Herbs small, glandular pubescent. Roots numerous, conic, slender. Stems erect, densely dichotomously branched at base, proximally yellowish and lustrous, distally green or violet, 2--4 cm, glandular villous. Petiole short; leaf blade saccate, 4--10 × 1--3.5 mm, leathery, both surfaces sparsely glandular villous, base attenuate, margin densely ciliate, apex obtuse. Cymes 3--5-flowered, rarely flower solitary. Pedicel green or brown, 2--7 mm, densely glandular villous. Sepals 5, ovate, 2--3 × ca. 1 mm, leathery, glandular villous abaxially, 1-veined, base broadened, margin narrowly membranous, apex obtuse. Petals 5, white, broadly obovate, 1.5--2 × as long as sepals, apex emarginate or 2-cleft. Stamens 10, longer than sepals; anthers black. Ovary ovoid, ca. 1.3 mm. Styles 2, linear, ca. 1 mm. Fl. Jul.

* River beaches; 4800--5000 m. E Xizang (Amdo Xian).