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.
All species found in Mitchella
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 21, 2019. https://www.michiganflora.net/genus.aspx?id=Mitchella.