Species of Buxus are commonly cultivated in southern Michigan, and may seed readily in gardens, but have not yet been seen wild in Michigan. They are opposite-leaved shrubs with small, short-petioled elliptic, oblong, or ovate evergreen leaves.
All species found in Buxaceae
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 26, 2020. https://michiganflora.net/family.aspx?id=BUXACEAE.