Stem erect, herbaceous, 12–18 in. high, copiously branched, the branches slender, angular, thinly pilose. Stipules linear, deciduous. Petioles 1/4– 1/2 in. long, erecto-patent. Leaflets 7–13, oblanceolate, 1/2– 3/4 in. long, 2 lines broad, conspicuously mucronate, lateral ones distant and short-stalked, both sides grey-green and thinly pilose, not at all silvery. Flowers 6–12 in lax racemes on erecto-patent pilose peduncles 3/4–1 in. long from the axils of the leaves. Pedicels 1–1 1/2 lines long. Calyx campanulate, not silvery, 1 line deep, the teeth setaceous, reaching down nearly to the base. Corolla more than twice as long as the calyx. Pod 1/2– 5/8 in. long, 1 line broad, chestnut-brown, glabrous, subtetragonous, 5–6-seeded.
