Tree 25-30 m. Twigs 3.5-6 mm diameter; bark not flaking. Leaf blades 25-35 by 7-13 cm. Male inflorescences 10-20 by 7-11 cm, the rachis at base 3.5-4.5(-5) mm diameter; flowers erect. Male flowers: pedicel 1-1.5 mm long; buds broadly ellipsoid, 2.6-2.8 by 2.5-2.7 mm; lobes 3, cleft nearly halfway; androecium 1.3 by 0.8 mm, subtriquetrous in cross section; thecae 14 or 16. Female inflorescences (0.5-)l-8 cm long, once (or twice) branched. Female flowers: pedicel 1.5-2 mm, glabrous or with some minute hairs towards the base; buds ovoid-ellipsoid, 4-4.5 by 3-3.5 mm, lobes 3, cleft to nearly halfway, lobes 0.8(-l) mm thick; ovary ovoid, 2.2 by 2 mm, glabrous, stigma broadly 2-lipped, 0.3 by 1 mm.
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