Arenaria trichophora Franchet var. angustifolia Franchet, Bull. Soc. Bot. France 33: 431. 1886, not A. angustifolia McNeill (1961).

Herbs perennial. Roots conic or spinose. Stems branched at base, procumbent or erect, 10--20 cm, glandular pubescent. Leaf blade usually broadly lanceolate, 1--2 cm × 2--4 mm, base attenuate, apex acute. Cymes few to many flowered; bracts leaflike, small. Pedicel 0.5--1.5 cm, densely glandular hairy. Sepals 5, lanceolate, 5--6 mm, glandular hairy abaxially, base broadened, margin white membranous, apex acute. Petals 5, white, obovate, ca. 2 × as long as sepals, apex fimbriate. Stamens 10; anthers violet or black. Ovary ovoid; ovules numerous. Styles 2. Capsule shorter than persistent sepals, 2-valved; valves 2-cleft at apex. Seeds flat, narrowly winged. Fl. and fr. Jul--Oct.

* Alpine meadows; 4000--4500 m. NW Yunnan.