Abstract
54 new species of lichenized, lichenicolous and saprobic fungi were found in the nature reserves of Augustowska Forest - Starożyn, Mały Borek and Kozi Rynek, and in Biebrzański National Park. The following species are: new to Poland - Multiclavula mucida and Polycoccum pulvinatum; rcported for the first time from the Polish lowlands - Biatora chrysantha, Normandina pulchella and Microcalicium ahlneri; new to N Poland - Leptorhaphis epidermidis; new to NE Poland - Arthrorhaphis aeruginosa, Epicladonia sandstedej E. stenospora, Lichenomphalia umbellifera, Reichlingia leopoldii and Verruaia bryoctona.
Keywords
lichens; lichenicolous and saprobic fungi; new species; old-growth forests; distribution