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Leaf-lamina very large, 13–23 × 11–17 cm., suborbicular, emarginate at the apex, cordate at the base; upper surface finely reticulate, substrigose, with straight single (rarely geminate) subappressed pachydermatous hairs (becoming sparse with age); lower surface discolorous, greyish-or brownish-floccose-tomentose, with relatively long dense curled lepto-mesodermatous (thin-to medium-walled) hairs on the nerves and veins, and with the reticulations and interreticular areoles covered with minute stellate hairs; extra leaf-glands in the axils of the lateral nerves; lateral nerves in 10–11 pairs (with a weak tendency to formation of short subsidiaries), slightly depressed above and very prominent and very thick beneath, slightly curving towards the apex, many of them producing 1–3 bifurcations on the side nearest the base of the leaf before reaching the margin, nerves and bifurcations anastomosing on the thickened margin; veins prominent and conspicuous; reticulation partially hidden by hairs; petiole 2–3·5 cm. long, thick.
Fruit 15–23 mm. in diam., spherical, slightly depressed at the apex, brownish, subsericeous-pubescent; wings 6–7 × 2·5 cm., yellow or reddish, broadly oblanceolate.
Inflorescences axillary, few-flowered, subsessile, often condensed in subterminal clusters, densely rufous-tomentose; pedicels 3–6 mm. long.
Shrub to small tree up to 8 m. high; branchlets pubescent, becoming glabrous.
Stamens with anthers produced into a short triangular apiculus.
Petals 11–12 mm. long, rufous-sericeous-tomentose.
Sepals 7 mm. long, rufous-sericeous-tomentose.
