Ornithogalum boucheanum (Asparagaceae) in Eastern Europe: Native and synanthropic range, habitat conditions and state of population

The geographical distribution, ecological and coenotic features of the place growth age structure Ornithogalum boucheanum populations in Ukraine have been studied. In total, during entire period floristic research Ukraine, 263 native sites this species were recorded 13 administrative regions (oblasts). Mostly these are concentrated Steppe zone, where main part Eastern European fragment general natural range O. is represented. For other isolated reports known. It noted that addition to reduction number habitats within Forest-Steppe southern Polissya, a secondary adventive habitat formed, it immigration group foreign taxa. was found characterized by certain stenotopy, as needs some moisture more common valley balka landscapes most often large river basins, which not prone drying out can be favourable corridors for long-distance migration. Favourable conditions exist floodplain riparian forests, sufficient moisture, little competition from grass amount light spring. addition, successfully master artificial synanthropic groups tree species, particular being widespread Robinia plantations. different numbers: with an area 4–6 hectares, there tens hundreds thousands individuals, small on northern border Kirovohrad Kharkiv oblasts, young invasive character. possible modern spread transition zone between Steppe, process forming new taking here.