Spilonema paradoxum a Thermutis velutina - dvě překvapení v herbářích PRC

Two rare species of lichens — Spilonema paradoxum Born (North Bohemia, Jizerské hory Mts.) and Thermutis velutina (Ach.) Flot. (South Moravia, Znojmo) were determined during a revision of Racodium rupestre Pers. in PRC. Microscopical characters of these and related species are compared.