Alnus alnobetula var. crispa (Aiton) H.J.P. Winkler

Alnus alnobetula var. crispa (Aiton) H.J.P. Winkler is a synonym sensu FNA Ed. Comm., 1997 of:

Alnus alnobetula subsp. crispa (Aiton) Raus, an accepted subspecies name sensu Greuter & Von Raab-Straube, 2011.