Arenaria yunnanensis Franchet var. trichophora (Franchet) F. N. Williams.

Herbs perennial. Roots conic or spinose. Stems clustered, simple or branched at base, prostrate or erect, 10--30 cm, long hard hispid and glandular pubescent. Proximal cauline leaves sessile; middle and distal cauline leaves shortly petiolate; leaf blade green abaxially, ovate or orbicular-elliptic, 0.8--2 cm × 3--10 mm, thick, midvein raised, base narrowed, apex obtuse. Cymes few to many flowered; bracts leaflike, very small. Pedicel 0.8--2 cm, densely stiffly hairy and glandular pubescent, hairs erect or recurved. Sepals 5, lanceolate, 5--6 mm, glandular pubescent abaxially, base broadened, margin white membranous, apex acute. Petals 5, white, obovate, ca. 2 × as long as sepals, apex fimbriate. Stamens 10; anthers black or yellow-brown, globose. Ovary ovoid; ovules numerous. Styles 2. Fl. Jul--Sep.

* Alpine scrub, grasslands, shifting screes, sands; 2500--4700 m. SW Sichuan, SE Xizang, N Yunnan.