Small tree, up to 6 m high. Leaves oblong to narrowly obovate, ca 20-30-nerved, 18-45 by 8-16 cm, with obtuse, often acuminate apex, rounded to obtuse base and slightly to manifestly dentate margin. Petiole ca 3-6 cm long; wings near their base 4-9 mm broad, gradually narrowing towards the base of the blade, coherent with the blade over a breadth of 1½-2mm, when older loosening from the base of the blade and near the base of the petiole, but not caducous. Raceme up to 20-flowered, up to 60 cm long, distinctly zig-zag. Flowers ca 6½ cm diam. Sepals 5, ca 17-20 by 14-15 mm. Petals yellow, ca 33 by 22 mm. Stamens ca 130, 11-13 mm long. Carpels 5-6, ca 8-10 by 2 mm with ca 5 mm long styles, the carpels and the base of the styles densely covered with rigid, up to 2 mm long hairs; each with ca 20 ovules. Fruit dehiscent, but the carpels possibly only slightly spreading, the young fruit not enclosed by the sepals. Carpels 25 by 16 mm, 1-3-seeded. Seeds 4 by 2½ mm, with a 0.2-0.4 mm long membranaceous aril.
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