TAXONOMIC COMPOSITION AND ECOLOGICAL-GEOGRAPHICAL ANALYSIS OF THE FAMILY HELIOTROPIACEAE AND BORAGINACEAE OF THE FLORA OF REPUBLIC OF UZBEKISTAN
Svetlana V. Ovchinnikova1, Natalia Yu. Beshko2, Dilorom M. Tajetdinova2, Komiljon Sh. Tojibaev2
1Central Siberian Botanical Garden, SB RAS, Novosibirsk, Russia
2Institute of Botany Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
Keywords: Heliotropiaceae, Boraginaceae, flora, ecological analysis, chorological group, range type, endemic, Middle Asia, Uzbekistan
Abstract
The research was carried out within the framework of the “Flora of Uzbekistan” project. In connection with the critical revision of the species of the families Heliotropiaceae and Boraginaceae of the flora of Uzbekistan, the herbarium materials stored in the Herbariums LE, MW, TASH, AA, TAD, NS, NSK, TK, P were studied. Heliotropiaceae is represented by 2 genera and 15 species and the family Boraginaceae by 31 genera and 118 species distributed in 10 tribes. The largest number of species is represented by genera from the tribes Eritrichieae (31) and Cynoglosseae (25). The tribe Lithospermeae (21) is distinguished by the specificity of the species composition. Species of family Heliotropiaceae and small tribes Trichodesmeae (3), Heterocaryinae (6), Myosotideae (9) emphasize the ancient nature of the flora of the republic. Representatives of the tribes Boragineae (8) and Echieae (3) were either introduced in ancient times, naturalized and occupy vast areas, or occupy weedy habitats. When comparing the taxonomic composition of borage in Uzbekistan with the composition of genera and species of the neighboring republics of Central Asia, it was found that the borage flora of Turkmenistan and Tadjikistan is characterized by the closest composition. When analyzing the ranges of all species found on the territory of Uzbekistan, three chorological groups with 14 types of ranges were identified. It is shown that the Iranian-Turanian chorological group determines the specifics of the species composition of borage in Uzbekistan, and the Holarctic chorological group emphasizes the diversity and diversity of both autochthonous and allochthonous representatives of the flora. Ecological analysis shows that landscapes are widely represented in Uzbekistan, found in deserted mountain steppes in black forest, juniper, semi-savannah and shilyak belts at altitudes up to 2500 m. 39 species of borage grow in these communities. On the territory of Uzbekistan, xerophytic and cryoxerophytic lines of evolution were noted in families - 119 species, with a slight participation of mesophytic and cryomesophytic - 14 species. The flora is dominated by biennial monocarpics and ephemera - 70 species and herbaceous polycarpics - 63 species.
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