Stems slender, firm, wide-twining, slightly grey-pubescent. Stipules 1/4 in. long, ovate-acuminate, scarious, reflexed. Petioles 1/2–1 1/2 in. long, firm; leaflets 3, the central one broad ovate-acuminate, 1 1/2–2 1/2 in. long by 1–2 in. broad, the base rounded; petiolule 1/2 in. long; lateral ones unequal-sided, texture firm, upper surface glabrous, the lower finely grey-pubescent especially on the raised veins. Flowers in lax 6–20-flowered racemes 3–4 in. long on short peduncles. Bracts like the stipules. Bracteoles linear, deciduous. Pedicels 1/4– 1/2 in. long, cernuous, pubescent. Calyx 1/2 in. deep, pubescent, the teeth linear-setaceous, reaching three-quarters down, the lowest longer than the others. Corolla 5/8 in. deep; standard glabrous, yellow, distinctly veined with purple. Pod 1 1/4 in. long, 3/8 in. broad, narrowed at the base and point, finely grey-pubescent when young.
