Herbs perennial. Stems branched at base, slender, 2--10 cm. Leaf blade greenish, elliptic, 0.7--1.5 cm × 2--5 mm, leathery, midvein and lateral veins raised and green, base cuneate, margin glabrous, apex obtuse. Cymes compound, corymbose, 3-flowered. Sepals 5, violet, ovate, 5--6 mm, leathery, glabrous abaxially, 3-veined, base broadened, margin ciliate, apex cymbiform. Petals 5, white, broadly obovate or suborbicular, 7--9 mm, apex entire. Stamens 10; filaments 3--5 mm, those opposite sepals with a gland at base; anthers yellow. Ovary obovoid, ca. 2.5 × 1.5 mm. Styles 2, ca. 2 mm, clavate. Fl. Jun--Jul.

* Riverside grasslands; 4600--5300 m. NE Xizang.