Tree 5-15(-20) m. Twigs 1.5-3 mm diameter, (pale) reddish or yellowish brown, glabrescent, hairs 0.1 mm; older twigs ± fissured or cracking; lenticels inconspicuous. Leaves membranous or thinly chartaceous, elliptic(-oblong), 7-27 by 2.5-12 cm, base rounded or shallowly cordate, sometimes subacute, apex narrowed with blunt tip; upper surface olivaceous, lower surface grey-olivaceous, seemingly glabrous, but hairs sparse, 0.1 mm or less; distinctly papillose; dots absent; midrib slightly raised above; lateral nerves 8-13(-20) per side, at 50-70(-80)° to the midrib, flat or slightly sunken above, lines of interarching and venation (usually) indistinct; petiole 6-20 by 1.5-3 mm, glabrescent; leaf bud 5—12(—15) by 1.5-3 mm, hairs 0.1-0.3 mm. Inflorescences between the leaves and below, glabrescent, paniculate, with flattened peduncle; in male: (l-)2-7 cm long, peduncle 10-40 by 1.5-3.5 mm, lower lateral branches to 20(-25) mm, central axis absent or to 30 mm long, with 1-4 lateral branches, each branch with a scar-covered brachyblast to 15 mm, with a subumbel of 3-10 flowers, buds of various sizes; female as male but shorter, subumbels of 2-6 flowers; bracts 1-1.5 mm, pubescent, caducous, the scars sometimes higher up on the branches; flowers with thick perianth, hairs 0.1 mm, partly glabrescent. Male flowers: pedicel 3.5-5 by 0.5-0.7 mm; bracteole ovate, 1-1.5 mm, persistent, (sub)apical; buds ovoid-oblong, 5.5-6.5 by 2.5-3.5 mm, sometimes faintly angular, apex subacute or ± blunt, cleft 1/5-1/3, lobes 1.5-2 mm long. Androecium 5-6 mm; androphore about as wide as the synandrium, 2-2.5 mm long, glabrous or hairs sparse, 0.1 mm or less; synandrium 2.5-4 by 0.7-1 mm, apex blunt, thecae 10-15, often with short sterile apical appendages 0.1 mm, sterile apex 0.2 mm or absent. Female flowers: pedicel slender, 2-5 mm; buds ovoid-oblong, 4.5-5.5 by 2.5-3 mm, apex ± acute, cleft c. 1/3; ovary ovoid-ellipsoid, 3.5 by 2 mm, hairs less than 0.1 mm. Fruits solitary or 2-6 per infructescence, ellipsoid or oblong, 2-3.5(-4) by 1-1.7 cm, apex (sub)acute, base (sub)acute or narrowed into an up to 5 mm long pseudo-stalk, hairs mealy, pale brown, 0.1-0.2 mm, glabrescent except very base and apex; pericarp 0.5-1 mm thick, brown, wrinkled or ± longitudinally striate; seeds ellipsoid, 2-2.5 (-3) cm, (blackish or) dark brown; aril deeply slenderly laciniate; fruiting pedicel 3-7 mm.
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A medium sized tree. It grows to 15 m tall. Sometimes it has stilt roots. The twigs are slender and smooth. The leaf is oval and 8-32 cm long by 5-12 cm wide. The base of the leaf if often rounded or heart shaped. The midrib and veins are sunken in the top surface of the leaf and raised underneath the leaf. The leaf stalk is 1-2 cm long. The male and female flowers are separate on the same tree. The male flower cluster is 5-7 cm long. The female flower cluster has fewer and shorter branches than the male. The fruit are oval and 3.5 cm long by 1.5 cm wide. They are yellow. The base of the fruit is narrowed into a false stalk 3-4 mm long. The fruit stalk is slender and 2-2.5 cm long. The seed is 3 cm long by 1 cm wide. It is covered with a red aril. It is divided irregularly.
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