Herbs small. Roots gray, conic. Stems densely dichotomously branched at base, 3--6 cm; branchlets violet, subglabrous. Leaf blade subulate, 4--5 × ca. 1 mm, base broadened into a sheath, apex acute. Cymes several flowered; bracts similar to leaves but smaller. Pedicel 3--10 mm, stiff. Sepals 5, lanceolate, ca. 2 × 1 mm, base broadened, margin ciliate, apex obtuse. Petals 5, white, narrowly lanceolate, shorter than sepals, apex obtuse. Stamens 10, equaling petals. Ovary ovoid. Styles 3, equaling ovary. Capsule ovoid, longer than sepals, 3-valved; valves 2-cleft at apex. Fl. and fr. Jul--Aug.

* Mountain rock crevices; ca. 4000 m. SW Sichuan.