Tree, 5-25(-45) m by 20-50(-120) cm, sometimes buttressed. Branchlets 4-10(-15) mm thick, lenticellate, glabrous; pith with some to many dispersed vascular strands. Leaves 2-8(-10)-jugate, usually glabrous. Petioles terete to strongly flattened at base, (3-)6-15(-26) cm, pith usually with many vascular strands. Leaflets ovate to oblong, 3.5-25 by 1.5-10 cm, rigid, chartaceous, glabrous or pubescent underneath; intervenium with pitted dots on lower surface (most distinct in f. cuspidata and f. pallida); base often very oblique, lower half cuneate, apical half rounded; apex usually abruptly acuminate, acumen up to 2(-4) cm by 1-2 mm, tip slightly broadened, blunt; midrib and nerves prominent beneath, nerves 5-20 pairs (angle 45-70°), strongly curved, geniculate close to the margin, apical ones sometimes arching, sometimes all nerves looped and joined near the margin. Panicles axillary, together usually pseudoterminal, long-peduncled, 5-35 cm long, densely and minutely tomentose, glabrescent, branches rarely exceeding 3 cm. Flowers tomentose, 2-4 mm long. Calyx in ♂ flowers 1-1 mm high, in female ones 1.5-2 mm. Petals outside densely tomentose, inside slightly woolly except at the base. Episepalous stamens usually distinctly longer than the epipetalous ones, sometimes all adnate to the disk. Disk in ♂ flowers more or less cushion-shaped, in female flowers cupular, rim 6-undulate. Pistil in ♂ flowers strongly to nearly entirely reduced. Infructescences stout, (nearly) glabrous, flower-remains long persistent. Fruits ovoid to oblong, slightly oblique, 1.75-3.5(-4) by 0.75-1.75(-2.25) cm, somewhat contracted at the apex, rounded at the base, yellow to purple when ripe. Cotyledons contortuplicate, deeply palmatifid, with c. 1 segments.
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A tree. It grows up to 25-45 m tall. The trunk is 1 m across. It can have buttresses. The leaves are alternate and compound. The leaves have 2-10 pairs of leaflets. The flowers are hairy and in groups 5-23 cm long in the axils of leaves. The fruit stalk is stout. The fruit are oblong and yellow to bluish-black. They are 2-4 cm long by 1-2 cm wide. They have a smooth skin. The flesh is yellowish-purple. They contain one seed.
A subcanopy tree in undisturbed mixed dipterocarp forests at elevations up to 700 metres. Found throughout the forest (rarely in swamps) on most soil types, including limestone. In secondary forests usually present as a pre-disturbance remnant tree.
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A tropical plant. It grows in primary forest and occasionally in swamps up to 600 m altitude above sea level. It can grow on limestone.
Primary, sometimes secondary forests, rarely swamps, up to c. 600 m. Fl. Mainly March-Oct., fr. Mainly March-Sept.
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