Page authors: Don Knoke, David Giblin
Arnica lanceolata
clasping arnica, stream bank arnica
WTU specimens
Other herbaria
WTU images

Distribution: Occurring on both sides of the Cascades crest in Washington, including the Olympic Mountains and the northeastern region; Alaska to California, east to the Rocky Mountains, also in northeastern North America.

Habitat: Streambanks, moist woods and meadows from middle elevations to the subalpine.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Perennial from a freely-rooting rhizome, 3-8 dm. tall, more or less glandular and hairy.

Leaves:

Cauline leaves 5-12 pairs, not much reduced upward, narrowly lance-elliptic or lance-ovate, sessile, more or less toothed, 5-12 cm. long and 1.2-6 cm. wide.

Flowers:

Heads several; involucre 9-15 mm. high, its bracts sharply pointed; rays 8-14, pale yellow, 1-2 cm. long; pappus tawny, sub-plumose.

Fruits:

Achenes sparsely hirsute and sometimes glandular.

Accepted Name:
Arnica lanceolata Nutt.
Publication: Trans. Amer. Philos. Soc., n. s. 7: 407. 1841.

Synonyms & Misapplications:
(none provided)
Infraspecies:
ssp. prima – clasping arnica, streambank arnica, streambank leopardbane    Occurring on both sides of the Cascades crest in Washington, including the Olympic Mountains and the northeastern region; Alaska to California, east to the Rocky Mountains, also in northeastern North America.
Additional Resources:

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

WA Flora Checklist: Arnica lanceolata checklist entry.

E-Flora BC: Arnica lanceolata atlas page.

CalPhotos: Arnica lanceolata photos.

USDA Plants: Arnica lanceolata information.

28 photographs:
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