Trees, more than 35 m tall with diam. up to 186 cm; buttresses up to 2 m tall. Twigs terete, striate, leaf scars triangular, conspicuous. Leaves sessile; lamina obovate to elliptic, 20-32 by 7-9 cm, coriaceous, papyraceous when young, base attenuate, apex acuminate, acumen up to 1 cm long; midrib raised above, very prominent beneath, lateral nerves c. 8 pairs, angle with midrib c. 60°, slightly flattened above, prominent beneath, arcuate and anastomosing near margin, tertiary nerves irregularly transverse, faint above, conspicuous beneath, veins ending in a minute, sharp, black notch at sinus of crenulation. Inflorescences up to 15 cm long. Flowers white, c. 2.5 cm long, c. 1.5 cm wide when open, pedicels 0-3 mm long, articulate at the base. Calyx tube obconical, c. 6 mm long; lobes 4, orbicular, 4-5 mm diam., apex rounded. Petals orbicular-ovate, c. 1 by 1 cm, papyraceous, apex round. Stamens: tube c. 2 mm high; filaments c. 1 cm long; anthers ellipsoid, c. 1 mm long. Style up to 2.5 cm long. Fruits ellipsoid or suborbicular (including wings), 2-3 cm long, nearly as wide, base rounded, apex retuse; seed-bearing portion very narrow, thin-walled, usually about 5 mm thick; wings 1-1.3 cm wide, transversely nerved. Seeds oblong, 6-7 mm long.
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A tree. It grows 40-6 tall. It can be 360 m across. The leaves are simple and arranged in spirals. They are broadly oval and 10-16 cm long by 5-8 cm wide. It tapers to the base and are rounded at the tip. The flowers are white. They are 2.5 cm long and 1.5 cm wide. The fruit is almost round and has wings. It is 2.3 cm long. The seeds are 6-7 mm long.
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