Onoclea struthiopteris var. pensylvanica (Willdenow) B. Boivin
Onoclea struthiopteris var. pensylvanica (Willdenow) B. Boivin is a synonym of:
Matteuccia struthiopteris var. pensylvanica (Willdenow) C.V. Morton, an accepted variety name sensu FNA Ed. Comm., 1993.