The study covers Phase 2 of the ecological-phytogeographic analysis of the dendroflora of Lozenska Mountain. Its purpose is to characterize 15 species-edificators of tree and shrub communities in the mountain and to point out the indicators that most determine the assessment of their ability to long-term adaptability to mountain conditions (convertibility). The performed characterization of the edificators with respect to the reference species shows some heterogeneity in the influence of the factors and the distribution of the groups of species. Indicators, which determinate the most convertibility assessments of edificators are cryoclimatic factor, edaphic regimes and soil pH.