Gymnocarpium dryopteris var. pumilum (de Candolle) B. Boivin

Gymnocarpium dryopteris var. pumilum (de Candolle) B. Boivin is a synonym sensu FNA Ed. Comm., 1993 of:

Gymnocarpium robertianum (Hoffmann) Newman, an accepted species name sensu FNA Ed. Comm., 1993.