Page authors: Don Knoke, David Giblin
Trifolium eriocephalum
woolly-head clover

Distribution: Occurring on both sides of the Cascades crest in southern Washington; southern Washington to California, east to Montana, Utah, and Nevada.

Habitat: Meadows and forest openings at middle elevations in the mountains.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Villous-pubescent perennial from a thick taproot with a branched crown, the 1-several stems 2-6 dm. tall.


Leaves trifoliate, leaflets elliptic or ovate to lanceolate or almost linear, 2-7 cm. long, entire or serrulate; stipules ovate to lanceolate, 2-5 cm. long, entire.


Inflorescence of sub-globose heads 2.5-3 cm. broad, on long, mostly terminal peduncles that considerably exceed the subtending leaves; flowers pea-like, 25-80, pinkish to red, 12-17 mm. long, strongly reflexed, but the pedicels only 1 mm. long, the curvature mostly in the calyx and corolla; calyx plumose-villous, half the length of the corolla, the 5 teeth filiform, 2-4 times as long as the 10-nerved tube.


Pod 1- to 4-seeded.

Accepted Name:
Trifolium eriocephalum Nutt.
Publication: Fl. N. Amer. (Torr. & A. Gray) 1(2): 313. 1838.

Synonyms & Misapplications:
(none provided)
var. arcuatum – woolly-head clover    Occurring in Yakima County and the Blue Mountains in Washington; southern Washington to Oregon, east to western Montana.
var. eriocephalum – woolly-head cloover    Occurring on both sides of the Cascades crest in south-central Washington; south-central Washington to California.
Additional Resources:

PNW Herbaria: Specimen records of Trifolium eriocephalum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Trifolium eriocephalum checklist entry.

E-Flora BC: Trifolium eriocephalum atlas page.

CalPhotos: Trifolium eriocephalum photos.

USDA Plants: Trifolium eriocephalum information.

39 photographs:
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