Tree c. 20 m. Twigs 2-3(-4) mm diameter, early glabrescent, hairs greyish brown to rusty, 0.1-0.2 mm long; bark finely striate, not flaking; lenticels not much contrasting. Leaves membranous, (elliptic-)oblong, 10-15 by 4-7 cm, base short-attenuate, apex short acute-acuminate; upper surface dark brown, lower surface pale or bright brown, glabrous; dots absent; midrib ± flat above; nerves 10-13 pairs, thin and flat above, lines of interarching invisible; venation lax, very faint on both surfaces; petiole 11-15 by 1.5-2.5 mm, glabrous; leaf bud slender, 7-10 by 1.5-2 mm, with dense (grey-)rusty hairs 0.1-0.2 mm. Inflorescences behind the leaves, with ± sparse hairs 0.1 mm; in male: 3 (or 4) times branched, ± many-flowered, 7-10 by 5-8 cm, peduncle (0.2-)0.6-1.2 cm long; in female: 3.5 cm long (stout, as seen in infructescences); bracts caducous, not seen; flowers in male in clusters of 3-5, perianth 3-(or 4-)lobed, glabrous, pedicel glabrous or with some minute hairs towards the base, not or faintly articulated. Male flowers: pedicel 1-2 mm long, slender; buds subglobose, 2-2.2 by 2-2.3 mm, cleft 2/3-4/5, lobes 0.2-0.3 mm thick; androecium (depressed) globose-ovate, apex narrowly, base broadly rounded, 1 by 1-1.2 mm, in cross section (sub)circular (Plate 3: 85); thecae 16-20, almost completely sessile, free apices sometimes ± sterile, up to 0.1 (-0.2) mm long, concealing the narrow, 0.1-0.2 mm deep apical cavity of the column; androphore narrow, to 0.2 mm long, hidden by the anthers. Female flowers not seen. Fruits (of S 36305, see note 2) 2 or 3 in a short, stout infructescence, broadly ellipsoid, 5-5.5 by 3.5-4 cm, glabrous, with a few, small tubercles, pericarp 7-10 mm thick, perianth not persistent.
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