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2011 Anthony Baniaga   cc-publicdomain

Arnica sororia (Twin Arnica) is a species of perennial herb in the family Asteraceae. They are native to Canada and The Contiguous United States. Flowers are visited by Yellow Head Bumble Bee. Individuals can grow to 5 dm.

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EOL has data for 12 attributes, including:

Known occurrences, collected specimens and observations of twin arnica. View this species on GBIF