Tree 10-25 m. Twigs faintly ridged or not, 2-4 mm diameter, early glabrescent, hairs greyish brown, 0.1 mm long or less; bark striate, not flaking; lenticels small but distinct. Leaves membranous, oblong(-lanceolate), 8-17 by 3.5-6 cm, base attenuate, apex acute-acuminate with the very tip usually ± blunt; upper surface drying dark brown, lower surface early glabrescent, hairs less than 0.1 mm; dots absent; midrib slightly raised above; nerves 8-12 pairs, above thin and flat; venation lax, very faint on both surfaces; petiole relatively long, 15-24 by 1-2 mm, leaf bud 10 by 1 mm, with hairs less than 0.1 mm. Inflorescences glabrescent or with sparse hairs 0.1 mm, 2 or 3 times branched, many-flowered; in male: 7-12 by 4-6 cm, peduncle 0.5-1.5 cm long; in female: 2-4 by 1.5-2 cm; bracts not seen, caducous; flowers (male) in loose clusters of 2-7, glabrous, perianth 3-(or 4-)lobed, finely punctate, pedicel not articulated. Male flowers: pedicel slender, 2-3 mm long; buds broadly ellipsoid-obovoid, ± triangular, 1.5-2 by 1.4-1.6 mm, apex ± acute, base ± attenuate, cleft c. 5/6, lobes 0.1 mm thick; androecium ± obovoid, ± blunt-triangular, 1.5 by 1-1.2 mm (Plate 1:73); thecae 24-28, tightly appressed (sometimes touching each other in a fish-bone pattern), free apices 0.2-0.5 mm long, j ± curved into the apical hollow, column broad with hollow to c. 1/3, androphore up to 0.1 mm long, narrow. Female flowers: pedicel 1.5-2 mm long; buds ellipsoid, 2 by 1.6-1.8 mm, 3-or 4-lobed, cleft almost to the base; ovary ovoid, 1.5-1.8 by 1.2-1.5 mm, glabrous, style absent, stigmas relatively very large, consisting of two broad fleshy lobes 1 by 0.2 mm, only 0.1 mm high. Fruits not seen.
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