The results of botanical and geographical analysis for the arboreal and semi-tree plants (arboriphytes) of the Olkhinsky plateau are presented. The studied flora is mostly complicated of species whose ranges extend far beyond Asia (67 species; 55.4 % of the flora composition). The zonal complex of species prevails, of which the forest complex is the leader, including 77 species (63.6 % of the flora composition). Uniqueness of the analysed flora is given by South Siberian (10 species; 8.3 %), as well as common Asian (Populus suaveolens Fisch.), East Asian (Lonicera edu-lis Turcz. ex Freyn), Okhotsk (Salix brachypoda (Trautv. et C. A. Mey.) Kom.), Manchurian-Daurian (Artemisia messerschmidtiana Besser), including 1 species each. Endemic plants for the Plateau 3 species: Salix divaricata Pall., Cotoneaster lucidus Schlecht., Thymus baicalensis Serg. In general, the analysed flora was formed within the framework of florogenetic features for the region and has an average degree of anthropogenic and technogenic transformation, which is estimated at 11.6 %.

Efimov Yurii Gennadyevich, Undergraduate, Irkutsk Agrarian University named after A. A. Ezhevsky, 1/1, Molodezhny settl., 664038, Russian Federation, e-mail: larin-sanitar@mail.ru

Enin Eduard Vladimirovich, Postgraduate, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, Research Scientist, Zapovednoe Pribaikalye, 291B, Baikalskaya st., Irkutsk, 664050, Russian Federation, e-mail: edward_lp@icloud.com

Vinkovskaya Oksana Petrovna, Candidate of Science (Biology), Associate Professor, Irkutsk Agrarian University named after A. A. Ezhevsky, 1/1, Molodezhny settl., 664038, Russian Federation, e-mail: urbanoflora@yandex.ru

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