Erect, perennial herb. Leaves alternate, up to 25 cm long, imparipinnate with 11–51 leaflets; stipules large, leaf-like, entire, broadly triangular-ovate; rachis nearly glabrous, sometimes pubescent; leaflets opposite, narrowly elliptical or lanceolate, up to 3 cm × 1.5 cm, apex obtuse. Inflorescence a many-flowered raceme; bracts linear, whitish. Flowers bisexual, papilionaceous, 5-merous; calyx tube 1.5 mm long, upper teeth 0.5 mm long, lower teeth up to 2 mm long; corolla purplish, white or yellow, with standard up to 1.3 cm long. Fruit a lanceolate pod up to 4 cm × 7 mm. |