Two additional species occur in eastern Asia, representing a disjunct distribution pattern between eastern North America and eastern Asia well displayed in many families.
All species found in Sassafras
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 30, 2017. http://michiganflora.net/genus.aspx?id=Sassafras.