Phylum: Basidiomycota Family: Russulaceae
Lactarius blennius (Fr.) Fr.
Beech Milkcap
Very common under Beech Fagus sylvaticus trees. The viscid cap is quite variable in colour
References:
Heilmann-Clausen et al. (2000) The Genus Lactarius
Overall (2017) Fungi: Mushroom & Toadstools of parks, gardens, heaths and woodlands
Breitenbach & Kranzlin (2005) Fungi of Switzerland, Volume 6, Russulaceae