Medusandra
Medusandra is a genus of flowering plants in the family Peridiscaceae. It has two species, "Medusandra richardsiana" and "Medusandra mpomiana". "M. richardsiana" is the most common and well known. Both species are native to Cameroon and adjacent countries. "Medusandra" was named by John Brenan in 1952. Brenan put "Medusandra" in its own family, Medusandraceae, and added "Soyauxia" to that family in 1953. Most authors, however, maintained Medusandraceae as a monogeneric family and put "Soyauxia" elsewhere. A detailed description of "Medusandra" was published by John Hutchinson in 1973. When the APG II system was published by the Angiosperm Phylogeny Group  in 2003, "Medusandra" and "Soyauxia" were listed in an appendix as "taxa of uncertain position". The first molecular phylogenetic study to include "Medusandra" appeared in 2009. It showed that "Medusandra" is sister to a clade consisting of "Soyauxia", "Peridiscus", and by implication, "Whittonia". These three genera are in Peridiscaceae, and the authors, Kenneth Wurdack and Charles Davis, recommended that "Medusandra" be added to Peridiscaceae. When the APG III system was published in October 2009, Peridiscaceae was expanded to include "Medusandra" and "Soyauxia".