Herbs perennial. Principal roots robust, woody. Stems pulvinate, 3--8 cm, glandular hairy. Basal leaves congested; leaf blade spinose-linear, 1--1.5 cm × ca. 1 mm, veins 3, raised, base broadened, clasping, membranous, apex acute, pillar-shaped. Cauline leaves in 1 or 2 pairs; leaf blade subulate, 5--10 × ca. 0.5 mm, 3-veined, base broadened, clasping, membranous, apex erect or curved, acute. Flowers solitary, rarely paired, terminal; bracts ovate-lanceolate, ca. 4 × 1 mm, margin broadly membranous, apex acuminate. Pedicel 1--2 cm, densely glandular villous. Sepals 5, ovate-lanceolate, 6--7 × ca. 1.5 mm, glandular hairy abaxially, 1--3-veined, base broadened, margin narrowly membranous, apex acute. Petals 5, white, ovate, equaling sepals, apex obtuse. Stamens 10, shorter than petals; anthers yellow. Ovary ovoid. Styles 3, linear. Fl. Jun--Jul.