It is a shrub or small tree, 2-3m tall, glabrous. Branches and branchlets are 4-angled, becoming terete with age, often terminating as indurate spines. Petiole is 2-10mm; leaf blade adaxially shiny, lanceolate, elliptic-oblanceolate, or oblong, 2-9×1-2cm, base attenuate, apex obtuse or mucronate. Floral tube is red-orange or pale yellow, campanulate-urceolate, 2-3×1-1.5cm; sepals are 5-9, erect, deltate. Petals are 5-9, bright red-orange [or white], obovate, 1.5-3×1-2cm, apex rounded or obtuse. Stamens are numerous, included to exserted. Ovary is 8-13-loculed, in 2 or 3 superposed layers, lower locules with axile placentation, upper ones with apparent parietal placentation. Fruit is globose, leathery berries, variable in colour, red to yellow-green or red-brown, 5-12cm in diameter, crowned by persistent sepals, irregularly dehiscent. Seeds are obpyramidal within juicy sarcotestal layer, ruby-red, pink, or yellowish white.