Herbs perennial, 10--18(--20) cm tall. Stems prostrate, base woody; branches erect, glabrous. Leaves linear, 0.5--1.5 cm × 0.3--1 mm, glabrous or glandular pubescent, 3-veined, apex acuminate. Inflorescence cymose. Pedicel 1.5--3 cm, glabrous. Sepals ovate-lanceolate, 3.5--5 mm, adaxially pilose, 3-veined, apex acute. Petals white, oblong-obovate, ca. 7 × 1.5 mm, base attenuate, apex entire, emarginate, or toothed. Stamens 10, shorter than petals; anthers yellow. Styles 3. Capsule ovoid-suboblong, equaling sepals. Seeds reniform, ca. 1 mm, smooth. Fl. May--Jun, fr. Jun--Jul.

Mountain slopes, rocks; 1200--2500(--3400) m. Xinjiang [Afghanistan, Kazakhstan, Russia (W Siberia)].