Photo: Fallopia sachalinensis.

Leaf and flowers. Helsinki bot.g., (Kump.), Finland. Planted. 2004-09-17.
Fallopia sachalinensis (F. Schmidt ex Maxim.) Ronse Decr. Engl.: giant knotweed, Sakhalin knotweed. Deu.: Staudenknöterich, Sachalin-Staudenknöterich. Suom.: jättitatar, jättiläistatar. Sven.: jätteslide. Bot. syn.: Reynoutria sachalinensis (F. Schmidt ex Maxim.) Nakai, Polygonum sachalinense F. Schmidt ex Maxim.
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Photo: Fallopia sachalinensis.