Herbs annual, glabrous. Stems simple or branched from base, erect, 4.5-5.5 cm. Leaf blade linear-oblong to oblong, 4-5 mm, base truncate and shortly spurred, apex obtuse. Cyme more than 10-flowered. Flowers unequally 5-merous; pedicel 1-4 mm. Sepals oblong, 2-3 mm, base shortly spurred, apex obtuse. Petals yellow, narrowly oblanceolate, 4.5-5 mm, apex subobtuse and mucronate. Stamens 10; antepetalous ones equaling petals, inserted ca. 1 mm from petal base. Nectar scales broadly linear-spatulate, ca. 0.7 × 0.8 mm, apex parted to lobate. Carpels basally connate for ca. 1 mm. Follicles divergent, broad, 3-4 mm, 2-4-seeded; placenta falcate. Seeds densely mammillate, basally narrowly winged. Fl. Aug.

* Gravelly places in alpine zone; 3700-4000 m. S Gansu.