Trees, 7-30 m, ca. 50 cm d.b.h. Branchlets glabrous; terminal bud large, densely appressed brownish pubescent. Leaves imparipinnate, 17-35.5 cm; petiole 4.2-9.5 cm; rachis 7-10.5 cm, prolonged 1.4-2.3 below terminal leaflet; petiole and rachis glabrous; leaflets 7-9(-11); petiolule glabrous; blades oblong or ovate-lanceolate, upper leaflets larger, 5-15 × 1.9-6 cm, thinly leathery, both surfaces glabrous, base obtuse, apex acuminate to caudate; veinlets conspicuous when dried. Racemes axillary, equal to leaves or slightly shorter. Flowers ca. 1 cm, 2 flowers nearly opposite at apex of inflorescence, alternate below. Calyx abaxially densely appressed pubescent, adaxially glabrous; teeth broadly triangular, obtuse. Corolla yellow, ca. 3 × as long as calyx; standard striate. Ovary stipitate, glabrous; ovules 2-4. Legumes rhombic-oval or ellipsoid, 2.3-4.8 × 1.7-2.3 cm, apex obliquely beaked, gibbous, constricted between seeds; valves thickly leathery, yellowish brown when dry, glabrous, internally septate. Seeds 1 or 2, red, elliptic, 1.1-1.8 × 0.7-1.2 × 0.6-0.8 cm, striate; hilum small, 2-3 mm, grooved along one side of long axis, 9-13 mm. Fl. in summer.
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