Petrova Nadezhda A. RussiaSaratovBotanical Garden of Saratov State University, Navashina Str., Saratov 410010, Russiakashinas2@yandex.ru Author's articles SOME ECOLOGICAL PECULIARITIES OF BULBOCODIUM VERSICOLOR (KER-GAWL.) SPRENG. (COLCHICACEAE, MAGNOLIOPHYTA) IN THE LOWER VOLGA REGION