Tree 5-30 m. Twigs subterete or angular, l-2(-2.5) mm diameter, early glabrescent, hairs 0.1 mm or less; older twigs not or but finely cracking or flaking; small lenticels usually present. Leaves membranous or thinly coriaceous, elliptic-oblong to oblong-lanceolate, 7—16(—21) by 2-7(-8) cm, base attenuate, apex acute-acuminate (the very tip sometimes rather blunt); upper surface olivaceous or brown, lower surface greyish, early glabrescent, hairs sparse, less than 0.1 mm; not or indistinctly papillose; dots absent; midrib slightly raised or sunken above, lateral nerves 8—14(—17) per side, at 45-80° to the midrib, flat or sunken (and sometimes very faint) above, lines of interarching not distinct, venation reddish brown, mostly conspicuously contrasting with the lower leaf surface; petiole (5-)8-12(-15) by 0.8-2(-2.5) mm; leaf bud 5-10(-13) by (0.5-)l-2 mm, hairs 0.1 mm or less. Inflorescences between the leaves and below, of the Knema-type, sessile; in male: a simple or 2-or 3-armed scar-covered brachyblast, to 4 mm long, with a subumbel of up to 15(-30) flowers, buds of various sizes, short pubescent; in female: to 1 mm long, with 1-5 flowers (rarely more); flowers with appressed (dark) brown hairs 0.1-0.2 mm, sometimes glabrescent, bracteole l(-2) mm, caducous, (sub)-apical. Male flowers: pedicel 4-6(-7) by 0.4-0.6 mm; buds membranous, ovoid-oblong or ellipsoid-oblong, (4-)5-6.5 by 2-3(-4) mm, apex rather blunt or subacute, cleft 1/3 to (nearly) 1/2, the lobes 1.5-2.5(-3) mm long. Androecium 3-4(-5.5) mm; androphore 1.5-2 by 0.4-0.6 mm, hairs 0.1-0.3 mm in the lower 2/3-1/3, rarely glabrous; synandrium (2-)2.5-4 by 0.6-0.8(-l) mm, thecae 10-16(-20?), sterile apex more or less acute to flat, 0.2-0.3 mm or less, minutely lobed. Female flowers: pedicel 2-2.5 mm; buds ovoid, 4 by 3-3.5 mm, the lobes 1.5(-2) mm; ovary ovoid, 2.5-3 by 2-2.5 mm, hairs 0.2 mm. Fruits 1-3(-5) per infructescence, (sub)globose, 1.5-3.2(-4) by 1.5-2.5(-3) cm, with scurfy hairs, (0.1-)0.3 mm; the pericarp (1—)2—5 mm thick; seeds sub-globose or broadly ellipsoid, l-2(-2.2) cm; fruiting pedicel slender or rather thick, 2-5 (-7) mm.
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