Sawtooth Sunflower (Helianthus grosseserratus M. Martens)

↑Range - Expand

Legend	Color
Native
Expanded
Native or Not Present
Introduced 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 species is occasionally grown ornamentally and can escape cultivation. It also can be weedy and aggressive, and spreads readily along roadsides and railroads. These factors have combined to lead it to expand east and southeast of its native range; we marked all these new populations expanded because they are mostly contiguous with its native range.