Tree 15-40 m. Twigs 3-6(-8) mm diameter, rusty woolly-tomentose with hairs 0.5-1 mm long, glabrescent, greyish, bark smooth or finely cracked, densely set with lenticels. Leaves coriaceous, elliptic to lanceolate, 18—42 by 7.5—19 cm, base short-attenuate to rounded or subcordate, apex acute(-acuminate), margin often revolute; upper surface olivaceous, often glossy, lower surface grey-brown, hairs dense, rusty, 0.5 mm long, glabrescent; midrib above flat, 1-2 mm wide, nerves (13-) 15-23 pairs, at 60-70° to the midrib, prominent below, venation indistinct on both surfaces; petiole late glabrescent, 10-20 by 3-5 mm; leaf buds 10-20 by 4-6 mm, with dense brown hairs 0.5-1 mm. Inflorescences paniculate, with hairs 1-2 mm long; in male 6-10 cm long, up to 6 cm wide, many-flowered, in female 2-5 cm long, fewer-flowered; bracts triangular, 2-4 mm long, pubescent, caducous. Flowers rusty pubescent inside and outside, hairs 0.2-0.3 mm long. Male flowers: pedicel 1-3 mm long; buds ellipsoid-oblong, 4-6 by 2-3 mm, cleft 1/4 to nearly 1/2, lobes (long) triangular, slightly spreading, tube 2.5-3.5 mm long; androecium truncately ellipsoid, (sub)sessile, 1.5-2 by 0.8-1.2 mm; anthers (7-)9 or 10, subsessile, free apices ± erect, 0.2-0.3 mm long. Female flowers (immature): pedicel 1 mm long; buds coriaceous, ovoid, 4-6 mm long, lobes 3; ovary subglobose, densely pubescent, stigma sessile. Fruits 2-8 per infructescence, ellipsoid(-oblong), 2.2-3.5 by 1.5-2.2 cm, with rusty hairs 0.3(-0.5) mm long; pericarp 3 mm thick; fruiting pedicel 3-5 mm long.
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