马蓼(原变种) ma liao (yuan bian zhong)

Persicaria lapathifolia (Linnaeus) S. F. Gray; P. nodosa (Persoon) Opiz; P. vaniotiana H. Léveillé; Polygonum komarovii H. Léveillé; P. lapathifolium subsp. nodosum (Persoon) Weinmann; P. lapathifolium var. xanthophyllum H. W. Kung; P. nodosum Persoon; P. pyramidale H. Léveillé; P. vaniotianum (H. Léveillé) H. Léveillé.

Plants glabrous or subglabrous. 2n = 22, 24.

Roadsides, along ditches; sea level to 3900 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Xizang, Yunnan, Zhejiang [Bangladesh, India, Indonesia, Japan, Kazakhstan, Korea, Kyrgyzstan, Mongolia, Myanmar, Nepal, New Guinea, Pakistan, Philippines, Tajikistan, Thailand, Turkmenistan, Uzbekistan, Vietnam; N Africa, Australia, Europe, North America].