Page author: David Giblin
Arnica rydbergii
Rydberg's arnica, subalpine arnica, subalpine leopardbane
Specimens
Photos

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: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Apomixis, bumblebees, butterflies

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

OregonFlora: Arnica rydbergii information

E-Flora BC: Arnica rydbergii atlas page

CalPhotos: Arnica rydbergii photos

43 photographs:
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