Shrubs, 1-3 m high. Branches light brown pubescent, becoming glabrous. Leaves 15-25 cm; stipules setaceous, brown pubescent; leaflets 9-19; petiolules ca. 1 mm; blades papery, ovate-oblong or ovate-lanceolate, rarely obovate, terminal leaflet largest, to 10 cm, lateral leaflets smaller, veinlets obvious, base cuneate or rounded, apex acuminate, mucronate. Racemes slender, sometimes curved, 10-15 cm, opposite leaves. Bracts setaceous, gray-brown hairy. Calyx obliquely campanulate; teeth 5, obtuse. Corolla white or pale yellow; standard oblong or obovate-lanceolate, ca. 16 × 6 mm, apex retuse, narrowing to claw from middle; wings ovate-oblong, 1-auriculate, rugose; keel shorter than wings, 1-auriculate, claw equal to blade. Stamens 10, somewhat fused at base. Ovary stalked, gray-brown hairy; ovules many. Legumes moniliform, 12-16 × 1-1.2 cm, pubescent, densely so where constricted, beak long. Seeds (1 or)2-4(or 5), dark red or red, ca. 12 × 7 mm, acute at both ends. Fl. and fr. Apr-Sep.
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