The alpine zone is exclusively defined, from the phytosociological point of view, as the zone above the forest. The investigations on the fungal diversity vary according to the studied systematic group. In the last sixty years, researches concerned more particularly Agaricales s.l., while there are very few works on pyrenomycetes and rust fungi. Discomycetes remain poorly studied. Estimates on fungal diversity indicate that a regional mycoflora (total of fungi in a given region) can count more than 1000 species.