Erect perennial, up to 150 cm tall, branches glabrous to sparsely pubescent. Leaflets 9-21, 1.5-5.0 cm long, 4-15 mm broad, elliptic to lanceolate; stipules sagittate. Inflorescence a 25-50-flowered raceme, 7-10 cm long. Calyx teeth c. 3 mm long. Corolla white to purple. Vexillum c. 10-15 mm long. Fruit 20-50 cm long, c. 2-3 mm broad, 2-10-seeded.