Brazilian egeria

Hydrocharitales > Hydrocharitaceae > Egeria densa Planch.
Synonym(s): Brazilian waterweed, Brazilian elodea, South American waterweed

Brazilian egeria is a submersed aquatic plant that invades freshwater systems throughout much of the United States. The finely serrated leaves are usually less than 1 in. (2.5 cm) long and occur in whorls of 3-6. The flowers, which bloom above the surface of the water, are white with three petals. Often confused with hydrilla, Brazilian egeria has a smooth midrib on the underside of the leaf, whereas hydrilla has small teeth. Brazilian egeria invades both still and flowing water ecosystems including lakes, ponds, ditches, and rivers. It can form dense stands that crowd out native vegetation and reduce the area's value as fish habitat. It can also interfere with recreational activities such as fishing and swimming. Brazilian egeria was first introduced into the United States in the late 1800s as an aquarium plant.

Identification, Biology, Control and Management Resources

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Leslie J. Mehrhoff, University of Connecticut,

Leslie J. Mehrhoff, University of Connecticut,

Foliage; Leaf whorl
Leslie J. Mehrhoff, University of Connecticut,

Ann Murray, University of Florida,
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William T. Haller, University of Florida,
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Invasive Reference(s):

Check for most current lists.
  • Alabama - Noxious Weed Law
  • California - Invasive Plant Inventory
  • Connecticut - Noxious Weed Law
  • Georgia - EPPC list
  • Indiana - Noxious Weed Law
  • Maine - Noxious Weed Law
  • Massachusetts - Noxious Weed Law
  • Oregon - Noxious Weed Law
  • Rhode Island - Noxious Weed Law
  • South Carolina - Noxious Weed Law
  • Tennessee - EPPC List
  • Vermont - Noxious Weed Law
  • Virginia - Invasive Alien Plant Species
  • Washington - Noxious Weed Law
  • Mid-Atlantic - EPPC List
  • Invasive Plants: Western North America
  • Invasive Plants: Guide to Identification and the Impacts and Control of Common North American Species
  • Invasive Plants of the Upper Midwest
  • Invasive Plant Atlas of New England

External Links

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USDA Forest Service Bugwood University of Georgia