Kirillov Dmitry V. RussiaSyktyvkarInstitute of Biology of Komi Scientific Centre of the Ural Branch, Russian Academy of Sciences, 28 Kommunisticheskaya Str., Syktyvkar 167982, Russiakirdimka@mail.ru Author's articles Effect of Lighting Conditions on the Reproductive Success of Cypripedium calceolus L. (Orchidaceae, Liliopsida)