A lichenofloristic account is given for an isolated gneiss rock formation in the Blanice river valley (Šumava Mts./Bohemian Forest foothills, South Bohemia, 49°01’N-13°56’E). Favourable climatic conditions, presence of crystalline limestone inclusions and craggy relief support a rich lichenoflora with both thermophilous and montane elements. The xerothermic community with Caloplaca demissa presumably reaches its altitudinal maximum here within the Czech Republic. On the other hand, the locality is a refuge for montane species like Pleopsidium chlorophanum. The ‘Zábrdská skála’ rock represents the lowermost locality of Phaeophyscia endococcina in the Czech Republic. Specific meso-/microclimatic conditions enable the presence of several subatlantic taxa (e.g. Bacidia viridifarinosa, Melaspilea granitophila etc.). In total, 216 species are reported here, of which three are new country records (Dirina stenhammari, Lecanora reagens and Psoroglaena stigonemoides).
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