Page authors: Ben Legler, David Giblin
Trifolium willdenovii
sand clover, tomcat clover

Distribution: Occurring west of the Cascades crest and east along the Columbia River in Washington; British Columbia to California.

Habitat: Grassy hillsides, balds, prairies, and meadows at low to moderate elevations.

Flowers: April-July

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern


Glabrous annual, the stems 1-7 dm. long, spreading to erect.


Leaves trifoliate, petioled; leaflets linear to narrowly oblong, 1-4 cm. long, usually serrulate full length; stipules ovate, lacerate, nearly half as long as the leaflets.


Inflorescence of 6- to 60-flowered, involucrate heads 10-30 mm. broad and long on axillary peduncles; involucre flared and saucer-shaped, irregularly lacerate into many unequal teeth; calyx often purplish, the tube 15-25 nerved, the 5 teeth lanceolate, equal to the tube; corolla pea-like, purplish, often lighter or darker at the tip, slightly longer than the calyx.


Pod usually 2-seeded.

Accepted Name:
Trifolium willdenovii Spreng.
Publication: Syst. Veg. 3: 208. 1826.

Synonyms & Misapplications:
Trifolium tridentatum Lindl. [HC]
Trifolium tridentatum Lindl. var. aciculare (Nutt.) McDermott
Additional Resources:

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

WA Flora Checklist: Trifolium willdenovii checklist entry.

OregonFlora: Trifolium willdenovii information.

E-Flora BC: Trifolium willdenovii atlas page.

CalPhotos: Trifolium willdenovii photos.

USDA Plants: Trifolium willdenovii information.

48 photographs:
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