Page author: David Giblin
Arnica rydbergii
Rydberg's arnica, subalpine arnica, subalpine leopardbane
WTU specimens
Other herbaria

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to northern California, east to Alberta and Colorado.

Habitat: Dry meadows and open slopes at high elevations in the mountains.

Flowers: July - August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Perennial from short, scaly rhizomes, the stems clustered, 1-3 dm. tall.

Leaves:

Basal leaves petiolate, oblanceolate, 3- to 5-nerved, frequently on separate short shoots; cauline leaves opposite, 3-4 pairs, oblanceolate to lanceolate, 3- to 5-nerved, concentrated on the lower part of the stem, 3-10 cm. long and 5-25 mm. wide.

Flowers:

Heads solitary or few, top-shaped; involucre 9-13 mm. high, its bracts pointed, glandular on the back with hairs on the margins; rays about 8, yellow, pistillate, 1-2 cm. long; disk flowers yellow, perfect; pappus white, barbellate.

Fruits:

Achene densely covered throughout with short, soft hairs

Accepted Name:
Arnica rydbergii Greene
Publication: Pittonia. 4: 36. 1899.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Arnica rydbergii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Arnica rydbergii checklist entry.

E-Flora BC: Arnica rydbergii atlas page.

CalPhotos: Arnica rydbergii photos.

USDA Plants: Arnica rydbergii information.

23 photographs:
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