Arnica louiseana subsp. frigida var. pilosa Maguire
Arnica louiseana subsp. frigida var. pilosa 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.