Erect shrubs or trees. Branchlets terete with longitudinal ridges, glabrous. Leaves 1-or 2-pinnate; stipules deciduous; petiole 7.5-18 cm, central petiolules 1-3.5 cm, lateral petiolules to 1.2 cm, glabrous; axis of leaf 12-20 cm, glabrous; leaflets oval-elliptic or oblong, 5-15 × 2-8.5 cm, base rounded to subcordate, margin irregularly serrate, apex acuminate or mucronate, slightly setose on abaxial surface, sparsely so on adaxial surface; lateral veins 6-8 pairs, veinlets inconspicuously protruding. Inflorescences leaf-opposed, compound dichasial; peduncle 2-9.5 cm, almost glabrous; bracts small, narrowly triangular, caducous. Pedicel 1-4 mm, pubescent; buds ovate, 1-2 mm, apex suborbicular. Calyx tube cupulate, 2-3 mm; sepals ovate-triangular, apex obtuse or cuspidate, glabrous. Petals elliptic, 0.8-1.8 mm. Staminodial tube 0.8-1.8 mm, lower part 0.15-0.2 mm, upper part 0.5-1 mm, lobes 0.15-0.2 mm. Anthers elliptic, 6-8 × 5-6 mm. Ovary ovate, 0.2-0.3 mm; style 0.5-0.7 mm; stigma expanded slightly. Berry oblate, 0.4-0.5 cm, 4-6-seeded. Fl. Jun-Jul, fr. Aug-Sep. 2n = 24.
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