Arnica aurantiaca Greene
Arnica aurantiaca Greene is a synonym sensu Downie & Denford, 1988 of:
Arnica rydbergii Greene, an accepted species name sensu FNA Ed. Comm., 2006c.
Arnica aurantiaca Greene is a synonym sensu Downie & Denford, 1988 of:
Arnica rydbergii Greene, an accepted species name sensu FNA Ed. Comm., 2006c.