Lavrentiev M. V. RussiaSaratovSaratov State University, 33 Astrakhanskaya Str., Saratov 410012, Russiamihaillavrentev@yandex.ru Author's articles HABITAT AND ADAPTATION CHARACTERIZATION OF HEDYSARUM GRANDIFLORUM PALL. (FABÁCEAE, DICOTYLÉDONES) IN THE SOUTHERN VOLGA UPLAND