Classification of the genus Rhamnus
G. Rhamnus Linnaeus 1753 [buckthorn]
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Rhamnus acuminatifolius Weber 1872
†Rhamnus acuta Heer 1882
†Rhamnus alaternoides Heer 1859
†Rhamnus belmontensis Knowlton and Cockerell 1919
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Invalid names: Rhamnus elegans Newberry 1868 [replaced]
Rhamnus californica Eschscholtz 1849
†Rhamnus calyptus MacGinitie 1941
†Rhamnus cleburni Lesquereux 1872
†Rhamnus coushatta Berry 1916
†Rhamnus crenatulus Knowlton and Cockerell 1919
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Invalid names: Rhamnus crenatus Lesquereux 1888 [replaced]
Rhamnus crenatus Sieboldt and Zuccarini 1843
†Rhamnus dechenii Weber 1852
†Rhamnus deformatus Lesquereux 1883
†Rhamnus deletus Heer 1871
Rhamnus elegans Humboldt et al. 1825
†Rhamnus eoligniticus Berry 1916
†Rhamnus eorectinervis Knowlton 1919
†Rhamnus eridani Unger 1850
†Rhamnus fischeri Lesquereux 1871
†Rhamnus florissantensis Cockerell 1908
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Invalid names: Rhamnus oleaefolius Lesquereux 1883 [replaced]
†Rhamnus gaudini Heer 1859
†Rhamnus goldianus Lesquereux 1872
Rhamnus hemsleyana Schneider 1908
†Rhamnus inaequilateralis Lesquereux 1892
Rhamnus intermedius Steudel and Hochstetter 1827
†Rhamnus kansensis Knowlton and Cockerell 1919
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Invalid names: Rhamnus prunifolius Lesquereux 1883 [replaced]
†Rhamnus kirchneri Cockerell 1906
†Rhamnus lesquereuxi Berry 1918
†Rhamnus marginatus Lesquereux 1860
†Rhamnus meriani Heer 1873
†Rhamnus mudgei Lesquereux 1891
†Rhamnus newberryi Knowlton and Cockerell 1919
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Invalid names: Rhamnus parvifolius Newberry 1882 [replaced]
†Rhamnus novaecaesareae Berry 1903
†Rhamnus obovatus Lesquereux 1868
Rhamnus parvifolia Bunge 1835
†Rhamnus plenus MacGinitie 1937
†Rhamnus precalifornica Axelrod 1939
Rhamnus prunifolius Sieber 1841
Rhamnus purshiana De Candolle 1860
†Rhamnus puryearensis Berry 1916
†Rhamnus quilchensis Penhallow 1908
†Rhamnus rectinervis Heer
†Rhamnus revoluta Lesquereux 1891
†Rhamnus salicifolius Lesquereux 1868
†Rhamnus similis Lesquereux 1891
†Rhamnus tenax Lesquereux 1868
Rhamnus utilis Decaisne 1857
Rhamnus virgata Roxburgh 1824
†Rhamnus washakiensis Cockerell 1908
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Invalid names: Rhamnus intermedius Lesquereux 1871 [replaced]
†Rhamnus williardi Knowlton 1916
†Rhamnus woottonensis Knowlton 1918