- Alnus acuminata
- Alnus acuminata Kunth subsp. acuminata
- Alnus acuminata H.B.& K.
- Alnus acuminata Kunth subsp. arguta (Schltdl.) Furlow
- Alnus acuminata Kunth
- Alnus acuminata subsp. acuminata
- Alnus alnobetula
- Alnus alnobetula (Ehrh.) Hartig
- Alnus alnobetula (Ehrh.) K.Koch
- Alnus alnobetula (Ehrh.) K.Koch subsp. sinuata (Regel) Raus
- Alnus barbata
- Alnus barbata C.A.Mey.
- Alnus cordata
- Alnus cordata Desf.
- Alnus cordata ~sp
- Alnus cordata (Loisel.) Duby
- Alnus crispa
- Alnus crispa subsp. tenufolia
- Alnus crispa (Aiton) Pursh subsp. tenufolia
- Alnus firma
- Alnus firma Siebold & Zucc.
- Alnus glutinosa
- Alnus glutinosa (L.) Gaertn.
- Alnus glutinosa ~sp
- Alnus glutinosa 'imperialis'
- Alnus glutinosa (L.) Gaertn. subsp. barbata (C.A.Mey.) Yalt.
- Alnus henryi
- Alnus henryi C.K.Schneid.
- Alnus hirsuta
- Alnus hirsuta (Spach) Rupr.
- Alnus hirsuta (Spach) Turcz. ex Rupr.
- Alnus incana
- Alnus incana ~sp
- Alnus incana Willd.
- Alnus incana (L.) Moench subsp. tenuifolia (Nutt.) Breitung
- Alnus incana (L.) Moench subsp. rugosa (Du Roi) R. T. Clausen
- Alnus incana (L.) Moench
- Alnus incana Medic.
- Alnus incana (L.) Moench subsp. rugosa (Du Roi) R.T.Clausen
- Alnus incana (L.)Moench
- Alnus japonica
- Alnus japonica (Thunb.) Steud.
- Alnus jorullensis
- Alnus jorullensis Kunth subsp. lutea Furlow
- Alnus jorullensis Kunth
- Alnus mandshurica
- Alnus mandshurica (Callier ex C. K. Schneid.) Hand.-Mazz.
- Alnus maritima
- Alnus maritima (Marshall) Muhl. ex Nutt. subsp. oklahomensis J. A. Schrad. & W. R. Graves
- Alnus maritima (Marshall) Muhl. ex Nutt.
- Alnus maximowiczii
- Alnus maximowiczii Callier
- Alnus mayrii
- Alnus mayrii Callier ex C. K. Schneid. i Callier ex C. K. Schneid.
- Alnus nepalensis
- Alnus nepalensis D.Don
- Alnus nepalensis D. Don
- Alnus nitida
- Alnus nitida (Spach) Endl.
- Alnus oblongifolia
- Alnus oblongifolia Torr.
- Alnus orientalis
- Alnus orientalis Decne.
- Alnus pendula
- Alnus pendula Matsum.
- Alnus rhombifolia
- Alnus rhombifolia Nutt.
- Alnus rubra
- Alnus rubra Bong.
- Alnus rubra Bongard
- Alnus serrulata
- Alnus serrulata (Aiton) Willd.
- Alnus sieboldiana
- Alnus sieboldiana Matsum.
- Alnus sp.
- Alnus subcordata
- Alnus subcordata C.A.Mey.
- Alnus subcordata C. A. Mey.
- Alnus trabeculosa
- Alnus trabeculosa Hand.-Mazz.
- Alnus viridis
- Alnus viridis (Chaix) DC.
- Alnus viridis (Chaix) DC. subsp. sinuata (Regel) A. Love & D. Love
- Alnus viridis (Chaix) DC. subsp. crispa (Aiton) Turrill
- Alnus viridis (Chaix) DC. subsp. maximowiczii (Callier) D. Love
- Alnus viridis (Chaix) DC. subsp. fruticosa (Rupr.) Nyman