Page author: David Giblin
Trifolium campestre
hop clover
WTU specimens
Other herbaria

Distribution: Distributed chiefly west of the Cascades in Washington; distributed widely throughout North America.

Habitat: Wastelands, roadsides, meadows, and other disturbed areas.

Flowers: May-August

Origin: Introduced

Conservation Status: Not of concern

Description:
General:

Pubescent to glabrous annual, with usually several procumbent to ascending stems 1-3 dm. tall.

Leaves:

Leaves trifoliate, the petioles considerable longer than the stipules; leaflets oblong-elliptic to oblanceolate, 1-3 cm. long, serrulate 2/3 their length; petiole of the terminal leaflet at least twice as long as those of the lateral leaflets; stipules ovate, 4-9 mm. long, attached to the petiole over half their length, the free tip about the same length as the width of the attached portion.

Flowers:

Inflorescence of 30- to 100-flowered heads, up to 12 mm. thick, on axillary peduncles longer than the leaves; flowers 4-6 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- or 2-seeded, much longer than the attached style.

Accepted Name:
Trifolium campestre Schreb.
Publication: Deutschl. Fl. 1: 16. 1804.

Synonyms & Misapplications:
Trifolium procumbens L., rejected name [HC]
Additional Resources:

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

WA Flora Checklist: Trifolium campestre checklist entry.

E-Flora BC: Trifolium campestre atlas page.

CalPhotos: Trifolium campestre photos.

USDA Plants: Trifolium campestre information.

13 photographs:
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