Erect, sub-erect or trailing, annual herb; stem stout, branches twining, brown, hairy, densely clothed with fine ferruginous, silky hairs; stipules ovate-lanceolate; leaves 3-7 foliolate, long petioled, leaflets stipillate, ovate-elliptical, membranous, acute, more or less hairy above, pubescent below, petiolules very minute; stipules filiform; inflorescence, few flowered, short peduncled, sessile racemes; bract minute, narrow, persistent; calyx densely silky, hairy, teeth long, setaceous; corolla purple-pink, white or reddish, little exserted, petals about equal in length, standard short, not spurred; stamens 10, monadelphous, all fertile; anthers uniform; ovary subsessile, hairy, few ovuled; style short, slender beardless; stigma minute, capitate; pods linear-oblong, straight or slightly falcate, pubescent, turgid, 2-4 seeded, subtorulose; seeds globose or reniform, smooth.