Lichens, allied fungi and lichenicolous fungi, collected during a trip through southern and central Switzerland are listed. The following annotated list contains 258 identified species that are new and/or rare in Switzerland. Agonimia vouauxii (de Lesd.) ined., Bacidia absistens (Nyl.) Arnold, Biatoridium delitescens (Arnold) Hafellner, Dermatocarpon leptophyllum (Ach.) Lang, Hymenelia similis (A. Massal.) Poelt & Vezda, Lepraria aff. flavescens Clauzade & Cl. Roux, Micarea botryoides (Nyl.) Coppins, M. leprosula (Th. Fr.) Coppins & A. Fletcher, Protoparmelia hypotremella Herk, Spier & Wirth, Rinodina rinodinoides (Anzi) H. Mayrhofer & Scheid., Strigula aff. phaea (Ach.) R. C. Harris, Thelopsis flaveola Arnold, Tremella coppinsii Diederich & Marson, T. phaeophysciae Diederich & M. S. Christ have been recorded for the first time in the country.