Tree up to 18 m by 40 cm. Branchlets c. 3 mm thick, glabrescent; pith with a peripheral cylinder of large and small vascular strands. Stipules from: very caducous, inserted at the conjunction of branchlet and petiole, reniformous, c. 2 mm long, to: subpersistent, inserted on the petiole up to ¾ cm from its base, auricle-shaped, 3-5 mm long. Leaves 0-3(-4)-jugate, glabrous. Leaflets elliptic-ovate to elliptic-lanceolate, tapering at base and apex, 5.5-12(-17) by 2½-5(-7¼) cm, subcoria-ceous; base cuneate; margin entire; apex caudate-acuminate; nerves 7-11 pairs (angle 60-80°), curved, distinctly arching at some distance from the margin, not very conspicuous. Inflorescences terminal, laxly paniculate, thinly tomentose to glabrous, ♀ ones 10-30 cm long, female ones 7-15 cm. Flowers subglabrous, ♂ ones 3-6 mm, female ones 7-10 mm. Calyx subtruncate, in ♂ flowers 1-2 mm high, in ♂ ones 4 mm. Stamens glabrous, in ♂ flowers 3, adnate to the disk, in ♀ flowers 6, slightly confluent at the base, inserted on the disk. Disk in ♂ flowers consisting of 3 tomentose alternistaminal lobes, which are adnate to the rudimentary pistil, the latter being glabrous, flat, tapering into a fili-formous, rudimentary style; in female flowers glabrous, adnate to the receptacle and to the stamens. Pistil glabrous. Infructescences up to 15 cm long with few fruits; calyx funnel-shaped, faintly 3-lobed, 7-9 mm diam. Fruits spindle-shaped, triangular in cross-section, 4¾-7½ by 1¼-2¼ cm, glabrous; pyrene acutely triangular; lids c. 0.25 cm thick. Seeds 1-2; sterile cells rather strongly reduced.
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A tree. It grows 36 m tall. The trunk can be 40 cm across. The bark is grey and scaly. The leaflets narrow to a tail. The flowers are yellow-brown. The fruit is spindle shaped and 8 cm long.
Primary forests, sometimes bamboo-forests, up to c. 250 m, fl. Mainly April-July, fr. Mainly Oct.
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It is a tropical plant. It grows in forests from sea level to 230 m above sea level.
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