Photo: Fallopia japonica 3.

Closeup of flowering branch. Helsinki, Finland. Planted. 2000-10-09.
Fallopia japonica (Houtt.) Ronse Decr. Engl.: Japanese knotweed, Mexican-bamboo. Deu.: Japan-Staudenknöterich. Suom.: japanintatar. Sven.: parkslide, rosenslide. Jap.: itadori. TCM: huzhang. Bot. syn.: Pleuropterus cuspidatus (Sieb. & Zucc.) Moldenke, Pleuropterus zuccarinii (Small) Small, Polygonum compactum Hook. f., Polygonum cuspidatum Sieb. & Zucc., Reynoutria japonica Houtt.
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Photo: Fallopia japonica 3.