Shrubs, 1-2 m. Branchlets gray-white pubescent. Leaves 15-20(-25) cm; stipules linear, 3-4 mm, caducous; leaflets 17-25, ovate-lanceolate or ovate-oblong, 2-3(-4) × 1-1.5 cm, papery, pubescent abaxially, glabrous adaxially, base rounded or obtuse, apex cuspidate. Racemes opposite a leaf or appearing terminal; bracts linear, 6-8 mm, hairy. Calyx campanulate, ca. 10 mm; teeth 5, short, hairy. Corolla white; standard reflexed, obovate-lanceolate, ca. 16 × 3-5 mm, 2-auriculate at middle, apex retuse; wings oblong or broadly linear, 13-14 mm, unequally 2-auriculate at base, claw slender, ca. 6 mm; keel obovate or falcate. Stamens 10, slightly fused and sparsely pubescent at base. Ovary gray-brown hairy, stalk short; style straight, glabrous. Legumes moniliform, 6-15 cm, constricted between seeds, beaked, gray-white pubescent or subglabrous. Seeds 2-4(-6), yellow-brown or red-brown, long ovoid. Fl. and fr. Mar-Aug.
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