Tree 8-20(-30) m. Twigs sometimes slightly angular, 2-5 mm diameter, early glabrescent; hairs 0.1-0.3 mm; bark striate, not flaking, lenticels conspicuous or inconspicuous. Leaves thinly chartaceous, (elliptic-)oblong, (6-)8-25 by 2.5-8.5 cm, base attenuate, apex acute-acuminate; upper surface drying olivaceous to brown, usually minutely pale-pustulate, lower surface early glabrescent; dots absent; midrib slender, flat above; nerves 6-15 pairs, thin, flat, indistinct above, lines of interarching indistinct; venation ± fine, indistinct on both surfaces; petiole 10-26 by 1-2 mm; leaf bud 6-12 by 1-2 mm, with hairs 0.1-0.3 mm. Inflorescences with sparse stellate hairs 0.1 mm or less; in male: (1—)2—3 times branched (sometimes hardly branched, spike-like, see note 1), 5-11 by 2-5 cm; in female: up to 5 cm long; peduncle 0.5-2 cm; bracts ± oblong, 1.5-4 mm long, thinly pubescent, caducous; flowers solitary or to 4 together, glabrous; perianth 2-lobed, pedicel not articulated. Male flowers: buds (including pedicel) pear-shaped, little to much compressed, about as broad as or slightly broader than long, 1.5—2.5(—3) by 2.2-3.8 mm, apex broadly rounded, the lower 1/3 tapering into the pedicel 2-3(-3.5) mm, cleft 2/3-4/5, lobes 0.2-0.3 mm thick; androecium compressed, broadly transversely ellipsoid or kidney-shaped, broadly rounded above, 1.1-1.5 by 1.4-2.8 mm (Plate 1: 5); thecae (14-)20-36, contiguous, 1.5-2 mm long, free apices 0.1-0.5 mm, only at one side of the androecium strongly incurved; column hollow for at least 2/3; androphore to 0.1 mm long. Female flowers: pedicel 2-2.5 mm long; buds broadly ovoid-ellipsoid, 1.8-2.2 by 2-2.2 mm, cleft 1/2-4/5; ovary ovoid, glabrous, 1-1.5 by 1 mm, stigma minutely 2-lobed, 0.1 mm high. Fruits solitary or 2-6 per infructescence, ellipsoid, apex rounded to subacute, 1.3-2.8 by 1.1-1.7 cm, glabrous, without or with sparse tubercles; pericarp 1-2 mm thick; fruiting pedicel 2-5 mm long; perianth not persistent.
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A tree. It grows 8-20 m tall.
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