西南无心菜 xi nan wu xin cai

Arenaria forrestii f. cernua (F. N. Williams) C. Y. Wu; A. forrestii f. micrantha (F. N. Williams) C. Y. Wu; A. forrestii f. roseotincta (W. W. Smith) C. Y. Wu; A. glanduligera F. N. Williams var. cernua F. N. Williams; A. glanduligera var. micrantha F. N. Williams; A. roseotincta W. W. Smith.

Herbs perennial. Stems clustered, 1--15 cm, glabrous or sparsely white villous along 1 side. Proximal cauline leaf blade scalelike, 3--4 × 1--1.5 mm; distal cauline leaf blade orbicular-lanceolate or orbicular-ovate, 5--12 × 1.5--3 mm, leathery, glabrous, midvein raised, base narrowed, margin slightly hard, cartilaginous, apex acute. Flower solitary, terminal. Pedicel 0.5--1.5 cm, villous in a line. Sepals 5, yellow, orbicular-lanceolate, 5--8 × 2--3 mm, base narrowed, margin membranous, apex acute. Petals 5, white or pink, obovate-elliptic, 0.7--1.5 cm × 4--6 mm, base narrowed, cuneate, apex obtuse, sometimes truncate or emarginate. Stamens 10; filaments 5--6 mm; anthers yellow. Ovary ovoid, slightly flattened, ca. 2 mm; ovules 6--8. Styles 3, linear, ca. 2.5 mm. Fl. Jul--Aug.

Mountains, alpine meadows, swamp meadows, shifting screes, broken rocks, limestone crevices; 2900--5300 m. S Gansu, SE Qinghai, W Sichuan, SE Xizang, NW Yunnan [Nepal].