Biogeographical map of the Great Plains.

Showing the different Temperate grasslands ecoregions of the Great Plains in territory claimed by the United States.
  Short-grass prairie—(High Plains)  Mid-grass prairie  Tall-grass prairieTransparency is enabled so that state borders can still be discerned.
Data from a display at Brigham Young University's Bean museum.
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Blank_US_Map.svg: User:Theshibboleth