The genus Plagiothecium (Plagiotheciaceae) in Europe — current state of knowledge, checklist and key to taxa

This manuscript presents current knowledge of the taxonomy, variability and distribution of taxa of the genus <i>Plagiothecium</i> in Europe. Currently the genus comprises 31 taxa: 17 species and 14 varieties. In this study I designated 10 lectotypes and proposes six new synonyms for the described taxa, in addition five new nomenclatural combinations: P.denticulatumvar.pseudosylvaticum, P.denticulatumvar.pungens, P.laetumvar.hercinicum, P.succulentumvar.cryptarum, and P.sylvaticumvar.immersum. Detailed descriptions and distribution data for each taxon, illustrations highlighting key taxonomic features and a diagnostic key are also provided to facilitate the identification of individual taxa.