Motronyuk O. Features geographical distribution the ecology-cenological differentiation of species of Euphorbiaceae Juss. the flora of Ukraine.

This dissertation is dedicated to the research of issues regarding Euphorbiaceae Juss. family, peculiarities of its geographical distribution, and biological, ecological, and coenotic peculiarities of its representatives spread in Ukraine. Basic researches aimed at definition of taxonomic composition of the Euphorbiaceae family and its specific genera and the family system elaboration have been analyzed. Reasoning from the analysis of the literature data on morphological, anatomical, carpological, chemotaxic and paleobotanic research of the Euphorbiaceae species we herein find necessary to single out 7 genera within its structure: Securinega Comm. ex Juss., Ricinus L.; Chrozophora Adr. Juss.; Acalypha L.; Andrachne L.; Mercurialis L.; Euphorbia L. (54 species, 2 cultivar types , 2 hybrids, endemic element consists of 19 species). Polycarpics have been proven to dominate among the Euphorbiaceae family representatives in question. Spurge family constitute permanent components of the natural cenosis, partially synanthropic, and are present in all areas and regions of Ukraine, although the number of species is gradually reduced from the south to the north. The species of the Eurasian, European and Mediterranean latitudinal habitats have been ascertained to dominate. The paper is based on more than 1700 geobotanical descriptions performed in preserved areas, forests, meadows, steppes, meadow-steppe slopes, rocky taluses, salinized soil, limestone taluses, river banks and seashores, parks, sylvan parks, ruderal ecotopes, inhabitable areas, vegetable gardens, and alongside roads etc. A classificatory vegetation schedule with representatives of the Euphorbiaceae family, including 96 syntaxons (associations, sub-associations, variants) pertaining to 55 unions, 33 orders and 23 classes on the principle of ecological-and-floristic classification has been developed.