Plant: Annual, perennial herb, vine, unarmed; hairs generally including minute, hooked ones Leaves: odd-1-pinnate; main axis extended beyond basal leaflets, with stipule-like appendages, at least at tip; stipules persistent; leaflets 3, ovate-triangular in outline, generally lobed INFLORESCENCE: raceme; bracts persistent; peduncle 2-10 cm Flowers: calyx lobes << tube; corolla pink-purple; incurved, sickle-shaped in bud, keel coiled 2-3 turns; 9 filaments fused, 1 free Fruit: legume, dihiscent, 2.5-3.5 cm, 5-7 mm wide, oblong, generally curved, ± glabrous; Seeds 1-several, often ± reniform, generally hard, smooth Misc: Washes; ± 125 m.