenica belongs to Prynadaia' according to Sixtel 1956
- 'Psaliangium belongs to Peltaspermopsida'
- 'Psaliangium odontopteroides belongs to Psaliangium' according to Remy 1953
- 'Psalixochlaena belongs to Pteridophyta'
- 'Psammopteris belongs to Plantae'
- 'Psammopteris knorriaeformis belongs to Psammopteris' according to Eichwald 1861
- 'Psaroniocaulon belongs to Marattiaceae'
- 'Psaroniocaulon sulcatum belongs to Psaroniocaulon' according to Grand'Eury 1877
- 'Psaronites belongs to Marattiaceae'
- 'Psaronites renaulti belongs to Psaronites' according to Williamson 1875
- 'Psaronius belongs to Marattiaceae'
- 'Psaronius carbonifer is recombined as Eupsaronius carbonifer' according to Presl 1847
- 'Psaronius carbonifer belongs to Psaronius' according to Corda 1845
- 'Psaronius helmintholithus belongs to Psaronius' according to Sprengel 1832
- 'Psaronius speciosus belongs to Psaronius' according to Corda 1845
- 'Psaronius speciosus is recombined as Trimatopteris speciosa' according to Corda 1845
- 'Pseudadiantites belongs to Pteridophyta'
- 'Pseudadiantites sessilis belongs to Pseudadiantites' according to Roehl 1929
- 'Pseudoalethopteris belongs to Alethopteridae'
- 'Pseudoannularia belongs to Equisetales'
- 'Pseudoaraucaria belongs to Pinaceae'
- 'Pseudoaraucaria loppineti belongs to Pseudoaraucaria' according to Fliche 1896
- 'Pseudoaspidiophyllum belongs to Platanaceae'
- 'Pseudoaspidiophyllum platanoides belongs to Pseudoaspidiophyllum' according to Hollick 1930
- 'Pseudoasterophyllites belongs to Equisetales'
- 'Pseudoasterophyllites cretaceus belongs to Pseudoasterophyllites' according to Feistmantel 1887
- 'Pseudoasterophyllites vidali belongs to Pseudoasterophyllites' according to Zeiller 1902
- 'Pseudoasterophyllites vidali is recombined as Montsechia vidali' according to Teixeira 1954
- 'Pseudobaiera belongs to Sphenopteridae'
- 'Pseudobaiera mcintoshi belongs to Pseudobaiera' according to Matthew 1906
- 'Pseudobornia belongs to Calamitaceae'
- 'Pseudobornia ursina belongs to Pseudobornia' according to Nathorst 1894
- 'Pseudocallipteris belongs to Peltaspermales'
- 'Pseudoceratium belongs to Dinoflagellata'
- 'Pseudochaetetes champagnensis belongs to Pseudochaetetes' according to Peterhans 1929
- 'Pseudochondrites belongs to Plantae'
- 'Pseudocodium belongs to Plantae'
- 'Pseudocodium convolvens belongs to Pseudocodium' according to Praturlon 1964
- 'Pseudocordaites belongs to Pteridophyta'
- 'Pseudocotyledon belongs to Crassulaceae'
- 'Pseudocotyledon inquirendum belongs to Pseudocotyledon' according to Saporta 1893
- 'Pseudoctenis belongs to Cycadophyta'
- 'Pseudoctenis eathiensis belongs to Pseudoctenis' according to Richards 1911
- 'Pseudocycadeoidea belongs to Cycadophyta'
- 'Pseudocycadeoidea indica belongs to Pseudocycadeoidea' according to Aiyengar and Jacob 1952
- 'Pseudocycas belongs to Cycadophyta'
- 'Pseudocyclopteris belongs to Neuropteridae'
- 'Pseudodanaeopsis belongs to Pteridophyta'
- 'Pseudodanaeopsis reticulata belongs to Pseudodanaeopsis' according to Fontaine 1883
- 'Pseudodeflandrea belongs to Dinophyceae'
- 'Pseudodeflandrea gigantea belongs to Pseudodeflandrea' according to Alberti 1959
- 'Pseudoengelhardtia belongs to Plantae'
- 'Pseudoengelhardtia dacica belongs to Pseudoengelhardtia' according to Givulescu 1961
- 'Pseudoepimastopora pertunda belongs to Pseudoepimastopora' according to Endo 1960
- 'Pseudofrenelopsis felixi belongs to Pseudofrenelopsis' according to Nathorst 1893
- 'Pseudogeinitzia belongs to Coniferales'
- 'Pseudogeinitzia sequoiiformis belongs to Pseudogeinitzia' according to Hollick and Jeffrey 1909
- 'Pseudoginkgo belongs to Ginkgoales'
- 'Pseudoginkgo bohemica belongs to Pseudoginkgo' according to Velenovsky and Viniklar 1926
- 'Pseudogyroporella mizziaformis belongs to Pseudogyroporella' according to Endo 1959
- 'Pseudokussiella belongs to Problematica'
- 'Pseudokussiella aii belongs to Pseudokussiella' according to Krylov 1963
- 'Pseudolaricixylon belongs to Pinaceae'
- 'Pseudolaricixylon firmoides belongs to Pseudolaricixylon' according to Khudaiberdyev 1958
- 'Pseudomangrovia belongs to Plantae'
- 'Pseudomariopteris belongs to Medullosaceae'
- 'Pseudonyssa belongs to Nyssaceae'
- 'Pseudonyssa palmiformis belongs to Pseudonyssa' according to Kinkelin 1900
- 'Pseudoodontopteris belongs to Peltaspermaceae'
- 'Pseudopecopteris belongs to Pteropsida'
- 'Pseudopecopteris belongs to Pteropsida'
- 'Pseudopecopteris mazoniana belongs to Pseudopecopteris' according to Lesquereux 1880
- 'Pseudopezizites belongs to Plantae'
- 'Pseudopezizites derasmoi belongs to Pseudopezizites' according to Fiore 1931
- 'Pseudophragmites belongs to Plantae'
- 'Pseudophragmites arundinaceus belongs to Pseudophragmites' according to Saporta 1873
- 'Pseudopinus belongs to Coniferales'
- 'Pseudopinus wilkinsoni belongs to Pseudopinus' according to Ettingshausen 1886
- 'Pseudopolyporus belongs to Fungi'
- 'Pseudopolyporus carbonicus belongs to Pseudopolyporus' according to Hollick 1910
- 'Pseudoprotophyllum belongs to Platanaceae'
- 'Pseudoprotophyllum marginatum belongs to Pseudoprotophyllum' according to Hollick 1930
- 'Pseudopterophyllum belongs to Cycadophyta'
- 'Pseudopterophyllum cteniforme belongs to Pseudopterophyllum' according to Nathorst 1933
- 'Pseudoptilophyllum belongs to Cycadophyta'
- 'Pseudoptilophyllum titzei belongs to Pseudoptilophyllum' according to Krasser 1918
- 'Pseudorhipidopsis belongs to Plantae'
- 'Pseudorhipidopsis brevicaulis belongs to Pseudorhipidopsis' according to Kawasaki and Kon'no 1937
- 'Pseudorocella belongs to Chrysophyceae'
- 'Pseudorocella barbadensis belongs to Pseudorocella' according to Deflandre 1932
- 'Pseudosagenopteris belongs to Caytoniales'
- 'Pseudosalvinia belongs to Polypodiopsida'
- 'Pseudosalvinia dubia belongs to Pseudosalvinia' according to Piton 1940
- 'Pseudosclerocarya belongs to Anacardiaceae'
- 'Pseudosclerocarya lentiformis belongs to Pseudosclerocarya' according to Reid and Chandler 1933
- 'Pseudosigillaria belongs to Lycopodophyta'
- 'Pseudosphenopteris belongs to Sphenopteridae'
- 'Pseudosporochnus belongs to Psilophytales'
- 'Pseudosporochnus krejcii belongs to Pseudosporochnus' according to Potonie and Bernard 1903
- 'Pseudosporogonites belongs to Plantae'
- 'Pseudosporogonites hallei belongs to Pseudosporogonites' according to Stockmans 1948
- 'Pseudostromatopora belongs to Plantae'
- 'Pseudostromatopora rumana belongs to Pseudostromatopora' according to Simionescu 1926
- 'Pseudosyringodendron belongs to Sigillariaceae'
- 'Pseudotorellia belongs to Plantae'
- 'Pseudouralia belongs to Plantae'
- 'Pseudouralia sibirica belongs to Pseudouralia' according to Petrosjan 1962
- 'Pseudovoltzia belongs to Voltziales'
- 'Psilochara belongs to Charophyta'
- 'Psilochara undulata belongs to Psilochara' according to Dollfus and Fritel 1919
- 'Psilodendrion belongs to Psilophytophyta'
- 'Psilodendrion spinulosum belongs to Psilodendrion' according to Hoeg 1942
- 'Psilophytites belongs to Psilophytophyta'
- 'Psilophyton belongs to Psilophytales'
- 'Psilophyton condrusorum belongs to Psilophyton' according to Crepin 1874
- 'Psilophyton condrusorum is recombined as Rhacophyton condrusorum' according to Mourlon 1875
- 'Psilophyton princeps belongs to Psilophyton' according to Dawson 1859
- 'Psilophyton robustius belongs to Psilophyton' according to Dawson 1871
- 'Psilophyton robustius is recombined as Trimerophyton robustius' according to Hopping 1954
- 'Psilotiphyllum belongs to Psilophytophyta'
- 'Psilotiphyllum bifidum belongs to Psilotiphyllum' according to Geinitz 1891
- 'Psilotites belongs to Plantae'
- 'Psilotopsis belongs to Plantae'
- 'Psilotopsis racemosa belongs to Psilotopsis' according to Heer 1883
- 'Psychotriphyllum belongs to Rubiaceae'
- 'Psychotriphyllum attenuatum belongs to Psychotriphyllum' according to Deane 1902
- 'Psygmatopteris is a nomen nudum'
- 'Psygmocarpus belongs to Plantae'
- 'Psygmocarpus incertus belongs to Psygmocarpus' according to Susta 1932
- 'Psygmocladus belongs to Plantae'
- 'Psygmocladus lepidodendriformis belongs to Psygmocladus' according to Susta 1932
- 'Psygmophyllum belongs to Plantae'
- 'Psygmostrobophyllum belongs to Plantae'
- 'Psygmostrobophyllum incertus belongs to Psygmostrobophyllum' according to Susta 1932
- 'Psygmostrobus belongs to Plantae'
- 'Psygmostrobus lepidodendriformis belongs to Psygmostrobus' according to Susta 1932
- 'Psylophyllum belongs to Plantae'
- 'Psylophyllum amadokense belongs to Psylophyllum' according to Zalessky 1944
- 'Pteleacarpum belongs to Plantae'
- 'Pteleacarpum bronni belongs to Pteleacarpum' according to Weyland 1948
- 'Ptenostrobus belongs to Coniferales'
- 'Ptenostrobus nebrascensis belongs to Ptenostrobus' according to Lesquereux 1874
- 'Pteridites belongs to Pteridophyta'
- 'Pteridites staubii belongs to Pteridites' according to Tuzson 1914
- 'Pteridoleimma belongs to Pteridophyta'
- 'Pteridoleimma aneimiifolius belongs to Pteridoleimma' according to Schulze 1887
- 'Pteridoleimma aneimiifolius is recombined as Lygodites aneimiifolius' according to Schulze 1887
- 'Pteridoleimma elisabethae belongs to Pteridoleimma' according to Debey and Ettingshausen 1859
- 'Pteridopsis belongs to Alethopteridae'
- 'Pteridopsis plumosa belongs to Pteridopsis' according to Howse 1890
- 'Pteridorachis belongs to Pteridophyta'
- 'Pteridorachis striata belongs to Pteridorachis' according to Nathorst 1902
- 'Pteridospermaexylon belongs to Gymnospermophyta'
- 'Pteridospermaexylon theresiae belongs to Pteridospermaexylon' according to Greguss 1952
- 'Pteridotheca belongs to Pteridophyta'
- 'Pteridotheca williamsoni belongs to Pteridotheca' according to Scott 1907
- 'Pteridozamites belongs to Pteridospermophyta'
- 'Pteridozamites zamioides belongs to Pteridozamites' according to Bertrand 1929
- 'Pterigophycos belongs to Plantae'
- 'Pterigophycos spectabilis belongs to Pterigophycos' according to Massalongo 1858
- 'Pteris erosa belongs to Pteris' according to Lesquereux 1878
- 'Pteris erosa is recombined as Allantodiopsis erosa' according to Knowlton and Maxon 1919
- 'Pterispermostrobus belongs to Pteridospermophyta'
- 'Pterispermostrobus bifurcatus belongs to Pterispermostrobus' according to Stopes 1914
- 'Pterispermotheca belongs to Archaeopteridales'
- 'Pterobalanus belongs to Plantae'
- 'Pterobalanus texanus belongs to Pterobalanus' according to Berry 1922
- 'Pterocarpites belongs to Plantae'
- 'Pterocarpites antiquus belongs to Pterocarpites' according to Keferstein 1834
- 'Pterocarpoxylon belongs to Leguminosae'
- 'Pterocarpoxylon arambourgii belongs to Pterocarpoxylon' according to Boureau 1951
- 'Pterocaryopsis belongs to Juglandaceae'
- 'Pterocaryoxylon belongs to Plantae'
- 'Pterocaryoxylon pannonicum belongs to Pterocaryoxylon' according to Mueller-Stoll and Maedel 1960
- 'Pterocycadites is a nomen nudum'
- 'Pterocystidiopsis belongs to Acritarcha'
- 'Pterocystidiopsis stephaniana belongs to Pterocystidiopsis' according to Deflandre 1935
- 'Pterodictyon belongs to Plantae'
- 'Pterodictyon annulatum belongs to Pterodictyon' according to Unger 1856
- 'Pterodinium belongs to Dinophyceae'
- 'Pterodinium aliferum belongs to Pterodinium' according to Eisenack 1958
- 'Pteroma belongs to Pteridospermophyta'
- 'Pteroma thomasi belongs to Pteroma' according to Harris 1964
- 'Pteronilssonia belongs to Cycadophyta'
- 'Pteronilssonia gopalii belongs to Pteronilssonia' according to Pant and Mehra 1963
- 'Pteropetalum belongs to Plantae'
- 'Pteropetalum palaeogonum belongs to Pteropetalum' according to Menge 1858
- 'Pterophycus belongs to Fucales'
- 'Pterophycus plicatus belongs to Pterophycus' according to Herzer 1902
- 'Pterophyllum braunianum belongs to Pterophyllum' according to Göppert 1844
- 'Pterophyllum braunianum is recombined as Ctenophyllum braunianum' according to Schimper 1870
- 'Pterophyllum bronnii belongs to Pterophyllum' according to Schenk 1865
- 'Pterophyllum bronnii is recombined as Macropterygium bronnii' according to Schimper 1870
- 'Pterophyllum inconstans belongs to Pterophyllum' according to Goeppert 1867
- 'Pterophyllum inconstans is recombined as Anomozamites inconstans' according to Schimper 1870
- 'Pterorrachis ambigua belongs to Pterorrachis' according to Frenguelli 1942
- 'Pterospermites vagans belongs to Pterospermites' according to Heer 1859
- 'Pterospermopsimorpha belongs to Acritarcha'
- 'Pterospermopsimorpha kelar belongs to Pterospermopsimorpha' according to Timofeev 1962
- 'Pterospermopsis belongs to Acritarcha'
- 'Pterospermopsis danica belongs to Pterospermopsis' according to Wetzel 1952
- 'Pterospermopsis pelagica belongs to Pterospermopsis' according to Eisenack 1954
- 'Pterospermopsis pelagica is recombined as Thalassiphora pelagica' according to Eisenack and Gocht 1960
- 'Pterospermum belongs to Plantae'
- 'Pterospermum anglicum belongs to Pterospermum' according to Arber 1914
- 'Pterozamites belongs to Cycadophyta'
- 'Pteruchus belongs to Pteridospermophyta'
- 'Pterygopteris belongs to Polypodiopsida'
- 'Pterygopteris angelini belongs to Pterygopteris' according to Nathorst 1922
- 'Pterygospermum belongs to Plantae'
- 'Pterygospermum raniganjense belongs to Pterygospermum' according to Pant and Nautiyal 1960
- 'Ptilocarpus belongs to Plantae'
- 'Ptilocarpus bicornutus belongs to Ptilocarpus' according to Lesquereux 1870
- 'Ptilophyllum belongs to Cycadophyta'
- 'Ptilophyton belongs to Lycopodophyta'
- 'Ptilophyton thomasoni belongs to Ptilophyton' according to Dawson 1878
- 'Ptilorachis belongs to Plantae'
- 'Ptilorachis dubis belongs to Ptilorachis' according to Corda 1845
- 'Ptilotites belongs to Ichnofossils'
- 'Ptilozamites belongs to Cycadophyta'
- 'Ptilozamites nilssonii [misspelled as Ptilozamites nilssoni] belongs to Ptilozamites'
- 'Ptychocarpus belongs to Pteridophyta'
- 'Ptychocarpus hexastichus belongs to Ptychocarpus' according to Weiss 1869
- 'Ptychopteris belongs to Plantae'
- 'Ptychopteris macrodiscus belongs to Ptychopteris' according to Brongniart 1845
- 'Ptychotesta belongs to Plantae'
- 'Ptychotesta tenuis belongs to Ptychotesta' according to Brongniart 1874
- 'Ptychoxylon belongs to Cycadophyta'
- 'Ptychoxylon levyi belongs to Ptychoxylon' according to Renault 1896
- 'Puccinites belongs to Uredinales'
- 'Puccinites lanceolatus belongs to Puccinites' according to Ettingshausen 1853
- 'Pulvinosphaeridium belongs to Dinophyceae'
- 'Pulvinosphaeridium pulvinellum belongs to Pulvinosphaeridium' according to Eisenack 1954
- 'Punicites belongs to Plantae'
- 'Punicites hesperidum belongs to Punicites' according to Weber 1855
- 'Pursongia belongs to Glossopteridaceae'
- 'Pursongia amalitzkii belongs to Pursongia' according to Zalessky 1937
- 'Pustularia is a nomen nudum'
- 'Pustularia belongs to Plantae'
- 'Pustularia taeniata belongs to Pustularia' according to Vologdin 1955
- 'Putranjivoxylon belongs to Euphorbiaceae'
- 'Putranjivoxylon puratanam belongs to Putranjivoxylon' according to Ramanujam 1956
- 'Pychnophyllum is an objective synonym of Cordaites'
- 'Pycnois belongs to Plantae'
- 'Pycnolobium belongs to Leguminosae'
- 'Pycnolobium tetraspermum belongs to Pycnolobium' according to Saporta 1861
- 'Pycnophyllites belongs to Cordaitales'
- 'Pycnoporidium lobatum belongs to Pycnoporidium' according to Yabe and Toyama 1928
- 'Pycnoxylon belongs to Cordaitales'
- 'Pycnoxylon leptodesmon belongs to Pycnoxylon' according to Cribbs 1938
- 'Pyrenomycetae belongs to Ascomycota'
- 'Pythites belongs to Oomycota'
- 'Pythites disodilis belongs to Pythites' according to Pampaloni 1902
- 'Pyxolithus belongs to Problematica'
- 'Pyxolithus problematicus belongs to Pyxolithus' according to Deflandre 1954
- 'Quadrocladus belongs to Coniferales'
- 'Quadrocladus florini belongs to Quadrocladus' according to Maedler 1957
- 'Quercinium belongs to Plantae'
- 'Quercinium sabulosum belongs to Quercinium' according to Unger 1842
- 'Querciphyllum belongs to Fagaceae'
- 'Querciphyllum lonchitis belongs to Querciphyllum' according to Nathorst 1888
- 'Quercites belongs to Plantae'
- 'Quercites lobatus belongs to Quercites' according to Berger 1832
- 'Quercophyllum belongs to Casuarinaceae'
- 'Quercophyllum belongs to Fagaceae'
- 'Quercophyllum grossedentatum belongs to Quercophyllum' according to Fontaine 1889
- 'Quercoxylon belongs to Plantae'
- 'Quercoxylon cerris belongs to Quercoxylon' according to Hofmann 1929
- 'Quercus groenlandica belongs to Quercus' according to Heer 1868
- 'Quercus semialatus is recombined as Anisophyllum semialatum' according to Lesquereux 1874
- 'Quervainia belongs to Cycadophyta'
- 'Quervainia spectabilis belongs to Quervainia' according to Harris 1932
- 'Quinquefolium is replaced by Araliophyllum' according to Ettingshausen 1868
- 'Quisquilites belongs to Acritarcha'
- 'Quisquilites buckhornensis belongs to Quisquilites' according to Wilson and Urban 1963
- 'Rabdotus belongs to Plantae'
- 'Rabdotus verrucosus belongs to Rabdotus' according to Presl 1838
- 'Rachiopteris belongs to Plantae'
- 'Rachiopteris aspera belongs to Rachiopteris' according to Williamson 1874
- 'Rachiopteris cylindrica belongs to Rachiopteris' according to Williamson 1878
- 'Rachiopteris cylindrica is recombined as Psalixochlaena cylindrica' according to Holden 1960
- 'Rackovskia mongolica belongs to Rackovskia' according to Vologdin 1940
- 'Racoblastites belongs to Plantae'
- 'Racostromium belongs to Plantae'
- 'Radicites belongs to Plantae'
- 'Radicites capillacea belongs to Radicites' according to Lindley and Hutton 1893
- 'Radicopsis belongs to Plantae'
- 'Radicopsis pisana belongs to Radicopsis' according to Fucini 1938
- 'Radiculites belongs to Cordaitales'
- 'Radiculites belongs to Plantae'
- 'Radiculites luganicus belongs to Radiculites' according to Zalessky 1937
- 'Radiculites reticulatus belongs to Radiculites' according to Lignier 1906
- 'Radimskya belongs to Alismaceae'
- 'Radimskya trinervia belongs to Radimskya' according to Ettingshausen 1890
- 'Radiophyton belongs to Plantae'
- 'Radiophyton sixii belongs to Radiophyton' according to Meunier 1887
- 'Radiospermum belongs to Plantae'
- 'Radiospermum perpusillum belongs to Radiospermum' according to Lesquereux 1914
- 'Radix belongs to Problematica'
- 'Radix corrugatus belongs to Radix' according to Fritsch 1908
- 'Radstockia belongs to Coenopteridales'
- 'Radstockia sphenopteroides belongs to Radstockia' according to Kidston 1923
- 'Radulites is a nomen nudum'
- 'Rajmahalia belongs to Bennettitales'
- 'Rajmahalia paradoxa belongs to Rajmahalia' according to Sahni and Rao 1934
- 'Ramalinites is a nomen nudum'
- 'Ramicalamus belongs to Plantae'
- 'Ramicalamus dumosus belongs to Ramicalamus' according to Matthew 1906
- 'Ramularia belongs to Fungi'
- 'Ramularia oblongispora belongs to Ramularia' according to Caspary 1887
- 'Ramularia oblongispora is recombined as Ramularites oblongisporus' according to Pia 1927
- 'Ramularites belongs to Mucedinaceae'
- 'Ramulus belongs to Plantae'
- 'Ramulus rugosus belongs to Ramulus' according to Wanner 1889
- 'Raniganjia belongs to Equisetales'
- 'Rantzieniella belongs to Charophyta'
- 'Rantzieniella nitida belongs to Rantzieniella' according to Grambast 1962
- 'Ranunculaecarpus belongs to Plantae'
- 'Ranunculaecarpus quinquecarpellatus belongs to Ranunculaecarpus' according to Samylina 1960
- 'Ranunculites is a nomen nudum'
- 'Raphaelia belongs to Pteridophyta'
- 'Raphaelia neuropteroides belongs to Raphaelia' according to Debey and Ettingshausen 1859
- 'Raphidodinium belongs to Dinophyceae'
- 'Raphidodinium fucatum belongs to Raphidodinium' according to Deflandre 1936
- 'Raritania belongs to Coniferophyta'
- 'Raskyaechara belongs to Charophyta'
- 'Raskyella belongs to Charophyta'
- 'Raskyella peckii belongs to Raskyella' according to Grambast and Grambast 1954
- 'Raumeria belongs to Plantae'
- 'Raumeria schulziana belongs to Raumeria' according to Goeppert 1853
- 'Ravenalospermum belongs to Monocotyledonae'
- 'Ravenalospermum invertissimum belongs to Ravenalospermum' according to Saporta 1894
- 'Razumovskya belongs to Corallinales'
- 'Razumovskya uralica belongs to Razumovskya' according to Vologdin 1939
- 'Receptaculites neptuni belongs to Receptaculites' according to Defrance 1827
- 'Reimannia belongs to Psilophytophyta'
- 'Reimannia aldenense belongs to Reimannia' according to Arnold 1935
- 'Reimannia indianensis belongs to Reimannia' according to Read and Campbell 1939
- 'Reimanniopsis belongs to Psilophytophyta'
- 'Reinschia belongs to Plantae'
- 'Reinschia australis belongs to Reinschia' according to Bertrand and Renault 1893
- 'Renalcis belongs to Rhodophyta'
- 'Renalcis cibus belongs to Renalcis' according to Vologdin 1932
- 'Renaultia belongs to Pteridophyta'
- 'Renaultia belongs to Marattiaceae'
- 'Renaultia chaerophylloides belongs to Renaultia' according to Brongniart 1883
- 'Renaultia intermedia belongs to Renaultia' according to Renault 1883
- 'Restiacites belongs to Plantae'
- 'Restiacites pleiocaulis belongs to Restiacites' according to Saporta 1861
- 'Retephycus belongs to Chlorophyta'
- 'Retephycus globosus belongs to Retephycus' according to Johnson and Konishi 1956
- 'Reticulopitys belongs to Gymnospermophyta'
- 'Reticulopitys suevica belongs to Reticulopitys' according to Mueller-Stoll 1960
- 'Reticulopteris belongs to Peltaspermophyta'
- 'Reticulopteris belongs to Plantae'
- 'Reticulopteris coriacea belongs to Reticulopteris' according to Kirichkova 1960
- 'Reticulum belongs to Problematica'
- 'Retinodendron is replaced by Retinoxylon' according to Endlicher 1847
- 'Retinodendron belongs to Plantae'
- 'Retinodendron pityoides belongs to Retinodendron' according to Zenker 1833
- 'Retinodendron pityoides is recombined as Retinoxylon pityoides' according to Endlicher 1847
- 'Retinodendron rigolloti belongs to Retinodendron' according to Renault 1892
- 'Retinomastixia belongs to Cornaceae'
- 'Retinomastixia schultei belongs to Retinomastixia' according to Kirchheimer 1938
- 'Retinosporites belongs to Coniferophyta'
- 'Retinoxylon belongs to Coniferophyta'
- 'Retiofucus belongs to Plantae'
- 'Retiofucus extensus belongs to Retiofucus' according to Keeping 1882
- 'Retiphycus belongs to Problematica'
- 'Retiphycus hexagonale belongs to Retiphycus' according to Ulrich 1904
- 'Retisphaeridium belongs to Acritarcha'
- 'Retisphaeridium dichamerum belongs to Retisphaeridium' according to Staplin et al. 1965
- 'Reussia belongs to Pteridophyta'
- 'Rhabdocarpos belongs to Plantae'
- 'Rhabdocarpus is a misspelling of Rhabdocarpos'
- 'Rhabdocarpos tunicatus belongs to Rhabdocarpos' according to Goeppert and Berger 1848
- 'Rhabdochara belongs to Charophyta'
- 'Rhabdophyton belongs to Plantae'
- 'Rhabdophyton striatus belongs to Rhabdophyton' according to Danze-Corsin 1956
- 'Rhabdoporella bacillum belongs to Rhabdoporella' according to Stolley 1893
- 'Rhabdospermum belongs to Plantae'
- 'Rhabdospermum cyclocaryon belongs to Rhabdospermum' according to Seward 1917
- 'Rhabdosphaerites belongs to Coccolithophorales'
- 'Rhabdosphaerites conicus belongs to Rhabdosphaerites' according to Maslov 1956
- 'Rhabdotaenia belongs to Cycadopsida'
- 'Rhabdotocaulon belongs to Plantae'
- 'Rhabdotocaulon zeilleri belongs to Rhabdotocaulon' according to Fliche 1910
- 'Rhabdoxylon belongs to Pteridophyta'
- 'Rhabdoxylon dichotomum belongs to Rhabdoxylon' according to Holden 1960
- 'Rhachiopteris belongs to Pteridophyta'
- 'Rhachiopteris pinnata belongs to Rhachiopteris' according to Dawson 1862
- 'Rhacoglossum is a nomen nudum'
- 'Rhacophyllum belongs to Plantae'
- 'Rhacophyllum lactuca belongs to Rhacophyllum' according to Sternberg 1869
- 'Rhacopteridium belongs to Plantae'
- 'Rhacopteridium speciosum belongs to Rhacopteridium' according to Ettingshausen 1940
- 'Rhamnacinium belongs to Rhamnaceae'
- 'Rhamnacinium affine belongs to Rhamnacinium' according to Felix 1894
- 'Rhamnites multinervatus belongs to Rhamnites' according to Forbes 1851
- 'Rhamnophyllum belongs to Angiospermae'
- 'Rhamnophyllum languinosum belongs to Rhamnophyllum' according to Weyland 1943
- 'Rhamnospermum belongs to Rhamnaceae'
- 'Rhamnospermum bilobatum belongs to Rhamnospermum' according to Chandler 1925
- 'Rhenania belongs to Coniferales'
- 'Rhenania reichelti belongs to Rhenania' according to Schweitzer 1960
- 'Rhetinangium belongs to Pteridospermophyta'
- 'Rhetinangium arberi belongs to Rhetinangium' according to Gordon 1912
- 'Rhexoxylon africanum belongs to Rhexoxylon' according to Bancroft 1913
- 'Rhinantheaeides belongs to Plantae'
- 'Rhinantheaeides goeppertana belongs to Rhinantheaeides' according to Stiehler 1861
- 'Rhinipteris belongs to Marattiaceae'
- 'Rhinipteris concinna belongs to Rhinipteris' according to Presl 1931
- 'Rhipidiocladus belongs to Coniferales'
- 'Rhipidiocladus flabellata belongs to Rhipidiocladus' according to Prinada 1956
- 'Rhipidion belongs to Plantae'
- 'Rhipidion tyrganum belongs to Rhipidion' according to Zalessky 1937
- 'Rhipidopsis belongs to Ginkgophyta'
- 'Rhipidopsis ginkgoides belongs to Rhipidopsis' according to Schmalhausen 1879
- 'Rhiptozamites belongs to Cordaitales'
- 'Rhiptozamites goepperti belongs to Rhiptozamites' according to Schmalhausen 1879
- 'Rhizoalnoxylon belongs to Plantae'
- 'Rhizoalnoxylon inclusum belongs to Rhizoalnoxylon' according to Conwentz 1880
- 'Rhizocalamopitys belongs to Plantae'
- 'Rhizocarpites belongs to Marsileaceae'
- 'Rhizocarpites singularis belongs to Rhizocarpites' according to Heer 1878
- 'Rhizocaulon belongs to Gramineae'
- 'Rhizocaulon macrophyllum belongs to Rhizocaulon' according to Saporta 1861
- 'Rhizocedroxylon belongs to Coniferophyta'
- 'Rhizocedroxylon hoheneggeri belongs to Rhizocedroxylon' according to Felix 1882
- 'Rhizocordaites belongs to Cordaitales'
- 'Rhizocupressinoxylon belongs to Plantae'
- 'Rhizocupressinoxylon uniradiatum belongs to Rhizocupressinoxylon' according to Goeppert 1880
- 'Rhizodendron belongs to Pteridophyta'
- 'Rhizodendron oppoliense belongs to Rhizodendron' according to Goeppert 1865
- 'Rhizolithes belongs to Plantae'
- 'Rhizolithes palmatifidus belongs to Rhizolithes' according to Lesquereux 1860
- 'Rhizomites belongs to Plantae'
- 'Rhizomites moenanus belongs to Rhizomites' according to Geyler 1887
- 'Rhizomopsis belongs to Plantae'
- 'Rhizomopsis gemmifera belongs to Rhizomopsis' according to Gothan and Sze 1933
- 'Rhizomopteris belongs to Pteridophyta'
- 'Rhizomopteris lycopodioides belongs to Rhizomopteris' according to Schimper 1869
- 'Rhizomorphites belongs to Plantae'
- 'Rhizonium belongs to Plantae'
- 'Rhizonium orchideiforme belongs to Rhizonium' according to Corda 1845
- 'Rhizopalmoxylon belongs to Palmae'
- 'Rhizopalmoxylon belongs to Palmae'
- 'Rhizopalmoxylon glaseli belongs to Rhizopalmoxylon' according to Gothan 1942
- 'Rhizophagites belongs to Fungi'
- 'Rhizophidites belongs to Chytridiomycetes'
- 'Rhizophidites triassicus belongs to Rhizophidites' according to Daugherty 1941
- 'Rhizophorites belongs to Rhizophoraceae'
- 'Rhizophorites bombacaceus belongs to Rhizophorites' according to Bayer 1914
- 'Rhizophorocarpus belongs to Rhizophoraceae'
- 'Rhizophorocarpus dekapetalus belongs to Rhizophorocarpus' according to Velenovsky and Viniklar 1926
- 'Rhizophoroxylon belongs to Rhizophoraceae'
- 'Rhizophoroxylon blepharistemmoides belongs to Rhizophoroxylon' according to Hofmann 1944
- 'Rhizopterodendron belongs to Plantae'
- 'Rhizopterodendron oppoliense belongs to Rhizopterodendron' according to Goeppert 1881
- 'Rhizostaemis belongs to Plantae'
- 'Rhizotaxodioxylon belongs to Coniferophyta'
- 'Rhizotaxodioxylon palustre belongs to Rhizotaxodioxylon' according to Felix 1882
- 'Rhodea belongs to Sphenopteridae'
- 'Rhodea gutbieriana belongs to Rhodea' according to Presl 1838
- 'Rhodea gutbieriana is recombined as Paragonorrachis gutbieriana' according to Grand'Eury 1877
- 'Rhodea stachei belongs to Rhodea' according to Stur 1877
- 'Rhodea stachei is recombined as Paracalathiops stachei' according to Remy 1953
- 'Rhodeites belongs to Sphenopteridae'
- 'Rhodes patentissima belongs to Rhodes' according to Ettingshausen 1875
- 'Rhodes patentissima is recombined as Diplothmema patentissimum' according to Stur 1877
- 'Rhodomelaceae belongs to Ceramiales'
- 'Rhodomelites belongs to Plantae'
- 'Rhodomenites belongs to Plantae'
- 'Rhodomenites marginatus belongs to Rhodomenites' according to Miquel 1851
- 'Rhodymenites belongs to Plantae'
- 'Rhoidium belongs to Anacardiaceae'
- 'Rhoidium juglandinum belongs to Rhoidium' according to Unger 1850
- 'Rhoidium ungeri belongs to Rhoidium' according to Mercklin 1856
- 'Rhombodella belongs to Problematica'
- 'Rhombodella natans belongs to Rhombodella' according to Cookson and Eisenack 1962
- 'Rhombodinium belongs to Dinoflagellata'
- 'Rhombodinium draco belongs to Rhombodinium' according to Gocht 1955
- 'Rhoophyllum belongs to Angiospermae'
- 'Rhopalophyllum belongs to Plantae'
- 'Rhopalophyllum acuminatum belongs to Rhopalophyllum' according to Unger 1888
- 'Rhopalospermites belongs to Plantae'
- 'Rhopalospermites strangeaeformis belongs to Rhopalospermites' according to Saporta 1862
- 'Rhynchodiniopsis belongs to Dinophyceae'
- 'Rhynchodiniopsis aptiana belongs to Rhynchodiniopsis' according to Deflandre 1935
- 'Rhynchogoniopsis belongs to Plantae'
- 'Rhynchogoniopsis neocomiensis belongs to Rhynchogoniopsis' according to Neumann 1907
- 'Rhynchogonium belongs to Plantae'
- 'Rhynchogonium crassirostre belongs to Rhynchogonium' according to Heer 1876
- 'Rhynia belongs to Psilophytales'
- 'Rhynia gwynnevaughani belongs to Rhynia' according to Kidston and Lang 1917
- 'Rhyniella belongs to Myxophyceae'
- 'Rhyssophycus belongs to Plantae'
- 'Rhyssophycus embolus belongs to Rhyssophycus' according to Eichwald 1854
- 'Rhytidocaryon belongs to Menispermaceae'
- 'Rhytidocaryon wilkinsonii belongs to Rhytidocaryon' according to Mueller 1876
- 'Rhytidodendron belongs to Plantae'
- 'Rhytidodendron munitifolium belongs to Rhytidodendron' according to Boulay 1876
- 'Rhytidolepis belongs to Sigillariaceae'
- 'Rhytidolepis ocellata belongs to Rhytidolepis' according to Sternberg 1822
- 'Rhytidophloyos belongs to Lycopodophyta'
- 'Rhytidophloyos tenuis belongs to Rhytidophloyos' according to Corda 1845
- 'Rhytidotheca belongs to Plantae'
- 'Rhytidotheca lynchii belongs to Rhytidotheca' according to Mueller 1871
- 'Rhytisma belongs to Fungi'
- 'Rhytisma palaeoacerinum belongs to Rhytisma' according to Engelhardt 1885
- 'Rhytisma palaeoacerinum is recombined as Rhytismites palaeoacerinum' according to Meschinelli 1892
- 'Rhytismites belongs to Fungi'
- 'Rhytismopsis belongs to Fungi'
- 'Rhyzodendron belongs to Lycopodophyta'
- 'Rhyzodendron rossicum belongs to Rhyzodendron' according to Zalessky 1937
- 'Ricciopsis belongs to Hepaticae'
- 'Ricciopsis belongs to Ricciaceae'
- 'Ricciopsis florinii belongs to Ricciopsis' according to Lundblad 1954
- 'Ricciopsis obrutschevii belongs to Ricciopsis' according to Neuberg 1956
- 'Rienitsia belongs to Plantae'
- 'Rienitsia spathulata belongs to Rienitsia' according to Walkom 1932
- 'Rimnocladon belongs to Lycopodophyta'
- 'Rimnocladon minutum belongs to Rimnocladon' according to Zalessky 1930
- 'Rivularialithus belongs to Plantae'
- 'Rivularialithus herbidus belongs to Rivularialithus' according to Maslov 1955
- 'Rivularites belongs to Cyanophyceae'
- 'Rivularites repertus belongs to Rivularites' according to Fliche 1905
- 'Robertiae belongs to Plantae'
- 'Robertiae katangae belongs to Robertiae' according to Choubert 1932
- 'Robinioxylon belongs to Plantae'
- 'Robinioxylon zuriensis belongs to Robinioxylon' according to Falqui 1907
- 'Rodeites belongs to Plantae'
- 'Rodeites dakshini belongs to Rodeites' according to Sahni 1943
- 'Roemeria belongs to Plantae'
- 'Roemeria americana belongs to Roemeria' according to Unger 1852
- 'Rogersia belongs to Proteaceae'
- 'Rogersia longifolia belongs to Rogersia' according to Fontaine 1889
- 'Rohlfsia belongs to Angiospermae'
- 'Rohlfsia celastroides belongs to Rohlfsia' according to Schenk 1883
- 'Romeroites belongs to Coniferales'
- 'Romeroites argentinensis belongs to Romeroites' according to Spegazzini 1924
- 'Ronzocarpon belongs to Angiospermae'
- 'Ronzocarpon hians belongs to Ronzocarpon' according to Marion 1872
- 'Rosaceaeoxylon belongs to Rosaceae'
- 'Rosaceaeoxylon spireaeoides belongs to Rosaceaeoxylon' according to Schilkina 1956
- 'Rosasporina belongs to Fungi'
- 'Rosasporina armillaformis belongs to Rosasporina' according to Benes 1956
- 'Rosellinites belongs to Pyrenomycetae'
- 'Rosellinites belongs to Fungi'
- 'Rosellinites beyschlagii belongs to Rosellinites' according to Potonie 1893
- 'Rosenbuschia belongs to Plantae'
- 'Rosenbuschia schalchi belongs to Rosenbuschia' according to Sterzel 1895
- 'Rossellinia belongs to Fungi'
- 'Rossellinia congregata belongs to Rossellinia' according to Beck 1887
- 'Rossellinia congregata is recombined as Rosellinites congregatus' according to Meschinelli 1892
- 'Rossovites belongs to Plantae'
- 'Rossovites petchorensis belongs to Rossovites' according to Zalessky 1934
- 'Rosthornia belongs to Plantae'
- 'Rosthornia carinthiaca belongs to Rosthornia' according to Unger 1842
- 'Rothenbergia belongs to Plantae'
- 'Rothenbergia hollebenii belongs to Rothenbergia' according to Cotta 1843
- 'Rotodontiospermum belongs to Pteridospermophyta'
- 'Rotodontiospermum illinoense belongs to Rotodontiospermum' according to Arnold and Steidtmann 1937
- 'Rottia belongs to Angiospermae'
- 'Rottia incerta belongs to Rottia' according to Weyland 1943
- 'Rottnestia belongs to Dinophyceae'
- 'Rottnestia borussica belongs to Rottnestia' according to Cookson and Eisenack 1961
- 'Rotularia is a subjective synonym of Annularia'
- 'Rotularia marsileaefolia belongs to Rotularia' according to Sternberg 1825
- 'Rotundocarpus belongs to Plantae'
- 'Rotundocarpus striatus belongs to Rotundocarpus' according to Maithy 1965
- 'Rubiaceaecarpum belongs to Rubiaceae'
- 'Rubiaceaecarpum multicarpellare belongs to Rubiaceaecarpum' according to Menzel 1913
- 'Rubiaceocarpum belongs to Rubiaceae'
- 'Rubiaceocarpum markgrafi belongs to Rubiaceocarpum' according to Kraeusel 1939
- 'Rubiacites belongs to Plantae'
- 'Rubiacites asperuloides belongs to Rubiacites' according to Weber 1855
- 'Rubiaephyllum belongs to Plantae'
- 'Rubiaephyllum gaylussaciae belongs to Rubiaephyllum' according to Bayer 1893
- 'Rubidgea belongs to Glossopteridaceae'
- 'Rubiiphyllites is a nomen nudum'
- 'Rubioides belongs to Rubiaceae'
- 'Rubioides lignita belongs to Rubioides' according to Perkins 1904
- 'Rubioxylon belongs to Rubiaceae'
- 'Rubioxylon naucleoides belongs to Rubioxylon' according to Hofmann 1952
- 'Ruehleostachys belongs to Coniferales'
- 'Ruehleostachys pseudarticulatus belongs to Ruehleostachys' according to Roselt 1955
- 'Ruffordia belongs to Schizaeaceae'
- 'Rufloria typica belongs to Rufloria' according to Meyen 1963
- 'Ruflorinia belongs to Pteridophyta'
- 'Ruflorinia sierra belongs to Ruflorinia' according to Archangelsky 1963
- 'Rusophycus clavatus belongs to Rusophycus' according to Hall 1852
- 'Rutaceites belongs to Plantae'
- 'Rutaceites zaisanica belongs to Rutaceites' according to Ilyinskaia 1963
- 'Rutaecarpus belongs to Rutaceae'
- 'Rutaecarpus quadrilobus belongs to Rutaecarpus' according to Velenovsky and Viniklar 1926
- 'Rutaphyllum belongs to Rutaceae'
- 'Rutaphyllum trifoliatum belongs to Rutaphyllum' according to Berry 1930
- 'Rutaspermum belongs to Rutaceae'
- 'Rutoxylon belongs to Plantae'
- 'Rutoxylon corneti belongs to Rutoxylon' according to Boureau 1952
- 'Ruyschioxylon belongs to Plantae'
- 'Ruyschioxylon sumatrense belongs to Ruyschioxylon' according to Hofmann 1884
- 'Saaria belongs to Filicales'
- 'Saarodiscites belongs to Plantae'
- 'Saarodiscites guthoerli belongs to Saarodiscites' according to Hirmer 1940
- 'Saaropteris belongs to Plantae'
- 'Saaropteris guthoerli belongs to Saaropteris' according to Hirmer 1940
- 'Saarotheca belongs to Filicales'
- 'Saarotheca sphenopteroides belongs to Saarotheca' according to Remy 1953
- 'Sabalites belongs to Palmae'
- 'Sabalites oxyrhachis belongs to Sabalites' according to Saporta 1865
- 'Sabiocaulis belongs to Sabiaceae'
- 'Sabiocaulis sakuraii belongs to Sabiocaulis' according to Stopes and Fujii 1910
- 'Sabioxylon belongs to Sabiaceae'
- 'Sabioxylon francofurtense belongs to Sabioxylon' according to Maedler 1939
- 'Sabulia belongs to Angiospermae'
- 'Sabulia scottii belongs to Sabulia' according to Stopes 1913
- 'Saccharomycetes belongs to Fungi'
- 'Saccharomycetes devonicus belongs to Saccharomycetes' according to Gruess 1928
- 'Saccophycus belongs to Plantae'
- 'Saccophycus intortus belongs to Saccophycus' according to James 1879
- 'Saccopteris belongs to Pteridophyta'
- 'Saccopteris essinghi belongs to Saccopteris' according to Andrae 1883
- 'Sacheocladus belongs to Psilophytales'
- 'Sacheocladus ambiguus belongs to Sacheocladus' according to Zalessky 1937
- 'Sacheria belongs to Pteridophyta'
- 'Sacheria asplenioides belongs to Sacheria' according to Ettingshausen 1852
- 'Sachyogyrus belongs to Plantae'
- 'Sachyogyrus multifarius belongs to Sachyogyrus' according to Zalessky 1939
- 'Sagenaria is a subjective synonym of Lepidodendron'
- 'Sagenaria coelata belongs to Sagenaria' according to Brongniart 1822
- 'Sagenopteris elliptica is recombined as Pseudosagenopteris elliptica' according to Potonie 1900
- 'Sagenopteris rhoifolia belongs to Sagenopteris' according to Presl 1838
- 'Sagisma belongs to Alismataceae'
- 'Sagisma turgida belongs to Sagisma' according to Nikitin 1965
- 'Sagittaria victormasoni belongs to Sagittaria' according to Ward 1911
- 'Sahnia belongs to Pentoxylaceae'
- 'Sahnia nipaniensis belongs to Sahnia' according to Vishnu-Mittre 1953
- 'Sahnianthus belongs to Lythraceae'
- 'Sahnianthus parijai belongs to Sahnianthus' according to Sahni 1944
- 'Sahnioxylon belongs to Cycadophyta'
- 'Sahnipushpam belongs to Angiospermae'
- 'Sajania belongs to Rhodophyta'
- 'Sajania frondosa belongs to Sajania' according to Vologdin 1962
- 'Sakristrobus belongs to Plantae'
- 'Sakristrobus sahnii belongs to Sakristrobus' according to Jacob 1943
- 'Salairia belongs to Plantae'
- 'Salairia longifolia belongs to Salairia' according to Neuberg 1960
- 'Salicinium belongs to Salicaceae'
- 'Salicinium messinianum belongs to Salicinium' according to Pampaloni 1904
- 'Salicinium populinum belongs to Salicinium' according to Unger 1850
- 'Salicinoxylon belongs to Salicaceae'
- 'Salicinoxylon belongs to Angiospermae'
- 'Salicinoxylon biradiatum belongs to Salicinoxylon' according to Lignier 1907
- 'Salicinoxylon miocenicum belongs to Salicinoxylon' according to Kaiser 1880
- 'Saliciphyllum belongs to Salicaceae'
- 'Saliciphyllum belongs to Salicaceae'
- 'Saliciphyllum longifolium belongs to Saliciphyllum' according to Fontaine 1889
- 'Saliciphyllum succineum belongs to Saliciphyllum' according to Conwentz 1886
- 'Salicites belongs to Angiospermae'
- 'Salicites wahlbergii belongs to Salicites' according to Hisinger 1837
- 'Salicornites belongs to Plantae'
- 'Salicornites massalongoi belongs to Salicornites' according to Principi 1926
- 'Salpingoporella belongs to Dasycladaceae'
- 'Salpingoporella muehlbergii belongs to Salpingoporella' according to Lorenz 1918
- 'Salpingostoma belongs to Pteridospermophyta'
- 'Samaravectis belongs to Magnoliopsida'
- 'Samaravectis ovalis belongs to Samaravectis' according to Reid and Chandler 1926
- 'Samarella belongs to Dasycladaceae'
- 'Samarella setosa belongs to Samarella' according to Maslov and Kulik 1956
- 'Samaropsis scotica is recombined as Lyrasperma scotica' according to Long 1960
- 'Samaropsis scotica belongs to Samaropsis' according to Calder 1938
- 'Samaropsis ulmiformis belongs to Samaropsis' according to Goeppert 1864
- 'Samarospadix belongs to Cordaitales'
- 'Samarospadix pencillata belongs to Samarospadix' according to Neuburg 1948
- 'Samarospermum belongs to Plantae'
- 'Samarospermum moravicum belongs to Samarospermum' according to Helmhacker 1914
- 'Samlandia belongs to Dinophyceae'
- 'Samlandia chlamydophora belongs to Samlandia' according to Eisenack 1954
- 'Sanmiguelia belongs to Palmae'
- 'Sanmiguelia lewisi belongs to Sanmiguelia' according to Brown 1956
- 'Santaliaphyllites is a nomen nudum'
- 'Sapindiphyllum belongs to Sapindaceae'
- 'Sapindiphyllum dubium belongs to Sapindiphyllum' according to Nathorst 1888
- 'Sapindoidea belongs to Sapindaceae'
- 'Sapindoidea margaritifera belongs to Sapindoidea' according to Ludwig 1936
- 'Sapindoides belongs to Angiospermae'
- 'Sapindoides varius belongs to Sapindoides' according to Perkins 1904
- 'Sapindophyllum belongs to Sapindaceae'
- 'Sapindophyllum spinulosodentatum belongs to Sapindophyllum' according to Ettingshausen 1869
- 'Sapindopsis belongs to Sapindaceae'
- 'Sapindopsis cordata belongs to Sapindopsis' according to Fontaine 1889
- 'Sapindopsoxylon belongs to Sapindaceae'
- 'Sapindopsoxylon klitzingi belongs to Sapindopsoxylon' according to Pfeiffer and Heurn 1928
- 'Sapindospermum belongs to Sapindaceae'
- 'Sapindospermum ovoideum belongs to Sapindospermum' according to Reid and Chandler 1933
- 'Sapindostrobus belongs to Plantae'
- 'Sapindostrobus dubius belongs to Sapindostrobus' according to Ettingshausen 1886
- 'Sapindoxylon belongs to Sapindaceae'
- 'Sapindoxylon janssonii belongs to Sapindoxylon' according to Kraeusel 1922
- 'Saportaea salisburioides belongs to Saportaea' according to Fontaine and White 1880
- 'Saportaia belongs to Plantae'
- 'Saportanella belongs to Charophyta'
- 'Saportanella maslovi belongs to Saportanella' according to Grambast 1962
- 'Saportia striata belongs to Saportia' according to Squinabol 1891
- 'Sapotacites belongs to Sapotaceae'
- 'Sapotacites obovata belongs to Sapotacites' according to Velenovsky 1884
- 'Sapotacites obovata is recombined as Sapotophyllum obovatum' according to Velenovsky 1889
- 'Sapotacites sideroxyloides belongs to Sapotacites' according to Ettingshausen 1853
- 'Sapotaphyllites is a nomen nudum'
- 'Sapoteites belongs to Sapotaceae'
- 'Sapoteites ackneri belongs to Sapoteites' according to Andrae 1855
- 'Sapoticarpum belongs to Sapotaceae'
- 'Sapoticarpum rotundatum belongs to Sapoticarpum' according to Reid and Chandler 1933
- 'Sapotispermum belongs to Sapotaceae'
- 'Sapotispermum sheppeyense belongs to Sapotispermum' according to Reid and Chandler 1933
- 'Sapotophyllum belongs to Sapotaceae'
- 'Sapotoxylon belongs to Sapotaceae'
- 'Sapotoxylon guembelii belongs to Sapotoxylon' according to Felix 1882
- 'Sarcopteris belongs to Filicales'
- 'Sarcopteris bertrandi belongs to Sarcopteris' according to Renault 1883
- 'Sarcospermum belongs to Trigonocarpales'
- 'Sarcospermum ovale belongs to Sarcospermum' according to Deevers 1937
- 'Sarcostrobilus belongs to Araucariaceae'
- 'Sarcostrobilus paulini belongs to Sarcostrobilus' according to Fliche 1900
- 'Sarcotaxus belongs to Plantae'
- 'Sarcotaxus angulosus belongs to Sarcotaxus' according to Brongniart 1874
- 'Sardoa belongs to Plantae'
- 'Sardoa robitschekii belongs to Sardoa' according to Krasser 1920
- 'Sardykphyllum is a subjective synonym of Sphenophyllum'
- 'Sardykphyllum crassinervosum belongs to Sardykphyllum' according to Zalessky 1929
- 'Sargassites belongs to Fucales'
- 'Sargassites globifera belongs to Sargassites' according to Sternberg 1857
- 'Sargassites globifera is recombined as Bubulcia globifera' according to Massalongo 1857
- 'Sargassum belongs to Fucales'
- 'Sargassum septentrionale belongs to Sargassum' according to Brongniart 1828
- 'Sargassum septentrionale is recombined as Sargassites septentrionalis' according to Sternberg 1833
- 'Sarituma belongs to Plantae'
- 'Sarituma tarjanae belongs to Sarituma' according to Senkevich 1963
- 'Sarmatiella belongs to Cycadales'
- 'Sarmatiella brevifolia belongs to Sarmatiella' according to Prynada 1956
- 'Saropteris belongs to Sphenopteridae'
- 'Saropteris rossica belongs to Saropteris' according to Chirkova 1937
- 'Sassafras acutilobum belongs to Sassafras' according to Lesquereux 1874
- 'Sassafras acutilobum is recombined as Sassafrophyllum acutilobum' according to Velenovsky 1889
- 'Sassafras cretaceum belongs to Sassafras' according to Newberry 1863
- 'Sassafras cretaceum is recombined as Araliopsis cretacea' according to Berry 1911
- 'Sassafrophyllum belongs to Lauraceae'
- 'Sassendorfites belongs to Angiospermae'
- 'Sassendorfites benkerti belongs to Sassendorfites' according to Kuhn 1955
- 'Saururopsis belongs to Saururaceae'
- 'Saururopsis niponensis belongs to Saururopsis' according to Stopes and Fujii 1910
- 'Sausarospermum belongs to Plantae'
- 'Sausarospermum fermori belongs to Sausarospermum' according to Sahni and Srivastava 1940
- 'Saxegothopsis belongs to Podocarpaceae'
- 'Saxifragaceaecarpum belongs to Saxifragaceae'
- 'Saxifragaceaecarpum bifolliculare belongs to Saxifragaceaecarpum' according to Menzel 1913
- 'Saxifragispermum belongs to Saxifragaceae'
- 'Saxifragispermum spinosissimum belongs to Saxifragispermum' according to Reid and Chandler 1933
- 'Saxifragites belongs to Saxifragaceae'
- 'Saxifragites crenulatus belongs to Saxifragites' according to Ettingshausen 1869
- 'Saxonia belongs to Plantae'
- 'Saxonia microphylla belongs to Saxonia' according to Roselt 1962
- 'Sboromirskia belongs to Coniferophyta'
- 'Sboromirskia asiatica belongs to Sboromirskia' according to Zalessky 1936
- 'Scalites belongs to Plantae'
- 'Scapanites is a nomen nudum'
- 'Scapanophyllum belongs to Pteridophyta'
- 'Scapanophyllum sitzense belongs to Scapanophyllum' according to Zalessky 1929
- 'Scaphidopteris belongs to Filicales'
- 'Scaphidopteris gilliotti belongs to Scaphidopteris' according to Renault 1883
- 'Scapholithus belongs to Coccolithophorales'
- 'Scapina belongs to Plantae'
- 'Scapina cambrica belongs to Scapina' according to Pocta 1889
- 'Schafarzikia belongs to Plantae'
- 'Schafarzikia oligocaenica belongs to Schafarzikia' according to Tucson 1914
- 'Schafferia belongs to Plantae'
- 'Schafferia verrucana belongs to Schafferia' according to Fucini 1938
- 'Schafhautlia belongs to Angiospermae'
- 'Schafhautlia teisenbergensis belongs to Schafhautlia' according to Naegeli 1863
- 'Schematophora belongs to Problematica'
- 'Schematophora speciosa belongs to Schematophora' according to Deflandre and Cookson 1955
- 'Schidolepium belongs to Coniferales'
- 'Schidolepium gracile belongs to Schidolepium' according to Heer 1880
- 'Schilderia belongs to Plantae'
- 'Schilderia adamanica belongs to Schilderia' according to Daugherty 1934
- 'Schimperites is a nomen nudum'
- 'Schinoxylon belongs to Anacardiaceae'
- 'Schinoxylon actinoporosum belongs to Schinoxylon' according to Kruse 1954
- 'Schismatosphaeridium belongs to Acritarcha'
- 'Schismatosphaeridium perforatum belongs to Schismatosphaeridium' according to Staplin et al. 1965
- 'Schistostachyum belongs to Plantae'
- 'Schistostachyum thyrsoideum belongs to Schistostachyum' according to Schenk 1864
- 'Schizaeites belongs to Pteridophyta'
- 'Schizaeites angustus belongs to Schizaeites' according to Potonie 1893
- 'Schizaeopsis belongs to Schizaeaceae'
- 'Schizaeopsis expansa belongs to Schizaeopsis' according to Fontaine 1911
- 'Schizaeopteris belongs to Schizaeaceae'
- 'Schizaeopteris mesozoica belongs to Schizaeopteris' according to Stopes and Fujii 1910
- 'Schizeites is replaced by Olfersites' according to Guembel 1859
- 'Schizeites dichotomus belongs to Schizeites' according to Guembel 1859
- 'Schizeites dichotomus is recombined as Olfersites dichotomus' according to Guembel 1859
- 'Schizocystia belongs to Acritarcha'
- 'Schizodendron belongs to Pteridophyta'
- 'Schizodendron tuberculatum belongs to Schizodendron' according to Eichwald 1860
- 'Schizolepidella belongs to Marchantiophyta'
- 'Schizolepidella gracilis belongs to Schizolepidella' according to Halle 1913
- 'Schizolepis belongs to Coniferales'
- 'Schizolepis braunii belongs to Schizolepis' according to Schenk 1867
- 'Schizolepis liasokeuperinus belongs to Schizolepis' according to Braun 1847
- 'Schizomycetes belongs to Fungi'
- 'Schizoneuropsis belongs to Plantae'
- 'Schizoneuropsis belongs to Equisetales'
- 'Schizoneuropsis posthuma belongs to Schizoneuropsis' according to Richter 1906
- 'Schizoneuropsis tokuadi belongs to Schizoneuropsis' according to Yabe and Shimakura 1940
- 'Schizophyta belongs to Bacteria'
- 'Schizopodium belongs to Cycadophyta'
- 'Schizopodium belongs to Lycopodophyta'
- 'Schizopodium davidi belongs to Schizopodium' according to Harris 1929
- 'Schizopodium renaulti belongs to Schizopodium' according to Moriere 1888
- 'Schizopteris belongs to Polypodiopsida'
- 'Schizopteris anomala belongs to Schizopteris' according to Brongniart 1828
- 'Schizospermum belongs to Plantae'
- 'Schizospermum noeggerathi belongs to Schizospermum' according to Sternberg 1914
- 'Schizostachys belongs to Coenopteridales'
- 'Schizostachys frondosus belongs to Schizostachys' according to Grand'Eury 1877
- 'Schizotrichites belongs to Plantae'
- 'Schizotrichites ordoviciensis belongs to Schizotrichites' according to Starmach 1963
- 'Schizoxylon is a subjective synonym of Cladoxylon'
- 'Schizoxylon taeniatum belongs to Schizoxylon' according to Unger 1856
- 'Schleidenites belongs to Plantae'
- 'Schleidenites compositus belongs to Schleidenites' according to Unger 1842
- 'Schlotheimia is a subjective synonym of Asterophyllites'
- 'Schlotheimia arborescens belongs to Schlotheimia' according to Sternberg 1822
- 'Schmidites belongs to Leguminosae'
- 'Schmidites vasculosus belongs to Schmidites' according to Schleiden 1855
- 'Schmiedeliopsis belongs to Plantae'
- 'Schmiedeliopsis zirkelii belongs to Schmiedeliopsis' according to Felix 1822
- 'Schodackia belongs to Problematica'
- 'Schodackia biserialis belongs to Schodackia' according to Ruedemann 1942
- 'Schoepfia belongs to Schoepfiaceae'
- 'Schoepfia deueli belongs to Schoepfia' according to Janssen 1940
- 'Schoinophytum is a nomen nudum'
- 'Schopfiastrum belongs to Pteridospermophyta'
- 'Schopfiastrum decussatum belongs to Schopfiastrum' according to Andrews 1945
- 'Schopfitheca belongs to Pteridospermophyta'
- 'Schopfitheca boulayoides belongs to Schopfitheca' according to Delevoryas 1964
- 'Schreberoidea belongs to Oleaceae'
- 'Schreberoidea pyriformis belongs to Schreberoidea' according to Chesters 1957
- 'Schuguria belongs to Plantae'
- 'Schuguria ornata belongs to Schuguria' according to Chirkova-Zalesskaia 1957
- 'Schutzia belongs to Cordaitales'
- 'Schutzia anomala belongs to Schutzia' according to Geinitz 1863
- 'Sciadipteris belongs to Pteridophyta'
- 'Sciadipteris radnicensis belongs to Sciadipteris' according to Sternberg 1838
- 'Sciadisca belongs to Plantae'
- 'Sciadisca petchorensis belongs to Sciadisca' according to Zalessky 1934
- 'Sciadophyton belongs to Plantae'
- 'Sciadophyton steinmanni belongs to Sciadophyton' according to Kraeusel and Weyland 1930
- 'Sciadopityoxylon belongs to Taxodiaceae'
- 'Sciadopityoxylon vestuta belongs to Sciadopityoxylon' according to Schmalhausen 1879
- 'Sciadopitytes belongs to Taxodiaceae'
- 'Sciadopitytes linearis belongs to Sciadopitytes' according to Goeppert and Menge 1883
- 'Scirpitis belongs to Cyperaceae'
- 'Scitamineophyllum belongs to Scitamineae'
- 'Scitamineophyllum inflatum belongs to Scitamineophyllum' according to Weyland 1957
- 'Scitaminites is replaced by Cromyodendron' according to Presl 1938
- 'Scitaminites musaeformis belongs to Scitaminites' according to Sternberg 1825
- 'Scitaminites musaeformis is replaced by Cromyodendron radnicense' according to Presl 1838
- 'Scitaminophyton belongs to Scitamineae'
- 'Scleriocarya belongs to Cyperaceae'
- 'Scleriocarya tribrachteata belongs to Scleriocarya' according to Chandler 1963
- 'Sclerocelyphus belongs to Plantae'
- 'Sclerocelyphus oviformus belongs to Sclerocelyphus' according to Mamay 1954
- 'Sclerophyllina belongs to Pteridophyta'
- 'Sclerophyllina furcata belongs to Sclerophyllina' according to Heer 1864
- 'Sclerophylloides is replaced by Sclerophyllina' according to Heer 1864
- 'Scleropteridium belongs to Pteridophyta'
- 'Scleropteridium dahlianum belongs to Scleropteridium' according to Heer 1877
- 'Scleropteris belongs to Pteridophyta'
- 'Scleropteris is a subjective synonym of Botrychioxylon'
- 'Scleropteris illinoiensis belongs to Scleropteris' according to Andrews 1942
- 'Scleropteris pomelii belongs to Scleropteris' according to Saporta 1872
- 'Sclerothamnium belongs to Plantae'
- 'Sclerothamnium nitens belongs to Sclerothamnium' according to Airoldi 1936
- 'Sclerotites belongs to Plantae'
- 'Sclerotites acericola belongs to Sclerotites' according to Heer 1892
- 'Scolecolithus belongs to Ichnofossils'
- 'Scolecopteris belongs to Marattiaceae'
- 'Scolecopteris elegans belongs to Scolecopteris' according to Zenker 1837
- 'Scolithus belongs to Problematica'
- 'Scolithus linearis belongs to Scolithus' according to Hall 1847
- 'Scolopendrites belongs to Pteridophyta'
- 'Scolopendrites belongs to Plantae'
- 'Scolopendrites grossedentata belongs to Scolopendrites' according to Lesquereux 1854
- 'Scolopendrites jussieui belongs to Scolopendrites' according to Goeppert 1836
- 'Scolopioidea belongs to Bixaceae'
- 'Scolopioidea palaeocenica belongs to Scolopioidea' according to Langeron 1899
- 'Scoresbya belongs to Caytoniales'
- 'Scoresbya dentata belongs to Scoresbya' according to Harris 1932
- 'Scottiella is a subjective synonym of Medullosa'
- 'Scougouphyton belongs to Plantae'
- 'Scougouphyton abdallahense belongs to Scougouphyton' according to Termier and Termier 1950
- 'Scoyenia gracilis belongs to Scoyenia' according to White 1929
- 'Scriniocassis belongs to Dinophyceae'
- 'Scriniocassis weberi belongs to Scriniocassis' according to Gocht 1964
- 'Scriniodinium belongs to Dinophyceae'
- 'Scrophularina belongs to Scrophulariaceae'
- 'Scrophularina oblita belongs to Scrophularina' according to Heer 1859
- 'Scutellocladus belongs to Lycopodophyta'
- 'Scutellocladus variabilis belongs to Scutellocladus' according to Lele and Walton 1962
- 'Scutocordaites belongs to Cordaitales'
- 'Scutocordaites grandeuryi belongs to Scutocordaites' according to Renault and Zeiller 1885
- 'Scutum belongs to Glossopteridaceae'
- 'Scutum dutoitides belongs to Scutum' according to Plumstead 1952
- 'Scutum dutoitides is recombined as Hirsutum dutoitides' according to Plumstead 1958
- 'Scutum leslium belongs to Scutum' according to Plumstead 1952
- 'Scytophyllum belongs to Pteridophyta'
- 'Securinegoxylon belongs to Euphorbiaceae'
- 'Securinegoxylon biseriatum belongs to Securinegoxylon' according to Maedel 1962
- 'Sedgwickia belongs to Cycadophyta'
- 'Sedgwickia yuccoides belongs to Sedgwickia' according to Goeppert 1848
- 'Sedites is a subjective synonym of Geinitzia' according to Endlicher 1947
- 'Sedites rabenhorstii belongs to Sedites' according to Geinitz 1842
- 'Sedites rabenhorstii is replaced by Geinitzia cretacea' according to Endlicher 1847
- 'Selaginellites belongs to Lycopodophyta'
- 'Selaginellites suissei belongs to Selaginellites' according to Zeiller 1906
- 'Selaginites belongs to Lycopodophyta'
- 'Selaginites patens belongs to Selaginites' according to Brongniart 1828
- 'Selenocarpus belongs to Gleicheniaceae'
- 'Selenocarpus muensterianus belongs to Selenocarpus' according to Schenk 1866
- 'Selenochlaena belongs to Pteridophyta'
- 'Selenochlaena microrrhiza belongs to Selenochlaena' according to Corda 1845
- 'Selenopteris belongs to Coenopteridales'
- 'Selenopteris radnicensis belongs to Selenopteris' according to Corda 1845
- 'Seletonella belongs to Plantae'
- 'Seletonella mira belongs to Seletonella' according to Korde 1950
- 'Semapteris belongs to Lycopodophyta'
- 'Semapteris carinthiaca belongs to Semapteris' according to Unger 1870
- 'Semecarpites belongs to Anacardiaceae'
- 'Semecarpites linearifolius belongs to Semecarpites' according to Fritel 1912
- 'Semen belongs to Plantae'
- 'Semen trigonum belongs to Semen' according to Velenovsky and Viniklar 1927
- 'Semenites belongs to Plantae'
- 'Sendelia belongs to Angiospermae'
- 'Sendelia ratzeburgeana belongs to Sendelia' according to Goeppert and Berendt 1845
- 'Senftenbergia belongs to Schizaeaceae'
- 'Senftenbergia elegans belongs to Senftenbergia' according to Corda 1845
- 'Septorella belongs to Charophyta'
- 'Septorella brachycera belongs to Septorella' according to Grambast 1962
- 'Sequodium belongs to Taxodiaceae'
- 'Sequodium langsdorfii belongs to Sequodium' according to Nikitin 1965
- 'Sequoiopsis belongs to Coniferales'
- 'Sequoiopsis buvignieri belongs to Sequoiopsis' according to Saporta 1876
- 'Sequoioxylon belongs to Coniferales'
- 'Sequoioxylon belongs to Taxodiaceae'
- 'Sequoioxylon hondoense belongs to Sequoioxylon' according to Yasui 1928
- 'Sequoioxylon montanense belongs to Sequoioxylon' according to Torrey 1923
- 'Sequoipsis belongs to Coniferales'
- 'Sequoipsis perucensis belongs to Sequoipsis' according to Velenovsky and Viniklar 1926
- 'Sequoites belongs to Coniferales'
- 'Sequoiites is a misspelling of Sequoites'
- 'Serenopsis belongs to Palmae'
- 'Serenopsis kempii belongs to Serenopsis' according to Hollick 1893
- 'Serpentisclerotes belongs to Fungi'
- 'Serpentisclerotes communis belongs to Serpentisclerotes' according to Benes 1959
- 'Serrulacaulis belongs to Psilophytophyta'
- 'Serrulacaulis furcatus belongs to Serrulacaulis' according to Hueber 1961
- 'Sestrosphaera liasina belongs to Sestrosphaera' according to Pia 1920
- 'Sewardia belongs to Cycadophyta'
- 'Sewardia latifolia belongs to Sewardia' according to Zeiller 1900
- 'Sewardiella belongs to Plantae'
- 'Sewardiella verrucana belongs to Sewardiella' according to Fucini 1936
- 'Sewardiodendron belongs to Taxodiaceae'
- 'Sezannella belongs to Sterculiaceae'
- 'Sezannella major belongs to Sezannella' according to Viguier 1908
- 'Sezannia belongs to Angiospermae'
- 'Sezannia credneriaeformis belongs to Sezannia' according to Saporta 1865
- 'Shermanophycus belongs to Cyanophyceae'
- 'Shermanophycus gouldi belongs to Shermanophycus' according to Johnson 1940
- 'Shigaporella belongs to Plantae'
- 'Shigaporella exortina belongs to Shigaporella' according to Endo 1961
- 'Shirakia belongs to Pteridophyta'
- 'Shirakia bilobifolia belongs to Shirakia' according to Kawasaki 1934
- 'Shirakiopteris belongs to Plantae'
- 'Shirakiopteris kawasaki belongs to Shirakiopteris' according to Kon'no 1950
- 'Shoreoxylon belongs to Malvales'
- 'Shortensis belongs to Micropeltaceae'
- 'Shortensis memorabilis belongs to Shortensis' according to Dilcher 1965
- 'Shrubsolea belongs to Rutaceae'
- 'Shrubsolea jenkinsi belongs to Shrubsolea' according to Reid and Chandler 1933
- 'Shuklania belongs to Fungi'
- 'Shuklanthus belongs to Plantae'
- 'Shuklanthus superbum belongs to Shuklanthus' according to Verma 1958
- 'Siberiella belongs to Plantae'
- 'Siberiella belongs to Plantae'
- 'Siberiella aciculata belongs to Siberiella' according to Korde 1957
- 'Siberiella kosmovskii belongs to Siberiella' according to Radchenko 1955
- 'Siberiodendron belongs to Plantae'
- 'Siberiodendron elongatum belongs to Siberiodendron' according to Radchenko 1956
- 'Siderella belongs to Sphenophyllales'
- 'Siderella scotti belongs to Siderella' according to Read 1936
- 'Siderophyllum belongs to Sapotaceae'
- 'Siderophyllum glandulosum belongs to Siderophyllum' according to Kraeusel and Weyland 1959
- 'Sigillaria lepidodendrifolia belongs to Sigillaria' according to Brongniart 1836
- 'Sigillaria lepidodendrifolia is recombined as Mesosigillaria lepidodendrifolia' according to Weiss and Sterzel 1893
- 'Sigillaria monostigma belongs to Sigillaria' according to Lesquereux 1866
- 'Sigillaria monostigma is recombined as Pseudosigillaria monostigma' according to Grand'Eury 1877
- 'Sigillaria pachyderma belongs to Sigillaria' according to Brongniart 1836
- 'Sigillaria pachyderma is recombined as Pseudosyringodendron pachyderma' according to Grand'Eury 1890
- 'Sigillaria peltigera belongs to Sigillaria' according to Brongniart 1828
- 'Sigillaria peltigera is recombined as Stemmatopteris peltigera' according to Corda 1845
- 'Sigillaria scutellata belongs to Sigillaria' according to Brongniart 1822
- 'Sigillaria sternbergi is recombined as Pleuromeia sternbergi'
- 'Sigillaria vanuxemi belongs to Sigillaria' according to Goeppert 1852
- 'Sigillaria vanuxemi is recombined as Archaeosigillaria vanuxemi' according to Kidston 1901
- 'Sigillarioides belongs to Sigillariaceae'
- 'Sigillarioides radicans belongs to Sigillarioides' according to Lesquereux 1870
- 'Sigillariophyllum belongs to Sigillariaceae'
- 'Sigillariopsis belongs to Sigillariaceae'
- 'Sigillariopsis decaisnei belongs to Sigillariopsis' according to Renault 1879
- 'Sigillariostrobus belongs to Plantae'
- 'Sigillariostrobus bifidus belongs to Sigillariostrobus' according to Geinitz 1873
- 'Sigillodendron belongs to Plantae'
- 'Sigillodendron frondosum belongs to Sigillodendron' according to Goeppert 1889
- 'Signacularia belongs to Plantae'
- 'Signacularia noinskii belongs to Signacularia' according to Zalessky 1929
- 'Silesiopteris belongs to Pteridophyta'
- 'Sillimania belongs to Plantae'
- 'Sillimania texana belongs to Sillimania' according to Unger 1850
- 'Silphidium belongs to Plantae'
- 'Silphidium visianicum belongs to Silphidium' according to Massalongo 1853
- 'Simarouboxylon belongs to Simarubaceae'
- 'Simarubaceophyllum belongs to Simarubaceae'
- 'Simarubaceophyllum picrasmoides belongs to Simarubaceophyllum' according to Rueffle 1963
- 'Simarubaceoxylon belongs to Simarubaceae'
- 'Simarubaceoxylon mahurzari belongs to Simarubaceoxylon' according to Shallom 1959
- 'Simarubinium belongs to Simarubaceae'
- 'Simarubinium crystallophorum belongs to Simarubinium' according to Platen 1908
- 'Simarubites belongs to Simarubaceae'
- 'Simarubites eocenicus belongs to Simarubites' according to Berry 1930
- 'Simplotheca belongs to Pteridospermophyta'
- 'Simplotheca silesiaca belongs to Simplotheca' according to Remy and Remy 1955
- 'Simsangia belongs to Acritarcha'
- 'Simsangia trispinosa belongs to Simsangia' according to Baksi 1962
- 'Sinoctenis belongs to Cycadophyta'
- 'Sinoctenis grabauiana belongs to Sinoctenis' according to Sze 1931
- 'Siphodendron belongs to Plantae'
- 'Siphodendron girardoti belongs to Siphodendron' according to Saporta 1884
- 'Siphodictytes belongs to Plantae'
- 'Siphonema belongs to Problematica'
- 'Siphonema incrustans belongs to Siphonema' according to Bornemann 1886
- 'Siphonites heberti belongs to Siphonites' according to Saporta 1872
- 'Siphonothallus belongs to Plantae'
- 'Siphonothallus taeniatus belongs to Siphonothallus' according to Rothpletz 1896
- 'Sirmiodinium belongs to Dinophyceae'
- 'Sirodesmites belongs to Dematiaceae'
- 'Sirodesmium belongs to Fungi'
- 'Sirodesmium subgranulosum belongs to Sirodesmium' according to Renault 1899
- 'Sirodesmium subgranulosum is recombined as Sirodesmites subgranulosum' according to Pia 1927
- 'Sitholeya belongs to Coniferales'
- 'Sitholeya rajmahalensis belongs to Sitholeya' according to Vishnu-Mittre 1958
- 'Sitzia belongs to Pteridophyta'
- 'Sitzia klocki belongs to Sitzia' according to Zalessky 1930
- 'Sitzopteris belongs to Pteridophyta'
- 'Sitzopteris superba belongs to Sitzopteris' according to Zalessky 1930
- 'Sjogrenia belongs to Angiospermae'
- 'Sjogrenia crystallophora belongs to Sjogrenia' according to Felix 1894
- 'Skolithos linearis is recombined as Scolecolithus linearis' according to Goeppert 1852
- 'Sloaneaecarpum belongs to Elaeocarpaceae'
- 'Sloaneaecarpum eocenicum belongs to Sloaneaecarpum' according to Rasky 1962
- 'Sloaneopsis belongs to Plantae'
- 'Smeystersia belongs to Coniferales'
- 'Smeystersia minuta belongs to Smeystersia' according to Fraipont 1921
- 'Smilaceae is a subjective synonym of Liliaceae'
- 'Smilacites belongs to Plantae'
- 'Smilacites hastata belongs to Smilacites' according to Brongniart 1828
- 'Smilacophyllum belongs to Liliaceae'
- 'Smilacophyllum dubium belongs to Smilacophyllum' according to Weyland 1957
- 'Solanispermum belongs to Solanaceae'
- 'Solanispermum reniformis belongs to Solanispermum' according to Chandler 1957
- 'Solanites belongs to Solanaceae'
- 'Solanites brongniartii belongs to Solanites' according to Saporta 1862
- 'Soleniopsis belongs to Plantae'
- 'Soleniopsis linzoides belongs to Soleniopsis' according to Massalongo 1851
- 'Solenites belongs to Ginkgoales'
- 'Solenites furcatus belongs to Solenites' according to Lindley and Hutton 1837
- 'Solenites furcatus is recombined as Asterophyllum furcatum' according to Schimper 1869
- 'Solenites murrayana belongs to Solenites' according to Lindley and Hutton 1834
- 'Solenophyllum belongs to Plantae'
- 'Solenophyllum paleozoicum belongs to Solenophyllum' according to Maslov 1935
- 'Solenopitys belongs to Gymnospermophyta'
- 'Solenopitys paulistana belongs to Solenopitys' according to Kraeusel and Dolianiti 1958
- 'Solenoplasmium belongs to Plantae'
- 'Solenoporella jurassica belongs to Solenoporella' according to Brown 1908
- 'Solenostelopteris belongs to Pteridophyta'
- 'Solenostelopteris japonica belongs to Solenostelopteris' according to Kershaw 1910
- 'Solenostrobus belongs to Plantae'
- 'Solenoula belongs to Plantae'
- 'Solenoula psilophloeus belongs to Solenoula' according to Wood 1860
- 'Solenoxylon belongs to Gymnospermophyta'
- 'Solenoxylon wissi belongs to Solenoxylon' according to Kraeusel 1956
- 'Solisphaeridium belongs to Acritarcha'
- 'Somphospongia belongs to Cyanophyta'
- 'Somphospongia multiformis belongs to Somphospongia' according to Beede 1899
- 'Sonneratioxylon belongs to Sonneratiaceae'
- 'Sonneratioxylon prambachense belongs to Sonneratioxylon' according to Hofmann 1952
- 'Sophorites belongs to Plantae'
- 'Sorbariopsis belongs to Plantae'
- 'Sorbariopsis linearifolia belongs to Sorbariopsis' according to Andreanszky 1955
- 'Sorithamnion belongs to Corallinales'
- 'Sorocaulus belongs to Plantae'
- 'Sorocaulus czekanowskii belongs to Sorocaulus' according to Schmalhausen 1955
- 'Sorocladus belongs to Pteridophyta'
- 'Sorocladus stellatus belongs to Sorocladus' according to Lesquereux 1880
- 'Sorosaccus belongs to Plantae'
- 'Sorosaccus gracilis belongs to Sorosaccus' according to Harris 1935
- 'Sorotheca belongs to Plantae'
- 'Sorotheca crepini belongs to Sorotheca' according to Stur 1883
- 'Sparganilithes belongs to Sparganiaceae'
- 'Sparganilithes gemmatus belongs to Sparganilithes' according to Woodward 1879
- 'Sparganiocarpus belongs to Sparganiaceae'
- 'Sparganiocarpus terminalis belongs to Sparganiocarpus' according to Velenovsky and Viniklar 1929
- 'Sparganofilix belongs to Plantae'
- 'Sparganum belongs to Plantae'
- 'Sparganum maximum belongs to Sparganum' according to Unger 1856
- 'Sparthophycos belongs to Plantae'
- 'Spathites is a nomen nudum'
- 'Spathulopteris belongs to Sphenopteridae'
- 'Spathulopteris obovata belongs to Spathulopteris' according to Lindley and Hutton 1923
- 'Spegazzinites belongs to Hyphomycetes'
- 'Spegazzinites cruciformis belongs to Spegazzinites' according to Felix 1894
- 'Speirocarpus belongs to Plantae'
- 'Speirocarpus bartoneci belongs to Speirocarpus' according to Stur 1888
- 'Spencerites belongs to Lycopodophyta'
- 'Spencerites insignis belongs to Spencerites' according to Williamson 1897
- 'Spermatites belongs to Plantae'
- 'Spermatites crystallinus belongs to Spermatites' according to Pant 1958
- 'Spermatites crystallinus is recombined as Stephanostoma crystallinum' according to Pant and Nautiyal 1960
- 'Spermatites elongatus belongs to Spermatites' according to Miner 1935
- 'Spermatites tetrapterus belongs to Spermatites' according to Pant 1958
- 'Spermatites tetrapterus is recombined as Semenites tetrapterus' according to Pant and Nautiyal 1960
- 'Spermatocodon belongs to Plantae'
- 'Spermatocodon sewardi belongs to Spermatocodon' according to Thomas 1933
- 'Spermatostrobus belongs to Coniferales'
- 'Spermatostrobus suspectus belongs to Spermatostrobus' according to Velenovsky and Viniklar 1927
- 'Spermites belongs to Plantae'
- 'Spermites semialatus belongs to Spermites' according to Saporta 1889
- 'Spermolithus belongs to Pteridospermophyta'
- 'Spermolithus devonicus belongs to Spermolithus' according to Johnson 1917
- 'Spermopteris belongs to Pteridospermophyta'
- 'Sphaenophora belongs to Plantae'
- 'Sphaenophora crassa belongs to Sphaenophora' according to Massalongo 1851
- 'Sphaeranema belongs to Fungi'
- 'Sphaeranema curta belongs to Sphaeranema' according to Smith 1896
- 'Sphaereda belongs to Plantae'
- 'Sphaeriodes belongs to Icacinaceae'
- 'Sphaeriodes ventricosa belongs to Sphaeriodes' according to Bowerbank 1933
- 'Sphaeriopsis belongs to Fungi'
- 'Sphaerites belongs to Plantae'
- 'Sphaerites punctiformis belongs to Sphaerites' according to Unger 1850
- 'Sphaerococcides belongs to Plantae'
- 'Sphaerococcides cartilagineus belongs to Sphaerococcides' according to Unger 1869
- 'Sphaerococcites is replaced by Rhodymenites' according to Trevisan 1858
- 'Sphaerococcites ciliatus belongs to Sphaerococcites' according to Sternberg 1820
- 'Sphaerococcites ciliatus is recombined as Rhodymenites ciliatus' according to Trevisan 1858
- 'Sphaeronites is replaced by Polygonosphaerites' according to Roemer 1880
- 'Sphaeronites tessellatus belongs to Sphaeronites' according to Phillips 1841
- 'Sphaeronites tessellatus is recombined as Polygonosphaerites tessellatus' according to Roemer 1880
- 'Sphaerospermum belongs to Plantae'
- 'Sphaerostoma belongs to Pteridospermophyta'
- 'Sphaerostoma ovale belongs to Sphaerostoma' according to Williamson 1909
- 'Sphaerostrobus belongs to Podocarpaceae'
- 'Sphaerostrobus clandestinus belongs to Sphaerostrobus' according to Harris 1935
- 'Sphalmopteris belongs to Plantae'
- 'Sphallopteris is a misspelling of Sphalmopteris'
- 'Sphalmopteris mougeotii belongs to Sphalmopteris' according to Corda 1845
- 'Sphegophyllum belongs to Plantae'
- 'Sphegophyllum striatum belongs to Sphegophyllum' according to Zalessky 1939
- 'Sphegopteris belongs to Pteridophyta'
- 'Sphegopteris rugosa belongs to Sphegopteris' according to Zalessky 1939
- 'Sphenaspis belongs to Coniferales'
- 'Sphenaspis statenensis belongs to Sphenaspis' according to Hollick and Jeffrey 1909
- 'Sphenasterophyllites belongs to Plantae'
- 'Sphenasterophyllites diersburgensis belongs to Sphenasterophyllites' according to Sterzel 1907
- 'Sphenobaiera belongs to Ginkgophyta'
- 'Sphenobaiera spectabilis belongs to Sphenobaiera' according to Nathorst 1936
- 'Sphenocallipteris belongs to Plantae'
- 'Sphenocyclopteridium belongs to Plantae'
- 'Sphenocyclopteridium belgicum belongs to Sphenocyclopteridium' according to Stockmans 1948
- 'Sphenoglossum belongs to Plantae'
- 'Sphenolepidium belongs to Coniferales'
- 'Sphenolepidium sternbergianum belongs to Sphenolepidium' according to Dunker 1881
- 'Sphenolepis belongs to Coniferales'
- 'Sphenolithus belongs to Coccolithophorales'
- 'Sphenolithus radians belongs to Sphenolithus' according to Deflandre 1952
- 'Sphenophycus belongs to Plantae'
- 'Sphenophycus latifolius belongs to Sphenophycus' according to Hall 1912
- 'Sphenophyllites is replaced by Sphenophyllum' according to Koenig 1825
- 'Sphenophyllites emarginatus belongs to Sphenophyllites' according to Brongniart 1822
- 'Sphenophyllites emarginatus is recombined as Sphenophyllum emarginatum' according to Koenig 1825
- 'Sphenophyllostachys belongs to Sphenophyllales'
- 'Sphenophyllostrobus belongs to Plantae'
- 'Sphenophyllum fertile belongs to Sphenophyllum' according to Scott 1905
- 'Sphenophyllum fertile is recombined as Difurcosphenophyllum fertile' according to Lotsy 1909
- 'Sphenopteridium belongs to Pteridophyta'
- 'Sphaenopteris is a misspelling of Sphenopteris'
- 'Sphenopteris bohdanowiczi is recombined as Neurosphenopteris bohdanowiczi' according to Zalessky 1907
- 'Sphenopteris bohdanowiczi belongs to Sphenopteris' according to Zalessky 1907
- 'Sphenopteris cuneifolia belongs to Sphenopteris' according to Kutorga 1838
- 'Sphenopteris cuneifolia is recombined as Palamophyllum cuneifolium' according to Zalessky 1912
- 'Sphenopteris elegans belongs to Sphenopteris' according to Brongniart 1829
- 'Sphenopteris elegans is recombined as Cuneatopteris elegans' according to Potonie 1903
- 'Sphenopteris essinghii belongs to Sphenopteris' according to Andrae 1866
- 'Sphenopteris gutbieri belongs to Sphenopteris' according to Ettingshausen 1854
- 'Sphenopteris gutbieri is recombined as Rhodeites gutbieri' according to Nemejc 1937
- 'Sphenopteris integra belongs to Sphenopteris' according to Andrae 1849
- 'Sphenopteris integra is recombined as Pseudosphenopteris integra' according to Grand'Eury 1877
- 'Sphenopteris mantelli belongs to Sphenopteris' according to Brongniart 1829
- 'Sphenopteris mantelli is recombined as Cheilanthites mantelli' according to Goeppert 1836
- 'Sphenopteris nervosus belongs to Sphenopteris' according to Brongniart 1829
- 'Sphenopteris nervosus is recombined as Adiantides nervosus' according to Schimper 1869
- 'Sphenopteris pendulata is recombined as Acrangiophyllum pendulata' according to Mamay 1955
- 'Sphenopteris pendulata belongs to Sphenopteris' according to Lesley 1890
- 'Sphenopteris refracta belongs to Sphenopteris' according to Goeppert 1852
- 'Sphenopteris refracta is recombined as Volkelia refracta' according to Solms-Laubach 1896
- 'Sphenopteris tenella belongs to Sphenopteris' according to Brongniart 1829
- 'Sphenopteris tenella is recombined as Urnatopteris tenella' according to Kidston 1884
- 'Sphenopteris trichomanoides belongs to Sphenopteris' according to Brongniart 1829
- 'Sphenopteris trichomanoides is recombined as Rhodea trichomanoides' according to Presl 1838
- 'Sphenostrobus belongs to Sphenopsida'
- 'Sphenostrobus thompsonii belongs to Sphenostrobus' according to Levittan and Barghoorn 1948
- 'Sphenothallus angustifolius belongs to Sphenothallus' according to Hall 1847
- 'Sphenotheca belongs to Symplocaceae'
- 'Sphenotheca incurva belongs to Sphenotheca' according to Kirchheimer 1934
- 'Sphenoxylon belongs to Pteridospermophyta'
- 'Sphenozamia belongs to Plantae'
- 'Sphenozamia augustae belongs to Sphenozamia' according to Zwanziger 1872
- 'Sphenozamites belongs to Cycadophyta'
- 'Sphenozamites tener belongs to Sphenozamites' according to Compter 1883
- 'Sphenozamites tener is recombined as Apoldia tenera' according to Wesley 1958
- 'Spherites belongs to Dinophyceae'
- 'Spherites spinosus belongs to Spherites' according to Dijkstra 1949
- 'Sphinxia belongs to Sterculiaceae'
- 'Sphinxia ovalis belongs to Sphinxia' according to Reid and Chandler 1933
- 'Sphondylophyton belongs to Sphenopsida'
- 'Sphondylophyton hyenioides belongs to Sphondylophyton' according to Schultes and Dorf 1938
- 'Sphygmium is a nomen nudum'
- 'Sphyropteris belongs to Pteridophyta'
- 'Sphyropteris crepini belongs to Sphyropteris' according to Stur 1883
- 'Spilosphaerites belongs to Fungi'
- 'Spilosphaerites maculans belongs to Spilosphaerites' according to Massalongo 1857
- 'Spinidinium styloniferum belongs to Spinidinium' according to Cookson and Eisenack 1962
- 'Spiralia is a nomen nudum'
- 'Spirangium belongs to Problematica'
- 'Spirangium carbonaria belongs to Spirangium' according to Schimper 1870
- 'Spirematospermum belongs to Zingiberaceae'
- 'Spirematospermum wetzleri belongs to Spirematospermum' according to Heer 1925
- 'Spirochorda belongs to Plantae'
- 'Spirogyrites belongs to Plantae'
- 'Spirophyton typum belongs to Spirophyton' according to Hall 1863
- 'Spiropteris belongs to Plantae'
- 'Spiropteris miltoni belongs to Spiropteris' according to Brongniart 1869
- 'Spiroramma is a nomen nudum'
- 'Spiroxylon belongs to Plantae'
- 'Spiroxylon belongs to Coniferophyta'
- 'Spiroxylon africanum belongs to Spiroxylon' according to Walton 1925
- 'Spiroxylon ratzeburgii belongs to Spiroxylon' according to Hartig 1848
- 'Spondiaecarpon belongs to Anacardiaceae'
- 'Spondiaecarpum is a misspelling of Spondiaecarpon'
- 'Spondiaecarpon dubium belongs to Spondiaecarpon' according to Langeron 1899
- 'Spondicarya belongs to Anacardiaceae'
- 'Spondicarya trilocularis belongs to Spondicarya' according to Reid and Chandler 1933
- 'Spondiocarpus belongs to Plantae'
- 'Spondiocarpus verbeekii belongs to Spondiocarpus' according to Warburg 1897
- 'Spondylostrobus belongs to Coniferales'
- 'Spondylostrobus smythii belongs to Spondylostrobus' according to Mueller 1870
- 'Spongebria belongs to Problematica'
- 'Spongebria marthae belongs to Spongebria' according to Deflandre 1950
- 'Spongeliomorpha iberica belongs to Spongeliomorpha' according to de Saporta 1887
- 'Spongiasclerotes belongs to Fungi'
- 'Spongiasclerotes funginus belongs to Spongiasclerotes' according to Stach and Pickhardt 1957
- 'Spongillopsis belongs to Problematica'
- 'Spongillopsis dyatica belongs to Spongillopsis' according to Geinitz 1862
- 'Spongiophyton belongs to Thallophyta'
- 'Spongiostroma belongs to Rivulariaceae' according to Hirmer 1927
- 'Spongiostroma maeandrinum belongs to Spongiostroma' according to Guerich 1906
- 'Spongodinium belongs to Dinoflagellata'
- 'Spongodinium delitiense belongs to Spongodinium' according to Ehrenberg 1936
- 'Spongophycus belongs to Plantae'
- 'Spongophycus angaricus belongs to Spongophycus' according to Korde 1954
- 'Sporangiostrobus belongs to Plantae'
- 'Sporangiostrobus orzeschensis belongs to Sporangiostrobus' according to Bode 1928
- 'Sporangites belongs to Plantae'
- 'Sporangites papillata belongs to Sporangites' according to Dawson 1863
- 'Sporlederia is a nomen nudum'
- 'Sporlederia carbonaria belongs to Sporlederia' according to Schimper 1860
- 'Sporocarpon belongs to Plantae'
- 'Sporocarpon cellulosum belongs to Sporocarpon' according to Williamson 1878
- 'Sporocarpon ornatus belongs to Sporocarpon' according to Williamson 1880
- 'Sporocarpon ornatus is a subjective synonym of Physostoma elegans' according to Seward 1917
- 'Sporocystis belongs to Problematica'
- 'Sporocystis planus belongs to Sporocystis' according to Lesquereux 1880
- 'Sporogonites belongs to Bryophyta'
- 'Sporogonites exuberans belongs to Sporogonites' according to Halle 1916
- 'Sporolithes is a nomen nudum'
- 'Sporotrichites belongs to Fungi'
- 'Sporotrichites heterospermus belongs to Sporotrichites' according to Goeppert and Berendt 1845
- 'Squama belongs to Coniferales'
- 'Squama taxinoides belongs to Squama' according to Renault 1885
- 'Squamae is a nomen dubium'
- 'Squamopsis belongs to Plantae'
- 'Squamopsis modesta belongs to Squamopsis' according to Fucini 1938
- 'Squamularia belongs to Plantae'
- 'Squamularia cicatricosa belongs to Squamularia' according to Heer 1896
- 'Stabbarpia belongs to Coniferales'
- 'Stabbarpia serrulata belongs to Stabbarpia' according to Florin 1958
- 'Stachannularia belongs to Calamitales'
- 'Stachannularia tuberculata belongs to Stachannularia' according to Sternberg 1876
- 'Stachycarpites belongs to Coniferales'
- 'Stachycarpites projectus belongs to Stachycarpites' according to Ogura 1932
- 'Stachycarpus belongs to Phytolaccaceae'
- 'Stachycarpus eocenica belongs to Stachycarpus' according to Meunier 1898
- 'Stachyopitys preslii belongs to Stachyopitys' according to Schenk 1867
- 'Stachyotaxus belongs to Coniferales'
- 'Stachyotaxus septentrionalis belongs to Stachyotaxus' according to Agardh 1886
- 'Stachypteris belongs to Pteridophyta'
- 'Stachypteris litophylla belongs to Stachypteris' according to Saporta 1872
- 'Stachypteris spicans belongs to Stachypteris' according to Pomel 1849
- 'Stachyura belongs to Plantae'
- 'Stachyura spicata belongs to Stachyura' according to Velenovsky and Viniklar 1927
- 'Stamnostoma belongs to Pteridospermophyta'
- 'Stamnostoma huttonense belongs to Stamnostoma' according to Long 1960
- 'Stangerites mcclellandi belongs to Stangerites' according to Oldham and Morris 1863
- 'Stangerites mcclellandi is recombined as Taeniopteris mcclellandi' according to Sahni and Rao 1933
- 'Stangerites mcclellandi is recombined as Morrisia mcclellandi' according to Bose 1959
- 'Staphidiophora belongs to Ginkgophyta'
- 'Staphidiophora secunda belongs to Staphidiophora' according to Harris 1935
- 'Staphidoides belongs to Angiospermae'
- 'Staphidoides venosus belongs to Staphidoides' according to Lesquereux 1906
- 'Staphylopteris belongs to Pteridophyta'
- 'Staphylotheca belongs to Pteridospermophyta'
- 'Staphylotheca kilpatrickensis belongs to Staphylotheca' according to Smith 1962
- 'Staplinium belongs to Acritarcha'
- 'Staplinium hexaeder belongs to Staplinium' according to Jansonius 1962
- 'Statzia belongs to Angiospermae'
- 'Statzia divaricata belongs to Statzia' according to Wessel and Weber 1938
- 'Staubia belongs to Angiospermae'
- 'Staubia eriodendroides belongs to Staubia' according to Felix 1884
- 'Staurofucus belongs to Phaeophyceae'
- 'Staurofucus mirabilis belongs to Staurofucus' according to Radchenko 1956
- 'Staurophyton belongs to Plantae'
- 'Staurophyton bagnolensis belongs to Staurophyton' according to Meunier 1891
- 'Stauropteris belongs to Coenopteridales'
- 'Stauropteris oldhamia belongs to Stauropteris' according to Binney 1872
- 'Steffensia belongs to Pteridophyta'
- 'Steffensia davallioides belongs to Steffensia' according to Goeppert 1836
- 'Stegites belongs to Discomycetes'
- 'Stegites poacitum belongs to Stegites' according to Braun 1892
- 'Steinhauera belongs to Coniferales'
- 'Stelastellara belongs to Coenopteridales'
- 'Stelastellara parvula belongs to Stelastellara' according to Baxter 1965
- 'Steleopteris belongs to Plantae'
- 'Steleopteris angiopteroides belongs to Steleopteris' according to Goeppert 1865
- 'Stellasclerotes belongs to Fungi'
- 'Stellasclerotes spinosus belongs to Stellasclerotes' according to Benes 1959
- 'Stellatheca belongs to Osmundaceae'
- 'Stellatheca latiloba belongs to Stellatheca' according to J. Danzea 1956
- 'Stellatochara belongs to Charophyta'
- 'Stellatochara sellingii belongs to Stellatochara' according to Horn af Rantzien 1954
- 'Stellotheca belongs to Equisetaceae'
- 'Steloxylon belongs to Plantae'
- 'Stemmatopteris belongs to Sigillariaceae'
- 'Stenixys belongs to Desmidiaceae'
- 'Stenixys cosmarioides belongs to Stenixys' according to Harris 1938
- 'Stenocarpites belongs to Proteaceae'
- 'Stenocarpites anisolobus belongs to Stenocarpites' according to Brongniart 1861
- 'Stenochara belongs to Charophyta'
- 'Stenogrammiella belongs to Plantae'
- 'Stenogrammiella tomiensis belongs to Stenogrammiella' according to Radchenko 1962
- 'Stenogrammites belongs to Rhodophyta'
- 'Stenogrammites pseudocostata belongs to Stenogrammites' according to Kretschetovitsch 1936
- 'Stenokoleos belongs to Pteridospermophyta'
- 'Stenomischus belongs to Taxodiaceae'
- 'Stenomischus athrous belongs to Stenomischus' according to Harris 1935
- 'Stenomyelon belongs to Pteridospermophyta'
- 'Stenomyelon tuedianum belongs to Stenomyelon' according to Kidston 1909
- 'Stenonia belongs to Plantae'
- 'Stenonia ungeri belongs to Stenonia' according to Endlicher 1847
- 'Stenophragmium belongs to Plantae'
- 'Stenophycus belongs to Plantae'
- 'Stenophycus teichertii belongs to Stenophycus' according to Fenton 1943
- 'Stenophyllum belongs to Plantae'
- 'Stenophyllum uninervium belongs to Stenophyllum' according to Zalessky 1937
- 'Stenoporidium belongs to Plantae'
- 'Stenoporidium chaetetiformis belongs to Stenoporidium' according to Yabe and Toyama 1928
- 'Stenopteris belongs to Pteridospermophyta'
- 'Stenopteris desmomera belongs to Stenopteris' according to Saporta 1872
- 'Stenorhachis belongs to Coniferales'
- 'Stenorachis is a misspelling of Stenorhachis'
- 'Stenorrachis is a misspelling of Stenorhachis'
- 'Stenorhachis ponseleti belongs to Stenorhachis' according to Nathorst 1879
- 'Stenzelia belongs to Medullosaceae'
- 'Stenzelia elegans belongs to Stenzelia' according to Cotta 1864
- 'Stephanelytron redcliffense belongs to Stephanelytron' according to Sarjeant 1961
- 'Stephanida belongs to Plantae'
- 'Stephanida gracilis belongs to Stephanida' according to Unger 1856
- 'Stephanochara belongs to Charophyta'
- 'Stephanochara compta belongs to Stephanochara' according to Grambast 1959
- 'Stephanofilix belongs to Plantae'
- 'Stephanolithion belongs to Coccolithophorales'
- 'Stephanophyllum belongs to Ginkgophyta'
- 'Stephanophyllum solmsi belongs to Stephanophyllum' according to Seward 1936
- 'Stephanoradiocarpus belongs to Plantae'
- 'Stephanoradiocarpus bernissartensis belongs to Stephanoradiocarpus' according to Stockmans and Williere 1961
- 'Stephanospermum belongs to Plantae'
- 'Stephanospermum achenioides belongs to Stephanospermum' according to Brongniart 1874
- 'Stephanostemon belongs to Saxifragaceae'
- 'Stephanostemon brachyandra belongs to Stephanostemon' according to Caspary 1881
- 'Stephanostemon helmi belongs to Stephanostemon' according to Conwentz 1886
- 'Stephanostoma belongs to Plantae'
- 'Stephanoxylon belongs to Angiospermae'
- 'Stephanoxylon dubium belongs to Stephanoxylon' according to Felix 1882
- 'Stephodinium belongs to Dinophyceae'
- 'Sterculia limbata belongs to Sterculia' according to Velenovsky 1883
- 'Sterculia limbata is recombined as Sterculiphyllum limbatum' according to Nathorst 1886
- 'Sterculia vetustula belongs to Sterculia' according to Dawson 1885
- 'Sterculia vetustula is recombined as Sterculites vetustula' according to Dawson 1888
- 'Sterculiocarpus belongs to Sterculiaceae'
- 'Sterculiocarpus eocenicus belongs to Sterculiocarpus' according to Berry 1916
- 'Sterculioxylon belongs to Sterculiaceae'
- 'Sterculioxylon aegyptiacum belongs to Sterculioxylon' according to Unger 1939
- 'Sterculiphyllum belongs to Sterculiaceae'
- 'Sterculites belongs to Malvaceae'
- 'Stereocarpus belongs to Plantae'
- 'Stereocarpus emarginatus belongs to Stereocarpus' according to Surange 1958
- 'Stereophycus belongs to Plantae'
- 'Stereophycus borissiaki belongs to Stereophycus' according to Korde 1954
- 'Stereopteris belongs to Zygopteridaceae'
- 'Stereopteris annularis belongs to Stereopteris' according to Scott and Jeffrey 1914
- 'Sternbergia is replaced by Artisia' according to Sternberg 1838
- 'Sternbergia transversa belongs to Sternbergia' according to Artis 1825
- 'Sternbergia transversa is recombined as Artisia transversa' according to Sternberg 1838
- 'Sterzelia belongs to Plantae'
- 'Sterzelia nindeli belongs to Sterzelia' according to Gothan 1928
- 'Stewartiopteris belongs to Pteridophyta'
- 'Stewartiopteris singularis belongs to Stewartiopteris' according to Morgan and Delevoryas 1952
- 'Stichoporella belongs to Dasycladaceae'
- 'Stichostromium belongs to Plantae'
- 'Stichus mermisoides belongs to Stichus' according to Etheridge 1904
- 'Stictodictytes belongs to Plantae'
- 'Stictoplasmium belongs to Plantae'
- 'Stictosphaeridium belongs to Acritarcha'
- 'Stictosphaeridium podolense belongs to Stictosphaeridium' according to Timofeev 1962
- 'Stiehleria belongs to Plantae'
- 'Stiehleria simildae belongs to Stiehleria' according to Daber 1953
- 'Stigmaria belongs to Lycopodophyta'
- 'Stigmaria ficoides belongs to Stigmaria' according to Sternberg 1822
- 'Stigmariocarpum belongs to Plantae'
- 'Stigmarioides belongs to Plantae'
- 'Stigmarioides truncatus belongs to Stigmarioides' according to Lesquereux 1870
- 'Stigmariopsis belongs to Plantae'
- 'Stigmariopsis inaequalis belongs to Stigmariopsis' according to Grand'Eury 1877
- 'Stigmarites belongs to Plantae'
- 'Stigmarites nicklesi belongs to Stigmarites' according to Fliche 1903
- 'Stigmatiophyllum belongs to Plantae'
- 'Stigmatiophyllum lepidophylloides belongs to Stigmatiophyllum' according to Guembel 1859
- 'Stigmatocanna belongs to Plantae'
- 'Stigmatocanna volkmanniana belongs to Stigmatocanna' according to Goeppert 1852
- 'Stigmatodendron belongs to Plantae'
- 'Stigmatodendron ledebourii belongs to Stigmatodendron' according to Eichwald 1860
- 'Stigmophyton belongs to Plantae'
- 'Stigmophyton sturi belongs to Stigmophyton' according to Kraeusel and Weyland 1933
- 'Stilbites belongs to Fungi'
- 'Stilbum belongs to Fungi'
- 'Stilbum succini belongs to Stilbum' according to Caspary 1887
- 'Stilbum succini is recombined as Stilbites succini' according to Pia 1927
- 'Stipidium belongs to Gramineae'
- 'Stipidium minimum belongs to Stipidium' according to Elias 1942
- 'Stipitopteris belongs to Pteridophyta'
- 'Stipitopteris aequalis belongs to Stipitopteris' according to Grand'Eury 1877
- 'Stiptostromium belongs to Plantae'
- 'Stipulella belongs to Chroococcaceae'
- 'Stipulella fascicularis belongs to Stipulella' according to Maslov 1956
- 'Stizocarya belongs to Icacinaceae'
- 'Stizocarya communis belongs to Stizocarya' according to Reid and Chandler 1933
- 'Stolidermium belongs to Plantae'
- 'Stoliplasmium belongs to Plantae'
- 'Stolisphaerites belongs to Plantae'
- 'Stolites belongs to Plantae'
- 'Stolleya belongs to Plantae'
- 'Stomochara belongs to Charophyta'
- 'Storgaardia belongs to Coniferophyta'
- 'Storgaardia spectabilis belongs to Storgaardia' according to Harris 1935
- 'Stormbergia belongs to Filicales'
- 'Stormbergia gardneri belongs to Stormbergia' according to Seward 1911
- 'Straelenipteris belongs to Pteridophyta'
- 'Straelenipteris eocenica belongs to Straelenipteris' according to Stockmans 1936
- 'Strangerites belongs to Cycadopsida'
- 'Stratiotites belongs to Hydrocharitaceae'
- 'Stratiotites najadum belongs to Stratiotites' according to Heer 1855
- 'Strephopteris belongs to Pteridophyta'
- 'Strephopteris ambigua belongs to Strephopteris' according to Presl 1838
- 'Streptotrichites belongs to Fungi'
- 'Streptotrichites spiralis belongs to Streptotrichites' according to Berkeley 1892
- 'Striaestrobus belongs to Pinales'
- 'Striaestrobus bohemicus belongs to Striaestrobus' according to Velenovsky and Viniklar 1926
- 'Striatasclerotes belongs to Fungi'
- 'Striatasclerotes cicatricosus belongs to Striatasclerotes' according to Stach and Pickhardt 1957
- 'Stricklandia belongs to Plantae'
- 'Stricklandia acuminata belongs to Stricklandia' according to Buckman 1845
- 'Strihastomia belongs to Plantae'
- 'Strihastomia barthelii belongs to Strihastomia' according to Meyen 1965
- 'Strobilanthus belongs to Myricaceae'
- 'Strobilanthus cretaceus belongs to Strobilanthus' according to Velenovsky and Viniklar 1929
- 'Strobilites belongs to Coniferales'
- 'Strobilites elongata belongs to Strobilites' according to Lindley and Hutton 1833
- 'Strobilites laricoides belongs to Strobilites' according to Schimper and Mougeot 1844
- 'Strobilites laricoides is replaced by Fuchselia schimperi' according to Endlicher 1847
- 'Strobilostrobus belongs to Coniferales'
- 'Strobilostrobus velenovskyanus belongs to Strobilostrobus' according to Bayer 1914
- 'Strobilus belongs to Plantae'
- 'Strobilus caryophyllus belongs to Strobilus' according to Hildreth 1837
- 'Strzeleckia belongs to Neuropteridae'
- 'Sturia belongs to Sphenopteridae'
- 'Sturia amoena belongs to Sturia' according to Stur 1934
- 'Sturiella belongs to Filicinae'
- 'Sturiella belongs to Bennettitales'
- 'Sturiella langeri belongs to Sturiella' according to Kraeusel 1948
- 'Stychites belongs to Plantae'
- 'Stylocalamites belongs to Sphenophyllales'
- 'Stylocodium belongs to Codiaceae'
- 'Stylocodium rhopaloides belongs to Stylocodium' according to Derville 1931
- 'Stylodiniopsis belongs to Acritarcha'
- 'Stylodiniopsis maculatum belongs to Stylodiniopsis' according to Eisenack 1954
- 'Stylophycus belongs to Cyanophyceae'
- 'Stylophycus carbonarius belongs to Stylophycus' according to Johnson 1940
- 'Sublepidodendron belongs to Plantae'
- 'Sublepidodendron mirabile belongs to Sublepidodendron' according to Nathorst 1927
- 'Sublepidophloios belongs to Lycopodophyta'
- 'Sublepidophloios hagenbachensis belongs to Sublepidophloios' according to Sterzel 1907
- 'Subterraniphyllum belongs to Corallinaceae'
- 'Subtetrapedia belongs to Plantae'
- 'Subtetrapedia russiana belongs to Subtetrapedia' according to Renault 1899
- 'Subtifloria belongs to Rhodophyta'
- 'Subtifloria delicata belongs to Subtifloria' according to Maslov 1956
- 'Succodium belongs to Codiaceae'
- 'Succodium multipilularum belongs to Succodium' according to Konishi 1955
- 'Sueria belongs to Cycadopsida'
- 'Suevioxylon belongs to Angiospermae'
- 'Suevioxylon zonatum belongs to Suevioxylon' according to Kraeusel 1928
- 'Sugambrophyton belongs to Protolepidodendraceae'
- 'Sugambrophyton pilgeri belongs to Sugambrophyton' according to Schmidt 1954
- 'Sulcatisclerotes belongs to Fungi'
- 'Sulcatisclerotes compactus belongs to Sulcatisclerotes' according to Benes 1959
- 'Sulcocarpolithes belongs to Plantae'
- 'Sulcodipteris belongs to Plantae'
- 'Sumatroxylon belongs to Burseraceae'
- 'Supaia belongs to Pteridophyta'
- 'Supaia thinnfeldioides belongs to Supaia' according to White 1929
- 'Sutcliffia belongs to Medullosaceae'
- 'Sutcliffia insignis belongs to Sutcliffia' according to Scott 1906
- 'Sutivania belongs to Problematica'
- 'Sutivania likvae belongs to Sutivania' according to Radoicic 1959
- 'Suvorovella belongs to Plantae'
- 'Suvundukia belongs to Plantae'
- 'Suvundukia aciculata belongs to Suvundukia' according to Zalessky 1948
- 'Svalbardella belongs to Dinoflagellata'
- 'Svalbardella cooksoniae belongs to Svalbardella' according to Manum 1960
- 'Svalbardia belongs to Psilophytophyta'
- 'Svalbardia polymorpha belongs to Svalbardia' according to Hoeg 1942
- 'Swedenborgia belongs to Coniferales'
- 'Swedenborgia cryptomerides belongs to Swedenborgia' according to Nathorst 1876
- 'Swietenioxylon belongs to Plantae'
- 'Swietenioxylon sternbergense belongs to Swietenioxylon' according to Hofmann 1883
- 'Sycidium belongs to Sycidiales'
- 'Sycidium reticulatum belongs to Sycidium' according to Sandberger 1849
- 'Sycophyllum belongs to Plantae'
- 'Sycophyllum dentatum belongs to Sycophyllum' according to Schulze 1887
- 'Sylvella alata belongs to Sylvella' according to Zalessky 1937
- 'Sylvia belongs to Pteridophyta'
- 'Sylvia striata belongs to Sylvia' according to Zalessky 1937
- 'Sylvopteris belongs to Pteridophyta'
- 'Sylvopteris conspicua belongs to Sylvopteris' according to Zalessky 1937
- 'Symphonioxylon belongs to Plantae'
- 'Symphonioxylon stefaninii belongs to Symphonioxylon' according to Chiarugi 1933
- 'Symphorocarpophyllum belongs to Angiospermae'
- 'Symphorocarpophyllum albertum belongs to Symphorocarpophyllum' according to Dawson 1886
- 'Symphyoplasmium belongs to Plantae'
- 'Symplassosphaeridium is a nomen nudum'
- 'Symplocoides belongs to Symplocaceae'
- 'Symplocoxylon belongs to Plantae'
- 'Symplocoxylon latiporosum belongs to Symplocoxylon' according to Kraeusel and Schonfeld 1964
- 'Syncardia belongs to Cladoxylopsida'
- 'Syncardia pusilla belongs to Syncardia' according to Unger 1856
- 'Syncarpites belongs to Myrtaceae'
- 'Syncarpites ovalis belongs to Syncarpites' according to Schmalhausen 1883
- 'Syncrama belongs to Pteridospermophyta'
- 'Syncrama liratum belongs to Syncrama' according to Holden 1955
- 'Synia belongs to Pteridophyta'
- 'Synia perelegans belongs to Synia' according to Zalessky 1934
- 'Syniopteris belongs to Peltaspermales'
- 'Syniopteris nesterenkoi belongs to Syniopteris' according to Zalessky 1929
- 'Syntrisepalum belongs to Menispermaceae'
- 'Syntrisepalum auritum belongs to Syntrisepalum' according to Chesters 1957
- 'Syringodendron belongs to Sigillariaceae'
- 'Syringodendron organum belongs to Syringodendron' according to Sternberg 1820
- 'Syringoxylon belongs to Plantae'
- 'Syringoxylon mirabile belongs to Syringoxylon' according to Dawson 1862
- 'Systematophora belongs to Dinophyceae'
- 'Tabernaemontanophyllum belongs to Apocynaceae'
- 'Taenidium praecarbonicum belongs to Taenidium' according to Guembel 1879
- 'Taenidium praecarbonicum is recombined as Volubilites praecarbonicus' according to Liburnau 1901
- 'Taenidium serpentinum belongs to Taenidium' according to Heer 1877
- 'Taeniocrada belongs to Plantae'
- 'Taeniocrada lesquereuxi belongs to Taeniocrada' according to White 1902
- 'Taeniophora belongs to Dinophyceae'
- 'Taeniophora iunctispina belongs to Taeniophora' according to Klement 1960
- 'Taeniophycus belongs to Plantae'
- 'Taeniophycus liasicus belongs to Taeniophycus' according to Schimper 1869
- 'Taeniophyllum belongs to Cordaitales'
- 'Taeniophyllum belongs to Cycadophyta'
- 'Taeniophyllum deflexum belongs to Taeniophyllum' according to Lesquereux 1878
- 'Taeniophyllum muensteri belongs to Taeniophyllum' according to Pomel 1849
- 'Taeniopitys belongs to Gymnospermophyta'
- 'Taeniopitys scotti belongs to Taeniopitys' according to Kraeusel 1962
- 'Taeniopteris belongs to Cycadophyta'
- 'Taeniopteris coriacea belongs to Taeniopteris' according to Goeppert 1864
- 'Taeniopteris coriacea is recombined as Spermopteris coriacea' according to Cridland and Morris 1960
- 'Taeniopteris jejunata belongs to Taeniopteris' according to Grand'Eury 1877
- 'Taeniopteris jejunata is recombined as Ilfeldia jejunata' according to Remy 1953
- 'Taeniopteris major belongs to Taeniopteris' according to Lindley and Hutton 1833
- 'Taeniopteris major is recombined as Macrotaeniopteris major' according to Schimper 1869
- 'Taeniopteris scitaminea belongs to Taeniopteris' according to Presl 1838
- 'Taeniopteris scitaminea is recombined as Pterozamites scitamineus' according to Braun 1843
- 'Taeniopteris vittata is recombined as Strangerites vittatus' according to Bornemann 1856
- 'Taeniopteris vittata is recombined as Oleandridium vittatum' according to Schimper 1869
- 'Taenioxylon belongs to Leguminosae'
- 'Taenioxylon is a nomen nudum'
- 'Taenioxylon indicum belongs to Taenioxylon' according to Crie 1889
- 'Taenioxylon varians belongs to Taenioxylon' according to Felix 1882
- 'Taeniozamites is a subjective synonym of Williamsoniella'
- 'Taenitites belongs to Pteridophyta'
- 'Taenitites crassicostatus belongs to Taenitites' according to Watelet 1909
- 'Taibia belongs to Plantae'
- 'Taibia tyrganensis belongs to Taibia' according to Zalessky 1934
- 'Taitia catena belongs to Taitia' according to Crookall 1930
- 'Taiwanioxylon belongs to Coniferales'
- 'Taiwanioxylon krasheninnikovii belongs to Taiwanioxylon' according to Jarmolenko 1958
- 'Takliostrobus belongs to Coniferales'
- 'Takliostrobus alatus belongs to Takliostrobus' according to Sahni 1931
- 'Tamaricoxylon belongs to Tamaricaceae'
- 'Tamarindoxylon belongs to Fabaceae'
- 'Tamarindoxylon antiquum belongs to Tamarindoxylon' according to Ramanujam 1961
- 'Tamesicarpum belongs to Lythraceae'
- 'Tamesicarpum polyspermum belongs to Tamesicarpum' according to Reid and Chandler 1933
- 'Tanaidia belongs to Gymnospermae'
- 'Tanaidia mirabilis belongs to Tanaidia' according to Prinada 1956
- 'Tanaidocarpidium belongs to Gymnospermae'
- 'Tanaidocarpidium triphyllum belongs to Tanaidocarpidium' according to Prinada 1956
- 'Tancrea belongs to Plantae'
- 'Tancrea cornuformis belongs to Tancrea' according to Stockmans 1948
- 'Tanymasia belongs to Plantae'
- 'Tanymasia pamirica belongs to Tanymasia' according to Prinada 1934
- 'Taonurus belongs to Problematica'
- 'Taonurus brianteus belongs to Taonurus' according to Villa 1858
- 'Taphrhelminthopsis auricularis belongs to Taphrhelminthopsis' according to Sacco 1888
- 'Taphrocanna belongs to Calamitales'
- 'Taphrocanna biarmica belongs to Taphrocanna' according to Eichwald 1860
- 'Tarrietioxylon belongs to Sterculiaceae'
- 'Tarrietioxylon sumatrense belongs to Tarrietioxylon' according to Kraeusel 1922
- 'Tasmanites belongs to Chlorophyceae'
- 'Tasmanites punctatus belongs to Tasmanites' according to Newton 1875
- 'Tastaephyton belongs to Lycopodophyta'
- 'Tastaephyton bulakus belongs to Tastaephyton' according to Senkevich 1959
- 'Taxaceoxylon belongs to Taxaceae'
- 'Taxaceoxylon rajmahalense belongs to Taxaceoxylon' according to Bhardwaj 1964
- 'Taxeopsis belongs to Coniferophyta'
- 'Taxeopsis grandeuryi belongs to Taxeopsis' according to Renault 1885
- 'Taxites ayckei belongs to Taxites' according to Goeppert 1840
- 'Taxites ayckei is recombined as Callitroxylon ayckei' according to Hartig 1848
- 'Taxites laxus belongs to Taxites' according to Phillips 1875
- 'Taxites laxus is recombined as Sewardiodendron laxum' according to Florin 1958
- 'Taxites siemiradzkii belongs to Taxites' according to Raciborski 1891
- 'Taxites siemiradzkii is recombined as Ixostrobus siemiradzkii' according to Raciborski 1891
- 'Taxites tournalii belongs to Taxites' according to Brongniart 1828
- 'Taxodiella belongs to Coniferales'
- 'Taxodiella recticaulis belongs to Taxodiella' according to Zalessky 1939
- 'Taxodioxylon belongs to Plantae'
- 'Taxodioxylon goepperti belongs to Taxodioxylon' according to Hartig 1848
- 'Taxodites belongs to Coniferophyta'
- 'Taxodites indicus is recombined as Palissya indica' according to Feistmantel 1877
- 'Taxodites tenuifolius belongs to Taxodites' according to Presl 1838
- 'Taxopitys belongs to Coniferales'
- 'Taxopitys africana belongs to Taxopitys' according to Kraeusel 1928
- 'Taxospermum belongs to Plantae'
- 'Taxospermum gruneri belongs to Taxospermum' according to Brongniart 1874
- 'Taxoxylon belongs to Coniferophyta'
- 'Taxoxylon falunense belongs to Taxoxylon' according to Houlbert 1910
- 'Taxulus belongs to Coniferales'
- 'Taxulus sideritica belongs to Taxulus' according to Bose 1955
- 'Tchernovia belongs to Plantae'
- 'Tchernovia synensis belongs to Tchernovia' according to Zalessky 1929
- 'Tchirkoviella belongs to Plantae'
- 'Tchirkoviella sibirica belongs to Tchirkoviella' according to Zalessky 1930
- 'Tectocarya belongs to Cornaceae'
- 'Tectocarya lusatica belongs to Tectocarya' according to Kirchheimer 1934
- 'Tectochara belongs to Charophyta'
- 'Tectonoxylon belongs to Verbenaceae'
- 'Tectonoxylon prambachense belongs to Tectonoxylon' according to Hofmann 1944
- 'Teichosperma belongs to Plantae'
- 'Teichosperma spadiflorum belongs to Teichosperma' according to Renner 1907
- 'Teilhardia belongs to Pteridophyta'
- 'Teilhardia valdensis belongs to Teilhardia' according to Seward 1913
- 'Telangium belongs to Pteridospermophyta'
- 'Telangium scotti belongs to Telangium' according to Benson 1904
- 'Telephragmoxylon belongs to Coniferales'
- 'Telephragmoxylon brachyphylloides belongs to Telephragmoxylon' according to Torrey 1921
- 'Teleutospora is replaced by Teleutosporites' according to Meschinelli 1898
- 'Teleutospora milloti belongs to Teleutospora' according to Renault 1894
- 'Teleutospora milloti is recombined as Teleutosporites milloti' according to Meschinelli 1898
- 'Teleutosporites belongs to Fungi'
- 'Tempskya pulchra belongs to Tempskya' according to Corda 1845
- 'Teneridinium belongs to Dinophyceae'
- 'Teneridinium magnoides belongs to Teneridinium' according to Krutzsch 1962
- 'Tenua belongs to Dinophyceae'
- 'Tenuicutites belongs to Chytridiomycetes'
- 'Tenuicutites chytridiaeformis belongs to Tenuicutites' according to Bertrand 1898
- 'Terminalia rectinervis belongs to Terminalia' according to Velenovsky 1884
- 'Terminalia rectinervis is recombined as Terminaliphyllum rectinerve' according to Velenovsky 1889
- 'Terminaliophyllum belongs to Plantae'
- 'Terminalioxylon belongs to Combretaceae'
- 'Terminalioxylon naranjo belongs to Terminalioxylon' according to Schoenfeld 1947
- 'Terminaliphyllum belongs to Combretaceae'
- 'Ternithrix belongs to Plantae'
- 'Ternithrix compressa belongs to Ternithrix' according to Reis 1921
- 'Ternstroemia belongs to Ericales'
- 'Ternstroemia crassipes belongs to Ternstroemia' according to Velenovsky 1884
- 'Ternstroemia crassipes is recombined as Ternstroemiphyllum crassipes' according to Velenovsky 1889
- 'Ternstroemioxylon belongs to Angiospermae'
- 'Ternstroemioxylon kraeuseli belongs to Ternstroemioxylon' according to Schoenfeld 1930
- 'Ternstroemiphyllum belongs to Ericales'
- 'Ternstroemites eoligniticus belongs to Ternstroemites' according to Berry 1916
- 'Ternstromiacinium belongs to Ericales'
- 'Ternstromiacinium euryoides belongs to Ternstromiacinium' according to Felix 1894
- 'Terquemella parisiensis belongs to Terquemella' according to Munier-Chalmas 1913
- 'Tersella belongs to Dasycladaceae'
- 'Tersella incompleta belongs to Tersella' according to Morellet 1951
- 'Tersiella beloussovae belongs to Tersiella' according to Radczenko 1960
- 'Teschia belongs to Anacardiaceae'
- 'Teschia crassicarpa belongs to Teschia' according to Reid and Reid 1915
- 'Tessellaria belongs to Cycadophyta'
- 'Tessellaria antiqua belongs to Tessellaria' according to Eichwald 1860
- 'Tetonophycus belongs to Corallinales'
- 'Tetonophycus blackwelderii belongs to Tetonophycus' according to Fenton and Fenton 1939
- 'Tetrabrachiophora belongs to Acritarcha'
- 'Tetrabrachiophora natans belongs to Tetrabrachiophora' according to Eisenack 1954
- 'Tetracentronites belongs to Trochodendrales'
- 'Tetracentronites hartzi belongs to Tetracentronites' according to Mathiesen 1932
- 'Tetraclinoxylon belongs to Cupressaceae'
- 'Tetraclinoxylon boureaui belongs to Tetraclinoxylon' according to Grambast 1951
- 'Tetragonis belongs to Plantae'
- 'Tetragonis murchisoni belongs to Tetragonis' according to Eichwald 1842
- 'Tetragonocarpus belongs to Plantae'
- 'Tetragonocarpus palibini belongs to Tetragonocarpus' according to Novik 1951
- 'Tetrameridium belongs to Sphenopteridae'
- 'Tetrameridium caducum belongs to Tetrameridium' according to Gothan 1913
- 'Tetrameristoxylon belongs to Theaceae'
- 'Tetrantheroidea belongs to Laurales'
- 'Tetrantheroidea polita belongs to Tetrantheroidea' according to Langeron 1899
- 'Tetraploporella belongs to Dasycladaceae'
- 'Tetraploporella remesi belongs to Tetraploporella' according to Steinmann 1903
- 'Tetrapterites belongs to Plantae'
- 'Tetrapterites visensis belongs to Tetrapterites' according to Sullivan and Hibbert 1964
- 'Tetraptilon belongs to Pteridophyta'
- 'Tetraptilon heteromerum belongs to Tetraptilon' according to Frenguelli 1950
- 'Tetrasphenophyllum belongs to Plantae'
- 'Tetrasphenophyllum majus belongs to Tetrasphenophyllum' according to Kidston 1909
- 'Tetrasporaceae belongs to Chlorophyta'
- 'Tetrasporites belongs to Plantae'
- 'Tetrasporites alsaticus belongs to Tetrasporites' according to Fliche 1886
- 'Tetrastichia belongs to Pteridospermophyta'
- 'Tetrastichia bupartides belongs to Tetrastichia' according to Gordon 1938
- 'Tetrastigmophyllum belongs to Plantae'
- 'Tetrastigmophyllum rottense belongs to Tetrastigmophyllum' according to Weyland 1941
- 'Tetratmema belongs to Pteridophyta'
- 'Tetraxylopteris belongs to Progymnospermopsida'
- 'Tetraxylopteris schmidtii belongs to Tetraxylopteris' according to Beck 1957
- 'Thalassocharis belongs to Alismatales'
- 'Thalictroides belongs to Plantae'
- 'Thalictroides parisensis belongs to Thalictroides' according to Mantell 1844
- 'Thallites belongs to Marchantiophyta'
- 'Thallomia belongs to Marchantiophyta'
- 'Thallomia llandyfriensis belongs to Thallomia' according to Heard and Jones 1931
- 'Thallophyta belongs to Plantae'
- 'Thamnites belongs to Plantae'
- 'Thamnocladus belongs to Plantae'
- 'Thamnocladus clarkei belongs to Thamnocladus' according to White 1902
- 'Thamnopteris belongs to Osmundaceae'
- 'Thomasiodendron is a misspelling of Thaumasiodendron'
- 'Thaumasiodendron belongs to Plantae'
- 'Thaumasiodendron andegavense belongs to Thaumasiodendron' according to Boureau 1905
- 'Thaumatophycus belongs to Plantae'
- 'Thaumatophycus furcatus belongs to Thaumatophycus' according to Korde 1950
- 'Thaumatoporella belongs to Dasycladaceae'
- 'Thaumatopteris belongs to Dipteridaceae'
- 'Thaumatopteris muensteri belongs to Thaumatopteris' according to Goeppert 1841
- 'Thecophyllum is a nomen nudum'
- 'Thecopteris belongs to Pteridophyta'
- 'Thecopteris major belongs to Thecopteris' according to Miner 1935
- 'Theobaldia belongs to Problematica'
- 'Theobaldia raetica belongs to Theobaldia' according to Heer 1877
- 'Thesianthium belongs to Santalaceae'
- 'Thesianthium inclusum belongs to Thesianthium' according to Conwentz 1886
- 'Thiebaudia belongs to Flacourtiaceae'
- 'Thiebaudia rayaniensis belongs to Thiebaudia' according to Chandler 1954
- 'Thinnfeldia belongs to Pteridospermophyta'
- 'Thinnfeldiella belongs to Filicinae'
- 'Thinnfeldiella reticulata belongs to Thinnfeldiella' according to Prinada 1956
- 'Thomasiocladus belongs to Cephalotaxaceae'
- 'Thonia belongs to Plantae'
- 'Thonia dentata belongs to Thonia' according to Stockmans and Williere 1955
- 'Thoreites belongs to Plantae'
- 'Thoreites brongniartii belongs to Thoreites' according to Massalongo 1850
- 'Thouinopsis belongs to Sapindaceae'
- 'Thuites belongs to Coniferophyta'
- 'Thuites alienus belongs to Thuites' according to Sternberg 1825
- 'Thuites expansus belongs to Thuites' according to Sternberg 1823
- 'Thuites expansus is recombined as Palaeocyparis expansus' according to Saporta 1872
- 'Thuites salicornioides belongs to Thuites' according to Unger 1841
- 'Thuites salicornioides is recombined as Libocedrites salicornioides' according to Endlicher 1847
- 'Thujoxylon juniperinum belongs to Thujoxylon' according to Unger 1854
- 'Thujoxylon juniperinum is recombined as Elatoxylon juniperinum' according to Hartig 1848
- 'Thuringia belongs to Pteridospermophyta'
- 'Thuringia callipteroides belongs to Thuringia' according to Remy 1953
- 'Thursophyton belongs to Lycopodophyta'
- 'Thursophyton milleri belongs to Thursophyton' according to Nathorst 1915
- 'Thuioxylon is a misspelling of Thuyoxylum'
- 'Thuoxylum is a misspelling of Thuyoxylum'
- 'Thuyoxylon is a misspelling of Thuyoxylum'
- 'Thujoxylon is a misspelling of Thuyoxylum'
- 'Thuyoxylum belongs to Plantae'
- 'Thuoxylon is a misspelling of Thuyoxylum'
- 'Thuyoxylum juniperinum belongs to Thuyoxylum' according to Unger 1842
- 'Thylax belongs to Plantae'
- 'Thylax brittannicus belongs to Thylax' according to Renault 1896
- 'Thylloxylon belongs to Coniferophyta'
- 'Thylloxylon irregulare belongs to Thylloxylon' according to Gothan 1910
- 'Thymelaeaspermum belongs to Thymelaeaceae'
- 'Thymelaeaspermum lakense belongs to Thymelaeaspermum' according to Chandler 1962
- 'Thyrsoporella cancellata belongs to Thyrsoporella' according to Guembel 1871
- 'Thysanosperma belongs to Plantae'
- 'Thysanosperma ovatum belongs to Thysanosperma' according to Zalessky 1937
- 'Thysanotesta belongs to Plantae'
- 'Thysanotesta sagittula belongs to Thysanotesta' according to Nathorst 1914
- 'Ticoa belongs to Plantae'
- 'Ticoa harrisii belongs to Ticoa' according to Archangelsky 1963
- 'Tietea belongs to Pteridophyta'
- 'Tietea singularis belongs to Tietea' according to Solms-Laubach 1913
- 'Tigillites dufrenoyi belongs to Tigillites' according to Roualt 1850
- 'Tiliaephyllum belongs to Tiliaceae'
- 'Tiliaephyllum dubium belongs to Tiliaephyllum' according to Newberry 1895
- 'Tiliaepollenites instructus belongs to Tiliaepollenites' according to Potonie 1931
- 'Tiliaepollenites instructus is recombined as Burretia instructa' according to Mai 1961
- 'Tilioxylon belongs to Tiliaceae'
- 'Tiloxylon belongs to Plantae'
- 'Tingia belongs to Plantae'
- 'Tingia carbonica belongs to Tingia' according to Schenk 1925
- 'Tingiostachya belongs to Plantae'
- 'Tingiostachya tetralocularis belongs to Tingiostachya' according to Kon'no 1929
- 'Tinomiscoidea belongs to Menispermaceae'
- 'Tinomiscoidea scaphiformis belongs to Tinomiscoidea' according to Reid and Chandler 1933
- 'Tinpaharia belongs to Plantae'
- 'Tinpaharia sinuosa belongs to Tinpaharia' according to Jacob 1943
- 'Titanophyllum belongs to Cordaitales'
- 'Titanophyllum grandeuryi belongs to Titanophyllum' according to Renault 1890
- 'Tithymalites belongs to Cordaitales'
- 'Tithymalites biformis belongs to Tithymalites' according to Presl 1838
- 'Tmematostrobus belongs to Plantae'
- 'Tmematostrobus eremus belongs to Tmematostrobus' according to Harris 1935
- 'Tobleria belongs to Plantae'
- 'Tobleria biscuspis belongs to Tobleria' according to Jongmans and Gothan 1925
- 'Toddaliospermum belongs to Rutaceae'
- 'Toddaliospermum ornatum belongs to Toddaliospermum' according to Chandler 1963
- 'Todeopsis belongs to Osmundaceae'
- 'Todeopsis primaeva belongs to Todeopsis' according to Renault 1896
- 'Todites belongs to Osmundaceae'
- 'Todites williamsoni belongs to Todites' according to Brongniart 1900
- 'Tomaxellia belongs to Coniferales'
- 'Tomaxellia degiustoi belongs to Tomaxellia' according to Archangelsky 1963
- 'Tomharrisia belongs to Taxopsida'
- 'Tomharrisia ramosa belongs to Tomharrisia' according to Florin 1958
- 'Tomia belongs to Plantae'
- 'Tomia radczenkoi belongs to Tomia' according to Srebrodolskaja 1960
- 'Tomiodendron belongs to Lycopodophyta'
- 'Tomiodendron ostrogianum belongs to Tomiodendron' according to Radchenko 1956
- 'Tomiphyton belongs to Psilophytophyta'
- 'Tomiphyton primaevum belongs to Tomiphyton' according to Zalessky 1937
- 'Tomistachys belongs to Plantae'
- 'Tomistachys thyrsiculus belongs to Tomistachys' according to Zalessky 1934
- 'Tongshania belongs to Plantae'
- 'Tongshania dentata belongs to Tongshania' according to Stockmans and Mathieu 1957
- 'Toolongia belongs to Dinophyceae'
- 'Toolongia medusoides belongs to Toolongia' according to Cookson and Eisenack 1960
- 'Tordoxylon belongs to Gymnospermophyta'
- 'Tordoxylon steynspruitense belongs to Tordoxylon' according to Kraeusel 1956
- 'Torellia belongs to Taxaceae'
- 'Torellia rigida belongs to Torellia' according to Heer 1870
- 'Torreyites belongs to Coniferophyta'
- 'Torulites belongs to Dematiaceae'
- 'Torulites conwentzi belongs to Torulites' according to Felix 1927
- 'Tracheotheca belongs to Plantae'
- 'Trachydiacrodium belongs to Acritarcha'
- 'Trachydiacrodium productum belongs to Trachydiacrodium' according to Timofeev 1959
- 'Trachyphyton belongs to Plantae'
- 'Trachyphyton neglegibile belongs to Trachyphyton' according to Gothan 1928
- 'Trachyrytidodiacrodium belongs to Problematica'
- 'Trachyrytidodiacrodium involutivum belongs to Trachyrytidodiacrodium' according to Timofeev 1959
- 'Trachysphaeridium is a nomen nudum'
- 'Trachyzonodiacrodium belongs to Problematica'
- 'Trachyzonodiacrodium signatum belongs to Trachyzonodiacrodium' according to Timofeev 1959
- 'Trametites belongs to Fungi'
- 'Trametites pini belongs to Trametites' according to Brotero 1892
- 'Trapophyllum belongs to Plantae'
- 'Trapophyllum europaeum belongs to Trapophyllum' according to Massalongo 1858
- 'Traquairia belongs to Plantae'
- 'Traquairia carruthersii belongs to Traquairia' according to Rina Scott 1911
- 'Trematocaryon belongs to Plantae'
- 'Trematocaryon mclellani belongs to Trematocaryon' according to Mueller 1871
- 'Trematosphaeridium belongs to Acritarcha'
- 'Trematosphaeridium decoratum belongs to Trematosphaeridium' according to Timofeev 1959
- 'Trematosphaerites belongs to Fungi'
- 'Trematosphaerites belongs to Fungi'
- 'Trematosphaerites intercellularis belongs to Trematosphaerites' according to Gruess 1924
- 'Trematosphaerites lignitum belongs to Trematosphaerites' according to Heer 1892
- 'Trematoxylon belongs to Coniferophyta'
- 'Trematoxylon leunisii belongs to Trematoxylon' according to Hartig 1848
- 'Tremophyllum belongs to Ulmaceae'
- 'Tremophyllum tenerrimum belongs to Tremophyllum' according to Weber 1963
- 'Trevisania belongs to Plantae'
- 'Trevisania furcellata belongs to Trevisania' according to Zigno 1856
- 'Triangulopsis belongs to Acritarcha'
- 'Triangulopsis discoidalis belongs to Triangulopsis' according to Döring 1961
- 'Trianthera belongs to Lauraceae'
- 'Trianthera eusideroxyloides belongs to Trianthera' according to Conwentz 1886
- 'Triblastula belongs to Dinophyceae'
- 'Triblastula utinensis belongs to Triblastula' according to Wetzel 1933
- 'Tricalycites belongs to Plantae'
- 'Tricalycites papyraceus belongs to Tricalycites' according to Newberry 1895
- 'Tricarpellites belongs to Plantae'
- 'Tricarpellites communis belongs to Tricarpellites' according to Bowerbank 1840
- 'Trichioblastes belongs to Plantae'
- 'Trichoblastium belongs to Plantae'
- 'Trichodes belongs to Plantae'
- 'Trichodinium belongs to Dinophyceae'
- 'Trichoides belongs to Plantae'
- 'Trichoides ambiguus belongs to Trichoides' according to Harkness 1855
- 'Trichomanides laxum belongs to Trichomanides' according to Tenison-Woods 1883
- 'Trichomanites belongs to Hymenophyllaceae'
- 'Trichomanites myriophyllum belongs to Trichomanites' according to Goeppert 1836
- 'Trichopeltaceae belongs to Fungi'
- 'Trichopeltinites belongs to Trichopeltaceae'
- 'Trichopeltinites pulcher belongs to Trichopeltinites' according to Cookson 1947
- 'Trichophragmium belongs to Plantae'
- 'Trichophycus lanosus belongs to Trichophycus' according to Miller and Dyer 1878
- 'Trichopitys belongs to Coniferales'
- 'Trichopitys heteromorpha belongs to Trichopitys' according to Saporta 1875
- 'Trichoplasmium belongs to Plantae'
- 'Trichopteris belongs to Pteridophyta'
- 'Trichopteris filamentosa belongs to Trichopteris' according to Hall 1845
- 'Trichosporites belongs to Fungi'
- 'Trichosporites conwentzi belongs to Trichosporites' according to Felix 1894
- 'Trichothyrites belongs to Fungi'
- 'Trichothyrites pleistocaenica belongs to Trichothyrites' according to Rosendahl 1943
- 'Tricoccites belongs to Palmae'
- 'Tricoccites trigonum belongs to Tricoccites' according to Rode 1933
- 'Tricoemplectopteris belongs to Gigantopteridales'
- 'Tricoemplectopteris taiyuanensis belongs to Tricoemplectopteris' according to Asama 1959
- 'Tricoilocaryon belongs to Plantae'
- 'Tricoilocaryon barnardi belongs to Tricoilocaryon' according to Mueller 1878
- 'Tricranolepis belongs to Coniferales'
- 'Tricranolepis monosperma belongs to Tricranolepis' according to Roselt 1958
- 'Trigonocarpolithus belongs to Trigonocarpales'
- 'Trigonocarpolithus typicus belongs to Trigonocarpolithus' according to Arnold 1948
- 'Trigonocarpon belongs to Plantae'
- 'Trigonocarpon ellipsoideum belongs to Trigonocarpon' according to Goeppert 1852
- 'Trigonocarpon ellipsoideum is recombined as Lepidocarpus ellipsoideus' according to Rothpletz 1880
- 'Trigonocarpus andanensis belongs to Trigonocarpus' according to Stockmans and Williere 1953
- 'Trigonocarpus andanensis is recombined as Murinicarpus andanensis' according to Stockmans and Williere 1961
- 'Trigonocarpus parkinsoni belongs to Trigonocarpus' according to Brongniart 1828
- 'Trigonomyelon belongs to Peltaspermales'
- 'Trigonopyxidia belongs to Acritarcha'
- 'Trigonopyxis belongs to Acritarcha'
- 'Trilobium belongs to Anacardiaceae'
- 'Trilobium ungeri belongs to Trilobium' according to Saporta 1861
- 'Trimatopteris belongs to Pteridophyta'
- 'Trimeriaephyllum belongs to Flacourtiaceae'
- 'Trimeriaephyllum hungaricum belongs to Trimeriaephyllum' according to Rasky 1962
- 'Trimerophyton belongs to Psilophytophyta'
- 'Trinocladus tripolitanus belongs to Trinocladus' according to Raineri 1922
- 'Trinodella belongs to Plantae'
- 'Trinodella bifurcata belongs to Trinodella' according to Maslov and Kulik 1956
- 'Trioolepis belongs to Pinales'
- 'Trioolepis leclerei belongs to Trioolepis' according to Zeiller 1903
- 'Triphyllopteris belongs to Sphenopteridae'
- 'Triphyllopteris collombiana belongs to Triphyllopteris' according to Schimper 1869
- 'Triphyllum belongs to Angiospermae'
- 'Triphyllum fechtneri belongs to Triphyllum' according to Velenovsky and Viniklar 1931
- 'Triplicarpus belongs to Angiospermae'
- 'Triplicarpus purkynei belongs to Triplicarpus' according to Velenovsky and Viniklar 1926
- 'Triploporella fraasi belongs to Triploporella' according to Steinmann 1880
- 'Triplosporites belongs to Lycopodophyta'
- 'Triplosporites brownii belongs to Triplosporites' according to Unger 1850
- 'Tripterocarpus is a nomen nudum'
- 'Tripterospermum belongs to Plantae'
- 'Tripterospermum rostratum belongs to Tripterospermum' according to Brongniart 1874
- 'Tripterygium multipterium belongs to Tripterygium' according to Miki 1941
- 'Tripterygium multipterium is recombined as Paleodavidia multipterium' according to Miki 1956
- 'Triqueteria belongs to Plantae'
- 'Triqueteria sinensis belongs to Triqueteria' according to Stockmans and Mathieu 1957
- 'Tristachya belongs to Plantae'
- 'Tristachya raciborskii belongs to Tristachya' according to Lilpop 1937
- 'Tristanites belongs to Myrtaceae'
- 'Tristanites belongs to Plantae'
- 'Tristanites angustifolia belongs to Tristanites' according to Deane 1902
- 'Tristanites cloeziaeformis belongs to Tristanites' according to Saporta 1865
- 'Tristichia belongs to Pteridospermophyta'
- 'Tristichia ovensi belongs to Tristichia' according to Long 1961
- 'Triticoides belongs to Poales'
- 'Triticoides blanchii belongs to Triticoides' according to De Stefani 1948
- 'Trizygia belongs to Sphenophyllales'
- 'Trizygia speciosa belongs to Trizygia' according to Royle 1840
- 'Trochiliscus belongs to Characeae'
- 'Trochiliscus ingricus belongs to Trochiliscus' according to Karpinsky 1906
- 'Trochiliscus laticostatus belongs to Trochiliscus' according to Peck 1934
- 'Trochiliscus laticostatus is recombined as Karpinskya laticostatus' according to Grambast 1962
- 'Trochoaster belongs to Discoasteridae'
- 'Trochoaster simplex belongs to Trochoaster' according to Klumpp 1953
- 'Trochodendroides belongs to Trochodendraceae'
- 'Trochodendroides rhomboideus belongs to Trochodendroides' according to Berry 1922
- 'Trochodendromagnolia belongs to Plantae'
- 'Trochodendroxylon belongs to Trochodendraceae'
- 'Trochodendroxylon beckii belongs to Trochodendroxylon' according to Hergert and Phinney 1954
- 'Trochophyllum is an objective synonym of Annularia'
- 'Trutexites belongs to Plantae'
- 'Trutexites arboriformis belongs to Trutexites' according to Maslov 1960
- 'Trypterocarpus belongs to Plantae'
- 'Trypterocarpus arcuatus belongs to Trypterocarpus' according to Grand'Eury 1890
- 'Tschichatschevia belongs to Plantae'
- 'Tschichatschevia lituus belongs to Tschichatschevia' according to Maslov 1955
- 'Tsugites belongs to Coniferales'
- 'Tsugites magnus belongs to Tsugites' according to Fliche 1896
- 'Tuarella belongs to Plantae'
- 'Tuarella lobifolia belongs to Tuarella' according to Burakora 1961
- 'Tubercolarites belongs to Fungi'
- 'Tubercolarites iani belongs to Tubercolarites' according to Arcangeli 1903
- 'Tubercularia belongs to Cyanobacteria'
- 'Tubercularia latiuscula belongs to Tubercularia' according to Vologdin 1962
- 'Tubicaulidaceae belongs to Pteridophyta'
- 'Tubicaulis belongs to Tubicaulidaceae'
- 'Tubicaulis dubius belongs to Tubicaulis' according to Corda 1832
- 'Tubicaulis dubius is replaced by Selenochlaena microrrhiza' according to Corda 1845
- 'Tubicaulis primarius belongs to Tubicaulis' according to Cotta 1932
- 'Tubicaulis primarius is recombined as Zygopteris primaeva' according to Corda 1845
- 'Tubicaulis ramosus belongs to Tubicaulis' according to Cotta 1832
- 'Tubicaulis ramosus is replaced by Asterochlaena cottai' according to Corda 1845
- 'Tubicaulis solenites belongs to Tubicaulis' according to Sprengel 1832
- 'Tubiculites belongs to Marattiaceae'
- 'Tubiculites relaxatomaximum belongs to Tubiculites' according to Grand'Eury 1877
- 'Tubiphytes belongs to Schizophyta'
- 'Tubophyllum belongs to Plantae'
- 'Tubophyllum victori belongs to Tubophyllum' according to Krasnopeeva 1955
- 'Tumidophyton belongs to Cyanobacteria'
- 'Tumidophyton nucamentum belongs to Tumidophyton' according to Vologdin 1962
- 'Tumion belongs to Coniferophyta'
- 'Tumion carolinianum belongs to Tumion' according to Berry 1908
- 'Tumion carolinianum is recombined as Torreyites carolianus' according to Seward 1919
- 'Tumulistigma belongs to Plantae'
- 'Tumulistigma furculorum belongs to Tumulistigma' according to Bayer 1914
- 'Tundrodendron belongs to Plantae'
- 'Tundrodendron petschorense belongs to Tundrodendron' according to Zalessky 1960
- 'Tungussia belongs to Problematica'
- 'Tungussia nodosa belongs to Tungussia' according to Semikhatov 1962
- 'Turkmeniaria belongs to Plantae'
- 'Turkmeniaria adducta belongs to Turkmeniaria' according to Maslov 1960
- 'Turuchania belongs to Problematica'
- 'Turuchania arbora belongs to Turuchania' according to Semikhatov 1962
- 'Tussilagites belongs to Plantae'
- 'Tussilagites tertiaria belongs to Tussilagites' according to Gruess 1927
- 'Tuzsonia belongs to Palmae'
- 'Tuzsonia hungarica belongs to Tuzsonia' according to Andreanszky 1949
- 'Tychtopteris belongs to Plantae'
- 'Tychtopteris cuneata belongs to Tychtopteris' according to Schmalhausen 1930
- 'Tyliosperma belongs to Pteridospermophyta'
- 'Tyliosperma orbiculatum belongs to Tyliosperma' according to Mamay 1954
- 'Tylodendron belongs to Plantae'
- 'Tylodendron speciosum belongs to Tylodendron' according to Weiss 1870
- 'Tylophora radiculosa belongs to Tylophora' according to Hick 1892
- 'Tympanophora belongs to Cyatheaceae'
- 'Zympanophora is a misspelling of Tympanophora'
- 'Tympanophora simplex belongs to Tympanophora' according to Lindley and Hutton 1835
- 'Typhacites belongs to Typhaceae'
- 'Typhacites rugosus belongs to Typhacites' according to Saporta 1890
- 'Typhaeloipum belongs to Typhaceae'
- 'Typhaeloipum lacustre belongs to Typhaeloipum' according to Unger 1845
- 'Tyrgaeina belongs to Plantae'
- 'Tyrgaeina mamillaris belongs to Tyrgaeina' according to Zalessky 1944
- 'Tyrmia belongs to Bennettitales'
- 'Tyrmia tyrmensis belongs to Tyrmia' according to Prinada 1956
- 'Tysonia belongs to Bennettitales'
- 'Tysonia marylandica belongs to Tysonia' according to Fontaine 1889
- 'Tytthodiscus belongs to Plantae'
- 'Tytthodiscus californiensis belongs to Tytthodiscus' according to Norem 1955
- 'Ularia belongs to Lycopodophyta'
- 'Ularia ovalis belongs to Ularia' according to Zalessky 1937
- 'Ullmannia belongs to Plantae'
- 'Ullmannia bronnii belongs to Ullmannia' according to Goeppert 1850
- 'Ullmannites belongs to Plantae'
- 'Ullmannites beinertianus belongs to Ullmannites' according to Goeppert 1911
- 'Ulmacites belongs to Ulmaceae'
- 'Ulmacites succineus belongs to Ulmacites' according to Caspary 1886
- 'Ulminium diluviale belongs to Ulminium' according to Unger 1842
- 'Ulmiphyllum belongs to Ulmaceae'
- 'Ulmiphyllum brookense belongs to Ulmiphyllum' according to Fontaine 1889
- 'Ulmites belongs to Plantae'
- 'Ulmites pusillus belongs to Ulmites' according to Dawson 1890
- 'Ulmophyllum belongs to Ulmaceae'
- 'Ulmophyllum oblongum belongs to Ulmophyllum' according to Ettingshausen 1886
- 'Ulmoxylon belongs to Fabales'
- 'Ulmuxylon belongs to Ulmaceae'
- 'Ulodendron belongs to Lycopodophyta'
- 'Ulodendron majus belongs to Ulodendron' according to Lindley and Hutton 1831
- 'Ulodendrostrobus belongs to Plantae'
- 'Ulodendrostrobus squarrosus belongs to Ulodendrostrobus' according to Renier 1931
- 'Ulospermum belongs to Plantae'
- 'Ulostrobus belongs to Lycopodophyta'
- 'Ulostrobus squarrosus belongs to Ulostrobus' according to Kidston 1938
- 'Ulvites belongs to Plantae'
- 'Ulvopteris belongs to Plantae'
- 'Ulvopteris ammonis belongs to Ulvopteris' according to Schuster 1908
- 'Umbelliferites belongs to Plantae'
- 'Umbelliferospermum belongs to Umbelliferae'
- 'Umbelliferospermum latahense belongs to Umbelliferospermum' according to Berry 1929
- 'Umkomasia macleani belongs to Umkomasia' according to Thomas 1933
- 'Unatheca belongs to Coenopteridales'
- 'Unatheca oblongus belongs to Unatheca' according to Kidston 1891
- 'Uncinulites belongs to Fungi'
- 'Uncinulites baccarinii belongs to Uncinulites' according to Pampaloni 1902
- 'Ungdarella belongs to Florideae'
- 'Ungdarella uralica belongs to Ungdarella' according to Maslov 1956
- 'Ungeria belongs to Pteridophyta'
- 'Ungeria solenhofensis belongs to Ungeria' according to Salfeld 1908
- 'Ungerites belongs to Leguminosae'
- 'Ungerites tropicus belongs to Ungerites' according to Schleiden 1855
- 'Unguitheca belongs to Pteridospermophyta'
- 'Unguitheca pecopteroides belongs to Unguitheca' according to Remy 1953
- 'Uniferata is a nomen nudum'
- 'Unjaella belongs to Dasycladaceae'
- 'Unjaella ovata belongs to Unjaella' according to Korde 1951
- 'Uphantenia chemungensis belongs to Uphantenia' according to Vanuxem 1842
- 'Uphantenia chemungensis is recombined as Hyphantaenia chemungensis' according to Roemer 1880
- 'Uragiella belongs to Plantae'
- 'Uragiella suprajurassica belongs to Uragiella' according to Pia 1925
- 'Uralella belongs to Plantae'
- 'Uralella ramosa belongs to Uralella' according to Korde 1957
- 'Uralidium belongs to Plantae'
- 'Uralidium singulare belongs to Uralidium' according to Zalessky 1939
- 'Uralobaiera belongs to Plantae'
- 'Uralobaiera bairmica belongs to Uralobaiera' according to Zalessky 1939
- 'Uralodendron belongs to Coniferales'
- 'Uralodendron verticillatum belongs to Uralodendron' according to Zalessky 1939
- 'Uralophyllum krascheninnikovii belongs to Uralophyllum' according to Kryshtofovich and Prinada 1933
- 'Uraloporella belongs to Dasycladaceae'
- 'Uraloporella variabilis belongs to Uraloporella' according to Korde 1950
- 'Uralopteris belongs to Pteridophyta'
- 'Uralopteris valida belongs to Uralopteris' according to Zalessky 1939
- 'Uralosperma belongs to Plantae'
- 'Uralosperma insigne belongs to Uralosperma' according to Zalessky 1939
- 'Uraniophyllites belongs to Plantae'
- 'Uraniophyllites spathulata belongs to Uraniophyllites' according to Savi 1843
- 'Uranovia belongs to Plantae'
- 'Uranovia granosa belongs to Uranovia' according to Korde 1958
- 'Uredinales belongs to Urediniomycetes'
- 'Uredinites belongs to Plantae'
- 'Uredinites cretaceous belongs to Uredinites' according to Velenovsky 1889
- 'Urnatopteris belongs to Sphenopteridae'
- 'Urohelminthoida dertonensis belongs to Urohelminthoida' according to Sacco 1888
- 'Uromycetites is a nomen nudum'
- 'Urophlyctites belongs to Fungi'
- 'Urophlyctites oliverianus belongs to Urophlyctites' according to Magnus 1903
- 'Urophlyctites stigmariae belongs to Urophlyctites' according to Weiss 1904
- 'Uroplasmium belongs to Plantae'
- 'Ursodendron belongs to Plantae'
- 'Ursodendron chacassicum belongs to Ursodendron' according to Radchenko 1960
- 'Urticicarpum belongs to Urticaceae'
- 'Urticicarpum scutellum belongs to Urticicarpum' according to Reid and Chandler 1933
- 'Uskatia belongs to Plantae'
- 'Uskatia conferta belongs to Uskatia' according to Neuburg 1960
- 'Ussuriopteris belongs to Filicinae'
- 'Ussuriopteris rossica belongs to Ussuriopteris' according to Prinada 1956
- 'Uteria encrinella belongs to Uteria' according to Michelin 1847
- 'Utricularites belongs to Plantae'
- 'Utricularites protogaeus belongs to Utricularites' according to Massalongo 1857
- 'Uva belongs to Codiaceae'
- 'Uva suspecta belongs to Uva' according to Maslov 1956
- 'Uvasporina belongs to Fungi'
- 'Uvasporina socialis belongs to Uvasporina' according to Benes 1956
- 'Vaccinophyllum belongs to Plantae'
- 'Vaccinophyllum quaestum belongs to Vaccinophyllum' according to Dawson 1890
- 'Valensiella belongs to Dinophyceae'
- 'Valerianellites belongs to Rubiaceae'
- 'Valerianellites capitatus belongs to Valerianellites' according to Saporta 1862
- 'Validopteris belongs to Alethopteridae'
- 'Validopteris integra belongs to Validopteris' according to Gothan 1932
- 'Vallisnerites belongs to Poales'
- 'Vallisnerites jurassicus belongs to Vallisnerites' according to Heer 1878
- 'Valonites belongs to Plantae'
- 'Valonites utriculosus belongs to Valonites' according to Sordelli 1873
- 'Vannus belongs to Glossopteridaceae'
- 'Vannus gondwanensis belongs to Vannus' according to Plumstead 1963
- 'Vardekloeftia belongs to Bennettitales'
- 'Vardekloeftia sulcata belongs to Vardekloeftia' according to Harris 1932
- 'Vargolopteris belongs to Pteridophyta'
- 'Vargolopteris rossica belongs to Vargolopteris' according to Prinada 1945
- 'Variolaria is a subjective synonym of Stigmaria'
- 'Vaticoxylon belongs to Dipterocarpaceae'
- 'Vaticoxylon pliocaenicum belongs to Vaticoxylon' according to Schweitzer 1958
- 'Vavososphaeridium belongs to Acritarcha'
- 'Vavososphaeridium michaelovski belongs to Vavososphaeridium' according to Timofeev 1959
- 'Vectia belongs to Plantae'
- 'Vectia luccombensis belongs to Vectia' according to Stopes 1915
- 'Velebitella triplicata belongs to Velebitella' according to Kochansky-Devide 1964
- 'Verbenophyllum belongs to Plantae'
- 'Verbenophyllum aculeatum belongs to Verbenophyllum' according to Ettingshausen 1858
- 'Vermiculites belongs to Problematica'
- 'Vermiculites panteri belongs to Vermiculites' according to Rouault 1850
- 'Vermiporella fragilis belongs to Vermiporella' according to Stolley 1893
- 'Veronicites belongs to Labiatae'
- 'Veronicites oeningensis belongs to Veronicites' according to Heer 1859
- 'Verrucania belongs to Plantae'
- 'Verrucania guilelmitica belongs to Verrucania' according to Fucini 1936
- 'Verrucarites is a nomen nudum'
- 'Verticillopora belongs to Dasycladaceae'
- 'Verticillopora annulata belongs to Verticillopora' according to Rezak 1959
- 'Veryhachium trisulcum belongs to Veryhachium' according to Deunff 1954
- 'Vesquia belongs to Taxaceae'
- 'Vesquia tournaissi belongs to Vesquia' according to Bertrand 1883
- 'Vexillum belongs to Plantae'
- 'Vexillum labechei belongs to Vexillum' according to Rouault 1850
- 'Viatcheslavia belongs to Lycopodophyta'
- 'Viatcheslavia vorcutensis belongs to Viatcheslavia' according to Zalessky 1936
- 'Viatschesiaviophyllum belongs to Plantae'
- 'Viatschesiaviophyllum vorcutense belongs to Viatschesiaviophyllum' according to Neuburg 1960
- 'Viburniphyllum belongs to Caprifoliaceae'
- 'Viburnites belongs to Caprifoliaceae'
- 'Viburnites crassus belongs to Viburnites' according to Lesquereux 1892
- 'Viburnum giganteum belongs to Viburnum' according to Saporta 1868
- 'Viburnum giganteum is recombined as Viburniphyllum giganteum' according to Nathorst 1886
- 'Villarsites belongs to Plantae'
- 'Villarsites ungeri belongs to Villarsites' according to Muensteri 1842
- 'Villersia belongs to Plantae'
- 'Villersia radians belongs to Villersia' according to Stockmans 1948
- 'Viracarpon belongs to Monocotyledonae'
- 'Viracarpon hexaspermum belongs to Viracarpon' according to Sahni 1934
- 'Viscophyllum belongs to Loranthaceae'
- 'Viscophyllum morloti belongs to Viscophyllum' according to Unger 1904
- 'Visheraia belongs to Plantae'
- 'Visheraia flabellata belongs to Visheraia' according to Korde 1958
- 'Viticocarpum belongs to Verbenaceae'
- 'Viticocarpum pusillum belongs to Viticocarpum' according to Menzel 1913
- 'Vitigene belongs to Vitaceae'
- 'Vitigene cissoides belongs to Vitigene' according to Saporta 1865
- 'Vitiphyllum belongs to Vitaceae'
- 'Vitiphyllum belongs to Vitaceae'
- 'Vitiphyllum crassifolium belongs to Vitiphyllum' according to Fontaine 1889
- 'Vitiphyllum raumanni belongs to Vitiphyllum' according to Nathorst 1888
- 'Vitoxylon belongs to Vitaceae'
- 'Vitoxylon coheni belongs to Vitoxylon' according to Schuster 1911
- 'Vojnovskya belongs to Gymnospermophyta'
- 'Vojnovskya paradoxa belongs to Vojnovskya' according to Neuburg 1955
- 'Volkelia belongs to Sphenopteridae'
- 'Volkmannia belongs to Plantae'
- 'Volkmannia arborescens belongs to Volkmannia' according to Sternberg 1833
- 'Volkmannia arborescens is recombined as Stylocalamites arborescens' according to Weiss 1884
- 'Volkmannia dawsoni belongs to Volkmannia' according to Williamson 1871
- 'Volkmannia dawsoni is recombined as Sphenophyllostachys dawsoni' according to Seward 1896
- 'Volkmannia distachya belongs to Volkmannia' according to Sternberg 1825
- 'Volnovakhia belongs to Plantae'
- 'Volnovakhia sagenarioides belongs to Volnovakhia' according to Zalessky 1931
- 'Vologdinella fragilis belongs to Vologdinella' according to Korde 1957
- 'Voltzia brevifolia belongs to Voltzia' according to Brongniart 1828
- 'Voltzia coburgensis belongs to Voltzia' according to Schauroth 1852
- 'Voltzia coburgensis is recombined as Voltziopsis coburgensis' according to Potonié 1899
- 'Voltzia heterophylla is recombined as Buriadia heterophylla' according to Feistmantel 1920
- 'Voltzia hungarica belongs to Voltzia' according to Heer 1876
- 'Voltzia hungarica is recombined as Voltzites hungarica' according to Tuzson 1911
- 'Voltzia liebeana belongs to Voltzia' according to Geinitz 1880
- 'Voltzia liebeana is recombined as Pseudovoltzia liebeana' according to Florin 1927
- 'Voltzia quinquies belongs to Voltzia' according to Linck 1951
- 'Voltzia quinquies is recombined as Pachylepis quinquies' according to Kraeusel 1952
- 'Voltzioxylon belongs to Coniferales'
- 'Voltzioxylon dockumense belongs to Voltzioxylon' according to Torrey 1923
- 'Voltzites belongs to Plantae'
- 'Volubilites belongs to Plantae'
- 'Vorcutannularia belongs to Plantae'
- 'Vorcutannularia plicata belongs to Vorcutannularia' according to Pogorevitsch 1960
- 'Vulcanisphaera belongs to Dinophyceae'
- 'Vulcanisphaera africana belongs to Vulcanisphaera' according to Deunff 1961
- 'Wackersdorfia belongs to Helobiae'
- 'Wackersdorfia dubia belongs to Wackersdorfia' according to Peters 1963
- 'Wahpia belongs to Rhodomelaceae'
- 'Wahpia insolens belongs to Wahpia' according to Walcott 1919
- 'Walchia belongs to Coniferophyta'
- 'Walchianthus belongs to Coniferales'
- 'Walchianthus cylindraceus belongs to Walchianthus' according to Florin 1940
- 'Walchiopremnon belongs to Coniferales'
- 'Walchiopremnon valdajolense belongs to Walchiopremnon' according to Florin 1940
- 'Walchiostrobus belongs to Coniferales'
- 'Walchiostrobus gothanii belongs to Walchiostrobus' according to Florin 1940
- 'Waldenburgia belongs to Schizaeaceae'
- 'Waldenburgia corynepteroides belongs to Waldenburgia' according to Gothan 1950
- 'Walikalia belongs to Plantae'
- 'Walikalia cahenii belongs to Walikalia' according to Hoeg and Bose 1960
- 'Walkomia belongs to Plantae'
- 'Walkomia is replaced by Walkomiella' according to Florin 1944
- 'Walkomia australis belongs to Walkomia' according to Feistmantel 1940
- 'Walkomia australis is recombined as Walkomiella australis' according to Florin 1944
- 'Walkomiella belongs to Coniferales'
- 'Walkomiellospermum belongs to Plantae'
- 'Walkomiellospermum indicum belongs to Walkomiellospermum' according to Pant and Srivastava 1964
- 'Waputikia belongs to Rhodomelaceae'
- 'Wardenia belongs to Menispermaceae'
- 'Wardenia davisi belongs to Wardenia' according to Chandler 1961
- 'Wardia fertilis belongs to Wardia' according to White 1904
- 'Weedia belongs to Cyanophyceae'
- 'Weedia tuberosa belongs to Weedia' according to Walcott 1914
- 'Weichselia ludovicae belongs to Weichselia' according to Stiehler 1857
- 'Weissites belongs to Medullosaceae'
- 'Weissites vescicularis belongs to Weissites' according to Goeppert 1836
- 'Weltrichia mirabilis belongs to Weltrichia' according to Braun 1847
- 'Wendiella is a nomen nudum'
- 'Wessexia belongs to Angiospermae'
- 'Wessexia fibrosa belongs to Wessexia' according to Chandler 1963
- 'Westersheimia belongs to Cycadophyta'
- 'Westersheimia pramelreuthensis belongs to Westersheimia' according to Krasser 1918
- 'Wetherellia belongs to Linaceae'
- 'Wetzeliella belongs to Dinophyceae'
- 'Wetzeliella articulata belongs to Wetzeliella' according to Eisenack 1938
- 'Wetzelodinium belongs to Dinophyceae'
- 'Wetzelodinium tentaculatum belongs to Wetzelodinium' according to Deflandre 1936
- 'Whittleseya belongs to Pteridospermophyta'
- 'Whittleseyinae belongs to Medullosaceae'
- 'Widdringtonites belongs to Pinales'
- 'Widdringtonites ungeri belongs to Widdringtonites' according to Endlicher 1847
- 'Widdringtonoxylon belongs to Coniferales'
- 'Widdringtonoxylon borealis belongs to Widdringtonoxylon' according to Penny 1947
- 'Wielandia is replaced by Wielandiella' according to Nathorst 1910
- 'Wielandia angustifolia belongs to Wielandia' according to Nathorst 1909
- 'Wielandia angustifolia is recombined as Wielandiella angustifolia' according to Nathorst 1910
- 'Wilkinsonia belongs to Plantae'
- 'Wilkinsonia filaminata belongs to Wilkinsonia' according to Mueller 1879
- 'Williamsoniella belongs to Bennettitales'
- 'Wilsonastrum belongs to Acritarcha'
- 'Wilsonastrum colonicum belongs to Wilsonastrum' according to Jansonius 1962
- 'Winchellia belongs to Berberidaceae'
- 'Winchellia triphylla belongs to Winchellia' according to Lesquereux 1893
- 'Winchellina belongs to Marattiaceae'
- 'Winchellina fascina belongs to Winchellina' according to Herzer 1893
- 'Windwardia belongs to Ginkgoales'
- 'Windwardia crookallii belongs to Windwardia' according to Florin 1936
- 'Withamia is replaced by Sewardia' according to Zeiller 1900
- 'Withamia belongs to Plantae'
- 'Withamia saportae belongs to Withamia' according to Seward 1895
- 'Withamia saportae is replaced by Sewardia latifolia' according to Zeiller 1900
- 'Withamia styriaca belongs to Withamia' according to Unger 1842
- 'Woburnia belongs to Angiospermae'
- 'Woburnia porosa belongs to Woburnia' according to Stopes 1912
- 'Wonnacottia belongs to Bennettitales'
- 'Wonnacottia crispa belongs to Wonnacottia' according to Harris 1942
- 'Woodwardites microlobus belongs to Woodwardites' according to Schenk 1865
- 'Woodwardites microlobus is recombined as Goeppertella microloba' according to Oishi and Yamasita 1936
- 'Woodworthia belongs to Araucariaceae'
- 'Woodworthia arizonica belongs to Woodworthia' according to Jeffrey 1910
- 'Xantholithus belongs to Coniferales'
- 'Xenicodinium belongs to Dinophyceae'
- 'Xenicodinium densispinosum belongs to Xenicodinium' according to Klement 1960
- 'Xenikoon belongs to Dinophyceae'
- 'Xenocladia belongs to Cladoxylales'
- 'Xenocladia medullosina belongs to Xenocladia' according to Arnold 1940
- 'Xenophyton belongs to Plantae'
- 'Xenophyton radiculosa belongs to Xenophyton' according to Hick 1892
- 'Xenopteris belongs to Peltaspermales'
- 'Xenostrobus belongs to Plantae'
- 'Xenostrobus gothani belongs to Xenostrobus' according to Daber 1957
- 'Xenotheca belongs to Pteridospermophyta'
- 'Xenotheca devonica belongs to Xenotheca' according to Arber and Goode 1915
- 'Xenoxylon belongs to Pinales'
- 'Xiphophyllum is a nomen nudum'
- 'Xulinosprionites belongs to Angiospermae'
- 'Xylasclerotes belongs to Fungi'
- 'Xylasclerotes brasserti belongs to Xylasclerotes' according to Stach and Pickhardt 1957
- 'Xylocarya belongs to Anacardiaceae'
- 'Xylocarya tricularis belongs to Xylocarya' according to Reid and Chandler 1933
- 'Xylocaryon belongs to Plantae'
- 'Xylocaryon lockii belongs to Xylocaryon' according to Mueller 1875
- 'Xylois belongs to Plantae'
- 'Xylolithes is a nomen nudum'
- 'Xylomastixia belongs to Cornaceae'
- 'Xylomastixia lusatica belongs to Xylomastixia' according to Kirchheimer 1938
- 'Xylomides belongs to Fungi'
- 'Xylomites is replaced by Xylomides' according to Schimper 1869
- 'Xylomites umbilicatus belongs to Xylomites' according to Unger 1841
- 'Xylomites umbilicatus is recombined as Xylomides umbilicatus' according to Schimper 1869
- 'Xylophyllites belongs to Euphorbiaceae'
- 'Xylophyllites pelasgica belongs to Xylophyllites' according to Massalongo 1858
- 'Xylophyllum belongs to Cordaitales'
- 'Xylophyllum kuliki belongs to Xylophyllum' according to Zalessky 1927
- 'Xylopiaecarpum belongs to Anonaceae'
- 'Xylopiaecarpum eocaenicum belongs to Xylopiaecarpum' according to Rasky 1956
- 'Xylopsaronius belongs to Plantae'
- 'Xylopsaronius cottai belongs to Xylopsaronius' according to Corda 1910
- 'Xylopteris belongs to Pteridospermophyta'
- 'Yabeiella belongs to Cycadophyta'
- 'Yakia belongs to Pteridospermophyta'
- 'Yakia heterophylla belongs to Yakia' according to White 1929
- 'Yarravia belongs to Plantae'
- 'Yarravia oblonga belongs to Yarravia' according to Lang and Cookson 1935
- 'Yatesia belongs to Cycadophyta'
- 'Yatesia morrisii belongs to Yatesia' according to Morris and Carruthers 1870
- 'Yatsenkoxylon belongs to Coniferales'
- 'Yatsenkoxylon sibiricum belongs to Yatsenkoxylon' according to Shilkina 1963
- 'Yavorskia belongs to Plantae'
- 'Yavorskia mungatica belongs to Yavorskia' according to Radchenko 1936
- 'Yezonia belongs to Gymnospermophyta'
- 'Yezonia vulgaris belongs to Yezonia' according to Stopes and Fujii 1910
- 'Yezopteris belongs to Cyatheaceae'
- 'Yezopteris polycycloides belongs to Yezopteris' according to Ogura 1930
- 'Yezostrobus belongs to Coniferales'
- 'Yezostrobus oliverii belongs to Yezostrobus' according to Stopes and Fujii 1910
- 'Yorkia belongs to Poales'
- 'Yorkia gramineoides belongs to Yorkia' according to Ward 1900
- 'Yubaria belongs to Angiospermae'
- 'Yubaria invaginata belongs to Yubaria' according to Ogura 1932
- 'Yuccites belongs to Plantae'
- 'Yuccites microlepis belongs to Yuccites' according to Martius 1822
- 'Yuknessia belongs to Chlorophyceae'
- 'Zalesskya belongs to Osmundaceae'
- 'Zalesskya gracilis belongs to Zalesskya' according to Kidston and Gwynne-Vaughan 1908
- 'Zalesskyella belongs to Pteridophyta'
- 'Zalesskyella bifurcata belongs to Zalesskyella' according to Chirkova 1939
- 'Zalesskyoderma belongs to Plantae'
- 'Zalesskyoderma tomiana belongs to Zalesskyoderma' according to Chirkova-Zalesskaia 1964
- 'Zamia feneonis belongs to Zamia' according to Brongniart 1828
- 'Zamia feneonis is recombined as Dioonites feneonis' according to Miquel 1851
- 'Zamia gigas is recombined as Zamites gigas' according to Morris 1843
- 'Zamia gigas belongs to Zamia' according to Lindley and Hutton 1831
- 'Zamia gigas is recombined as Williamsonia gigas' according to Carruthers 1870
- 'Zamia macrophylla belongs to Zamia' according to Lindley and Hutton 1834
- 'Zamia taxina belongs to Zamia' according to Lindley and Hutton 1835
- 'Zamia taxina is recombined as Palaeozamia taxina' according to Endlicher 1836
- 'Zamioidea belongs to Coniferophyta'
- 'Zamiolepis is a nomen nudum'
- 'Zamiophyllum belongs to Cycadophyta'
- 'Zamiophyllum buchianum belongs to Zamiophyllum' according to Ettingshausen 1890
- 'Zamiopsis belongs to Pteridophyta'
- 'Zamiopsis pinnatifida belongs to Zamiopsis' according to Fontaine 1889
- 'Zamiopteris belongs to Glossopteridaceae'
- 'Zamiopteris glossopteroides belongs to Zamiopteris' according to Schmalhausen 1879
- 'Zamiostrobus belongs to Coniferales'
- 'Zamiostrobus macrocephalus belongs to Zamiostrobus' according to Endlicher 1836
- 'Zamiphyllum belongs to Plantae'
- 'Zamiphyllum sambiense belongs to Zamiphyllum' according to Caspary 1907
- 'Zamites belongs to Cycadophyta'
- 'Zamites distans belongs to Zamites' according to Presl 1838
- 'Zamites distans is recombined as Podozamites distans' according to Braun 1843
- 'Zanichelliopsis is a nomen nudum'
- 'Zanichelliopsis repens belongs to Zanichelliopsis' according to Massalongo 1851
- 'Zanichelliopsis repens is recombined as Halochloris repens' according to Stiehler 1869
- 'Zearamosus belongs to Plantae'
- 'Zearamosus elleria belongs to Zearamosus' according to Webster 1920
- 'Zeilleria belongs to Pteridospermophyta'
- 'Zeilleria delicatula belongs to Zeilleria' according to Sternberg 1884
- 'Zeilleropteris belongs to Gigantopteridales'
- 'Zeilleropteris yunnanensis belongs to Zeilleropteris' according to Koidzumi 1936
- 'Zeites is a nomen nudum'
- 'Zeugophyllites calamoides is recombined as Zygophillites calamoides' according to Keferstein 1834
- 'Zeugophyllites calamoides belongs to Zeugophyllites' according to Brongniart 1828
- 'Zimmermannia belongs to Plantae'
- 'Zimmermannia eleutherophylloides belongs to Zimmermannia' according to Gothan and Zimmerman 1932
- 'Zimmermannioxylon belongs to Calamitaceae'
- 'Zimmermannioxylon multangulare belongs to Zimmermannioxylon' according to Leistikow 1962
- 'Zimmermannitheca belongs to Pteridospermophyta'
- 'Zimmermannitheca cupulaeformis belongs to Zimmermannitheca' according to Remy and Remy 1959
- 'Zingiberites belongs to Scitamineae'
- 'Zingiberites multinervis belongs to Zingiberites' according to Heer 1859
- 'Zingiberoideophyllum belongs to Zingiberaceae'
- 'Zingiberoideophyllum liblarense belongs to Zingiberoideophyllum' according to Kraeusel and Weyland 1954
- 'Zippea belongs to Plantae'
- 'Zippea disticha belongs to Zippea' according to Corda 1845
- 'Zittelia belongs to Leguminosae'
- 'Zittelia elegans belongs to Zittelia' according to Felix 1882
- 'Zittelina elegans belongs to Zittelina' according to Morellet and Morellet 1913
- 'Zizyphites belongs to Plantae'
- 'Zizyphoides belongs to Rhamnaceae'
- 'Zizyphoides columbi belongs to Zizyphoides' according to Heer 1935
- 'Zizyphus undulatus belongs to Zizyphus' according to Ettingshausen 1877
- 'Zizyphus undulatus is recombined as Helobiaephyllum undulatum' according to Rueffle 1963
- 'Zollernioxylon belongs to Plantae'
- 'Zollernioxylon sommeri belongs to Zollernioxylon' according to Mussa 1959
- 'Zonarides belongs to Ginkgophyta'
- 'Zonarides digitatus belongs to Zonarides' according to Brongniart 1869
- 'Zonarites belongs to Plantae'
- 'Zonooidium belongs to Acritarcha'
- 'Zonopleura belongs to Plantae'
- 'Zonopteris belongs to Pteridophyta'
- 'Zonopteris goepperti belongs to Zonopteris' according to Debey and Ettingshausen 1859
- 'Zonosphaeridium belongs to Acritarcha'
- 'Zonotrichites belongs to Plantae'
- 'Zonotrichites lissaviensis belongs to Zonotrichites' according to Bornemann 1887
- 'Zoogleites belongs to Problematica'
- 'Zoogleites elaverensis belongs to Zoogleites' according to Bertrand 1898
- 'Zoophycos caputmedusae belongs to Zoophycos' according to Massalongo 1855
- 'Zosterites belongs to Monocotyledonae'
- 'Zosterites is a nomen nudum'
- 'Zosterophyllum is a nomen nudum'
- 'Zosterophyllum belongs to Psilophytophyta'
- 'Zuberia belongs to Plantae'
- 'Zygophillites belongs to Coniferales'
- 'Zygophyllocarpum belongs to Zygophyllaceae'
- 'Zygophyllocarpum rottense belongs to Zygophyllocarpum' according to Weyland 1938
- 'Zygopteridaceae belongs to Coenopteridales'
- 'Zygopteris belongs to Coenopteridales'
- 'Zygopteris brongniarti belongs to Zygopteris' according to Renault 1869
- 'Zygopteris brongniarti is recombined as Ankyropteris brongniarti' according to Stenzel 1889
- 'Zygopteris kidstoni belongs to Zygopteris' according to Bertrand 1911
- 'Zygopteris kidstoni is recombined as Protoclepsydropsis kidstoni' according to Hirmer 1927
- 'Zygopteris tubicaulis belongs to Zygopteris' according to Goeppert 1852
- 'Zygopteris tubicaulis is recombined as Etapteris tubicaulis' according to Bertrand 1907
- 'Zygosporites belongs to Plantae'
- 'Zygosporites brevips belongs to Zygosporites' according to Williamson 1880
- 'Zygrhablithus bijugatus belongs to Zygrhablithus' according to Deflandre 1959