Stem 1 1/2–2 ft. high, erect, simple, terete, shortly hairy. Leaves short-stalked, simple, linear-lanceolate, 4–5 in. long, hairy on both sides. Flowers in lax racemes. Calyx about a line long, silky, teeth lanceolate, nearly equal. Standard ovate-oblong, subacute, yellow, striated; wings one-half smaller, oblong, obtuse; keel rather longer, yellow. Pod 1/2 in. long, sessile, about 26-seeded.