Herbs annual. Stems sprawling or climbing, slender to robust, 3–6 dm. Leaves 1–4 cm; ten­drils branched; stipules foliose, approaching leaflets in size, semisagittate, with nectarifer­ous patch abaxially; leaflets 6–14, blades oblong to linear, 10–25 × 1–5 mm, apex obtuse to truncate-emarginate, surfaces finely pubescent. Inflo­rescences 1–3-flowered, 0–1 cm. Flowers 25–35 mm; calyx base symmetric, lobes equal, 1/2–2/3 length of tube; corolla yellow suffused with violet, banner stenonychioid, blade equal to claw, glabrous; style com­pressed abaxially, pubescent apically, tufted abaxially. Legumes black, linear, 25–45 × 7–10 mm, oblique-tipped, gla­brate; stipe absent. Seeds ca. 15, brown with indistinct black spots, compressed-globose, 3–3.5 mm diam.; hilum raised, white, encircling 3/4 circumference of seed. 2n = 12, 14.

Phenology: Flowering Apr–May.
Habitat: Roadsides, open woods, cul­tivated fields.
Elevation: 0–1000 m.

Distribution

• Generated Map
• Legacy Map

Introduced; Ala., Ark., Del., Fla., Ga., Ky., La., Md., Mass., Mich., Miss., N.J., N.Y., N.C., S.C., Tenn., Tex., Va., W.Va., c, se Europe.

Discussion

Selected References

None.

Lower Taxa

None.