Alnus rugosa var. americana (Regel) Fernald
Alnus rugosa var. americana (Regel) Fernald is a synonym sensu FNA Ed. Comm., 1997 of:
Alnus incana subsp. rugosa (Du Roi) R.T. Clausen, an accepted subspecies name sensu FNA Ed. Comm., 1997.
Alnus rugosa var. americana (Regel) Fernald is a synonym sensu FNA Ed. Comm., 1997 of:
Alnus incana subsp. rugosa (Du Roi) R.T. Clausen, an accepted subspecies name sensu FNA Ed. Comm., 1997.