Arnica lanceolata ssp. prima—clasping arnica. A, lanceolata ssp. prima in grows in western North America whil A. lanceolata ssp. lanceolata grows in northeastern America. One can purchase Arnica gel at Trader Joe's. It is used as an analgesic in much the same way as Aspercreme. Some people swear by it although studies have shown it to be ineffective. Photographed at Regional Parks Botanic Garden located in Tilden Regional Park near Berkeley, CA.
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