The Bugwood Network
Liliopsida > Hydrocharitales > Hydrocharitaceae > Hydrilla verticillata (L. f.) Royle
Synonym(s): Florida elodea, waterthyme

Identification, Biology, Control and Management Resources
Plant Invaders of Mid-Atlantic Natural Areas - National Park Service and U.S. Fish and Wildlife Service
Biological Control of Invasive Plants in the Eastern United States - USDA Forest Service
Southeast Exotic Pest Plant Council Invasive Plant Manual - SE-EPPC

Selected Images from
Photographer:Tim Murphy, The University of Georgia
Resolutions:768x512 - PowerPoint/Web
1536x1024 - Print
Photographer:USDA APHIS Archives
Resolutions:768x512 - PowerPoint/Web
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Photographer:USDA APHIS Archives
Resolutions:768x512 - PowerPoint/Web
1536x1024 - Print
Photographer:Raghavan Charudattan, University of Florida
Resolutions:768x512 - PowerPoint/Web
1536x1024 - Print
Description:Distribution Map
Map indicates recorded presence in at least one site within the drainage, but does not necessarily imply occurrence throughout that drainage
Source:United States Geological Survey, Nonindigenous Aquatic Species, Sept. 26, 2003

Invasive and Noxious Weed References

  • Plant Protection and Quarantine. 2000. Federal Noxious Weed List. USDA Animal and Plant Health Inspection Service.
  • Invasive Exotic Plant Species of Management Concern, USDA Forest Service, Southern Region, May 18, 2001 -
  • Invasive Plant Atlas of New England -
  • Mehrhoff, L.J., K.J. Metzler, & E.E. Corrigan. 2003. Non-native and potentially invasive vascular plants in Connecticut. Center for Conservation and Biodiversity, University of Connecticut, Storrs. -
  • Florida Prohibited Aquatic Plants, Florida Bureau of Invasive Plant Management -
  • Proposed Exotic Pest Plant Species for Georgia, Georgia Exotic Pest Plant Council, August 12, 1999 -
  • South Carolina Department of Agriculture. 1983. Rules and Regulations, Noxious Weeds. South Carolina Department of Agriculture. -
  • Tennessee Exotic Pest Plant Council. Invasive Exotic Pest Plants in Tennessee. May 2001.
  • Invasive Alien Plant Species of Virginia -
Taxonomic Reference
USDA, NRCS. 2002. The PLANTS Database, Version 3.5 ( National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

USDA Forest ServiceUSDA APHIS PPQThe Bugwood Network University of Georgia Bargeron, C.T., D.J. Moorhead, G.K. Douce, R.C. Reardon & A.E. Miller
(Tech. Coordinators). 2003. Invasive Plants of the Eastern U.S.:
Identification and Control. USDA Forest Service - Forest Health
Technology Enterprise Team. Morgantown, WV USA. FHTET-2003-08.