Notes on Hygrophoraceae — VII. On the taxonomy and nomenclature of some species of Hygrophorus

Taxonomy and nomenclature of some West European species of Hygrophorus are discussed. The current use of Hygrophorus cossus (Sow.) Fr. as correct name of H. chrysaspis Métrod is rejected. Instead the name H. discoxanthus (Fr.) Rea is reintroduced. Hygrophorus barbatulus Becker is synonymized with H. penarius Fr. Hygrophorus melizeus (Fr.: Fr.) Fr. is considered as an earlier name of H. karstenii Sacc. & Cub. and a neotype from Sweden is indicated and briefly described. Hygrophorus leucophaeus (Scop.) Fr. is rejected as a nomen dubium, the valid name of this species in its current concept being H. unicolor Gröger. Hygrophorus quercetorum P.D. Orton is reduced to a variety of H. eburneus. The new combination Hygrophorus eburneus var. quercetorum is proposed.