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Communities of the Scheuchzerio-Caricetea nigrae class in the Opole Plain. Fragmenta Floristica et Geobotanica Polonica 11(2): 319–335. Kraków. PL ISSN 1640-629X. ABSTRACT: This paper presents the environmental conditions, floristic structure and distribution of the 6 associations and 1 community of the Scheuchzerio-Caricetea nigrae (Nordh. 1937) R. Tx. 1937 class in the Opole Plain (SW Poland).