Blooms: April-September
Habit: herb
Duration: annual
Origin: Introduced
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.
Habit: herb
Duration: annual
Origin: Introduced
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.
Species 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.
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 SibthorpSynonyms:
(none)
Treated in Flora of the PNW as:
Trifolium dubium
Additional Resources:
PNW Herbaria Specimens: View list of Trifolium dubium specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Trifolium dubium specimens in the WTU Herbarium database.
Washington Flora Checklist: Trifolium dubium treatment.
E-Flora BC: Trifolium dubium atlas page.
CalPhotos: Trifolium dubium images.
USDA Plants Database: Trifolium dubium.
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Paul Slichter, 2006
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 WA Native Plant Society |
