Trees deciduous, to 15 m tall. Branchlets slightly pubescent or subglabrous. Leaf petiole with an oblong gland ca. 1 cm above base; pinnae 3-5 pairs, 15-20 cm; petiolules ca. 2 mm; leaflets 6-12 pairs, ovate to sub-rhombic, 3-4.5 × 1.2-2.2 cm, subleathery, sparsely appressed pubescent, main vein closer to lower side, base oblique, apex obtuse or emarginate. Heads ca. 20-flowered, arranged in axillary or terminal panicles.

Flow­ers uniform, sessile. Calyx 2-3 mm, glabrous. Corolla yellow-white, ca. 6 mm; lobes lanceolate, ca. 2.5 mm, apex pubescent. Staminal tube longer than corolla tube. Ovary glabrous, sub ses­sile. Legume ligulate, flat, 10-15 × 1.5-2.5 cm, glabrous. Seeds 8-12, obovoid-elliptic; pleurogram obovate-elliptic. Fl. May-Sep, fr. Sep-Feb of the following year.