Arnica alpina var. attenuata (Greene) Ediger & Barkley

Arnica alpina var. attenuata (Greene) Ediger & Barkley is a synonym sensu FNA Ed. Comm., 2006c of:

Arnica angustifolia Vahl subsp. angustifolia, an accepted subspecies name sensu FNA Ed. Comm., 2006c.