Opinions from H. D. MacGinitie 1941
- 'Acalypha belongs to Euphorbiaceae'
- 'Acalypha aequalis belongs to Acalypha'
- 'Acer belongs to Aceraceae'
- 'Acer aequidentatum belongs to Acer'
- 'Aceraceae belongs to Sapindales'
- 'Ailanthus belongs to Simarubaceae'
- 'Ailanthus lesquereuxi belongs to Ailanthus'
- 'Alnus belongs to Betulaceae'
- 'Alnus operia belongs to Alnus'
- 'Anacardiaceae belongs to Sapindales'
- 'Angiospermae belongs to Spermatophyta'
- 'Apocynaceae belongs to Contortae'
- 'Aralia angustiloba is recombined as Platanophyllum angustiloba'
- 'Aralia whitneyi is recombined as Platanophyllum whitneyi'
- 'Artocarpus belongs to Moraceae'
- 'Asclepiadaceae belongs to Contortae'
- 'Asclepiadites belongs to Asclepiadaceae'
- 'Asclepiadites laterita belongs to Asclepiadites'
- 'Betulaceae belongs to Fagales'
- 'Burseraceae belongs to Geraniales'
- 'Calycites belongs to Compositae'
- 'Calycites mikanoides belongs to Calycites'
- 'Calyptranthes belongs to Myrtaceae'
- 'Calyptranthes myrtifolia belongs to Calyptranthes'
- 'Campanulatae belongs to Dicotyledones'
- 'Canarium belongs to Burseraceae'
- 'Caprifoliaceae belongs to Rubiales'
- 'Carpites egregia belongs to Carpites'
- 'Carya belongs to Juglandaceae'
- 'Carya sessilis belongs to Carya'
- 'Castanopsis belongs to Fagaceae'
- 'Castanopsis belongs to '
- 'Castanopsis chrysophylloides is recombined as Tabernaemontana chrysophylloides'
- 'Cedrela belongs to Meliaceae'
- 'Cedrela eolancifolia belongs to Cedrela'
- 'Celastraceae belongs to Sapindales'
- 'Celastrus belongs to Celastraceae'
- 'Celastrus preangulata belongs to Celastrus'
- 'Cercidiphyllaceae belongs to Ranales'
- 'Cercidiphyllum belongs to Cercidiphyllaceae'
- 'Chaetoptelea belongs to Ulmaceae'
- 'Chrysobalanus belongs to Rosaceae'
- 'Chrysobalanus eoicaco belongs to Chrysobalanus'
- 'Cinnamomum belongs to Lauraceae'
- 'Cinnamomum acrodromum belongs to Cinnamomum'
- 'Cissus belongs to Vitaceae'
- 'Cissus pyriformis belongs to Cissus'
- 'Combretaceae belongs to Myrtiflorae'
- 'Compositae belongs to Campanulatae'
- 'Contortae belongs to Dicotyledones'
- 'Cornaceae belongs to Umbelliflorae'
- 'Cornus belongs to Cornaceae'
- 'Cornus kelloggii belongs to Cornus'
- 'Cryptocarya belongs to Lauraceae'
- 'Cryptocarya praesamarensis belongs to Cryptocarya'
- 'Cupania belongs to Sapindaceae'
- 'Cupania oregona belongs to Cupania'
- 'Cyatheaceae belongs to Filicopsida'
- 'Cyatheaceae belongs to Filicales'
- 'Cycadaceae belongs to Cycadales'
- 'Cycadales belongs to Gymnospermae'
- 'Dalbergia belongs to Leguminosae'
- 'Dalbergia rubra belongs to Dalbergia'
- 'Desmodium belongs to Leguminosae'
- 'Desmodium indentum belongs to Desmodium'
- 'Dicotyledones belongs to Angiospermae'
- 'Diospyros belongs to Ebenaceae'
- 'Diospyros retinervis belongs to Diospyros'
- 'Dryophyllum longipetiolatum is recombined as Castanopsis longipetiolatum'
- 'Ebenaceae belongs to Ebenales'
- 'Ebenales belongs to Dicotyledones'
- 'Engelhardia belongs to Juglandaceae'
- 'Engelhardia nevadensis belongs to Engelhardia'
- 'Engelhardtia nevadensis belongs to Engelhardtia'
- 'Euphorbiaceae belongs to Geraniales'
- 'Fagaceae belongs to Fagales'
- 'Fagales belongs to Dicotyledones'
- 'Ficus belongs to Moraceae'
- 'Ficus goshenensis belongs to Ficus'
- 'Ficus sordida is recombined as Phytocrene sordida'
- 'Filicales belongs to Filicinae'
- 'Filicinae belongs to Pteridophyta'
- 'Fraxinus belongs to Oleaceae'
- 'Fraxinus yubaensis belongs to Fraxinus'
- 'Geraniales belongs to Dicotyledones'
- 'Gordonia belongs to Theaceae'
- 'Gymnospermae belongs to Spermatophyta'
- 'Hamamelidaceae belongs to Rosales'
- 'Hamamelites belongs to Hamamelidaceae'
- 'Hemitelia belongs to Cyatheaceae'
- 'Hemitelia pinnata belongs to Hemitelia'
- 'Hydrangea belongs to Saxifragaceae'
- 'Hydrangea californica belongs to Hydrangea'
- 'Hyperbaena belongs to Menispermaceae'
- 'Hyperbaena diforma belongs to Hyperbaena'
- 'Inga belongs to Leguminosae'
- 'Inga ionensis belongs to Inga'
- 'Juglandaceae belongs to Juglandales'
- 'Juglandales belongs to Dicotyledones'
- 'Juglans californica is recombined as Canarium californicum'
- 'Juglans egregia is recombined as Gordonia egregia'
- 'Juglans laurinea is recombined as Phyllites laurinea'
- 'Lauraceae belongs to Ranales'
- 'Laurophyllum belongs to Lauraceae'
- 'Laurophyllum litseaefolia belongs to Laurophyllum'
- 'Laurus fremontensis is recombined as Laurophyllum fremontensis'
- 'Leguminosae belongs to Rosales'
- 'Liliaceae belongs to Liliales'
- 'Liliales belongs to Monocotyledones'
- 'Liquidambar belongs to Hamamelidaceae'
- 'Lygodium belongs to Schizaeaceae'
- 'Lygodium kaulfussi belongs to Lygodium' according to Heer 1861
- 'Lygodium kaulfussi is corrected as Lygodium kaulfussii and belongs to Lygodium'
- 'Magnolia belongs to Magnoliaceae'
- 'Magnoliaceae belongs to Ranales'
- 'Mallotus belongs to Euphorbiaceae'
- 'Mallotus riparius belongs to Mallotus'
- 'Meliaceae belongs to Geraniales'
- 'Meliosma belongs to Sabiaceae'
- 'Meliosma truncata belongs to Meliosma'
- 'Menispermaceae belongs to Ranales'
- 'Monocotyledones belongs to Angiospermae'
- 'Moraceae belongs to Urticales'
- 'Myrica lessigiana is recombined as Artocarpus lessigiana'
- 'Myrtaceae belongs to Myrtiflorae'
- 'Myrtiflorae belongs to Dicotyledones'
- 'Nelumbium belongs to Nymphaeaceae'
- 'Nelumbium lacunosum belongs to Nelumbium'
- 'Neolitsea belongs to Lauraceae'
- 'Neolitsea lata belongs to Neolitsea'
- 'Nerium belongs to Apocynaceae'
- 'Nerium hinoidea belongs to Nerium'
- 'Nymphaeaceae belongs to Ranales'
- 'Nyssa belongs to Nyssaceae'
- 'Nyssa californica belongs to Nyssa'
- 'Nyssaceae belongs to Myrtiflorae'
- 'Oleaceae belongs to Contortae'
- 'Palmae belongs to Palmales'
- 'Palmales belongs to Monocotyledones'
- 'Parietales belongs to Dicotyledones'
- 'Persea belongs to Lauraceae'
- 'Persea praelingue belongs to Persea'
- 'Phyllites cordiaefolia belongs to Phyllites'
- 'Phyllites daturaefolia belongs to Phyllites'
- 'Phytocrene belongs to Icacinaceae'
- 'Platanaceae belongs to Rosales'
- 'Platanophyllum belongs to Platanaceae'
- 'Platanus belongs to Platanaceae'
- 'Platanus coloradensis belongs to Platanus'
- 'Pongamia belongs to Leguminosae'
- 'Pongamia ovata belongs to Pongamia'
- 'Quercophyllum platanoides belongs to Quercophyllum'
- 'Quercus belongs to Fagaceae'
- 'Quercus eoxalapensis belongs to Quercus'
- 'Quercus voyana is recombined as Hamamelites voyana'
- 'Ranales belongs to Dicotyledones'
- 'Rhamnaceae belongs to Rhamnales'
- 'Rhamnales belongs to Dicotyledones'
- 'Rhamnidium belongs to Rhamnaceae'
- 'Rhamnidium chaneyi belongs to Rhamnidium'
- 'Rhamnus belongs to Rhamnaceae'
- 'Rhamnus calyptus belongs to Rhamnus'
- 'Rhamnus plenus belongs to Rhamnus'
- 'Rhus belongs to Anacardiaceae'
- 'Rhus mixta belongs to Rhus'
- 'Rhus myricaefolia is recombined as Thouinopsis myricaefolia'
- 'Rosaceae belongs to Rosales'
- 'Rosales belongs to Dicotyledones'
- 'Rubiales belongs to Dicotyledones'
- 'Sabalites belongs to Palmae'
- 'Sabalites californicus belongs to Sabalites'
- 'Sabiaceae belongs to Sapindales'
- 'Salicaceae belongs to Salicales'
- 'Salicales belongs to Dicotyledones'
- 'Salix belongs to Salicaceae'
- 'Salix ionensis belongs to Salix'
- 'Sapindaceae belongs to Sapindales'
- 'Sapindales belongs to Dicotyledones'
- 'Saxifragaceae belongs to Rosales'
- 'Schizaeaceae belongs to Filicales'
- 'Simaroubaceae [misspelled as Simarubaceae] belongs to Geraniales'
- 'Smilax belongs to Liliaceae'
- 'Smilax labidurommae belongs to Smilax'
- 'Strongylodon belongs to Leguminosae'
- 'Strongylodon falcata belongs to Strongylodon'
- 'Tabernaemontana belongs to Apocynaceae'
- 'Terminalia belongs to Combretaceae'
- 'Terminalia estamina belongs to Terminalia'
- 'Theaceae belongs to Parietales'
- 'Thouinopsis belongs to Sapindaceae'
- 'Ulmaceae belongs to Urticales'
- 'Ulmus pseudofulva is recombined as Chaetoptelea pseudofulva'
- 'Umbelliflorae belongs to Dicotyledones'
- 'Urticales belongs to Dicotyledones'
- 'Vauquelinia belongs to Rosaceae'
- 'Vauquelinia exigua belongs to Vauquelinia'
- 'Viburnum belongs to Caprifoliaceae'
- 'Viburnum variabilis belongs to Viburnum'
- 'Vitaceae belongs to Rhamnales'
- 'Vouapa belongs to Leguminosae'
- 'Vouapa geminifolia belongs to Vouapa'
- 'Zamites belongs to Cycadaceae'
- 'Zamites californica belongs to Zamites'