Didymodon tomaculosus (Blockeel) M.F.V. Corley, new to the moss flora of Turkey and Asia

Didymodon tomaculosus (Blockeel) M.F.V.Corley is reported for the first time from Turkey, bringing the total number of Didymodon species known from Turkey to 19. D. tomaculosus is also reported first time to the moss flora of Asia. It is a very rare species and was known only from British Isles and south of Germany. Description, illustrations and diagnostic characters of the species are given, together with notes on its ecology. Bryophytes rank second among the major groups of green plants, with an estimated 15,000 species world-wide and they have successfully exploited many environments, possibly because they are rarely in direct competition with vascular plants. Unfortunately, knowledge of the Turkish bryoflora is still far from complete. To date, neither Turkish nor foreign bryologists have visited some regions, especially the south-eastern Turkey. However, some recent additions with increasing research activities indicate that quite a number of new discoveries may be expected. The genus Didymodon belongs to the family Pottiaceae, and is represented by about 120 species distributed in temperate and montane habitats. Plants are usually forming tufts, cushions or patches. Stems have central strand. Leaves are appressed, curved or crisped when dry, erect-paten