Arnica gracilis is a North American species of flowering plant in the family Asteraceae, known by the common name smallhead arnica.Flora of North America, Smallhead arnica, Arnica gracilisRydberg, Per Axel 1897. Bulletin of the Torrey Botanical Club 24(6): 297 It is native to western Canada (Alberta, British Columbia) and the northwestern United States (Washington, Oregon, Idaho, Montana, Wyoming, north-central Colorado (Jackson County), and northern Utah (Cache, Summit, + Daggett Counties).Biota of North America Program 2014 county distribution map
Arnica gracilis is an herb up to 30 cm (12 inches) tall. Flower heads are yellow, with both ray florets and disc florets.
References
External links Paul Slichter, The Arnicas of Mt. Adams (Washington State), Slender Arnica, Mountain Arnica Arnica gracilis Eastern Washington University, Flora of Eastern Washington and Adjacent Idaho