Annual, often climbing, stem glabrous, glaucous. Leaf paripinnately compound, rachis ending in a branched tendril, leaflets 2-8, entire or dentate; stipules 1.5-8 cm long, obliquely ovate, toothed at least below, semi-amplexicaul at the base, peduncle ½ to twice as long as the stipule, 1-3-flowered. Calyx 8-15 mm long, teeth longer than the tube, subequal. Corolla white or vexillum lilac and reddish purple. Vexillum 16-30 mm long. Fruit 40-70 mm long, 12-17 mm broad.