Tree 10-35 m. Twigs ± angular or subterete, or more or less flattened, distinctly lined or ridged (sometimes lines evident only in part of the material), 2-7(-18) mm diameter, generally early glabrescent, hairs rusty, (0.1-)0.2-0.4 mm long; bark finely to coarsely striate, not flaking; lenticels present but not much contrasting. Leaves membranous, elliptic-oblong to oblong(-lanceolate), 12-26(-30) by 4—9(—11) cm, base cuneate, apex acute-acuminate; upper surface glabrous, drying olivaceous to brown or sometimes blackish, lower surface drying light brown, early glabrescent, midrib sometimes later glabrescent; dots absent; midrib raised above, glabrous; nerves 12-20 pairs, raised above, lines of interarching usually not distinct; venation lax, usually not distinct above; petiole 8-13(-20) by 2-3 mm, glabrescent; leaf bud 8-15 by 3-4 mm, hairs 0.2-0.4 mm long. Inflorescences with sparse to dense dendroid hairs 0.2-0.5 mm, sometimes glabrescent; in male: 3 or 4 times branched, many-flowered, 7-18(-22) by 5—16(—18) cm, peduncle 0.6-1.8 cm long, the flowers in loose clusters of 3-6; in female: many-flowered, 3-8 by 2-6 cm; bracts oblong-lanceolate, acutish, 3-5 mm long, pubescent, caducous; flowers with perianth 3-(or 4-)lobed, glabrous, pedicel pubescent in various degrees, hairs 0.1-0.2 mm long (in female glabrescent), articulated. Male flowers: pedicel (1—)1.5—2.5 mm long; buds (depressed-)globose to broadly obovoid, in cross section rounded or slightly angular, 1-1.5 by 1.2-1.8 mm, base rounded to short-cuneate, not or but little collapsing on drying, cleft 1/2-2/3, lobes 0.2-0.4(-0.5) mm thick; androecium depressed-globose to obovoid in outline, (0.5-)0.7-l by 0.8-1.2 mm, ± rounded or usually ± triangular in cross section (Plate 3: 64)\ thecae 12-20, anthers 0.5-0.7 mm long, mutually free for about halfway, usually curved towards the centre, column largely hollowed out, at base continuing into the 0.2-0.3 mm long androphore, slightly tapering or not. Female flowers: pedicel 1-1.5 mm long; buds broadly ellipsoid, 2.2-2.5 by 1.8-2 mm, cleft c. 1/3; ovary ovoid, 1-1.4 by 0.8-1.2 mm, glabrous, the stigma 2-lobed, 0.2 by 0.4 mm. Fruits 4-12(-20) per infructescence, broadly ellipsoid, apex narrowly rounded, base (broadly) rounded, 2-2.8(-3) by 1.8-2.2(-2.6) cm (see note 3), glabrous, drying brown to dark brown, neither warted nor lenticellate, pericarp 1.5-4 mm thick; fruiting pedicel 1.5-3 mm long; perianth not persistent.
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