TY JOUR TI PRELIMINARY ANALYSIS OF XEROPHYTE FLORA GEOGRAPHICAL ELEMENTS OF THE RUSSIAN CAUCASUS SEMIDESERT REGIONS KW flora KW chorological analysis KW geoelements KW phyto-chorions KW the Russian Caucasus JO Bulletin of KSAU AU Taysumov, M.A. AU Magomadova, R.S. AU Abdurzakova, A.S. AU Astamirova, M.A. AU Hasuyeva, B.A. AU Omarkhadzhiyeva, F.S. AU Satueva, L.L. PY 2013 IS PB Krasnoyarsk State Agrarian University