Glabrous perennial with fleshy tap root; stems erect, terete, wiry, rarely branched. Leaves sparse along stems except at base and near apex where often clustered, linear or linear-lanceolate, 3–26 mm long (basal leaves up to 40 mm long), 1–4 mm wide, glaucous. Flowers solitary, terminal; pedicels up to 8 mm long. Perianth segments equal in length, free almost to base, white inside. Stamens many, evenly distributed; filaments terete, hirsute at base, papillose above. Capsule with bifid valves. Seeds club-shaped, tuberculate, dark brown.
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