Leaves opposite; blades large, 5.5–56 × 3–26 cm, elliptic to obovate-elliptic, gibbous at the base on either side of the midrib to form 2 cavities 1–3 mm deep for ants, obtuse or less often shortly acuminate at the apex, cuneate to subcordate at the base, glabrous above, ± puberulous on the lower surface, olive-brown on drying, shiny; domatia absent; petiole 2–6 mm long; stipules c. 10 mm long, tubular, the margin incised-dentate.
Corolla white, turning brown, or tube pinkish or brownish-red outside, pinkish-white inside and lobes white and pink, often pink-spotted, flecked crimson outside, the pink parts being those not exposed in bud, subscabrous or glandular papillate outside; tube (7)8–24 cm long, 3–5(7.5) cm wide at the throat; lobes 5, 3.5–6 × 2.2–4 cm, broadly ovate or oblong-falcate, puberulous or papillate on the exposed parts.
Shrub or small tree (1.2) 3–12(15) m tall, with several trunks or with a simple bole up to 20(45) cm wide and often with horizontal annular rings; branchlets stout, spreading, grey; young parts of stem and young leaves viscid and puberulous to glabrescent; gum exudate yellow; slash variable, often green with cream-coloured or orange edges.
Fruit red-brown, orange within, 5–7.2 cm long and 3–5 cm in diameter, globose or broadly ellipsoid, or sometimes ± quadrangular in section, the wall 2–3 mm thick, the endocarp forming 2–3 pale ± shiny ± hemispherical pieces, crowned by the persistent calyx limb.
Calyx sticky; tube 10–15 mm long, oblong-ellipsoid; limb-tube 10–20 mm long, ribbed, the ribs reaching the apices of 5(?8) narrowly triangular lobes which are 5–10 mm long and have thin margins.
Style glabrous, gradually thickened into a yellow club-shaped pollen presenter split into 2 lobes for about 2–2.5 cm.
Seeds very numerous, yellow-brown, 3–5 × 3 mm, compressed ellipsoid, finely shagreened and wrinkled.
Flower buds dark purple-red; flowers 1–3, erect or ± pendent, sessile.
A tree, to 60 ft. high, with stout branchlets
Viscid on the younger parts
Anthers 2.5–4 cm long.
Large shining leaves
Flowers white