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Trumpet Vine (Campsis radicans (L.) Seem. ex Bureau)

Also known as trumpet creeper, cow itch vine.

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Range - Expand

Native or Not Present
Introduced or Not Present
Native or Introduced
Native or Expanded
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 native to the southeastern US, but it is now found considerably north and west of its native range. Many of these new populations originated from garden escapes, but this plant is also weedy and able to spread on its own. We have marked most of the eastern populations as Expanded, as this plant seems to be expanding contiguously with its native range, even if aided by garden escapes. However, we have marked western populations as Introduced because they have been introduced across geographic divides in which this species does not occur. Some populations, such as those in the Dakotas and eastern New Mexico, represented a tough judgment call and could have easily been classified differently.