Annual, somewhat spreading. Petiole 1.2-4 cm long, leaflets 10-20 mm long, 7-15 mm broad, obovate to cuneate, obtuse, truncate to retuse, slightly toothed; stipules laciniate. Inflorescence a 2-8-flowered peduncled raceme, peduncle 5-15 mm long. Pedicel c. 5 mm long. Calyx 2.5 mm long, teeth subequal to the tube. Corolla c. 4 mm long, yellow. Fruit 2-12 mm high, with 2-4 (-6) spirals, glabrous, spines hooked in 2 rows, oriented almost parallel to the surface of the disc.