The analysis of the genus Rosa L. in the flora of Dagestan

The given article dwells upon the floristic composition of the wild roses in Dagestan which includes 46 species. The species composition of roses of Dagestan has not been sufficiently researched and requires a more serious and detailed approach. The aim of the given work is the inventory of the flora of the wild roses of Dagestan. Stemming from this, the following tasks are being solved: specification of the species composition and geographic dissemination of the species of the genus Rosa L. in Dagestan. In sum, the taxonomic composition of the genus Rosa in Dagestan is not homogeneous. Within it there can be definitely singled out large species characterized by wide distribution and close concordance with the diagnoses of descriptions. These are the species R . canina L., R. corymbifera Borkh., R. pimpinellifolia L., R. oxyodon Boiss.. All of them possess high polymorphism and for these species there has been pointed out a great number of forms with different variations of signs. The second group is composed of the species with smaller natural habitats, and they are usually less changeable. It has been established that the leading geoelements are the Caucasian and Dagestani ones. A high percentage of the endemic species testifies to the fact that the examined area, as well as the Caucasus in general, is the centre of intensive speciation.