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COUNTY MAPS

Baker

Benton

Clackamas

Clatsop

Columbia

Coos

Curry

Douglas

Josephine

Lane

Lincoln

Linn

Marion

Morrow

Multnomah

Polk

Tillamook

Union

Wallowa

Washington

Yamhill

 

Japanese knotweed information

giant knotweed information

 

 

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

Columbia County, Oregon

updated 3/08

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