Invasive Plant Atlas of New England (IPANE) - Water chestnut, European water chestnut
University of Georgia. Center for Invasive Species and Ecosystem Health.
Invasive Plant Atlas of the United States - Water
University of Georgia. Center for Invasive Species and
New York Invasive Species Information - Water Chestnut
New York Invasive Species Clearinghouse.
Northeast Aquatic Nuisance Species Panel.
Invasive Species Compendium - Trapa natans
Global Invasive Species Database - Trapa natans (aquatic plant)
IUCN. Species Survival Commission. Invasive Species Specialist Group.
Nonindigenous Aquatic Species Database: Fact Sheet - Water Chestnut
DOI. USGS. Wetland and Aquatic Research Center.
Provides distribution maps and collection information (State
U.S. National Plant Germplasm System - Trapa natans
USDA. ARS. National Genetic Resources Program. GRIN-Global.
PLANTS Database - Water Chestnut
USDA. NRCS. National Plant Data Center.
Connecticut River Coordinator's Office.
National Exotic Marine and Estuarine Species Information System (NEMESIS): Chesapeake Bay Introduced Species Database - Trapa natans
Smithsonian Institution. Smithsonian Environmental Research Center. Marine Invasions Research Lab.
Weed Alert: Water caltrop
New South Wales Department of Primary Industries (Australia). Agriculture.
Fact Sheet: European Water Chestnut (PDF | 410 KB)
Ontario Ministry of Natural Resources (Canada).
Aquatic Invasive Species: Water Chestnut (May 2005; PDF | 96 KB)
Indiana Department of Natural Resources.
See also: Invasive Species for exotic animal and plant pests invading Indiana, causing economic and visual damage.
Aquatic Invasive Species: Water Chestnut
Maryland Department of Natural Resources.
Water Chestnut: An Exotic Invasive Aquatic Plant (PDF | 1.69 MB)
Massachusetts Department of Conservation and Recreation.
Chestnut Discovered in New Hampshire Waters -
Environmental Fact Sheet (2010; PDF | 746 KB)
New Hampshire Department of Environmental Services.
Invasive Plants in Pennsylvania: European Water Chestnut (PDF | 107 KB)
Pennsylvania Department of Conservation and Natural Resources.
See also: Invasive Plants fact sheets (scroll to view) for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands.
AIS Action Plan: Water Chestnut (Jun 2011; PDF | 130 KB)
Pennsylvania Fish and Boat Commission.
Freshwater Aquatic Invasive Species in Rhode Island: Water Chestnut (Oct 2010; PDF | 789 KB)
Rhode Island Department of Environmental Management. Office of Water Resources.
Wisconsin Department of Natural Resources.
Weed Control in Natural Areas in the Western United States: Water Chestnut (2013; PDF | 279 KB)
University of California. Weed Research and Information Center.
Maine Invasive Plants Bulletin: Water Chestnut
University of Maine. Cooperative Extension.
See also: Maine Invasive Plants & Entire Series for entire series of 22 fact sheets and invasive plants brochure (available in HTML/PDF or for purchase)
Aquatic Invasive Species in the Chesapeake Bay - Water Chestnut (Sep 2013; PDF | 101 KB)
Maryland Sea Grant.
Introduced Species Summary Project - Water Chestnut
Columbia University. Center for Environmental Research and Conservation.
Water Chestnut (Trapa natans) in the Northeast (Feb 2006; PDF | 350 KB)
New York Sea Grant.
Invasive Plant Fact Sheet - European
Water-chestnut (Nov 2011; PDF
| 271 KB)
University of Pennsylvania. The Pennsylvania Flora Project of Morris Arboretum.
See also: Invasive Plant Fact Sheets for additional invasive plants in Pennsylvania
Invasive Species Fact Sheets - Water Chestnut
University of Wisconsin Sea Grant Institute.
Field Guide to Aquatic Invaders and Their Native
Look Alikes - Water
Maine Volunteer Lake Monitoring Program.