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Washington Hawthorn (Crataegus phaenopyrum (L. f.) Medik.)

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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.

Although the northwestern populations are clearly introduced, there was some subjectivity in choosing to classify the populations in Texas and New England as introduced or expanded. We chose to mark the Texas population as introduced because it is separated from this species native range by considerable distance, and nearby populations are not expanding. We marked populations in Michigan and New England expanded because they are closer to native populations. However, they are escapes from cultivation and could easily be marked introduced as well.