Comparative floristic studies of island hogs of the southern border of the Pinus sylvestris range on the territory of the East European plain and the southern outskirts of the Ural mountain country

The article considers the natural relict forests of Pinus sylvestris L. within the southwestern boundary of the range at the junction of geomorphological areas and floristic areas within the Orenburg region. Relict plantings are characterized by high floral diversity and are subdivided on the basis of geobotanical studies into the following communities: grass-mossy pine forests; lichen pine forests; oak-lime pine forests; grass pine forests of depressions and hills - Buzuluksky forest; grass pine forests of depressions; sparse woodlands at rock outcrops - Karagai - Pokrovsky forest. Adrianople, Bolotovsky, Aland island forests are represented by sparsely wooded rock outcrops with the presence of areas of depressions and hills - grass pine forests. The revealed floristic differentiation between the studied forests is largely associated with isolation and remote location in a limited area in a region with increasing intensity of economic use over the past decades, as well as with the evolutionary processes of the formation of the Pinus sylvestris L. habitat. at the junction of two parts of the world of Europe and Asia, which are manifested in the features of the geomorphological structure and convergence of botanical and geographical zones.