Prairie Threeawn (Aristida oligantha Michx.)

↑Range - Expand

Legend	Color
Native
Expanded
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.

Although this plant occurs somewhere in each of these regions, it may only occur in a small part of some or all of them.

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.