Oxyria mairei H. Léveillé.

Herbs perennial, somewhat shrubby, dioecious. Rhizomes stout, 0.7-2 cm in diam., ligneous. Stems erect, 30-50 cm tall, somewhat woody at base, branched, striate, densely hirtellous. Petiole 4-9 cm, densely hirtellous; leaf blade orbicular-cordate or reniform, 3-4 × 4-5 cm, subfleshy, abaxially sparsely hirtellous along veins, adaxially glabrous, base broadly cordate, margin undulate, apex obtuse; ocrea tubular, lax, membranous, apex truncate. Inflorescence paniculate, densely branched; bracts brown, membranous, each 5-8-flowered. Pedicel 4-6 mm, slender, articulate below middle. Flowers unisexual. Male flowers: filaments dilated at base. Female flowers: outer tepals deflexed; inner tepals accrescent in fruit, narrowly obovate, appressed. Achenes broadly ovoid, 6-8 mm in diam., margin broadly winged; wings pink, thinly membranous, irregularly denticulate. Fl. Apr-Oct, fr. May-Nov.

* Steep, often dry, mountain slopes, valleys, grasslands; 1600-3800 m. Guizhou, Sichuan, Xizang, Yunnan.