A contribution to the lichen flora of Turkey is performed. A total of 171 lichen taxa (including 2 subspecies and 2 varieties) and 1 lichenicolous fungus are determined from 14 localities in Antalya, Çankiri, Konya and Nevsehir provinces of Turkey. Caloplaca scrobiculata H.Magn. is new to Turkey. Besides Caloplaca scrobiculata H.Magn. and Xanthoria sorediata (Vain.) Poelt were found for the second time in Asia. Carbonea vitellinaria (Nyl.) Hertel was found to grow on Candelariella vitellina (Hoffm.) Müll.Arg. while Muellerella pymaea (Körb.) D. Hawksw. var. athallina (Müll. Arg.) Triebel (lichenicolous fungus) on Tephromela atra (Huds.) Hafellner as parasitic. All lichen taxa found in Çankiri are new to this province (92 intraspecific taxa), while 39 new to Nevsehir, 8 new to Konya and 5 new to Antalya provinces. For every each taxon, the habitat pattern and distribution data are presented.