Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Breitung
Publication: Amer. Midl. Naturalist. 58: 25. 1957. 1957.
Alnus incana (L.) Moench var. occidentalis (Dippel) C.L. Hitchc. [HC]
Alnus incana (L.) Moench var. virescens S. Watson
Alnus occidentalis Dippel
Alnus ×purpusii Callier
Alnus rugosa (Du Roi) Spreng. var. occidentalis (Dippel) C.L. Hitchc.
Alnus tenuifolia Nutt. [VPBC1]
Alnus tenuifolia Nutt. var. occidentalis (Dippel) Collier [VPBC, VPBC]