The taxonomy ofInocybe similisand closely allied species is addressed using morphological and molecular data (nrITS and nrLSU DNA). The holotypes ofI. chondrosporaandI. vulpinellaand the isotype ofI. immigranswere studied and sequenced. Our results suggest the synonymy betweenI. similisandI. vulpinellaas well as that betweenI. chondrosporaandI. immigrans.