Arnica chamissonis
leafy arnica, meadow arnica, narrowleaf arnica, silvery arnica, leafy leapordbane
WTU specimens
Other herbaria

Distribution: Occurring in the Cascades and northeastern corner of Washington; Alaska south to California, east across Canada and to the Rockies in the U.S.

Habitat: Meadows and wet places at moderate elevations.

Flowers: June-September

Origin: Native

Conservation Status: Not of concern

Description:
General:

Perennial from long, naked rhizomes; stems solitary, 2-10 dm. tall; herbage variously pubescent, becoming glandular above.

Leaves:

Leaves opposite, sessile, 5-10 pairs, only slightly reduced upward; leaves lanceolate to oblanceolate, entire or slightly toothed, 5-30 cm. long and 1-4 cm. wide.

Flowers:

Heads several, the involucre 8-12 mm. high, the herbaceous bracts sub-equal, usually obtuse, with a tuft of long, white hairs; ray flowers pale yellow, usually 13, pistillate, 1.5-2 cm. long; disk flowers yellow, perfect; pappus somewhat tawny, barbellate.

Fruits:

Achene with short hairs, somewhat glandular.

Accepted Name:
Arnica chamissonis Less.
Publication: Linnaea. 6: 238. 1831.

Synonyms & Misapplications:
Arnica chamissonis Less. ssp. chamissonis [HC]
Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire [HC]
Arnica chamissonis Less. ssp. incana (A. Gray) Maguire
Arnica chamissonis Less. var. andina (Nutt.) Ediger & T.M. Barkl.
Arnica chamissonis Less. var. chamissonis
Arnica chamissonis Less. var. foliosa (Nutt.) Maguire [HC]
Arnica chamissonis Less. var. incana (A. Gray) Hultén [HC]
Arnica chamissonis Less. var. interior Maguire [HC]
Arnica chamissonis Less. var. maguirei (A. Nels.) Maguire [HC]
Additional Resources:

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

WA Flora Checklist: Arnica chamissonis checklist entry.

E-Flora BC: Arnica chamissonis atlas page.

CalPhotos: Arnica chamissonis photos.

USDA Plants: Arnica chamissonis information.

28 photographs:
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