Herbs annual or winter annual. Stems erect or sprawling, slender, 0.5–3 dm. Leaves 1–2 cm; tendrils simple; stipules foliose, approaching leaflets in size, hastate, with nectariferous patch abaxially; leaflets 4–8, blades ovate-obovate to elliptic-linear, 8–16 × 1–3 mm, apex acute to truncate-emarginate, apiculate, surfaces gla­brous or sparsely pubescent, hairs long. Inflorescences undeveloped, 1(or 2)-flowered, 0–1 cm. Flowers 5–8 mm; calyx base symmetric, lobes equal, subequal to tube; corolla violet, fading white, banner stenonychioid, blade longer than claw, glabrous; style compressed abaxially, pubescent apically, tufted abaxially. Legumes dark brown to black, linear, 15–25 × 3–4 mm, oblique-tipped, glabrous; stipe absent. Seeds 6 or 7, reddish maroon, grayish brown, or blackish, quadrate, 1.5–2 mm diam.; hilum minute. 2n = 10, 12.

Phenology: Flowering Apr–Jun.
Habitat: Sandy grasslands, field edges, lawns, waste areas.
Elevation: 0–500 m.

Distribution

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Introduced; B.C., Ala., Calif., Ga., Mass., Miss., N.H., N.C., S.C., Va., Wash., Europe.

Discussion

Selected References

None.

Lower Taxa

None.