Arenaria monticola Edgeworth in J. D. Hooker, Fl. Brit. India 1: 238. 1874, not Buckley (1862).

Herbs perennial. Roots robust, woody. Stems pulvinate, densely branched, 4--8 cm, glabrous. Leaves crowded; leaf blade subulate-linear, 0.8--2 cm, with 1 raised vein, base broadened, margin sheathing, incrassate, membranous, hairy, apex cuspidate. Flower solitary, terminal, sessile, ca. 1.8 cm in diam. Sepals 5, lanceolate or ovate-lanceolate, 7--8 × ca. 2 mm, closely 3-veined, base broadened, margin broadly membranous, apex acute. Petals 5, white, broadly ovate, 0.9--1.2 cm, base clawed, apex obtuse. Stamens 10; filaments shorter than sepals, those opposite sepals with a gland at base. Ovary ovoid. Styles 3, linear. Capsule ovoid, shorter than persistent sepals, 3-valved; valves 2-cleft at apex. Seeds obovoid-reniform. Fl. Jun--Jul, fr. Jul--Aug.

Alpine meadows, grasslands, river beaches; 4200--5100 m. Xizang [Bhutan, Nepal, Sikkim].