Hydrilla verticillata (L. f.) Royle (ITIS)
Hydrilla, Florida elodea, water thyme, Indian star-vine
Eastern Hemisphere; U.S. strains possibly originated in Asia (Balciunas et al. 2002)
1950s (Balciunas et al. 2002)
Aquarium trade (Balciunas et al. 2002)
Crowds out native species; impedes irrigation and boating (Balciunas et al. 2002)
DOD. USACE. Buffalo District.
The U.S. Army Corps of Engineers Buffalo District is on a mission to fight hydrilla, an aggressive plant species that has wreaked havoc from Asia to every continent except Antarctica. "Hydrilla completely chokes out our waterways and impacts all the things we enjoy,” said Michael Greer, USACE Buffalo District project manager." It affects water quality, the economy, businesses, hydropower and flood reduction - ultimately our health and our wallets." Buffalo District’s main projects to eradicate hydrilla are at the Erie Canal and Tonawanda Creek, Tonawanda, NY, as well as on Cayuga Lake near Aurora, NY and Ithaca, NY. The District provides assistance on Pymatuning Lake which borders Pennsylvania and Ohio, and at Raystown Lake in south central Pennsylvania. Buffalo District is also lending expertise to a project on the Connecticut River. Funding for the project is available through the Corps of Engineers Aquatic Plant Control Research Program and Great Lakes Restoration Initiative.
Distribution / Maps / Survey Status
Includes species listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between States without a permit.
Google. YouTube; University of Florida. IFAS. Center for Aquatic and Invasive Plants.
Google. YouTube; Cornell University. Naturalist Outreach.
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Hydrilla.
Council or Task Force
California Invasive Plant Council.
Washington State Recreation and Conservation Office. Washington Invasive Species Council.
USDA. APHIS. PPQ. Center for Plant Health Science and Technology; California Department of Food and Agriculture.
Ontario's Invading Species Awareness Program (Canada).
New York Invasive Species Clearinghouse.
Texas Commission on Environmental Quality, Galveston Bay Estuary Program; Houston Advanced Research Center (HARC).
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Smithsonian Institution. Smithsonian Marine Station at Fort Pierce.
Smithsonian Institution. Smithsonian Environmental Research Center. Marine Invasions Research Lab.
USDA. ARS. National Genetic Resources Program. GRIN-Global.
State and Local Government
New York Department of Environmental Conservation.
Missouri Department of Conservation.
See also: Invasive and Problem Plant Control (scroll to Invasive Plants section) for more information to help you identify and control most common invasive plants in Missouri
Pennsylvania Department of Conservation and Natural Resources.
See also: Invasive Plant Fact Sheets for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands
Colorado Department of Agriculture. Conservation Services Division. Noxious Weed Program.
University of Florida. IFAS. Center for Aquatic and Invasive Plants.
Balciunas, J.K., M. J. Grodowitz, A.F. Cofrancesco and J.F. Shearer. 2002. Hydrilla. In: R. Van Driesche et al. (Eds.), Biological control of invasive plants in the eastern United States (FHTET-2002-04). Morgantown, West Virginia: U.S. Forest Service Forest Health Technology Enterprise Team.
Integrated Taxonomic Information System. Hydrilla verticillata. [Accessed Sep 10, 2014].