Herbs annual. Stems branched from base, ascending, 2.5-4.5 cm. Leaf blade linear-lanceolate, 4.7-8 mm, base obtusely spurred, apex acute. Cyme corymbiform, very lax, few flowered. Flowers unequally 5-merous. Sepals lanceolate to subobovate, 3-5 mm, base spurred, apex acuminate. Petals ± free, yellow, suboblong, ca. 4 mm, apex shortly acuminate. Stamens 10; antesepalous ones ca. 2.8 mm; antepetalous ones ca. 1.5 mm, inserted 0.8-1 mm from petal base. Nectar scales suborbicular-spatulate, ca. 0.5 mm, apex rounded to retuse. Carpels erect, base connate for 0.8-0.9 mm, apex abruptly tapered. Follicles broadly ovoid, 3-3.5 mm, 3-8-seeded; placenta falcate. Seeds ovoid, 0.8-1 mm, minutely mammillate. Fl. Aug, fr. Sep.

* Meadows near river beaches, swampy places by beaches in valleys, lake banks, rocks on alpine slopes, steppes, granite crevices; 3300-4800 m. S Qinghai, W Sichuan, E Xizang.