Tree 5-25 m. Twigs 3-6(-15, in fruiting twigs) mm diameter, glabrescent, hairs reddish or grey-brown, 0.1-0.3 mm; bark finely striate, not flaking, lenticellate. Leaves membranous, (oblong-)lanceolate, 20-40 by 4.5-12.5 cm, base attenuate, apex acute-acuminate; upper surface drying olivaceous, usually minutely pale-punctate; lower surface (late) glabrescent, hairs scattered, 0.1-0.3 mm, on and near the midrib; dots absent; midrib ± flat above; nerves 14-24 pairs, thin, ± flat above, lines of interarching ± irregular but distinct; venation lax, indistinct; petiole 5-20 by 2-3.5 mm; leaf bud 20-25) by 2.5-3.5 mm, with hairs 0.1-0.3 mm. Inflorescences with sparse woolly stellate-dendroid hairs 0.2-0.4 mm; in male and female (from infructescences): 3 or 4 times branched, many-flowered, 10-16 by 8-12 cm, peduncle 1-4 cm; bracts not seen, caducous; flowers in loose clusters of 2-5, glabrous, perianth 2-lobed, pedicel slender, not articulated. Male flowers: pedicel 2-4.5 mm long; buds somewhat laterally compressed, subcircular, (2-)2.5-3 by (2.5-)3-3.5(-4) mm, apex broadly rounded, base rounded to short-attenuate, cleft 1/2-2/3; lobes 0.2-0.3 mm thick; androecium laterally much compressed, apex rounded-truncate, 1.4-1.8 by 1.5-2.2 mm (Platel: 28); thecae 24-28, mutually appressed, erect, free apices 0.1 mm; androphore up to 0.2 mm; column narrowly hollowed for 1/4-1/2. Female flowers not seen. Fruits up to 10 per infructescence, ellipsoid, 1.7-2.2 by 1.2-1.7 cm, with rusty hairs 0.2 mm long, sometimes only remaining at the very base; pericarp 1-2 mm thick, without or with scattered small lenticels or wartlets; fruiting pedicel 2-8 mm long; perianth not persistent.
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