SUMMARYAfter exchanging descriptions, photographs, dried specimens and in one case fresh specimens, the writers propose the following synonyms.1.Collybia myriadophylla(Peck) Sacc.Collybia lilacea Quélet)2.Omphalia gracilisQuélet (=Mycena immaculata(Peck) Sacc.)3.Omphalia marginella(Pers.) Joss.&Maire (=Omphalia rugosodiscaPeck) If one prefers to conserve a name by which to designate the American form with nonbordered gill edges, the combinationO.marginella(Pers.) Joss.&Maire var.rugosodisca(Peck) Smith&Joss, should be used.4.Panellus mitis(Pers.) Singer (=Panus bacillisporusKauff.)5.Pholiota albocrenulataPeck (=Pholiota fuscaQuélet)