Mark Hyde, Bart Wursten and Petra Ballings   cc-by-nc

Polygonum (Knotweed) is a genus of shrub in the family Polygonaceae. They are climbers. They are native to Puerto Rico, The Contiguous United States, Saint-Pierre Et Miquelon, Greenland, Alaska, North America, Canada, and Pacific Basin excluding Hawaii. Flowers are visited by Burnsius communis. Individuals can grow to 6.6 m.

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EOL has data for 17 attributes, including:

Known occurrences, collected specimens and observations of knotweed. View this species on GBIF