European Frogbit

(Hydrocharis morsus-ranae)

General description:

A free-floating annual aquatic herb in the Frog’s Bit family. Can dramatically affect native aquatic life and limit recreational activities.

Ecological threat:

  • Invades shallow, quiet, or slow-moving water; edges of lakes, rivers, and streams; swamps, marshes, and ditches.
  • Forms large colonies of dense, floating mats that can dramatically affect native aquatic life and limit recreational activities.
Hydrilla
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Hydrilla

(Hydrilla verticillata)
Lyme Grass
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Lyme Grass

(Leymus arenarius or Elymus arenarius)