Large tree up to 30 m tall, 60 cm ø, with short bole, dull red-brown flaky bark, and reddish wood. Leaves ovate or obovate to elliptic-oblong, c. 15-23(-32)-nerved, (18-) 30-65 (-80) by (10-)18-30 cm, with rounded, often slightly retuse, apex, obtuse base, and undulate to shallowly dentate margin. Petiole 10-18 (-25) cm long, with linear-lanceolate, up to 18 mm broad, densely sericeo-hirsute, wholly caducous wings. Racemes 2(-3)-flowered, up to c. 15 cm long, with axis densely sericeo-hirsute and usually curved backward. Flowers not expanding, the sepals only slightly diverging in anthesis, the petals falling off collectively without spreading. Sepals 5, c. 35-45 by 28-35 mm. Petals 5, yellow, cuculiate when falling, c. 35-50 by 18-23 mm. Androecium with c. 325 10-15 mm long stamens on the inside and c. 365 3-10 mm long staminodes. Carpels 10-11, c. 8 by 3½ mm with c. 9 mm long styles, each with c. 6-16 ovules. Fruit dehiscent, the sepals enlarged up to c. 65 by 40 mm. Carpels c. 30-35 by 30-34 mm, up to 2-seeded. Seeds c. 6 by 4½ by 3 mm, enclosed by rather thick fleshy white c. 7-8 mm long aril.
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