ІСТОРІЯ ВИВЧЕННЯ ТА ОХОРОНИ РІДКІСНИХ СТЕПОВИХ ЕФЕМЕРОЇДІВ ЛІВОБЕРЕЖНОГО ПРИ-ДНІПРОВ'Я

The results of history of study and guard of rare steppe ephemeroids of Left-bank Pridniprov’ya are resulted in the article. Four periods and two stages which differ different directions are debeneesse selected. The first period (the middle of the XIX th – the end of the XIX th century) is characterized information about the separate locations of steppe ephemeroids, which found out during floral studies. In the third period (1970–2000) priority is sozologichniy direction of researches, next to floristichnim and fitocenotichnim; all together they were directed on an exposure and maintainance of new locations of rare steppe plants, brought to the first edition of the Red book of Ukraine (Crocus reticulatus Steven ex Adam, Bulbocodium versicolor (Ker. Gawl.) Spreng.), and also to the lists of plants which are guarded in the Poltava area (Bellevalia sarmatica (Pall. ex Georgi) Woronow, Hyacinthella leucophaea (K. Koch.) Schur, Muscari neglectum Guss. ex Ten.). The first stage (1970–1990) differs the new finds of Crocus reticulatus, Bulbocodium versicolor, Hyacinthella leucophaea (over 70 standards are kept in the funds of PW) and creation of a few botanical zakaznikiv, on initiative the Poltava botanists. Most of locations all five kinds was discovered in 90th (second stage) during optimization naturally commandment networks of the Poltava area. Most steppe areas with numeral population of rare steppe ephemeroides entered in the complement of naturally commandment networks (29 objects). The feature of fourth period (2000 till present time) is a lead through of complex botanical researches on existent and designed territories naturally commandment networks, in thereby establishment of population surveys is in LP, theoretical and practical developments in relation to reelecting of regional and national eko-networks