Salicicola |
Alnus glutinosa (L.) Gaertner
European black alder
Introduced
|
Alnus incana (L.) Moench ssp. incana
grey alder
Exotic
|
Alnus incana ssp. rugosa (Du Roi) R.T.Clausen
= Alnus rugosa
Du Roi
= Alnus rugosa var. americana
(Regel) Fern.
speckled alder
Native
|
Alnus incana ssp. tenuifolia (Nutt.) Breitung
= A. tenuifolia
Nutt.
mountain alder, thinleaf alder
Exotic
|
Alnus serrulata (Ait.) Willd.
smooth alder, common alder
Native
|