萹蓄(原变种) bian xu (yuan bian zhong)

Polygonum aviculare var. heterophyllum Munshi & Javeid; P. aviculare var. vegetum Ledebour; P. heterophyllum Lindman, nom. illeg. superfl.; P. monspeliense Thiebaut ex Persoon.

Ocrea: lower part brown, upper part white.

Near fields, roadsides, waste places; sea level to 4200 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 [widely distributed in N temperate zone; widely naturalized in S temperate zone].

This variety is used medicinally.