Tree 2-10(-20) m. Twigs 1—3(—8) mm diameter, early glabrescent, at first with grey-brown hairs 0.1 mm long or less; bark finely striate, not flaking; lenticels fine, usually present. Leaves membranous or in var. calcarea ± chartaceous, elliptic to oblong-lanceolate, 6-28 by 2-9.5 cm, base attenuate, apex acute-acuminate; upper surface drying dull olivaceous to brown, with or without fine paler dots, lower surface early glabrescent, hairs 0.1 mm or less; dots absent; midrib slightly raised above; nerves 6-16 pairs, above thin, flat or raised above, lines of interarching faint or distinct; venation lax, usually distinct; petiole 5-13 by 1-2.5 mm; leaf bud 6-12 by 1.5-2 mm, with hairs 0.1 mm. Inflorescences glabrescent or with sparse stellate scale-like hairs 0.1-0.2 mm long; in male: 1—2(—3) times branched, few-to many-flowered, 2-8(-9) by 1.5-6 cm, peduncle up to 1 cm long; female 2-5(-8) cm long; bracts 0.5-2 mm long, glabrescent, with fimbriate margins, caducous; flowers in male in loose clusters of 1—8(—10), glabrous, perianth 2-lobed, pedicel slender, not articulated. Male flowers: pedicel 1-3 mm long; buds compressed, in lateral view circular, ± broadly transversely subellipsoid, or broadly obtriangular (rarely slightly longer than broad), collapsing on drying, 1.3-2.4 by 1.8-3 mm, apex subtruncate or (broadly) rounded, base subtruncate to short-cuneate, cleft 1/5—1/3(—1/2), lobes 0.1-0.2 (in var. aucta up to 0.5) mm thick; androecium flattened towards the apex, base broad and usually almost cylindrical, in lateral view sub-quadrangular, apex broadly rounded or subtruncate, nearly filling the perianth, (0.7-)l-1.7 by 1.4-1.6 mm (Plate 1: 24); thecae 18-24, ± erect, free apices to 0.1 mm long, column narrowly hollowed for 1/4-1/3; androphore ± slender, 0.2-0.5 mm long, sometimes ± hidden by sagged anthers. Female flowers: pedicel 1-5 mm long; buds broadly ellipsoid, ovoid, or subglobose, 1.8-2.5 by 2-2.5 mm, cleft c. 1/3; ovary ovoid, 1.1-1.5 by 0.8-1.1 mm, glabrous, style with minutely bilobed stigma, 0.2 mm long. Fruits (1-) 5-15 per infructescence, globose or subglobose, 0.9-1.3 by 0.8-1.3 cm (pseudostalk up to 1 mm), or in varieties larger, rather ellipsoid, 1.4-2 by 1.1-1.4 cm, with the apex rounded to acutish, base rounded, without or with pseudostalk up to 3 mm; glabrous, drying blackish, without or with minute paler tubercles or lenticels; pericarp l(-2) mm thick; seeds subglobose to ellipsoid; fruiting pedicel 1-7 mm; perianth not persistent.
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