One of the three Czech Peltigera species with green thallus, which completely lacks veins on the lobe underside. It overgrows bryophytes on acidic oligotrophic soil, less often also on siliceous stones and rocks. Sometimes, the species grows directly on humus and soil. It is a boreal-montane to arctic-alpine element, occurring in central Europe more frequently only in the Alps. In the past, the lichen used to occur sparsely throughout the Czech Republic, mainly in mountains. However, it has significantly declined due to its sensitivity to environmental pollution (eutrophication, acid rain) and apparently also to mesoclimatic changes accompanying the changes in the landscape management. Currently, P. aphthosa may be found only in a few localities in the Šumava Mts.
Literature: Liška J., Dětinský R. & Palice Z. (1998): A project on distribution changes of lichens in the Czech Republic. – Sauteria 9: 351–360.taxonomic classification:
All records: 17, confirmed 13. One click on a selected square displays particular record(s), including their source(s).