State Government
Polygonum genus - EncycloWeedia
California Department of Food and Agriculture.
Identification/Description; Photographs; Habitat; Distribution; Dispersion; Controls
Japanese Knotweed - Invasive Plant Species Fact Sheet (PDF | 734 KB)
Indiana Department of Natural Resources. Invasive Plant Species Assessment Working Group.
Identification/Description; Photographs; Introduction History; Habitat; Distribution; Controls
Japanese Knotweed - Invasive Plants of Ohio
Ohio Department of Natural Resources. Natural Areas and Preserves.
Identification/Description; Photographs; Introduction History; Impacts; Habitat; Distribution; Controls
Japanese Knotweed - Vermont Invasive Exotic Plant Fact Sheet (PDF | 94 KB)
Vermont Agency of Natural Resources. Environmental Conservation.
Identification/Description; Illustrations; Introduction History; Impacts; Distribution; Controls
Japanese Knotweed - Invasive Alien Plant Species of Virginia (PDF | 99 KB)
Virginia Department of Conservation and Recreation. Natural Heritage Program; Virginia Native Plant Society.
Identification/Description; Illustrations; Introduction History; Impacts; Habitat; Distribution; Control
Japanese Knotweed
State of Washington. King County Department of Natural Resources. Water and Land Resources Division.
Identification/Description; Photographs; Introduction History
Japanese Knotweed - Non-Native Freshwater Plants
Washington State Department of Ecology. Water Quality Program.
Identification/Description; Photographs; Introduction History; Impacts; Habitat; Distribution
Japanese Knotweed
Washington State Noxious Weed Control Board.
Identification/Description; Photographs; Introduction History; Life Cycle; Habitat; Distribution; Controls; Special Note: References
Japanese Knotweed - Wisconsin Botanical Information System
Wisconsin State Herbarium; University of Wisconsin-Madison.
Taxonomy; Photographs; Habitat; Distribution |