Phylum: Basidiomycota Family: Strophariaceae
Agrocybe praecox (Pers.) Fayod
Spring Fieldcap
As the common name suggests, an early fruiting fungus. A rare species in the north, found growing in damp hollows in a stable dune system, also on wood mulch. Quite variable in microscopic detail
References:
Knudsen & Vesterholt (2012 second edition) - Funga Nordica