The paper presents new localities of 38 species of lichens and 7 species of lichenicolous fungi (marked by an asterisk), endangered in the country or considered regionally rare. Several of the recorded taxa (Acrocordia cavata, Catinaria neuschildii, Gyalidea minuta, Knufia peltigerae, Paranectria oropensis, Stigmidium rivulorum and Trichonectria anisospore) were previously known from single localities in Poland. The name of each taxon is followed by data on its diagnostic features and distribution in Poland. Provided lists of localities contain geo- graphic coordinates and ATPOL grid squares, modified by S. Cieśliński and W. Fałtynowicz for the purposes of the Atlas of the Geographical Distribution of Lichens in Poland (published by W. Szafer Institute of Botany, Polish Academy of Sciences, 1993). Keywords: lichenized fungi; lichenicolous fungi; biodiversity; rare species; distribution in Poland.