Phylum: Basidiomycota Family: Cortinariaceae
Cortinarius decipiens var. decipiens (Pers.) Fr.
Sepia Webcap
Widespread, but infrequently recorded, in association with broadleaf trees, especially Salix and Betula. The considerable variability in appearance of this species makes identification challenging
References:
Breitenbach & Kranzlin (2000) Fungi of Switzerland, Volume 5, Agarics, 3rd Part
Knudsen & Vesterholt, editors (2012) Funga Nordica