Arenaria lancangensis L. H. Zhou

Herbs perennial. Stems caespitose, pulvinate, 4--11 cm, with crowded, withered, persistent leaves at woody base. Leaf blade subulate, 6--8 × ca. 1 mm, base broadened, clasping, apex acute. Flower solitary, terminal; bracts ovate, ca. 2 × 1 mm. Pedicel slightly curved, ca. 4 mm, glabrous. Sepals 5, elliptic, ca. 3 × 1.2 mm, 3-veined, apex obtuse or acute. Petals 5, white, elliptic, 3--3.5 × ca. 1.2 mm, with a yellow, oblong callus at base. Stamens 10; filaments less than 1 mm, those opposite sepals with a gland at base; anthers white. Ovary oblate, ca. 2 mm in diam., smooth; ovules 5 or 6. Styles 3. Capsule globose, ca. 3 mm, 3-valved; valves 2-cleft at apex. Seeds 1--3, gray, triangular-oblate, less than 1 mm in diam., glabrous. Fl. and fr. Jun--Sep.

SE Qinghai, W Sichuan, SE Xizang, SW Yunnan.

* Alpine meadows, gravelly areas; 3500--4800 m.