In the 10th issue in the series ‘Contributions to the bryofloristic exploration of Switzerland’ new sites of rare or threatened or otherwise remarkable bryophyte species are described. The following species are included: Cephaloziella phyllacantha, Cryphaeae heteromalla, Didymodon sinuous, Orthotrichum microcarpum, Rhabdoweisa crenulata, Riccia canaliculata, Riccia cavernosa, Tortella alpicola, Trichostomum triumphans, Ulota hutchinsiae.