SD Least Wanted.comAquatic invasive Species

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Flowering Rush




When flowering, an umbrella shaped cluster flowers can be found at the top of a triangular green stem. Individual flowers are composed of three white and pink petals.


Singular and small stands of plants may have little impact on a water body, but this plant often grows into very dense stands that can limit recreation along the shoreline.

Range Expansion:

Flowering rush stands spread by rhizomes (underground stems), floating seeds, and by root fragments that break off during removal. The plant can also be spread via seed or root transportation by boats.

South Dakota Distribution:

Keep Aquatic Invasive Species Out of South Dakota's Waters


  • Remove aquatic plants and animals before leaving any waterbody.
  • Drain water from bait bucket, live well, bilge and motor before leaving any waterbody.
  • Dispose of unwanted bait, fish parts, and worms in the trash.
  • Spray/wash boat, trailer, and equipment with high pressure hot water on your way home or at home -OR- dry everything for at least 5 days.
  • Always report questionable species.


  • Never release live animals or plants - this includes all aquarium species, bait, pets or water garden plants. Do not release these into the wild. If you cannot find another home for animals, dispose of them in a trash can or bury them. Seal plants in plastic bags and dispose.


Because these hitchhikers can:

  • Reduce game fish populations
  • Ruin boat engines and jam steering equipment
  • Make lakes/rivers unusable by boaters and swimmers
  • Dramatically increase the operating costs of drinking water plants, power plants, dam maintenance, and industrial processes
  • Reduce native species
  • Degrade ecosystems
  • Affect human health
  • Reduce property values
  • Affect local economies of water-dependent communities.
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