Stellaria biflora Linnaeus, Sp. Pl. 1: 422. 1753; Alsine biflora (Linnaeus) Wahlenberg.

Herbs perennial, 3--7 cm tall. Stems caespitose, erect, slender. Leaves linear, 6--10 × 0.5--1 mm, glabrous except for a few short cilia at base, apex acute. Flowers 1--3, terminal; pedicel 2--12 mm. Sepals ovate-oblong, 2.5--3.5 mm, 3-veined, apex obtuse. Petals white, oblong, subequaling sepals. Stamens 10; anthers yellow. Capsule yellow-green, ovoid, ca. 4 × 2.5 mm, slightly longer than sepals. Seeds reniform, 0.7--0.8 mm, smooth or rugose. Fl. Jun--Aug, fr. Aug--Sep.

Mountains; ca. 3600 m. Xinjiang (Bogda Shan) [Afghanistan, Kazakhstan, N Mongolia, Pakistan, Russia (Far East, Siberia); Europe, North America].