Tree to 30 m tall. Leaves entire; petiole 1.2-3.5 cm long; lamina lanceolate, linear-lanceolate to almost spathulate, 20-46 cm long, 5-21 cm wide, glabrous above except for midrib; base narrowly attenuate, densely ferruginous-pubescent below, with both appressed and ascending, erect hairs; margin usually smooth (lobed on small trees); apex usually acuminate, obtuse or emarginate; veins 25-50 pairs. Conflorescence ±erect, 14-22 cm long; mature common bracts c. 10-15 mm long, 10-15 mm wide, absent at anthesis. Tepals 2.5-3.3 cm long. Anthers 2.5-3.5 mm long; mucro c. 0.5-1.3 mm long. Ovary 1.7-2.8 mm long, ferruginous-sericeous; style 2-3 cm long; pollen presenter 2.2-3.5 cm long. Fruit 7-8 cm long, 2.5-3.5 cm wide, 1-1.5 cm thick. Seeds c. 7-8 cm long, 2.5-3 cm wide; wing c. 4-15 mm wide; embryo 3-4 cm long, 1.5-2 cm wide.
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