Flora and vegetation of nature reserve “Bór na Czerwonem” in the Kotlina Orawsko Nowotarska Basin (Western Carpathians). Fragmenta Floristica et Geobotanica Polonica 10: 67–91. Kraków. PL ISSN 1640 629X. ABSTRACT: The paper presents results of geobotanical studies on the “Bór na Czerwonem” nature reserve situated in the Kotlina Orawsko Nowotarska basin (Western Carpathians, S Poland) at an altitude of 609–622 m a.s.l., on fluvioglacial talus of the Tatra Mts origin. A considerable part (45 ha) of the reserve constitutes a raised peat bog. During research, 10 plant associations were distinguished (using Braun Blanquet method). The most interesting of them are: Pino × rhaeticae Sphagnetum of the raised bog and Calamagrostio villosae Pinetum of the neighbouring forest.