Description from Flora of China
Herbs (6-)10-20(-60) cm tall, glabrous or sparsely pubescent with trichomes to 0.8 mm. Root fusiform, to 5 mm in diam. Stems several branched from a short base. Cauline leaves petiolate, glabrous or pubescent; petiole (0.1-)0.5-2(-3) cm; leaf blade suborbicular, cordate, or broadly ovate, (4-)7-15 × (1-)5-12(-15) mm, reduced upward, base cordate, margin repand-dentate, repand, or palmately 5-lobed, not mucronate, apex obtuse. Fruiting pedicels slender, ascending or divaricate, straight or recurved, (3-)5-12(-20) mm. Sepals 1.5-2 × 0.8-1.5 mm, glabrous, membranous margin to 0.2 mm wide; median pair oblong, narrower than lateral, not saccate at base; lateral pair broadly ovate, saccate at base. Petals white, narrowly obovate or subelliptic, 4-6 × 2-3 mm, base cuneate, apex rounded. Filaments white, 1.1-2 mm; lateral pair slender; median pair strongly flattened basally, 0.4-0.6 mm wide, with an ovate or oblong lateral tooth 0.2-0.4 × 0.1-0.2 mm; anthers oblong, 0.4-0.6 mm, apex obtuse. Ovules 6-9 per ovary. Fruit narrowly oblong, 4-angled, longitudinally 4-winged, curved, not torulose, (6-)8-15 × 2.5-3 mm, base cuneate; valves glabrous, with a well-developed midvein wing to 0.5 mm wide; replum with a longitudinal wing to 0.5 mm wide; style thick, 0.5-1.5 mm; gynophore to 0.5 mm. Seeds ovate or broadly oblong, flattened, (2.8-)3-3.5 × 1.5-2 mm. Fl. Jun-Aug, fr. Jul-Aug.
* Alpine areas; 4100-4800 m. Sichuan, E Xizang.