The present paper deals with critical discussions on Hibiscus Micranthus L.F., H. aristivalvis Garcke and H. purpureus Forssk. H. micranthus var. ovalifolius sensu Boiss., generally accepted as a distinct variety, is reduced to the synonymy under H. micranthus var alii S. abedin which is described as a new variety. H. micranthus var asper Cuf. is reduced to the synonymy under H. micranthus van rigidus (L.F.) Cuf.