Herbs 5-25 cm tall, glabrous or sparsely pubescent with trichomes to 1 mm. Root fusiform, fleshy, to 2 mm in diam. Stem single from fleshy root then few to several branched, branches slender, ascending or decumbent. Cauline leaves petiolate, glabrous or sparsely pubescent; petiole 0.5-2.5(-4) cm; leaf blade suborbicular, cordate, or subreniform, 4-12 × 5-15 mm, reduced in size upward, base cordate, margin repand or shallowly and obtusely 5-lobed, the lobes not mucronate, apex obtuse. Fruiting pedicels slender, ascending or divaricate, straight, 5-15 mm. Sepals 1-1.5 × 0.6-1 mm, glabrous, membranous margin to 0.1 mm wide. Petals white, narrowly subelliptic to narrowly oblong, 3-4 × 1-1.5 mm, base cuneate, apex rounded. Filaments white, 1.1-1.5 mm; lateral pair slender; median pairs strongly flattened basally and 0.3-0.5 mm wide, with an ovate or oblong lateral tooth to 0.2 × 0.1 mm; anthers oblong, 0.3-0.4 mm, apex obtuse. Ovules 3-6 per ovary. Fruit linear, terete, wingless, torulose, 6-15 × ca. 1.5 mm, base cuneate; valves sparsely and minutely puberulent, obscurely veined, wingless; replum wingless; style thick, 0.5-1.5 mm; gynophore to 1 mm. Seeds oblong, flattened, 2-2.5 × ca. 1.5 mm. Fl. Jun-Aug, fr. Jul-Aug.

* Wet ground by rivers, ravine slopes in Juniperus forests, woods; 4000-4500 m. Sichuan, E Xizang.