Cuman Ragweed (Ambrosia psilostachya DC.)

↑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 weedy plant thrives in disturbed habitats, including roadsides, and as such has expanded greatly eastward and northwest, into formerly forested regions that are now fragmented by roads and filled with more open anthropogenic habitats.