This genus consists of only two species, one in eastern Asia and the other in eastern North America. No other genera of Rubiaceae display this pattern.
Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 19, 2025
https://mifloradev.lsa.umich.edu/flora-demo/#/genus/Mitchella