This study presents the bryophyte flora of the western part of the Küre Mountains, situated in A2 square in the grid system adopted by Henderson, and entirely within the Euro-Siberian phytogeographic region. A total of 1545 bryophyte specimens were collected from the research area in 2008 and 2009. | Research Article Turk J Bot 36 (2012) 538-557 © TÜBİTAK doi: The bryophyte flora of the western part of the Küre Mountains (Bartın, Kastamonu), Turkey Muhammet ÖREN1, Güray UYAR1,*, Tamer KEÇELİ2 1 Department of Biology, Faculty of Science & Arts, Bülent Ecevit University, 67100, Zonguldak - TURKEY 2 Department of Biology, Faculty of Science, Çankırı Karatekin University, Çankırı - TURKEY Received: ● Accepted: Abstract: This study presents the bryophyte flora of the western part of the Küre Mountains, situated in A2 square in the grid system adopted by Henderson, and entirely within the Euro-Siberian phytogeographic region. A total of 1545 bryophyte specimens were collected from the research area in 2008 and 2009. According to the results of this study, 272 taxa belonging to 146 genera and 60 families were recorded. Of these, 2 taxa are hornworts, 53 taxa are liverworts, and 217 taxa are mosses. Among them, 38 taxa are new records for A2 and 4 taxa [Leiocolea badensis (Gottsche) Jörg., Cephaloziella rubella (Ness) Warnst., Diphyscium foliosum (Hedw.) , and Brachythecium tommasinii (Sendtn. ex Boulay) Ignatov & Huttunen] are recorded for the second time in Turkey. In addition, Seligeria trifaria (Brid.) Lindb. and Pseudotaxiphyllum elegans (Brid.) are new records for the moss flora of Turkey. At the same time, Pseudotaxiphyllum . is a new genus record for Turkey. Key words: Hornworts, liverworts, mosses, Küre Mountains, new national records Introduction Turkey contains a great variety of natural habitats, ranging from Mediterranean, Aegean, and Black Sea beaches to towering coastal and interior mountains, from deeply incised valleys to expansive steppes, and from fertile alluvial plains to arid, rocky hill slopes. Different community types and habitat mosaics occur, containing a rich mixture of plant and animal species, many of which are endemic (Kaya & Raynal, 2001). For the present study, the