Contribution to the flora of mosses and liverworts of Yuzhny, Vaygach and Matveev islands (Barents Sea, European Russian Arctic)

The paper provides data on mosses and liverworts of the islands of south-eastean of the Barents Sea: Yuzhny Island of Novaya Zemlya, Vaygach and Matveev islands based on 700 identifications of mosses and 200 identifications of liverworts. The annotated list includes 173 species and one variety of mosses and 52 species and nine infraspecific taxa of liverworts, including insufficiently known Blepharostoma trichophyllum hybrib 1, Barbilophozia rubescens, Saccobasis polita var. arctica, Trilophozia quinquedentata var. grandiretis. Among them, 17 species and one variety of mosses and 13 species, two varieties and two forms of liverworts are reported for the first time for Novaya Zemlya, 66 species of mosses, and 16 species and one variety of liverworts for the first time for Yuzhny Island, 14 species of mosses, and six species, two varieties and one form of liverworts are reported for the first time for Vaygach Island. The first data of bryophytes of Matveev Island are obtained: 44 species of mosses, and 11 species and one variety of liverworts are recorded. For every species, data on localities, frequency, and habitats are provided. New combinations are published for Mesoptychia gillmanii f. orbiculata (R. M. Schust.) Potemkin, comb. nov., and Trilophozia quinquedentata var. grandiretis (H. Buch et S. W. Arnell) Potemkin, comb. nov.