| Name | Arnica rydbergii Greene |
| Authorship | Greene |
| Rank | Species |
| Placed in | Arnica Linnaeus |
| Citation | 1899 [17 Mar 1899] Pittonia 4(20): 36 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Arnica rydbergii Greene |
| Identification made in | [no date] (1) |
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