Seventy-three taxa are treated, 70 of which are lichens and three are lichenicolous fungi. Verrucaria alutacea and Biatora vacciniicola are new to Germany. The following six taxa are reported as new to Baden-Württemberg: Lepraria humida, Micarea coppinsii, Physcia clementei, Polycoccum microcarpum, Tephromela atra var. torulosa and Vezdaea rheocarpa. Seven species considered extinct in Baden-Württemberg have been rediscovered: Bacidia friesiana, Blastenia ferruginea, Collema glebulentum, Gyalecta derivata, Gyalideopsis piceicola, Mycobilimbia tetramera and Peltula euploca. Current findings are reported for numerous other species that are considered extremely rare or threatened with extinction according to the Red Lists of Germany and Baden-Württemberg. Where considered useful, the ecology, the distribution in the other federal states and characteristics relevant for identification are discussed. Key words: Germany, lichen diversity, lichenized fungi, red list, threatened species, Baden-Württemberg.