Trees evergreen, 5-9 m. Old branches dark purplish brown or yellowish brown, glabrous, leaf scars convex, lenticels convex. Young branchlets conspicuously or sparsely yellow-brown pilose. Leaves imparipinnate, 8-15.5 cm; petiole 1.7-2.5 cm; rachis 3.8-5 cm, prolonged 2-10 mm (rarely not prolonged) below terminal leaflet; petiole and rachis glabrous; leaflets (5-)7-9, opposite; petiolule 3-5 mm, thin, grooved; blades pale greenish abaxially, narrowly oblanceolate or elliptic, 2.5-6 × 0.7-2 cm, leathery, sparsely yellowish pubescent or glabrous abaxially, glabrous adaxially, base cuneate, margin slightly repand, apex acute to obtuse-acuminate, slightly retuse; lateral veins 4-6 pairs, fine, inconspicuous adaxially, veinlets slightly raised abaxially. Panicles terminal, ca. 5 cm before flowering, bud obovate, inflorescence and bud appressed short rusty sericeous. Petals white. Ovary densely appressed grayish brown pilose; ovules 4. Legumes obovate or oblong, 3-4.5 × 2-2.5 cm, woody, apex acute, stipe ca. 5 mm; valves thickly woody, slightly turgid, slightly appressed short brown pubescent when young, becoming glabrescent, internally septate; calyx persistent, densely appressed short grayish brown pubescent. Seeds 1 or 2, ellipsoid, slightly compressed, ca. 1 × 0.7 cm; testa red-brown, hard, glossy; hilum elliptic, excavated, ca. 2 mm.
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