Table of Contents Introduction…………………………………………………………………… 1. Some basic features of phraseological units……….……… 1.1. The essence of the phraseology………………………. 1.2. The basic criteria of phraseological units……………………… 1.3. Phraseology as a subsystem of language………………….. 1.4. Some problems of the diachronic approach to phraseological units…… 1.5. Lingvocultural aspects of phraseological units………………………… 2. Classifications of phraseological units …………………………………. 2.1. Semantic classification of phraseological units ……………….... 2.2. Structural classification of phraseological units ………………... 2.3. Syntactical classification of phraseological units………………… 2.4. Contextual classification of phraseological units… ………………... 2.5. Prof. Kunin's classification for phraseological units ………………. 3. Structural and semantic analysis of phraseological units containing phytonyms in English and Russian languages………………………………………………. Conclusion…………………………………………………………………… List of literature…………………………………………………………..........