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Prairie Threeawn (Aristida oligantha Michx.)

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Range - Expand

Native or Not Present
Native or Expanded
Expanded or Not Present
Native or Expanded or Not Present

This tentative map is based on our own research. It may have limited data on Canada and/or Mexico, and there is some subjectivity in our assignment of plants as introduced vs. expanded. Read more in this blog post.

This grass thrives along roads and railroads, as well as in abandoned fields and overgrazed pastures. As such it has expanded on its own north of its range, particularly in Michigan, New York State, and New England.