New records of Parmelia ernstiae and P. serrana (Ascomycota, Parmeliaceae) in Poland

The paper reports new localities of lichens Parmelia ernstiae and P. serrana in Poland. Both species are reported for the first time from the Polish part of the Sudety Mountains (southwestern part of the country). The new localities were found in the area of the Sowie Mountains (central part of the Sudety Mts) as well as Śnieżnik Massif and Bialskie Mountains (eastern part of the Sudety Mts). Most of the recorded specimens were associated with the bark of Acer platanoides and A. pseudoplatanus. Parmelia ernstiae and P. serrana are still poorly known species in Poland and often confused with similar taxon P. saxatilis. Therefore the morphological characteristics, chemical properties, ecology and distribution of these species are presented and briefly discussed