Photo: Arnica chamissonis.

Flowering tops. MTT Karila research station, Mikkeli, Finland. Planted. 2002-08-13.
Arnica chamissonis Less. Engl.: American arnica, chamisso arnica, North American arnica. Deu.: Wiesen-Arnika. Sven.: vägarnika. Bot. syn.: Arnica foliosa Nutt.
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Photo: Arnica chamissonis.