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Leaf-lamina up to 12 × 14 cm., palmately 5–9-lobed, cordate, lobes ovate to oblong, shortly acuminate at the apex, sparsely stellate-pubescent when young, later glabrous except sometimes for a few hairs at the base of the nerves on the lower surface; petiole up to 5 cm. long, sparsely stellate-pubescent or glabrous; stipules c. 7 mm. long, very caducous, subulate, stellate-pubescent.
Flowers in reduced 1–4-flowered axillary or terminal cymes; pedicels c. 1·5 cm. long, stellate-pubescent; bracts up to 8 mm. long, caducous, ovate, obtuse, concave, sparsely stellate-pubescent; bracteoles c. 7 mm. long, broadly ovate, densely pubescent, forming an involucre round the base of the calyx.
Petals 5, c. 3·5 × 2·5 cm., whitish or yellowish but deep red towards the base, broadly obovate, apex rounded or emarginate, clawed at the base, with an inconspicuous appendage c. 1 mm. long at the base of the lamina, pubescent on both surfaces of the lamina, densely hirsute inside just above the claw.
Stamens very numerous; filaments 6–8 mm. long, joined below in pairs or triads; staminodes 5, c. 6 × 4 mm., contorted, ovate to ovate-oblong, very concave, scarious, glabrous.
Calyx c. 2 cm. long, with deltoid acute lobes c. 8 × 7 mm., broadly funnel-shaped, stellate-tomentose on both sides.
Large tree up to 18 m. tall with a straight bole and light-grey smooth flaking bark; branchlets slender, glabrous.
Fruit of 5 tomentose carpels, each with a unilateral, obovoid-oblong, stiffish, pubescent wing up to 7 × 2·8 cm.
Ovary ovoid, 5-angled and 5-locular, densely hirsute; style 2 mm. long, pubescent; ovules 10–12 per loculus.
Androgynophore 9 mm. long, 3 mm. in diam., sulcate or angular, densely appressed-hirsute above.
Disk inconspicuous, annular.
