Page author: Don Knoke
Vicia tetrasperma
smooth tare, lentil vetch, slender vetch

Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California, also in northern Idaho and western Montana.

Habitat: Roadsides, fields, forest edge, wastelots, and other disturbed areas.

Flowers: May-August

Origin: Introduced from Europe

Growth Duration: Annual

Conservation Status: Not of concern


Slender-stemmed, glabrous annual, the stem 3-7 dm. tall.


Leaves pinnate; leaflets 8-10, linear to narrowly oblong, 10-25 mm. long, with a needle-like tip; stipules 2-4 mm. long, linear, usually with a basal tooth; tendrils well-developed.


Inflorescence of 2- to 3-flowered racemes on filiform, axillary peduncles about equal to the leaves; flowers pea-like, bluish, the banner only slightly reflexed; calyx lobes 5, linear-lanceolate, about as long as the tube; style densely bearded at the tip.


Pod 1-1.5 cm. long, 4-5 seeded, glabrous.

Accepted Name:
Vicia tetrasperma (L.) Schreb.
Publication: Spic. Fl. Lips. 26. 1771.

Synonyms & Misapplications:
Vicia tetrasperma (L.) Schreb. var. tenuissima Druce
Additional Resources:

PNW Herbaria: Specimen records of Vicia tetrasperma in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Vicia tetrasperma checklist entry.

E-Flora BC: Vicia tetrasperma atlas page.

CalPhotos: Vicia tetrasperma photos.

USDA Plants: Vicia tetrasperma information.

28 photographs:
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