- National Invasive Species Information Center - http://www.invasivespeciesinfo.gov/
- US Fish and Wildlife Service Invasive Species - http://www.fws.gov/invasives/
- Invasive.org - http://www.invasive.org/
- Center for Invasive Plant Management (CIPM) - http://www.weedcenter.org/
- Cornell Ecology and Management of Invasive Plants Program - http://invasiveplants.net/
- Weed Science Society of America - http://www.wssa.net/
- Western Society of Weed Science - http://www.wsweedscience.org/
Canada
ALBERTA
Alberta Invasive Plants Council
http://www.invasiveplants.ab.ca/
Alberta Environment and Sustainable Resource Development
http://www.srd.alberta.ca/RecreationPublicUse/InvasiveSpecies/Default.aspx
Alberta Agriculture and Rural Development Invasive Alien Species Management Framework
http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/prm13262
BRITISH COLUMBIA
BC Ministry of Environment
http://www.env.gov.bc.ca/wld/aliensp/
Invasive Species Council of British Columbia
http://www.bcinvasives.ca/
Electronic Atlas of the Flora of British Columbia
http://www.geog.ubc.ca/biodiversity/eflora/invasives.html
SASKATCHEWAN
Saskatchewan Invasive Species Council
http://www.saskinvasives.ca/
Government of Saskatchewan Environment
http://www.environment.gov.sk.ca/Default.aspx?DN=bf86ef8e-8fa1-4770-9933-71d2394924f7
Government of Saskatchewan Agriculture
http://www.agriculture.gov.sk.ca/Default.aspx?DN=181ad268-c23d-463c-8952-65a502f57f2b
http://www.agriculture.gov.sk.ca/Default.aspx?DN=79773c91-fd51-427e-a3ce-993e313c1289
Mexico
Programa de Especies Invasoras de México
http://www.conabio.gob.mx/invasoras/index.php/Portada
National Strategy on Invasive Species in Mexico (pdf)
http://www.conabio.gob.mx/invasoras/images/e/e4/Invasive_species_Mexico_dec2010.pdf
Weeds of Mexico
http://www.conabio.gob.mx/malezasdemexico/2inicio/home-malezas-mexico.htm
United States
WASHINGTON
Washington Invasive Species Council:
http://www.invasivespecies.wa.gov/
Washington Department of Fish & Wildlife:
http://wdfw.wa.gov/ais/
Invasive Tunicates in Washington State:
http://www.wascuba.org/tunicates/index.htm/
Washington State Noxious Weed Control Board
http://www.nwcb.wa.gov/
OREGON
Oregon Invasive Species Council:
http://www.oregon.gov/OISC/
ODA Plant Division, Noxious Weed Control:
http://www.oregon.gov/ODA/PLANT/WEEDS/
Oregon State University Pacific Northwest Nursery IPM:
http://oregonstate.edu/dept/nurspest/invasive_species.htm/
OPB The Silent Invasion
http://www.opb.org/programs/invasives/
IDAHO
State of Idaho Agriculture:
http://www.idahoag.us/Categories/Environment/InvasiveSpeciesCouncil/indexInvSpCouncil.php/
State of Idaho Parks and Recreation:
http://parksandrecreation.idaho.gov/invasivespeciesfaq.aspx/
CALIFORNIA
California Invasive Plant Council:
http://www.cal-ipc.org/
California Department of Fish and Game:
http://www.dfg.ca.gov/invasives/
California State Lands Commission:
http://www.slc.ca.gov/spec_pub/mfd/ballast_water/Ballast_Water_Default.html/
Invasive Species Council of California:
http://www.iscc.ca.gov/
MONTANA
Montana State University:
http://weedeco.msu.montana.edu/
Montana State University Extension
http://www.msuextension.org/invasiveplantsMangold/extensionsub.html/
Montana War on Weeds
http://mtwow.org/
Pulling Together Against Noxious Weeds
http://www.weedawareness.org/
Montana Weed Control Association
http://www.mtweed.org/
WYOMING
Wyoming Game & Fish Department:
http://gf.state.wy.us/ais/index.asp/
Wyoming Weed and Pest:
http://www.wyoweed.org/
Wyoming Weed Identification Site
http://www.uwyo.edu/ces/wyoweed/wyoweed.htm/
COLORADO
Colorado State University Extension:
http://www.ext.colostate.edu/pubs/ag_natr/weeds.html/
Colorado Department of Agriculture:
http://www.colorado.gov/ag/weeds/
UTAH
Utah Division of Wildlife Resources:
http://wildlife.utah.gov/dwr/invasive-mussels.html/
http://wildlife.utah.gov/fishing/nonnative/q_and_a.html/
Utah State University Extension The Weed Web
http://extension.usu.edu/weedweb/
NEVADA
University of Nevada Cooperative Extension
http://www.unce.unr.edu/programs/sites/tallwhitetop/
Nevada Department of Agriculture:
http://agri.nv.gov/plant_noxweeds_index.htm/
NORTH DAKOTA
North Dakota State University
http://www.ndinvasives.org/
North Dakota Weed Control Association
http://ndweeds.homestead.com/
North Dakota Department of Agriculture
http://www.nd.gov/ndda/program/noxious-weeds/
SOUTH DAKOTA
South Dakota Department of Agriculture
http://sdda.sd.gov/Ag_Services/Plant-Protection/Weed%20and%20Pest/State-Noxious-Weeds.aspx/
South Dakota Game Fish and Parks
http://gfp.sd.gov/wildlife/nuisance/aquatic/default.aspx/
South Dakota State University:
http://www.sdstate.edu/ps/extension/weed-mgmt/noxious-invasive.cfm/
NEBRASKA
Nebraska Department of Agriculture
http://www.agr.state.ne.us/noxious_weed/index.html/
Nebraska Weed Control Association
http://www.neweed.org/
Nebraska Invasive Species Project:
http://snr.unl.edu/invasives/invasiveplants.htm/
University of Nebraska Lincoln
http://nematode.unl.edu/neinvasives.htm/
KANSAS
Kansas Department of Agriculture
http://www.ksda.gov/plant_protection/
Kansas Department of Wildlife, Parks and Tourism
http://www.kdwpt.state.ks.us/news/Fishing/Aquatic-Nuisance-Species/
Kansas Native Plant Society:
http://www.kansasnativeplantsociety.org/invasive_plants.php/
OKLAHOMA
Oklahoma Invasive Plant Council:
http://ok-invasive-plant-council.org/
Oklahoma State University Invasive Species:
http://oklahomainvasivespecies.okstate.edu/
TEXAS
Texas Invasive Species Coordinating Committee
http://www.tiscc.texas.gov/
Texas Invasives:
http://www.texasinvasives.org/
Common Texas Invasive Plants:
http://essmextension.tamu.edu/plants/invasives/
Texas Department of Agriculture
http://www.texasagriculture.gov/RegulatoryPrograms/PlantQuality/NoxiousandInvasivePlants.aspx/
The University of Texas At Austin, Lady Bird Johnson Wildflower Center:
http://www.wildflower.org/invasive/
NTWGS:
http://www.ntwgs.org/articles/illegalAquatics.html/
MISSOURI
Missouri Department of Conservation:
http://mdc.mo.gov/landwater-care/invasive-species-management/
MBG:
http://www.mobot.org/mobot/research/mepp/welcome.shtml/
FLORDIA
Florida Department of Agriculture & Consumer Services
http://www.freshfromflorida.com/pi/index.html/
Florida Exotic Pets Plant Council:
http://www.fleppc.org/list/list.htm/
University of Florida, Center for Aquatic and Invasive Plants:
http://plants.ifas.ufl.edu/
Florida Natural Areas Inventory:
http://www.fnai.org/invasivespecies.cfm/
Florida Native Plant Society:
http://www.fnps.org/pages/plants/invasives.php/
Florida Invasive Species Partnership:
http://www.floridainvasives.org/
ALASKA
Alaska Department of Fish and Game
http://www.adfg.alaska.gov/index.cfm?adfg=invasive.main/
Aquatic Nuisance Species Task Force
http://www.anstaskforce.gov/alaska_surveys.php/
Cooperative Extension Service, Alaska Committee for Noxious and Invasive Plants Management:
http://www.uaf.edu/ces/cnipm/
University of Alaska Anchorage, Alaska Natural Heritage Program:
http://aknhp.uaa.alaska.edu/botany/akepic/
Alaska Native Plant Society:
http://aknps.org/Pages/InvasivePlants/InvasivePlantsLinks.php/
Alaska Association of Conservation Districts:
http://www.alaskaconservationdistricts.org/invasivePlants.htm/
Alaska Garden Clubs:
http://www.alaskagardenclubs.org/invasiveplants.htm/
ARIZONA
Arizona Department of Agriculture
http://www.azda.gov/PSD/psd.htm/
Arizona Game and Fish
http://www.azgfd.gov/h_f/aquatic_invasive_species.shtml/
Arizona Center for Invasive Species
http://az.gov/invasivespecies/
Northern Arizona University
http://www.cpluhna.nau.edu/Biota/invasive_exotics.htm/
University of Arizona Illustrated Guide to Arizona Weeds
http://www.uapress.arizona.edu/onlinebks/WEEDS/SPECIES.HTM/
Tonto National Forest
http://fs.usda.gov/goto/tonto/weeds
Southwest Vegetation Management Association
http://www.swvma.org/
NEW MEXICO
New Mexico Department of Agriculture
http://www.nmda.nmsu.edu/apr/noxious-weed-information/
New Mexico State Forestry Division
http://www.emnrd.state.nm.us/fd/FWHPlan/FHPIssues.htm/
New Mexico State University
http://weeds.nmsu.edu/
FEDERAL, REGIONAL, NATIONAL AND INTERNATIONAL
USGS Western Ecological Research Center
http://wildlife.utah.gov/fishing/nonnative/q_and_a.html/
Canadian Food Inspection Agency Plant Health Division
http://www.inspection.gc.ca/plants/eng/1299162629094/1299162708850
USGS Southwest Biological Science Center Southwest Exotic Plant Information Clearinghouse (SWEPIC)
http://sbsc.wr.usgs.gov/research/projects/swepic/swepic.asp/
Environment Canada
http://www.ec.gc.ca/eee-ias/Default.asp?lang=En&n=C4637128-1
Canadian Aquatic Invasive Species Network
http://www.caisn.ca/en/index.php
Government of Canada Invasive Species
http://www.invasivespecies.gc.ca/english/view.asp?x=1
Invasive Weeds of the Southwest
http://www.invasiveweeds.com/
Invaders Database System
http://invader.dbs.umt.edu/
Weed Science Society of America
http://www.wssa.net/
Invasive.org Center for Invasive Species and Ecosystem Health
http://www.invasive.org/species/weeds.cfm/
Invasive Species Info
http://alic.arid.arizona.edu/invasive/html/
Center for Invasive Plant Management:
http://www.weedcenter.org/
National Invasive Species Information Center
http://www.invasivespeciesinfo.gov/index.shtml/
USGS Nonindigenous Aquatic Species by State
http://nas.er.usgs.gov/queries/StateSearch.aspx/
National Agricultural Pest Information System Pest Tracker
http://pest.ceris.purdue.edu/states.php/
Early Detection & Distribution Mapping System:
http://www.eddmaps.org/
Ecologically Based Invasive Plant Management
http://www.ebipm.org/
North American Weed Management Association
http://www.nawma.org/
PLANTS database Invasive and Noxious Weeds
http://plants.usda.gov/java/noxiousDriver/
The Nature Conservancy Global Invasive Species Team
http://tncinvasives.ucdavis.edu/
eNature.com Native Gardening and Invasive Plants Guide
http://enature.com/native_invasive/invasives.asp/
Environmental Law Institute Status and Trends in Invasive Species Policy: 2002-2009 publication
http://www.elistore.org/reports_detail.asp?ID=11399/