Abstract: The author discusses the type materials of Clitocybe Arnoldi Boud., C. brevipes Bigelow, C. griseifolia Murr., C. harperi Murr., C. incomis (Karst.) Orton (Collybia incomis Karst.), and C. piperata A. H. Smith. Three first-named are found to be synonymous with other species, C. harperi is a species of Rhodocybe, C. incomis is excluded from Clitocybe, and the new combination Lyophyllum piperatum (A.H. Smith) Harmaja is made. An undescribed species that is closely related to R. harperi is reported, and some connections are noted between the tribe Lyophylleae of the family Tricholomataceae and the genus Rhodocybe.