The New Rowanberry (Sorbus L.) Species For The Flora Of Nakhchivan Autonomous Republic

New species for the flora of the Nakhchivan Autonomous Republic - Sorbus albovii Zinserl., S. armeniaca Hedl., S. buschiana Zinserl., S. caucasica Zinserl., S. fedorovii Zaikonn., S. kusnetzovii Zinserl., S. migarica Zinserl. and S. tamamschjanae Gabr have been established on the basis of the results of a long-term research, including the analysis of the collected materials during scientific expeditions and the study of the literature data. The article also provides synonyms of species and information about the regularities of their distribution over high-altitude zones, habitats and the timing of flowering and fruiting