Snow On The Mountain (Euphorbia marginata Pursh)

↑Range - Expand

Legend	Color
Native
Introduced
Expanded
Not Present
Native or Not Present
Introduced or Not Present
Native or Expanded
Expanded or Not Present
Native or Expanded or Not Present
Expanded or Introduced 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 widely agreed-upon to be native to the central US and Mexico. It has, however, expanded its range east and north, mostly from garden escapes; we mark most of these populations Expanded because they are largely contiguous with the native range. The California populations and perhaps the Utah populations are separate from the native range by fairly large gaps, so we marked these as Introduced and either Introduced/Expanded, respectively. We have yet to build the portion of the map in Mexico.