Shrubs, 1-2 m tall, rarely small trees. Branchlets terete, brown pubescent. Pinnae 2 or 3 pairs, 10-18 cm; glands on petiole and rachis of apical 1 or 2 leaflets at places of insertion, glands circular, sessile; leaflets 4-7 pairs, opposite, oblong-rhombic, 2-9 × 1.5-4 cm, apical ones larger, downward smaller, membranous, abaxially pubescent, adaxially glabrous, base obtuse or acute, apex obtuse, mucronate. Heads ca. 15-flowered, ca. 1 cm in diam. (not including filaments), arranged in terminal panicles ca. 30 cm. Flowers sessile, white, fragrant. Calyx campanulate, 1.5-3 mm, teeth and corolla pubescent. Corolla 6-8 mm; lobes ovate-oblong, ca. 1.5 mm. Staminal tube shorter than corolla tube. Ovary stipitate, glabrous. Legume red-brown, falcate, 6-10 × 1-1.3 cm. Seeds black, shiny, suborbicular, ca. 1 cm. Fl. Mar-Aug, fr. Apr-Dec.
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