Tree 10-21 m. Twigs ridged and angular, especially in the apical part, 2-5(-7) mm diameter, early glabrescent, hairs grey-brown to 0.1 mm; bark faintly striate, not flaking; lenticels abundant, inconspicuous. Leaves thinly chartaceous, (elliptic-)oblong, 8-20 by 2.5-7.5 cm, base attenuate, apex bluntish to acute-acuminate; upper surface drying olivaceous to blackish brown, sometimes indistinctly pale-pustulate, lower surface early glabrescent; dots present (lens!); midrib slender, slightly raised above; nerves 8-13 pairs, thin, flat, indistinct, lines of interarching beneath fairly regular but indistinct; venation lax, indistinct on both surfaces; petiole 14-30 by 1.5-2.5 mm; leaf bud 10-14 by 1.5-2 mm, with hairs 0.1 mm long or less. Inflorescences glabrescent or with scattered scale-like hairs less than 0.1 mm; in male: 2 (or 3) times branched, 3-10 by 1.5-4.5 cm, the primary branches ± spike-like; in female: 3-5 cm long; peduncle 0.1-1.2 cm long; bracts elliptic, 1-3 mm long, with fimbriate margin, caducous; flowers solitary or up to 4 together, glabrous; perianth 2-lobed, pedicel not articulated. Male flowers: pedicel 1-2 mm long; buds subglobose, slightly broader than long, not or but little laterally compressed, together with the pedicel sometimes slightly pear-shaped, 2.2-2.5 by 2.5-3 mm, apex broadly rounded, basal part rounded or shortly tapering, cleft 9/10, lobes 0.2-0.5 mm thick, not collapsing on drying; androecium blunt-quadrangular in outline, sometimes broader than long, laterally compressed, 1.5 by 1.5-2 mm, apex broadly rounded (Plate 1:4); thecae 20-24(-28?), 1.5-2 mm long, free apices long, 0.7-1 mm, at one side of the androecium strongly incurved into the central hollow, almost reaching the base; androphore up to 0.1 mm long. Female flowers: pedicel 1-1.5 mm long; buds ovoid-ellipsoid, 2-2.5 by 2 mm, cleft c. 2/3; ovary ovoid, 1.5 by 1.2 mm, glabrous, stigma sessile, minutely 2-lobed, 0.2 mm. Fruits solitary or up to 6 per infructescence, ellipsoid, apex rounded to subacute, base ± rounded, 2 by 1.4-1.5 cm, glabrous, drying dark brown, without or with only small tubercles or lenticels; pericarp 1.5 mm thick; fruiting pedicel 2-6 mm long; perianth not persistent.
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