Bohemian Knotweed

Polygonum x bohemica
Family Name:

Polygonaceae
Class: B
Other Names:  
 Why is it a noxious weed? It forms dense colonies that exclude native vegetation and greatly alter natural ecosystems. Established populations are extremely persistent and colonies are extremely difficult to eradicate. It poses a significant threat to riparian areas.

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 Visit Washington State Noxious Weed Control Board Here