Alder (Alnus) is a biological genus in the family Betulaceae (Alder) and order Fagales.
Alnus pendula
Alnus trabeculosa
Alnus X fallacina
Alnus oblongifolia
Alnus glutinosa
Alnus incana
Alnus viridis
Alnus serrulata
Alnus cordata
Alnus japonica
Alnus nepalensis
Alnus rubra
Alnus rhombifolia
Alnus maritima
Alnus
Betula
Corylus
Ostrya
Carpinus