Random invasive species images that represents what NISIC does
USDA.gov NAL NISIC Sudden oak death Formosan subterranean termite Yellow star thistle Giant African snail Cactus moth Purple loosestrife
HomeAbout National Invasive Species Information Center (NISIC)News and EventscouncilHelpContact Us
 Search the National Invasive Species Information Center
   
Search all USDA
Advanced Search
Search Tips
Browse by Geography
United States
International
Browse by Subject
Aquatic Species
Plants
Animals
Microbes
Economic Impacts
Laws and Regulations
Manager's Tool Kit
Resource Library
 
You are here: Home / Plants / Species Profiles / Japanese Knotweed
Plants
  
Species Profiles

Japanese Knotweed

Japanese Knotweed

Scientific name: Fallopia japonica (Houtt.) Ronse Decr. (ITIS)

Synonym: Polygonum cuspidatum Siebold & Zucc.; Reynoutria japonica Houtt.

Common names: Japanese knotweed, fleeceflower, Mexican bamboo, huzhang

Click image to enlarge

Selected Resources

Native To: Asia (Stone 2010)

Date of U.S. Introduction: Late 1800s (Stone 2010)

Means of Introduction: Introduced as an ornamental (Stone 2010)

Impact: Crowds out native species (Stone 2010)

Current U.S. Distribution:

  • Invasive Species Maps
    USDA. FS. Northern Research Station.
    Maps are organized for 43 invasive plant species into five categories: trees, shrubs, vines, herbs, and grasses. Select the desired species to view the distribution information for northern states.
  • Early Detection & Distribution Mapping System (EDDMapS) - Japanese Knotweed
    University of Georgia. Center for Invasive Species and Ecosystem Health.
    Provides state, county, point and GIS data. Maps can be downloaded and shared.

Images:

Videos:

Selected Resources:

Back to Top

Council

Southeast Exotic Pest Plant Council Invasive Plant Manual - Japanese Knotweed
Southeast Exotic Pest Plant Council.

Fact Sheet: Japanese Knotweed (Jan 2014; PDF | 874 KB)
Alberta Invasive Plants Council (Canada).

Partnership

Invasive Plant Atlas of New England (IPANE) - Japanese knotweed, Mexican bamboo
University of Georgia. Center for Invasive Species and Ecosystem Health.

Invasive Plant Atlas of the United States - Japanese Knotweed
University of Georgia. Center for Invasive Species and Ecosystem Health.

Invasive Species Compendium - Fallopia japonica
CAB International.

Japanese Knotweed Alliance
CABI Bioscience.

Delivering Alien Invasive Species Inventories for Europe (DAISIE): Species Factsheet - Fallopia japonica
European Commission. Sixth Framework Programme.

Japanese Knotweed
Great Britain Non-Native Species Secretariat.

Invasive Alien Species Fact Sheet: Fallopia japonica (PDF | 700 KB)
North European and Baltic Network on Invasive Alien Species.

Global Invasive Species Database - Fallopia japonica (herb, shrub)
World Conservation Union. Invasive Species Specialist Group.

Government

Germplasm Resources Information Network (GRIN) - Reynoutria japonica
USDA. ARS. National Genetic Resources Program.

Polygonum sachalinense, P. cuspidatum, P. bohemicum - Fire Effects Information System (FEIS)
USDA. FS. Rocky Mountain Research Station. Fire Sciences Laboratory.

Managing Japanese Knotweed (2007; PDF | 923 KB)
USDA. NRCS. Conservation Reserve Enhancement Program; Pennsylvania State University.

PLANTS Database - Japanese Knotweed
USDA. NRCS. National Plant Data Center.

Japanese Knotweed
Cornwall County Council (United Kingdom).

State

Polygonum genus - EncycloWeedia
California Department of Food and Agriculture.

Japanese Knotweed - Invasive Plant Species Fact Sheet (PDF | 734 KB)
Indiana Department of Natural Resources. Invasive Plant Species Assessment Working Group.

Invasive Species Best Control Practices - Japanese Knotweed (2012; PDF | 2.30 MB)
Michigan Department of Natural Resources. Michigan Natural Features Inventory.

Japanese Knotweed (2011; PDF | 556 KB)
Missouri Department of Conservation.

Invasive Plants in Pennsylvania: Japanese Knotweed aqnd Giant Knotweed (PDF | 162 KB)
Pennsylvania Department of Conservation and Natural Resources.

Japanese Knotweed - Vermont Invasive Exotic Plant Fact Sheet (PDF | 94 KB)
Vermont Agency of Natural Resources. Environmental Conservation.

Japanese Knotweed - Non-Native Freshwater Plants
Washington State Department of Ecology. Water Quality Program.

Class B Noxious Weed: Japanese Knotweed
Washington State Noxious Weed Control Board.

Japanese Knotweed
King County (Washington). Noxious Weed Control Program.

Japanese Knotweed (Polygonum cuspidatum)
Wisconsin Department of Natural Resources.

Academic

Japanese knotweed and other knotweeds - Invasive Plant Species of Alaska (PDF | 304 KB)
University of Alaska - Anchorage. Alaska Natural Heritage Program.

Japanese Knotweed (Polygonum cuspidatum) (2007; PDF | 117 KB)
Purdue University (Indiana). Extension.

Japanese Knotweed / Mexican Bamboo - Maine Invasive Plants Bulletin no. 2511
University of Maine Cooperative Extension.

Introduced Species Summary Project - Japanese Knotweed -
Columbia University. Center for Environmental Research and Conservation.

Ohio Perennial & Biennial Weed Guide - Japanese Knotweed
Ohio State University. Ohio Agricultural Research and Development Center.

Japanese and Giant Knotweed - Fact Sheet: Invasive Weeds
Pennsylvania State University. Cooperative Extension.

Professional

BioBullies - Japanese Knotweed
Natural Biodiversity (Western Pennsylvania).

Invasive Plants of Ohio - Japanese Knotweed (PDF | 254 KB)
Ohio Invasive Plants Council.

Japanese Knotweed
Plant Conservation Alliance. Alien Plant Working Group.

Citations

Integrated Taxonomic Information System. Fallopia japonica. [Accessed Mar 19, 2015].

Stone, K.R. 2010. Polygonum sachalinense, P. cuspidatum, P. bohemicum. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory.

Back to Top
Last Modified: Jun 09, 2015
 
I Want To
    Read Recent News Articles
    Find Management Plans
    Locate Images
    Find Experts
   

More ...

Plants
    Species Profiles
    Databases
    Discussion Groups
    Economic Impacts
    Educational Resources
    Image Galleries
    Frequently Asked Questions
    Management
    Publications
    What You Can Do
Media Help
 To view PDF files you must have Adobe Acrobat Reader installed on your computer.

To view Flash files you must  have Macromedia Flash Player installed on your computer.

 NISIC Home | NAL Home | USDA | AgNIC | Agricultural Research Service | Web Policies and Important Links | Site Map
FOIA | Accessibility Statement| Privacy Policy | Non-Discrimination Statement | Information Quality | USA.gov | White House