Stem herbaceous, erect, striate, slightly branched, nearly glabrous. Stipules minute, setaceous or obsolete. Petioles 1/2– 3/4 in., glabrous, erecto-patent. Leaves with three subsessile linear leaflets, central 2–3 in. long, 1/4 in. broad, narrowed to both ends, mucronate, upper surface quite and the lower nearly glabrous. Flowers in elongate few-flowered nearly sessile terminal racemes. Bracts linear, minute. Pedicels 2 lines long, at first erect. Calyx broadly campanulate, 2 lines deep, glabrous, the teeth not more than one-third as long as the tube. Corolla 5/8– 3/4 in. long, striate, the standard roundish, more than 1/2 in. broad, the keel much less curved than usual. Pod sessile, cylindrical, 1 1/2 in. long, 1/4 in. thick, glabrous, many-seeded.
