On soil (epigey) surface of Karatepa mountains 20 species of the mosses from 12 genera and 8 families were recorded during research work. On the bark of alive trees (epiphide) 10 moss species from 6 genera and 5 families were registered. On decayed wood (epsilsil) it was registered 7 species of moss species from 4 genera and 3 families. On stone (epilith) substrates of the Karatepa mountains 23 species of the mosses from 13 genera and 10 families were registered. According to research results it was found out that all type of bryoflora are distributed on four substrate ecological groups: hydrophytes, hygrophytes, mesophytes, xerophytes.