]> A barcode-00238544 China Sichuan Dujiangyan Municipality (formerly Guan Xian); between Guanmengzi and Guihuashu, upstream from Longxi along the Longxi River and on adjacent slopes. Polygonum thunbergii Siebold & Zuccarini Siebold & Zuccarini 2010-08-16 16:37:31 D. E. Boufford, B. Bartholomew, G. Li & G. H. Zhu