Annual with numerous nearly glabrous branches. Leaf imparipinnately compound, c. 2.5-3.8 cm long, petiole c. 6-13 mm. Leaflets 3-5, opposite, c. 1.2-2.0 cm long, c. 4.5-8 mm broad, oblanceolate, apiculate, pubescent on both sides; stipules c. 4.5 mm long. Inflorescence a short peduncled raceme, up to 9 cm long. Calyx 2-3 mm long, pubescent, teeth longer than the tube. Corolla slightly shorter, equal or slightly longer than the calyx. Fruit c. 1.2-2.0 cm long, c. 3.5 mm broad, flat, appressly pubescent, with a raised longitudinal ridge along the centre of each flattened face and a transverse ridge between the seeds; 5-9-seeded.