Treelet 4 to 12 (25) m tall; trunk to 15 cm in diam. Branches terete, smooth, minutely lenticellate, glabrous. Leaves paripinnate; petioles terete, 27-37 cm long, gradually swollen toward base; rachis reddish or dark brown 20-58 (115) cm long, obtusely to narrowly rhombic distally, nearly terete and striate at base, glabrous, shiny, smooth; petiolules pulvinate, 4-12(35) mm long, glabrous, oblong-conical, canaliculate; leaflets (6)8-16(30), alternate, opposite or subopposite, chartaceous to subcoriaceous, glabrous, oblong to elliptic, 10-45 × 3.7-13, the adaxial surface with prominulous, plane or slightly sunken midvein and secondary veins, the abaxial surface with prominent midvein and secondary veins, the apex obtuse, acuminate or seldom long-acuminate and mucronate, the base asymmetrical to strongly asymmetrical, obtuse-cuneate, to nearly rounded (then one side shorter than the other), tapering into the petiolule, the margins undulate; venation brochidodromus, with secondary veins alternate or subopposite, arching. Thyrses axillary, panicle-shaped, distal on distal portion of main stem and branches, 28-35 (100) cm long, the secondary branches 18(35) cm long; axes angled, sulcate, sparsely puberulent; bracts nearly triangular-lanceolate, persistent, 1-2 mm long; dichasia simple or compound, nearly sessile to shortly pedunculate; pedicels 0.3-0.7 mm long, articulate near the middle to just below the flower, usually pinkish when immature, green at anthesis. Calyx pinkish in immature flowers, green at anthesis, 1.2-3 mm long, puberulent, the sepals 1.0-2.5 mm long, concave to nearly keeled, ovate-deltate to lanceolate, obtuse or rounded at apex, the margins sometimes ciliate with simple or glandular hairs; petals oblong or oblong-lanceolate, 3-3.7(5) mm long, reflexed at anthesis, papillate on adaxial surface, glabrous on abaxial surface, rounded at apex, cuneate at base; appendages a little shorter than the petals, villose on adaxial surface; disc annular, 5-lobed, glabrous or puberulent, 0.4-0.5 mm tall; stamens 5, the filaments of equal length or slightly unequal, 1-2.2 mm long, glabrous or less often puberulous, the anthers 1.1-1.4 (2) mm long, oblong, oblong-lanceolate to lineate, glabrous, apiculate at apex; ovary glabrous, the stigma elongate, nearly terete, papillate. Fruits 1(2)-seeded, ellipsoid to globose, green, glabrescent, smooth, 1.7-3 × 1.1-3 cm, rounded at apex, shortly apiculate, the pericarp 0.9 mm thick. Seeds ellipsoid, to 1.5 cm long.
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A small tree. It is usually 4-12 m tall. The trunk is 15 cm across. The leaves have leaflets along the stalk. The leaf stalks are 27-37 cm long. There are 8-16 leaflets. They are 10-45 cm long by 4-13 cm wide. The fruit are oval or round with 1 or 2 seeds. The fruit are 2-3 cm across. The seeds are 1.5 cm long.
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