Glabrous. Spines small, slender, few. Twigs closely set, slender, distinctly angular-striate, rather densely leafy. Leaves shortly and slenderly petiolate, chartaceous, narrow or sublinear-lanceolate; very much narrowed at the base and acute; apex obtuse or rotundate, with the margin closely serrulate, and with the veins prominent below, reticulate. Inflorescence solitary in the axils of the leaves, a little shorter than the leaves, few-flowered, dichotomous. Fruit a 3-locular capsule, 3-6-seeded. Seeds covered below by the pale yellow aril, uncovered above.