裸茎老牛筋 luo jing lao niu jin

Herbs perennial. Principal roots many branched, robust. Stems sparsely clustered, 5--20 cm, glabrous, with withered, persistent leaves at base. Leaves crowded; leaf blade linear-subulate or subulate, 8--10 × ca. 1 mm, midvein raised abaxially, margin hairy, apex acute. Cymes 1--3-flowered; bracts ovate or ovate-subulate, ca. 3 × 1.2 mm, margin membranous. Pedicel 1--1.8 cm, glabrous or ± glandular hairy with erect or slightly curved hairs. Sepals 5, orbicular-lanceolate, 3--5 × ca. 2 mm, glabrous or glandular hairy, veins not obvious abaxially, margin membranous, apex acute. Petals 5, white, sometimes pink, obovate or ovate-elliptic, 1.5--2 × as long as sepals, apex obtuse. Floral disc with 5 impressed glands. Ovary ovoid, ca. 3 mm. Styles 3, ca. 3 mm. Capsule globose, 4--6 mm, 3-valved; valves 2-cleft at apex. Seeds brown, reniform, slightly flattened, ca. 1 mm in diam., smooth. Fl. Jun--Jul.

Mountains; 2200--3000 m. Xinjiang [Afghanistan, Kazakhstan].