Undershrub, 60-120 cm tall, branches pubescent. Leaf unifoliolate, petiole 1-2.5 cm long, leaflet, 4-12.5 cm long, 3.5-7.5 cm broad, orbicular, ovate, rarely elliptic-oblong or lanceolate, acute or sub-acuminate, glabrous above, pubescent below; stipules 6-8.5 mm long, scarious; petiolule c. 1.5 mm long, stipel c. 3 mm long. Inflorescence terminal or axillary raceme, 15-30 cm long. Bract 1.5-3.5 mm long. Pedicel 4-6.5 mm long, pubescent. Calyx c. 2.5 mm long, pubescent, teeth longer than the tube. Corolla 3.8-4.5 mm long, violet or white. Fruit 1.2-2.5 cm long, c. 2.5 mm broad, subfalcate, upper suture slightly indented, lower deeply indented between the seeds, articles 6-8, longer than broad, indehiscent, pubescent, hairs hooked, minute.