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2014 Richard Spellenberg   cc-by-nc-sa-3.0

Arnica rydbergii (Rydberg's Arnica) is a species of perennial herb in the family Asteraceae. They are native to The Contiguous United States and Canada. Flowers are visited by Epidemia dorcas florus, Colias scudderii, Milbert's Tortoiseshell, and Polites sabuleti draco. Individuals can grow to 3 dm.

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EOL has data for 11 attributes, including:

Known occurrences, collected specimens and observations of Rydberg's arnica from the Global Biodiversity Information Facility   GBIF provides free and open access to biodiversity data. View this species on GBIF