Northern Catalpa (Catalpa speciosa (Warder) Warder ex Engelm.)

↑Range - Expand

Legend	Color
Introduced
Expanded
Introduced or Not Present
Native or Expanded
Expanded or Not Present
Expanded or Introduced
Native or 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 has been widely planted in landscaping, and also spreads readily through wind-dispersed seeds, thriving along roadsides, railroads, and in other disturbed habitats. As a result it has greatly expanded its range in the east, contiguously with its native range. We mark western populations introduced because they are separated by regions probably too arid for this species to survive.