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Water Knotweed (Persicaria amphibia (L.) Delarbre)

Also classified as Polygonum amphibium L..

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Range - Expand

Native or Not Present
Native or Expanded

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.