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Warty Caltrop (Kallstroemia parviflora J.B.S. Norton)

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Range - Expand

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 generally agreed to be native to Mexico and the south-central to southwestern US, but sources disagree about exactly where it is native. We follow BONAP's scheme which treats it as adventive in CA, and in MO, MS, and eastward. The Maryland introduction likely did not persist in the wild. We have yet to build the portion of the map in Mexico.