Parrotfeather Myriophyllum aquaticum This Class B noxious weed has a limited distribution in Washington State. Control is required in King County. For more information about parrotfeather, please follow this link to the WA State Department of Ecology. If you find parrotfeather in King County, please notify us through our online infestation form. To find out where we have records of this weed in King County, use our interactive noxious weed map and search for parrotfeather.
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