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Swordleaf Rush (Juncus ensifolius Wikstr.)

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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.

This plant may be spread to new areas by waterfowl, or both accidentally or intentionally by humans. It has also spread to other continents, including Hawaii and New Zealand, through contaminating seed mixes. There is some debate about which of the isolated eastern populations are native vs. introduced. We have used BONAP's scheme as a starting point. We mark the Wisconsin population as expanded because of proximity to the native range in Michigan's upper peninsula.