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Polygonum (Knotweed) is a genus of plants in the family Polygonaceae. They are native to North America. Flowers are visited by Bibio pallipes, Lasioglossum hemicyaneum, Nomia candida, and Lasioglossum emirnense. Individuals can grow to 6.6 m.

EOL has data for 15 attributes, including:

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