Blooms: June-September
Habit: herb
Duration: annual,biennial
Origin: Introduced from Europe.
Distribution: Scattered locations on both sides of the Cascades in Washington; Alaska to California, east to Montana and Wyoming; also occurring most of eastern North America.
Habitat: Roadsides, railways and waste places.
Habit: herb
Duration: annual,biennial
Origin: Introduced from Europe.
Distribution: Scattered locations on both sides of the Cascades in Washington; Alaska to California, east to Montana and Wyoming; also occurring most of eastern North America.
Habitat: Roadsides, railways and waste places.
Species Description:
General: Pubescent to glabrous annual, with usually several erect or ascending stems 2-5 dm. tall.
Leaves: Leaves trifoliate, leaflets oblong-elliptic to oblanceolate, 1-3 cm. long, sub-sessile, serrulate 2/3 their length; stipules narrow, 10-18 mm. long, attached to the petiole over half their length, the free portion acuminate.
Flowers: Inflorescence of 30- to 100-flowered heads, 10-16 mm. thick, on axillary peduncles longer than the leaves; flowers 5-7 mm. long, yellow, pea-like; calyx glabrous, half the length of the corolla, the upper 2 teeth about half as long as the lower 3, the latter slightly longer than the calyx tube; banner flared and spreading, much longer than the wings and keel.
Fruits: Pod 1-seeded, equal to the attached style.
General: Pubescent to glabrous annual, with usually several erect or ascending stems 2-5 dm. tall.
Leaves: Leaves trifoliate, leaflets oblong-elliptic to oblanceolate, 1-3 cm. long, sub-sessile, serrulate 2/3 their length; stipules narrow, 10-18 mm. long, attached to the petiole over half their length, the free portion acuminate.
Flowers: Inflorescence of 30- to 100-flowered heads, 10-16 mm. thick, on axillary peduncles longer than the leaves; flowers 5-7 mm. long, yellow, pea-like; calyx glabrous, half the length of the corolla, the upper 2 teeth about half as long as the lower 3, the latter slightly longer than the calyx tube; banner flared and spreading, much longer than the wings and keel.
Fruits: Pod 1-seeded, equal to the attached style.
Accepted Name:
Trifolium aureum PollichSynonyms:
Trifolium agrarium L. p.p.
Treated in Flora of the PNW as:
Trifolium agrarium
Additional Resources:
PNW Herbaria Specimens: View list of Trifolium aureum specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Trifolium aureum specimens in the WTU Herbarium database.
Washington Flora Checklist: Trifolium aureum treatment.
E-Flora BC: Trifolium aureum atlas page.
CalPhotos: Trifolium aureum images.
USDA Plants Database: Trifolium aureum.
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Robert L. Carr, 2009
Robert L. Carr, 2009
Robert L. Carr, 2009
Robert L. Carr, 2009
Ron Bockelman, 2011
Ron Bockelman, 2010
Ron Bockelman, 2011
Ron Bockelman, 2011
Ron Bockelman, 2010
Ron Bockelman, 2010
Ron Bockelman, 2010
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 WA Native Plant Society |
