Polysphaeria is a genus of plants in the family Rubiaceae, and its native range is Madagascar and Tropical Africa.[1] It contains the following 22 species according to Plants of the World Online:[1]
^Bentham, G. & Hooker, J.D. (1873). "Polysphaeria". Genera Plantarum Ad Exemplaria Imprimis in Herbariis Kewensibus. 2 (1): 108.{{cite journal}}: CS1 maint: multiple names: authors list (link)