This work gives an overview of the diversity and distribution of the foliose genera of the family Physciaceae occurring in Bulgaria. Within the framework of a project, supported by the Bulgarian Academy of Sciences (BAS), several months lasting field works took place, old collections were examined and bibliographical references were evaluated. The first field works, which lasted for three months during 2009 were carried out by myself and included parts of the country, where less or no data were known from together with already well explored areas.The treatment of the first collections took place under the direction of Prof. Helmut Mayhofer, with whom I had the privilege to undertake a further one-week lasting expedition during spring 2010, which led us to faraway areas in the Southwest of the country: West Frontier Mts, Valley of River Struma, Mt Belasitsa and Mt Slavyanka. The examination of all specimens provided the yield of 962 specimens, whereof 439 belonged to the lichen family Physciaceae, the bigger part of which was classified into the foliose genera. Further 144 specimens from the National Historical Museum and BAS, collected by the Bulgarian botanist B. Zhelezova between 1950 and 1979, were efficiently examined and revised for the most part. The family of Physciaceae and the single genera with keys for determination of the species are presented. The foliose including the subfruticose species, which have been registered in old and actual field investigations on the territory of the country, are described and accurate localities are listed. Ecology, global distribution and special characteristics, as well as associating species are expressed. New species for the single floristic regions are emphasised in the descriptions, two new species for Bulgaria are Physciella nepalensis and Physconia thorstenii. Distributional maps and photographical images of many species are provided for a better visualisation and orientation.