The taxonomic and nomenclatural problems considering Agaricus porreus and A. prasiosmus are discussed. As a result both names must be considered nomina dubia. The new species Gymnopus herinkii Antonin and Noordel. is described to replace “Collybia” porrea sensu auct.
Antonín V., Noordeloos M. E. (1996): Gymnopus herinkii spec. nov.: a critical review of the complex of Agaricus porreus and A. prasiosmus. – Czech Mycology 48(4): 309–313.