Cladogelonium is a monotypic plant genus of the family Euphorbiaceae first described as a genus in 1939. The only known species is the shrub Cladogelonium madagascariense. It is found in the Analamerana Special Reserve in northern Madagascar. References Monotypic Euphorbiaceae genera Crotonoideae Endemic flora of Madagascar Taxa named by Jacques Désiré Leandri