Species Information

Brazilian elodea (Egeria densa) Brazilian elodea (Egeria densa)
Richard Old, XID Services, Inc
Brazilian elodea (Egeria densa)
Richard Old, XID Services, Inc
Brazilian elodea
Egeria densa

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Similar Species
  • Common waterweed Elodea canadensis
  • Hydrilla Hydrilla verticillata

  • Has been sold around the world as a popular plant for freshwater aquariums; sometimes discarded into waterbodies and becomes established

  • Submersed, rooted, perennial plant
  • Stems reach 6 ft (2 m) in length, branch profusely at the water surface, and form thick mats
  • Stems have whorls of 4-6 small leaves, which vary from 0.5-1.5 in (1.25-3.8 cm) in length
  • Inconspicuous flowers with 3 white petals and 3 green sepals, at or above the water surface
  • Often confused with hydrilla (Hydrilla verticillata), but lacks conspicuously toothed leaf margins

  • Lakes, rivers, streams in depths to 20 ft (6.1 m)


Known Distribution in the Northeast
  • Connecticut, Massachusetts, New Hampshire, New York, Rhode Island
  • Native to South America

  • Forms dense stands that crowd out native aquatic plants and degrade wildlife habitat
  • Can impede fishing, swimming and boating
  • Restricts water movement, causing sedimentation and affecting water quality

Protecting the marine and freshwater resources of the Northeast from invasive aquatic nuisance species