Rounded annual or short-lived perennial c. 15 cm high, glabrous except slight axillary pubescence. Leaves slender, semiterete, 5–15 mm long, fleshy. Flowers solitary. Perianth glabrous except ciliate margin to lobes. Stamens 5. Fruiting perianth erect, narrowly cuneate, constricted at the solid base, dorsiventrally compressed; base 1 mm long, with very oblique attachment, slightly hollowed; tube 2 mm long, multi-ribbed; spines 2+2, slender, spreading (or the longer adaxial down-curved), a lateral spine and a sub-abaxial spine c. 5 mm long, the two radicular spines adaxial, 1 c. 3 mm long and the other c.1 mm long; limb incurved. Seed and radicle erect.
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