Gretchen M. Ionta, Walter S. Judd, Norris H. Williams and W. Mark Whitten. "Phylogenetic Relationships in Rhexia (Melastomataceae): Evidence from DNA Sequence Data and Morphology" International Journal of Plant Sciences Vol. 168 Iss. 7 (2007) p. 1055 - 1066
Available at: http://works.bepress.com/gretchen-ionta/17/