Page author: David Giblin
Chaenactis thompsonii
Thompson's pincushion

Distribution: Occurring east of the Cascades crest in Washington, where endemic to the Wenatchee Mountains.

Habitat: Open, usually rocky areas, at middle elevations.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Sensitive in Washington (WANHP)


Thinly woolly-canescent perennial from a branched, woody base and taproot, the numerous stems 1-3 dm. tall.


Leaves all cauline, flat, pinnatifid, with a broad midrib, up to about 5 cm. long.


Heads discoid, few or solitary on each stem; involucre 10-14 mm. high, the bracts narrow and equal; flowers light pink, all perfect; pappus of 10-16 hyaline scales.



Accepted Name:
Chaenactis thompsonii Cronquist
Publication: Vasc. Pl. Pacif. N.W. 5: 123, fig. [p. 125]. 1955.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Chaenactis thompsonii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Chaenactis thompsonii checklist entry.

E-Flora BC: Chaenactis thompsonii atlas page.

CalPhotos: Chaenactis thompsonii photos.

USDA Plants: Chaenactis thompsonii information.

15 photographs:
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