Annual herb, up to 0.7 m high. Stems erect, sometimes with procumbent branches, not distinctly angled. Leaves usually with 7-9 leaflets per leaf, leaflets narrowly obovate to oblong, up to 20 mm long. Flowers: in long-stalked inflorescences; calyx lobes 1.5-2.0 mm long; petals completely glabrous; corolla mauve; Oct.-Mar. Pods reflexed.