alnus
Alder
Betulaceae
alnus
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Accepted Species
| Subgenus Alnus | |
| acuminata | Andean alder |
| acuminata ssp. arguta | Guatemalan alder |
| acuminata ssp. glabrata | Durango alder |
| cordata | Italian alder |
| cremastogyne | Long-stalked alder |
| djavanshirii | Dodangeh alder |
| dolichocarpa | Mazandaran alder |
| fauriei | Honshu alder |
| ferdinandii-coburgii | Ferdinand's alder |
| formosana | Taiwan alder |
| glutinosa | Common black alder |
| glutinosa ssp. antitaurica | Turkish black alder |
| glutinosa ssp. barbata | Caucasian black alder |
| glutinosa ssp. betuloides | Birchleaf black alder |
| henryi | Taipei alder |
| hirsuta | Manchurian alder |
| incana | Grey alder |
| incana ssp. kolaensis | Scandinavian alder |
| incana ssp. rugosa | Speckled alder |
| incana ssp. tchangbokii | Korean grey alder |
| incana ssp. tenuifolia | Thinleaf alder |
| inokumae | Littleleaf mountain alder |
| japonica | Japanese alder |
| jorullensis | Mexican alder |
| jorullensis ssp. lutea | Yellow alder |
| lanata | Woolly alder |
| lusitanica | Iberian alder |
| maritima | Delmarva seaside alder |
| maritima ssp. georgiensis | Georgia seaside alder |
| maritima ssp. oklahomensis | Oklahoma seaside alder |
| matsumurae | Notched alder |
| nepalensis | Nepal alder |
| nitida | West Himalayan alder |
| oblongifolia | Arizona alder |
| orientalis | Oriental alder |
| paniculata | Korean alder |
| rhombifolia | White alder |
| rohlenae | Dinaric alder |
| rubra | Red alder |
| serrulata | Hazel alder |
| serrulatoides | Japanese river alder |
| sibirica | Siberian alder |
| subcordata | Caucasian alder |
| trabeculosa | Cherryleaf alder |
| Subgenus Alnobetula | |
| alnobetula | European green alder |
| alnobetula ssp. crispa | American mountain alder |
| alnobetula ssp. fruticosa | Siberian green alder |
| alnobetula ssp. mandshurica | Manchurian green alder |
| alnobetula ssp. maximowiczii | Russian mountain alder |
| alnobetula ssp. sinuata | Sitka alder |
| betulifolia | Birchleaf alder |
| firma | Japanese mountain alder |
| hakkodensis | Monkey alder |
| pendula | Princess alder |
| sieboldiana | Siebold alder |
| vermiculata | Snowy alder |