Tree (3-) 12-30 m. Twigs somewhat angular (sometimes with faint ridges between insertions of petioles), 1-2 mm diameter, reddish or yellowish brown, early glabrescent, hairs fine-woolly, (0.1-)0.2 mm; older twigs (faintly) cracking, sometimes flaking; lenticels inconspicuous. Leaves membranous or thinly chartaceous, elliptic-oblong or oblong-lanceolate, 8-16 by 2-6 cm, base cuneate, apex acute-acuminate, the tip sometimes ± blunt; upper surface olivaceous or (blackish) brown, lower surface (grey-)brown, early glabrescent, hairs scattered, scale-like, 0.1 mm; not papillose; dots absent; midrib above raised or ± flat, lateral nerves 10—15(—17) per side, at 45-60° to the midrib, flat or sunken (and faint) above, little raised below, lines of interarching and venation indistinct; petiole comparatively long, 12-20 by 1-1.5 mm; leaf bud 6-12 by 1-2 mm, hairs 0.1 mm or less. Inflorescences between the leaves and below, of the Knema-type: sessile simple or forked brachyblasts, 2-4 mm long, with hairs 0.2 mm; bracts minute; in male: with one or two subumbels of 3-6(-12) flowers, buds of various sizes or almost equal in size; female similar to male, (l-)2-4(-10)-flowered; flowers with hairs 0.1-0.2 mm or less. Male flowers: pedicel (4-)6-7 by 0.5 mm, bracteole persistent, ovate, 1-1.5 mm; buds ovoid(-ellipsoid) or ovoid-oblong, (4-)5-6 by 2.5-3 mm, apex ± acute, cleft (1/5—)l/4, lobes 0.2 mm thick. Androecium 3-5.5 mm long; androphore 1-2 by (0.3-) 0.4-0.6 mm, with hairs 0.1-0.3 mm in the lower half; synandrium 2-3.5 by 0.6-0.8 mm, apex blunt or acutish, thecae (8-) 10-14, sterile apex 0.1 mm. Female flowers: pedicel 3-4.5 by 0.7-1 mm, bracteole rounded, 1 mm, caducous, (sub)apical; buds ovoid(-ob-long), 4(-4.5) by 2.5-3 mm, apex ± blunt, lobes 1.5-1.7 mm long; ovary ovoid, including short stigma 3-4 by 2.2-2.5 mm, hairs 0.1-0.2 mm. Fruits solitary or 2 (or 3) per infructescence, (broadly) ellipsoid to globose, 2-3.5 by 1.5-3 cm, apex broadly rounded or subacute, hairs brown, scurfy, 0:1-0.2 mm or less, partially (late) glabrescent; pericarp 3-8 mm thick; seeds broad-ellipsoid, 2 cm, blackish, deeply broadly grooved by impression of the aril; fruiting pedicel usually slender, 2-5 mm long.
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