About Arnica mollis Hook.
Arnica mollis Hook. is a perennial herb that produces one or more hairy, glandular stems that are mostly unbranched, reaching 15 to 70 centimeters in height. The stems hold 2 to 4 pairs of leaves, most located along the lower half of the stem; each leaf is oblong in shape and measures 4 to 20 centimeters long. The inflorescence bears between one and seven daisylike flower heads, which contain 10 to 22 ray florets surrounding yellow disc florets. The fruit produced is a cypsela with a brownish pappus. This species is distributed across parts of Canada, including Alberta, British Columbia, Quebec, Nunavut, Yukon, and the Northwest Territories, and across the western United States, extending south to Tulare County, California, and Rio Arriba County, New Mexico. A small disjunct population of the species may also occur in Coös County, New Hampshire. As documented in the Flora of North America, Arnica mollis typically grows in wet meadows, conifer forests, stream banks, and areas with melting snow, at elevations between 1,000 and 4,000 meters (3,300 to 13,100 feet) above sea level.
