Herbs perennial. Stems densely pulvinate, 10--15 cm, sparsely villous; mature branches woody, with crowded, withered, persistent leaves. Basal leaf blade linear or subulate-linear, 0.6--1.5 cm × 1--2 mm, 3-veined, midvein raised, base broadened, sheathing, margin involute, denticulate, apex acute, spinose. Cauline leaves in 2 or 3 pairs; leaf blade linear-lanceolate or ovate, 3--8 × 1--2 mm, shortly villous, base broadened, sheathing, margin involute, yellow, ciliate, apex hard. Flower solitary, terminal. Pedicel 1--2 cm, shortly villous. Sepals 5, ovate or lanceolate-ovate, 6--10 × 3--4 mm, sparsely white hairy abaxially, inconspicuously 3-veined, base broadened, margin membranous, apex obtuse. Petals 5, white or yellowish, obovate, 1.2--1.5 cm × 4--6 mm, apex obtuse. Stamens 10; filaments equaling sepals, those opposite sepals with a gland at base. Ovary ovoid. Styles 3, linear. Fl. Jul.
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