A copiously branched, suberect, perennial herb with slender, firm, terete, glabrescent branches; leaves short petioled, imparipinnate; leaflets 13-21, oblanceolate, obtuse or mucronate, glabrous above, silky beneath; stipules linear, subulate, reflexed; flowers in leaf opposed, 10-15 cm long racemes; flowers less than 1cm; pedicels short; bract, bracteoles minute; calyx densely silky, teeth linear, subulate, as long as the tube; corolla pink-red, thinly silky, pubescent outside, standard suborbicular, wings slightly adnate to incurved keel; stamens 10, diadelphous (9+1); anthers uniform, obtuse; ovary sessile, many ovuled; style much incurved, filiform, glabrous or bearded; stigma capiitate, often pedicillate; pod about 5 cm long, linear, flattened, 2-valved, continuous or obscurely septate between the seeds, finely pubescent, slightly curved or nearly straight, 6-10 seeded, soon dehiscing.