Representation of arborescent plants, registered in Red Data Book of the Russian Federation, in Ukrainian forest-steppe botanical gardens and arboretums

The article presents the results of three year inventory research of rare species of arborescent plants of the Red Book of the Russian Federation (2008), cultivated in botanical gardens and arboretums located in Ukrainian Forest-steppe. It is established that 51 species grow on the territories of these two categories of natural reserve fund in the region. Out of this number, fourteen species are included in the Red List of the International Union for Conservation of Nature and Natural Resources, three species are on the European Red List, seven species are in the Red Book of Ukraine. Most of the species are classified as "rare". Representativeness of species, categories and objects of the investigated rare arborescent plants is identified according to the degree of scientific value and the number of habitats.