Large tree, 12–40 m. high, with tall sharp buttresses and smooth grey bark. Twigs corky with many raised lenticels, glabrous to puberulous. Leaf-blades chartaceous or thinly coriaceous, ovate to ovate-oblong, 6.5–17 cm. long, 3.5–9.5 cm. wide, shortly apiculate, rounded to cordate at the base, entire or very obscurely sinuate, glabrous or puberulous on the veins beneath, minutely punctate beneath, scabrous when mature, penninerved with 5–8 veins on each side of the midrib; petiole 5–12 mm. long. Stipules linear, 4–5 mm. long, pubescent, caducous. Inflorescences in the axils of fallen leaves of the previous season’s growth, congested cymose with many clustered ♂ flowers and fewer hermaphroditeflowers above on slender 4–8 mm. long pedicels. Calyx-tube very short; lobes 4–6, ± 1 mm. long. Stamens 7–12. Samara shortly stipitate, suborbicular to obovate, 3.5–4.5 cm. long, 3–3.5 cm. wide, with papery and radially veined wings, subglabrous; styles 4-6 mm. long; nutlet in the lower half of the wings, 9–13 mm. long, 6–8 mm. wide. Fig. 1.
