Phylum: Basidiomycota Family: Tricholomataceae
Collybia cookei (Carestia & De Not.) N. Lundq.
A saprobic species, growing on the sclerotised remains of a previous year's fungus, usually Russula or Lactarius. It arises from a yellowish sclerotium which needs to be identified to separate it from two closely related species. Possibly a new species for the Outer Hebrides