Leaves opposite; lamina 5–15(26) x 3–10(16) cm., elliptic or oblong-elliptic or oblong or ovate-elliptic or ovate-oblong, densely tomentose when young (except in subsp. glabrum), eventually pubescent to pilose or tomentose on the reticulation beneath and glabrous on the areolae (subsp. psidioides) or tomentose both on the reticulation and on the areolae (subsp. dinteri) or glabrous (subsp. glabrum) apart from scales, rather inconspicuously lepidote, apex usually rounded or retuse, often mucronate or apiculate, base rounded or subcordate; lateral nerves 8–16 pairs; reticulation rather prominent beneath; petiole 3–10 mm. long.
Semideciduous understorey tree up to 9 m. high or large bush; crown open, flattened to rounded; bark grey to black, deeply fissured or fairly smooth; branchlets usually tomentose when young with the bark peeling off in large strips or cylindrical or hemicylindrical pieces leaving a newly-exposed cinnamon-red surface.
Scales glistening, whitish or yellowish or reddish, often obscured by the indumentum, c. 40–50(70)µ in diam., circular, with 8 primary radial walls only, cell-walls very thin and obscured by glutinous secretions; cuticular membrane greatly raised from the cell-plate forming a ± spherical cavity.
Fruit usually crimson or pink, sometimes red-brown or tan, up to 3x3 cm., glutinous, subcircular or elliptic in outline, nearly glabrous except for rather inconspicuous scales, apical peg absent, wings up to 13 mm. broad, flexible and rather tenuous, stipe up to 10 mm. long.
An evergreen shrub. It can grow up to 17 m high. The bark is grey, rough and corky and flakes off. The leaf blades are hairy. The leaves are opposite. The flowers are greenish-yellow. The fruit are 2-3 cm long and wide. They have 4 wings.
Inflorescences of rather dense usually tomentose axillary spikes up to 10 cm. long, usually appearing with the young leaves; rhachis usually tomentose; bracts 1–2 mm. long, subulate, caducous.
Lower receptacle 1·2–1·3 mm. long, usually tomentose; upper receptacle 2·5 x 3·5 mm., broadly campanulate or cupuliform, usually tomentose.
Cotyledons 2, 2–2·5 x 3–4 cm., transversely elliptic, arising below soil level; petioles 4–4·5 cm. long.
Petals 1·1 x 0·6 mm., obcuneate, ciliate at the apex (except in subsp. glabrum).
Disk 2 mm. in diam. with a very short free pilose margin.
Style 6·5 mm. long, slightly expanded at the apex.
Stamen-filaments 6 mm. long; anthers 1·1 mm. long.
Sepals 1 x 1·5 mm., deltate.
Flowers sessile, yellow.