An annotated list of mosses of the Yana-Adycha Plateau (north-east Yakutia) is presented, including 173 species and 3 varieties of mosses from 83 genera and 34 families. The flora includes many rare xerophytic shecies: Hilpertia velenovskyi, Pterygoneurum kozlovii, Syntrichia caninervis, Fabronia ciliaris, Coscinodon cribrosus, C. hartzii. Orthotrichum сupulatum is a new addition to Yakutian flora.