The current state of seminatural phytocoenoses of certain areas in Vinnytsia region is characterized. During the studies of regional flora its overall species composition is determined. It is carried out a systematic, biomorphological, ecological-coenotic analyzes. We determined that phytodiversity of investigated areas includes 268 species belonging to 168 genera, 52 families. It nas been found that according to ecological affiliation flora of agricultural landscapes belongs to the meadow, meadow-steppe, forest-nemorose type. The presence in plant communities apophytes and rare plant species indicates the value of these areas in plant diversity preservation.