first time from the A4 square of Turkey.

Abstract: This investigation covers studies undertaken on the liverworts of the Altındere Valley National Park, including the histo-rical Sumela Meryemana Monastery located in the town of Maçka, province of Trabzon. As a result, 33 species belonging to 16 families of the class Marchantiopsida (Hepaticae) of the division Bryophyta have been identified. Of these, Porella arboris-vita