Classification of the genus Alnus

G. Alnus Miller 1754 [alder]
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†Alnus alaskana Newberry 1882
†Alnus americana Ettingshausen 1883
†Alnus auraria Knowlton and Cockerell 1919
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Invalid names: Alnus rugosa Lesquereux 1888 [replaced]
†Alnus carpinifolia Lesquereux 1888
†Alnus carpinoides Lesquereux 1883
Alnus cordata Duby 1828
†Alnus corrallina Lesquereux 1883
†Alnus corylina Lesquereux 1882
†Alnus grandiflora Newberry 1882
†Alnus grewiopsis Ward 1885
†Alnus inaequilateralis Lesquereux 1875
†Alnus kefersteinii Göppert 1837
†Alnus macrodonta Knowlton 1902
†Alnus muelleri Ettingshausen 1883
Alnus nitida Endlicher 1847
†Alnus operia MacGinitie 1941
†Alnus parvifolia Berry 1926
†Alnus poolensis Chandler 1963
†Alnus praecordata Cockerell 1908
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Invalid names: Alnus cordata Lesquereux 1883 [replaced]
†Alnus rhamnifolia Nuttall 1911
Alnus rubra Bongard 1833
†Alnus rugosa Koch 1872
†Alnus scalariforme Srivastava and Suzuki 2001
†Alnus serrata Newberry 1868
†Alnus serrulata Newberry 1898