Arnica louiseana subsp. frigida (C.A. Meyer ex Iljin) Maguire

Arnica louiseana subsp. frigida (C.A. Meyer ex Iljin) Maguire is a synonym sensu FNA Ed. Comm., 2006c of:

Arnica griscomii subsp. frigida (C.A. Meyer ex Iljin) S.J. Wolf, an accepted subspecies name sensu FNA Ed. Comm., 2006c.