Page author: David Giblin
Trifolium dubium
least hop clover, suckling clover
WTU specimens
Other herbaria

Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.

Habitat: Disturbed areas including forest openings, meadows, wastelots, roadsides, and lawns.

Flowers: April-September

Origin: Introduced

Conservation Status: Not of concern

Description:
General:

Sparsely pubescent annual, the stems 1-several, 1-5 dm. long, prostrate or ascending to erect.

Leaves:

Leaves trifoliate, short-petiolate; leaflets obovate to obcordate, 5-20 mm. long, denticulate above mid-length; stipules 3-5 mm. long, acuminate, entire.

Flowers:

Inflorescence of 3- to 20-flowered heads, 6-7 mm. broad, on short, axillary peduncles; flowers pea-like, yellow, reflexed, 3-3.5 mm. long; calyx glabrous, 5-nerved, half as long as the corolla, the 5 teeth narrowly lanceolate, entire, the upper 2 broader than and half as long as the lower 3; banner hood-like, folded, nearly hiding the shorter wings and keel.

Fruits:

Pod 1-seeded, longer than the attached style.

Accepted Name:
Trifolium dubium Sibth.
Publication: Fl. Oxon. 231. 1794.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Trifolium dubium checklist entry.

E-Flora BC: Trifolium dubium atlas page.

CalPhotos: Trifolium dubium photos.

USDA Plants: Trifolium dubium information.

6 photographs:
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