Erect annual or biennial up to 2.5 m high; stems almost glabrous or sparsely to moderately hairy in upper parts. Lvs almost glabrous but sparsely hairy when young; petioles c. 5-25 mm long; leaflets oblong- elliptic to obovate, obtuse to acute, mucronate, obtuse to cuneate at base, serrate, c. 10-30 mm long; stipules linear-lanceolate, entire. Racemes lax and slender, up to 25 cm long at fruiting; fls numerous. Peduncles > petioles. Calyx ± glabrous to sparsely hairy; calyx teeth = or < tube, narrowly triangular. Corolla white, 4-5 mm long; wings ± = keel. Pod glabrous, reticulately veined, 3-5 mm long, 1-2-seeded; seeds light brown, 2-3 mm long.