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Washington State Weeds

Bohemian Knotweed

Polygonum x bohemica

Family Name:


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.

More Information:




Visit Washington State Noxious Weed Control Board Here