Tree 18-22 m. Twigs 3 mm diameter, early glabrescent, hairs less than 0.1 mm; older twigs not seen. Leaves thinly chartaceous, oblong-lanceolate, 14-24 by 4-7 cm, base subcuneate or narrowly rounded, apex blunt or subacute; upper surface olivaceous or brown, lower surface grey-or pale greenish brown, glabrescent, hairs widely scattered, scale-like, less than 0.1 mm; not papillose; dots absent; midrib ± flat above, lateral nerves 15-20 per side, at 45-70° to the midrib, flat or sunken, little raised below, reddish brown, contrasting, lines of interarching indistinct, venation sunken and faint above, reddish brown, contrasting below; petiole 15-25 by 2-2.5 mm; leaf bud 15 by 2.5-3 mm, hairs 0.1 (-0.3) mm. Inflorescences pedunculate, between the leaves, (early) glabrescent, hairs scattered, pale, 0.1 mm, like on the flowers; bracts 2 mm, caducous; in male: peduncle (15-)20 mm long, ending in one or two (sub)sessile scar-covered brachyblasts to 5 mm long, each with a subumbel of (2-)3-5 flowers, buds of various sizes; in female (from infructescences): 5-12 mm pedunculate, 1-flowered. Male flowers: pedicel 6-7 by 1.5-2 mm, bracteole 3-3.5 mm, caducous, scar conspicuous; buds leathery, ovoid-ellipsoid, 7-7.5 by 6 mm, cleft c. 1/2, lobes 3.5 mm long, 0.5 mm thick. Androecium 5.5 mm; androphore (1-)1.5 by 0.4 mm, glabrous; synandrium 4 by 1.2-1.4 mm, thecae 16-18, sterile apex ± cushion-shaped, impressed in the centre, 0.3(-0.4) mm high. Female flowers not known. Fruits single, obovoid-oblong, 5-5.5 by 3 cm, apex ± blunt or subacute, basal part narrowed, early glabrescent, hairs ± scattered, appressed, rather pale, less than 0.1 mm; pericarp hard, 5(-7) mm thick; seeds ellipsoid-oblong, 2.5(-3) cm, with hard, bony, yellowish brown testa; peduncle of infructescence 5-12 by 3-4 mm, fissured, with scattered small lenticels, passing into fruiting pedicel, 5-7 by 3 mm, striate.
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