Contains 5 accepted taxa overall.
Characteristics
Classification
Citation
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Species
| Scientific Name | Common Name | Status | Photos |
|---|---|---|---|
| Alnus alnobetula ssp. crispa | green alder | Native FAC (NWPL EMP) FAC (NWPL NCNE) SNR (State Rank) G5T5 (Global Rank) | |
| Alnus glutinosa | black alder, European alder | Not Native Naturalized FACW- (NWPL) FACW (NWPL EMP) FACW (NWPL NCNE) SNA (State Rank) GNR (Global Rank) | |
| Alnus incana ssp. rugosa | speckled alder | Native FACU (NWPL EMP) FACW (NWPL NCNE) S5 (State Rank) G5T5 (Global Rank) | |
| Alnus incana ssp. rugosa × A. serrulata = A. ×fallacina | deceptive alder | Native OBL (NWPL EMP) OBL (NWPL NCNE) SNA (State Rank) GNA (Global Rank) | |
| Alnus serrulata | smooth alder | Native FACW+, OBL (NWPL) OBL (NWPL EMP) OBL (NWPL NCNE) S5 (State Rank) G5 (Global Rank) |