Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, and the Great Lakes region.
Habitat: Light forest understory, openings, and edge, from low elevations to the subalpine.
Conservation Status: Not of concern
Perennial from long rhizomes, 1-6 dm. tall, pubescent, stems solitary or a few clustered together.
Long-petiolate, cordate basal leaves commonly on separate short shoots; cauline leaves 2-4 pairs, petiolate, reduced upward, the more or less cordate blade 4-12 cm. long and 3-9 cm. wide, usually toothed.
Heads 1-3, rarely more, often single; involucre 13-20 mm. high, covered with long, spreading, white hairs, and usually glandular as well; rays 10-15, 1.5-3 cm. long, yellow; pappus white, barbellate.
Achenes uniformly short-hairy or glandular or both.
The similar Arnica latifolia has smaller and usually more heads, and the leaves and achenes are usually glabrous.