Herbs perennial. Roots many. Stems tufted, 6-10 cm. Leaves many, verticillate and crowded apically on stem; leaf blade oblanceolate to linear-spatulate, 10-15 × 2.5-3 mm, ca. 1 mm thick, base attenuate-cuneate and spurless, apex subobtuse. Cyme 2- or 3-branched, lax. Flowers pedicellate, unequally 5-merous. Sepals green, narrowly elliptic, 3-4 × ca. 0.9 mm, apex obtuse. Petals lanceolate-boat-shaped, 4-6 × ca. 1.2 mm, margin membranous, apex mucronate. Stamens 10; antepetalous ones ca. 4 mm. Nectar scales obovate. Carpels lanceolate, ca. 3 × 0.6 mm. Seeds narrowly oblong, ca. 0.6 mm × ca. 0.2 mm. Fl. Jun-Jul.

* Talus on steep slopes; 2000-3500 m. C Taiwan.