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Washington State Weeds



Hydrilla verticillata

Family Name:


Class: A
Other Names: water-thyme, Florida-elodea
 Why is it a noxious weed? Hydrilla forms dense canopies that often shade out native vegetation. Extensive single species stands provide poor habitat for fish and other wildlife. Once established, it destroys freshwater recreational opportunities by forming extensive surface mats.

More Information:




Visit Washington State Noxious Weed Control Board Here