Pashchenko O. Semantic Stratification of Phytonymous Nomenclature of East-Slavonic Languages: Comparative and Historical Aspects.

The dissertation focuses on the study of the phytonymous nomenclature formation in the East-Slavonic languages. East-Slavonic plants' names are regarded as the result of semantic changes in the structure of Proto-Indo-European and Proto-Slavonic stems. In the study the lexical and semantic groups of the analyzed stems have been established, and the main ways of the plants' names formation in Ukrainian, Russian and Byelorussian based on these stems have been ascertained. This allowed to define the common motivated dynamic models of semantic changes in the structure of Proto-Indo-European stems on different stages of their development. The methodology of etymological analysis of dynamic processes in the semantic structure of Proto-Indo-Europian stems (roots) has been worked out. The correlation of the afore-mentioned dynamic processes with the East-Slavonic plants' names has been revealed through the Proto-Slavonic language. The major corpus of the East-Slavonic botanical borrowings of Indo-Europian as well as non-Indo-Europian origin has been analyzed. It has been proved that the semantic changes, similarly to other groups of the East-Slavonic botanical names, are realized according to definite dynamic motivated models and are accompanied by a set of specific semantic modifications, typical of individual lexico-semantic groups of the botanical lexis