Russian Knapweed Acroptilon repens This Class B noxious weed has a limited distribution in Washington and control is required in King County. For more information about Russian knapweed, please see the written findings of the WA State Noxious Weed Control Board. The Selected Knapweeds of Washington is a an informative color brochure describing knapweeds. (316 KB Acrobat file, 46 seconds on 56K modem).
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