The Red List of threatened macrofungi of Switzerland 2007 lists all ascomycetes and basidiomycetes, classified as macrofungi and known to occur in Switzerland, together with their categories of threat according to the IUCN criteria. 32 % of all macrofungi with a reasonable state of knowledge are threatened. Nutrient poor grasslands, mires, and coarse woody debris are habitats with high percentages of threatened fungi.