A large tree, up to 30 m tall, with grey bark and rusty pubescent young parts. Leaves oblong, broadly obovate to ovate, orbicular or rectangular, 10-40 cm long, 8-35 cm broad, cordate, often peltate, margin wavy to distantly coarse toothed or irregularly lobed; silvery to rusty pubescent beneath, glabrescent and dark green above; petiole 5-15 cm long, densely tomentose at the base; stipules pinnatifid, caducous. Flowers mostly solitary, 10-15 cm long and across, white, fragrant; pedicel c. 2 cm long; bracts laciniate. Sepals linear-lanceolate, united at the base into short tube, 8-12 cm long, c. 1 cm broad, obtuse, rusty pubescent outside, thick, reflexed, deciduous. Petals linear-oblong or obovate, 6-12 cm long, c. 1 cm broad, reflexed, obtuse. Fertile stamens 5-9 cm long, staminodes equalling the petals; anthers 1-1.5 cm long. Carpels 5; ovary oblong, pentagonal, 5-loculed, densely rusty tomentose. Capsule 5-10 cm long, 5-valved, rusty brown-glabrescent. Seeds compressed, obliquely oval, wings brown, membranous.