Abstract: The genus Ceratostigma is closely related and in evolution paralleled to Dyerophytum. All of the three species Dyerophytum spread in differential parts of the Gondwana Land (E. Africa, S. Africa, Sokotra Islands and India). The genus Ceratostigma is discontinuly distributed in tropical E.Africa, E. Asia (from E.Himalaya in Xizang to N. and E. China, south into Thailand) with S. Xizang as the present distribution center. Probably both genera in origin and certainly evolved near the Tethys during the early Tertiary: Dyerophytum is restricted on the southern side of the Tethys, Ceratostigma has the origin centering in the region from Arabia to S. Xizang. Presence of Ceratostigma in E. AfricH indicate that the species were come from Asia before the break of Red Sea.                                    

Key words: areas, genus, ceratostigma