Bushy intricately-branched annual or perennial, glabrous. Leaves slender, subterete or very narrowly fusiform, obtuse, mostly 5–10 mm long, rarely to 15 mm long. Flowers solitary, glabrous. Stamens 4. Fruiting perianth hard, glabrous; attachment circular; base truncate, horizontal; tube shortly cylindrical, c. 1.5 mm high, 2 mm wide; apex convex. Spines 3+2, horizontally spreading; radicular pair on a short lateral spur 2–3 mm long, other three principal spines either opposite to or at right angles to radicular pair, 5–7 mm long. Seed horizontal; radicle ascending.
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