]> A barcode-00238545 China Sichuan Dujiangyan Municipality (formerly Guan Xian); Qinglongzui near the side of Longwangmiao, along the Longxi River. Salix thickets and open areas immediately adjacent to the river. Wiry herbs in water. Polygonum thunbergii Siebold & Zuccarini Siebold & Zuccarini 2010-08-16 16:37:32 D. E. Boufford, B. Bartholomew, G. Li & G. H. Zhu