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Japanese knotweed information

giant knotweed information

 

 

Japanese knotweed (Polygonum cuspidatum) & giant knotweed (Polygonum sachalinense)

Yellow = limited distribution; Red = abundant; Gray = not known to be present

updated 4/07


Property of the WeedMapper Team, Dept. of Rangeland Ecology & Management, Oregon State University. Copyright 2004. All rights reserved. Design by STP.