An erect shrub, 1.2-2.5 m tall, twigs zigzag, bark greyish brown, young shoots slightly puberulous. Spines stipular, straight, white, connate at the base, 1.5-5 cm long. Rachis 0.8-5 cm long, glabrous, usually with a gland between the upper pair of pinnae. Pinnae 1-4 pairs, 5-15 cm long. Leaflets 5-10 pairs, sessile, c. 2.5-4 mm long, c. 1-1.5 mm broad, oblong, obtuse, glabrous. Inflorescence pedunculate heads in axillary fascicles of 2-8, rarely shortly racemose or umbellate, flowers yellow, fragnant, peduncle c. 1.2-2.5 cm long, bracts 2-3, about the middle of the peduncle. Calyx c. 1 mm long, campanulate. Corolla 2.5 mm long. Pod 5-7.5 cm long, c. 0.8-1.7 cm broad, glabrous, reticulately veined, 5-6 seeded, stipe c. 3-5 mm long.