Arnica arcana A. Nelson
Arnica arcana A. Nelson is a synonym sensu Downie & Denford, 1988 of:
Arnica lonchophylla Greene, an accepted species name sensu FNA Ed. Comm., 2006c.
Arnica arcana A. Nelson is a synonym sensu Downie & Denford, 1988 of:
Arnica lonchophylla Greene, an accepted species name sensu FNA Ed. Comm., 2006c.