Asteraceae | |
Arnica amplexifolia var. borealis
| (Rydb.) Maguire | Madroño 6(5): 154 | 1942 |
Asteraceae | |
Arnica amplexifolia subsp. prima
| Maguire | Madroño 6(5): 154–155 | 1942 |
Asteraceae | |
Arnica amplexifolia var. trina
| (A. Nelson) Maguire | Rhodora 41(490): 507 | 1939 |