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For the first time, a modern species and quantitative representation of the medicinal woody plants in the arboretum of Lugansk National Agrarian University has been determined. It was found that now, 4,242 specimens of medicinal trees, bushes and liana belonging to 65 species, 54 geni and 26 families grow on its territory. The number of specimens of each species, the content of biologically active compounds and the possibilities of using officinal and complementary medicine are given. It is indicated that the Rosaceae family is characterized by the most taxonomic variety and number of growing plants. The dominant species on the territory of the arboretum is Aesculus hippocastanum. Medicinal woody plants can be used to prevent and treat a wide range of diseases; also, they can the basis for creating a “pharmacy garden” on the territory of the university.

The performed studies determined the real number of species of medicinal plants in Apiaceae family growing on the Donbass territory. The study of literature and conducted field experiments revealed the presence of 41 species of medicinal plants of the celery family (Apiaceae Lindl.), among which 11 cultivated species. There was a brief description of botanical species studied, the typical place of growth, and the presence of biologically active compounds that determine the medicinal properties of the studied taxons. The studied plants have various quantitative and spatial relationship: 6 species are rare and are considered as protected plants, 2 species does not grow in Luhansk, 3 — in the Donetsk region, 4 species are considered to be adventitious for our region. Medicinal plants of the family celery cover a wide range of various diseases due to the large number of various biologically active substances and, primarily, essential fatty oils, flavonoids, vitamins and coumarins. It is worth noting that there no agricultural enterprises specialized on medicinal plants cultivating.

To establish a resource base of medicinal plants of Donbass, and to develop methods for their balanced use, it is necessary to conduct an inventory and analysis of the spread of wild species, that recently was not carried out in Luhansk and Donetsk region. These circumstances have served as an incentive to carry out special investigations. Test species belong to 403 genus and 108 families. List of vascular plants of Luhansk region has more than 1,200 species. We have established that in the study area, there are 718 species of medicinal plants, representing 60 % of the total flora of the region, covering so much of the taxonomic diversity of Donbass flora. The family of the Asteraceae (105 species, 50 genuses) is different in terms of the greatest number of species of medicinal plants and genus family. The families of Brassicaceae, Fabaceae, Apiaceae, Lamiaceae and Poaceae contain more than 40 species, the families of Apiaceae и Rosaceae — over 30 species, Caryophylaceae и Polygonaceae — more than 20 species, a total of 301 species. The remaining 99 families presented a small number of basic taxonomic units. The species Viscum album, Ajuga chia, Salvia nemorosa were found during expeditions. These species have not been previously described for the region.