[in German with English abstract: ] The current inventory situation of the tree lungwort (Lobaria pulmonaria), which is threatened with extinction in Germany, is documented in northern Rhineland-Palatinate. The formerly quite large population near Virneburg (Eifel) is in extreme decline and highly threatened by extinction. A new discovery near Bad Bertrich is reported. Key words: lichens; Lobaria pulmonaria; biodiversity; nature conservation; red list.