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Other Names: Rhizoma Polygoni Cuspidati, Bushy Knotweed Rhizome, Giant Knotweed, Japanese Knotweed Root, Polygoni Cuspidatum, Bambou Japonais, Bambou Mexicain, Extrait de Hu Zhang, Fallopia japonica, Fleece Flower, Giant Knotweed, He Shou Wu, Hu Zhang Extract, Hu Zhang Root, Itadori, Japanese Bamboo, Japanese Knotweed, Japanese Knotwood, Mexican Bamboo, PCWE, Persicaire Cuspidée, Polygoni Multiflora, Polygonum cuspidatum, Racine de Hu Zhang, Renouée à Feuilles Pointues, Renouée du Japon, Renouée Japonaise, Reynoutria japonica, Tiger Cane.<br>Hu zhang is the Chinese name given to a plant with the scientific name of Polygonum cuspidatum. North American varieties are often referred to as “Mexican bamboo.” The root is used as medicine.