200 lichen species were recorded. Most interesting sites are rain protected rock faces with subneutrophytic and rather thermophytic lichens as Lecanora demissa, Xanthoria fa !lax and Diploicia canescens, and shaded rocks with Enterographa hutchinsiae, Opegrapha zonata, Opegrapha lithyrga, Haematomma ochroleucum. Acidophytic terricolous communities characterized by Cladonia species e.g., Cladonia foliacea, Cladonia strepsilis, Cladonia cervicomis, Cladonia uncialis, Cladonia portentosa, are well developed at several localities. In contrast to the lichen flora on soil and rock the epiphytic lichen flora is rather poorly developed, probably because of the influence of acid air pollution and the scarcity of old trees. The situation of the investigated area in western Central Europe is manifested in the occurrence of some subatlantic species as Cladonia foliacea, Ochrolechia parella, Lecanora gangaleoides, Parmelia mougeotii. Noteworthy species are Parmelia crinita, Lepraria lesdainii, Fuscidea recensa, Rinodina fimbriata.