Two species native to the southern United States are planted northward and escape from cultivation, although only one seems to be firmly documented as a wild plant in Michigan. The leaves are usually whorled (or nearly so), but occasionally opposite or even alternate on some shoots.
All species found in Catalpa
Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 19, 2019. https://michiganflora.net/genus.aspx?id=Catalpa.