Page author: Don Knoke
Cirsium brevifolium
Palouse thistle
WTU specimens
Other herbaria

Distribution: Southeast Washington, northeast Oregon and adjacent Idaho

Habitat: Grasslands at low elevations

Flowers: June - October

Origin: Native

Conservation Status: Not of concern

Description:
General:

Stout, short-lived perennial spreading from creeping roots, branched above or sometimes below the surface, 3-12 dm. tall.

Leaves:

Leaves up to 3 dm. long, coarsely toothed to pinnatifid, the lobes ovate or deltoid, usually over 7mm. wide, the margins spiny; the leaves green above, but somewhat white-woolly beneath.

Flowers:

Heads several, at the ends of the branches; involucre 2-3.5 mm. high, its bracts well imbricate, with glandular-glutinous dorsal ridges, the inner bracts pointed at the tip, the others with spines 3-5 mm. long; flowers all tubular, white to cream; receptacle densely bristly.

Fruits:

Achenes 3-5 mm. long, light brown.

Accepted Name:
Cirsium brevifolium Nutt.
Publication: Trans. Amer. Philos. Soc., n. s. 7: 421. 1841. 1841.

Synonyms & Misapplications:
Cirsium palousense (Piper) Piper
Additional Resources:

PNW Herbaria: Specimen records of Cirsium brevifolium in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Cirsium brevifolium checklist entry.

E-Flora BC: Cirsium brevifolium atlas page.

CalPhotos: Cirsium brevifolium photos.

USDA Plants: Cirsium brevifolium information.

9 photographs:
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