A contribution to the lichen mycota of old beech forests in Bulgaria

In 2007 the epiphytic and epixylic lichen mycota of old beech forests in Bulgaria was investigated: 138 lichen species were found, of which 30 are reported as new to Bulgaria: Acrocordia cavata, Bacidia arceutina, B. incompta, B. neosquamulosa, Biatoridium monasteriense, Caloplaca lucifuga, Cetrelia monachorum, Chaenotheca brachypoda, C. chlorella, C. hispidula, Cladonia parasitica, Flavoparmelia soredians, Hypotrachyna afrorevoluta, Lopadium disciforme, Megalaria grossa, Menegazzia terebrata, Micarea micrococca, M. prasina, Omphalina ericetorum, Opegrapha rufescens, O. vermicellifera,  Pertusaria pustulata, Phaeocalicium polyporaeum, Placynthiella icmalea, Ramalina baltica, Rinodina efflorescens, Schismatomma decolorans, S. pericleum, Strigula stigmatella and Usnea esperantiana; several of these are rare in Europe: Caloplaca lucifuga, Cladonia parasitica, Megalaria grossa, Pertusaria pustulata and Strigula stigmatella.