Trees, to 10 m tall; young branches densely pubescent, then dark gray or dark purple, glabrous; buds ovoid, glabrous or glabrescent. Leaves 10-16 cm; leaflets 11-15; petiolule 2-6 mm; blades lanceolate-elliptic or long ovate-elliptic, 2-4.2 × 1-2 cm, glabrous, base cuneate or rounded, apex acute. Racemes 8-10 cm, erect, yellow-brown hairy. Flowers 7-8 mm; pedicel 2-4 mm. Calyx campanulate; teeth short, densely yellow-brown hairy. Corolla white; standard obovate, apex emarginate. Ovary narrowly elliptic, shortly stalked, densely brown hairy. Legumes flat, elliptic, 3.3-6 × 1-1.5 cm, wing 1-4 mm, shortly hairy. Seeds 1 or 2, elliptic, 5-7 mm, brown-purple. Fl. Jul-Aug.
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