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A small to medium sized tree. It loses its leaves during the year. The trunk is short and crooked. The crown is round. The bark is smooth and light brown. The young twigs have small white hairs. The leaves are opposite and simple. They are oblong and have fine hairs. The flowers can be 7 cm long. They are in spikes in the axils of leaves. They are greenish-yellow. The flowers appear with the new leaves. The fruit has 4 wings. They are 8 cm long by 8 cm wide. They are yellowish-green but ripen to light brown.
Leaves opposite or 3-verticillate; lamina up to 14(22) x 9(11) cm., chartaceous, broadly to narrowly elliptic or obovate-elliptic or oblong-elliptic, usually tomentose (when young) or pubescent to almost glabrous (except for scales), lepidote but scales rather inconspicuous, apex usually rounded to obtuse, sometimes acute, base usually rounded, sometimes slightly cordate; lateral nerves 5–12 pairs, prominent below; petiole up to 1 cm. long.
Fruit usually c. 5·5 x 5 cm. (rarely only 3–3·5 x 3–3·5 cm. and occasionally up to 10 x 8 cm.), subcircular in outline, usually glabrescent, sometimes conspicuously lepidote on the body, apical peg very short or absent, wings up to 3·5 cm. broad, stipe 1–3 cm. long, usually relatively slender.
Cotyledons 3·5–4 x 6 cm., subcircular to transversely elliptic, with free petioles sometimes c. 2 mm. long (petioles united for the rest of their length) or the two cotyledons united completely to form a single peltate organ c. 6 cm. in diam., arising as for the section.
Small to medium-sized deciduous tree up to 10(12) m. high or rarely a shrub; crown rounded or flat-rounded; bark brown or grey-brown, smooth to scaly, generally fissured; branchlets usually tomentose.
Inflorescences usually unbranched axillary spikes up to 8 cm. long including the rather short tomentose peduncle; rhachis tomentose; bracts c. 2 mm. long, caducous.
Style c. 5 mm. long, glabrous, with swollen apex (while functional), usually exserted and rather conspicuous before the stamens appear.
Small to medium-sized deciduous tree, up to 10 m high. Fruit up to 60 mm long. Petals obovate-spathulate to spathulate, yellow.
Lower receptacle 2–3 mm. long, tomentose; upper receptacle c. 3 x 2·5–3 mm., shortly infundibuliform, pubescent and lepidote.
Stamen-filaments 5–8 mm. long, often reflexed at about 1 mm, below the anthers; anthers orange, 1·5 mm. long.
Petals yellow, 1·5–2·5 x 0·8–1·2 mm., obovate-spathulate to spathulate, glabrous.
Disk 1·8 mm. in diam. with pilose margin free for 1·5–2 mm.
Sepals 1·5–2 x 1·5–2 mm., triangular.
Flowers sessile, yellowish.
Scales as for the section.
