Tree 5-12 m. Twigs (3-)4-5(-12) mm diameter, early glabrescent, hairs greyish to rusty, 0.1 mm; bark striate, not flaking, lenticels large, usually not much contrasting in colour. Leaves thinly coriaceous, elliptic-oblong, 12-29(-32) by 4.5-8.5(-10) cm, base attenuate, apex acute-acuminate; upper surface drying dark brown, minutely pustulate or not, lower surface early glabrescent; dots absent; midrib slender to rather broad, flat-tish above; nerves 12-18 pairs, thin and flat above, beneath lines of interarching with irregular loops, distinct or not, venation lax, indistinct; petiole 6-18 by 2-3.5 mm; leaf bud 10-20 by 1.5-3 mm, hairs 0.1 mm. Inflorescences below the leaves, with rusty stellate hairs 0.1 mm long or less; in male: 2 or 3 times branched, rather slender, (4-)6-14 by 2-9 cm, peduncle 1-2.5 cm long; in female: up to 5 cm long, peduncle 1 cm long; bracts pubescent, 1.5-4 mm long, caducous; flowers (in male) solitary or in loose clusters of 2-5, glabrous or glabrescent, hairs scattered, less than 0.1 mm, perianth 2-lobed, pedicel ± tapering, not articulated. Male flowers: buds in lateral view subcircular, 3-3.5 by 3(-4) mm, apex broadly rounded, the lower half ± tapering into the thickish tapering pedicel, (2-)3-4 mm long; perianth cleft 1/2 to nearly 2/3, lobes 0.2-0.3 mm thick, often with a few coarse blackish brown wart-like dots; androecium thickish, not much laterally compressed, above broadly rounded, (1.5-)2-2.2 by 2-2.2(-3) mm (Plate 2: 34); thecae 16-24, erect, 2 mm long, free apical parts 0.1-0.2 mm, column narrowly hollowed for 1/5-1/4, androphore 0.2-0.3 mm long. Female flowers: pedicel 4-5 mm long, minutely pubescent; buds narrowly ovoid, almost glabrous, with a few coarse, dark brown wart-like dots, 4.5 by 3 mm, cleft 1/4-1/3, lobes 0.3-0.4 mm thick, coriaceous; ovary ovoid, somewhat dented or corrugated, 2.5-3 by 2.5 mm, with dense hairs less than 0.1 mm long, style and 2-lobed stigma glabrous, 0.8-1 mm long. Fruits l(-4) per infructescence, ramiflorous, broadly ellipsoid to subglobose, somewhat flattened, 6-7.5 by 4.5-6.5 cm, coarsely flanged and corrugated, drying blackish brown, with scattered, coarse, paler coloured tubercles, glabrescent, at base sometimes a short pseudostalk, apex acutish, pericarp ± woody-corky, 10-20 mm thick; fruiting pedicel 5-10 mm long; perianth not persistent.
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