Etymology: Hydrilla: a small Hydra or water serpent
Plants: perennial aquatic
Invasiveness: Prohibited Invasive - Eradicate!
Conservation Status: Introduced - locally established; potentially invasive; Federal Noxious Weed
Flora of North America: Flora of North America WIS DNR-Bureau of Endangered Resources: Detailed information on Wisconsin invasive species including decription, habitats, control methods USDA Plants Database: Federal Distribution and detailed information including photos USDA Agricultural Research Service (ARS): Images of seeds, fruits, embryos, etc. USDA Agricultural Research Service (ARS): Images of seeds, fruits, embryos, etc.