Ampelygonum chinense (Linnaeus) Lindley; Persicaria chinensis (Linnaeus) H. Gross; P. chinensis var. siamensis H. Léveillé; Polygonum adenopodum Samuelsson; P. brachiatum Poiret; P. sinense J. F. Gmelin.

Stems and branches usually glabrous. Leaf blade ovate or narrowly ovate, 4-10 × 2-4 cm. Fl. Jul-Sep, fr. Aug-Oct.

Wet valleys, grassy slopes; sea level to 2400 m. Anhui, Fujian, S Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Hunan, Jiangsu, Jiangxi, S Shaanxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [Bhutan, India, Indonesia, Japan, Malaysia, Myanmar, Nepal, Philippines, Sikkim, Thailand, Vietnam].