Shrub or small tree up to 8 m tall, spinescent, glabrous. Brachyblasts present. Branches angular and green when young, becoming terete and grey with age. Spines slender, up to 70 mm long. Leaves fasciculate or alternate towards lips of branchlets, glabrous, subcoriaceous. dark, green, petiolate; lamina elliptic or ovate, 20-27 x 14-18 mm, apex acute, rounded to emarginate, base cuneate or rounded, margin serrate to crenate, venation prominent below when dry, midrib prominently raised on both sides; petiole 2-3 mm long; stipules subulate. ± 2 mm long, apex filiform, margin fimbriate, marcescent. Inflorescence a dichasium, shorter than leaves; peduncles 4-6 mm long; pedicels 2-3 mm long. Flowers unisexual. 3-9 per cyme. Sepals 5, broadly triangular, 0.8 mm long, margin ciliolate. Petals 5, white or cream, oblong, 1.0-1.5 mm long, margin uneven. Male flowers: stamens 5, slightly shorter than petals; filaments 1.5-2.5 mm long, slender, arising below margin of disc; pistillode small, ridged, with short capitate style. Disc 1.5 mm in diameter, narrow, wavy, 10-lobed. Female flowers: staminodes 5, shorter than stamens in male flowers; style 1 mm long, stigma 3-branched, spreading; ovary 3-locular, sulcate; ovules 2 per locule. Capsules 3-valved, 5-6 mm long, smooth, subglobose, prominently sulcate, with 6-12 ridges, thickly coriaceous, glabrous, yellow or pink. Seeds golden brown, 4 mm long; aril yellow, partially covering the seed.
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Shrub or tree, up to 8 m high, with slender thorns. Branchlets angular, becoming terete. Leaves fascicled or alternate, shortly petiolate, subcoriaceous, dark green; lamina elliptic or ovate, 20-27 x 14-18 mm, apex acute, rounded to emarginate, base cuneate or rounded, margins serrate; midrib prominently raised on both sides. Inflorescences few-flowered; peduncles 4-6 mm long. Flowers whitish; pedicels 2-3 mm long. Sepals triangular, ± 0.8 mm long, margins ciliolate. Petals oblong, ± 1.5 mm long, margins uneven. Male flowers: stamens slightly shorter than petals. Female flowers: staminodes shorter than stamens in male flowers; ovary 3-locular; stigma 3-branched. Fruit a 3-valved, subglobose capsule, 5-6 mm long, yellow or pink, smooth, prominently sulcate, with 6-12 slightly imbricate ridges, thickly leathery. Seeds partially enveloped by yellow aril.