Herbs perennial, from tuber-bearing rhizome, glabrous. Stems not winged, sprawling, branched along trailing stems several times, 2–6 dm. Leaves 0.5–2 cm; tendrils well devel­oped; stipules filiform-linear, 5–10 × 1–3 mm, much smaller than leaflets; leaflets 2, blades lanceolate, 10–40 × 5–15 mm, surfaces glabrous. Inflo­rescences 4–6-flowered, 6–15 cm. Flowers 8–12 mm; calyx lobes unequal, lateral lobes linear-triangular, equal to tube; corolla reddish, banner erect, blade longer than claw, wings equal to keel; ovary glabrous, style rotated 90° from ovary axis. Legumes 20–30(–40) × 3–6 mm. 2n = 14.

Phenology: Flowering Apr–Jun.
Habitat: Roadsides, meadows, fields.
Elevation: 50–100 m.

Distribution

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Introduced; Man., Ont., Que., Sask., Conn., Ill., Ind., Iowa, Ky., Maine, Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Y., Ohio, Pa., Tenn., Vt., Wash., W.Va., Wis., Europe, w Asia, introduced also in Pacific Islands (New Zealand), Australia.

Discussion

Selected References

None.

Lower Taxa

None.