The studies were carried out in 1994-1995 on the permanent grassland in the central area of the Masurian Landscape Park. Braun-Blanquet method was used. The selected documental material represents 26 phytosociological records. Two plant associations were chosen and described in the paper: Cirsio-Polygonetum and Lolio-Cynosuretum.
The differentiation of the subassociation Molinietum caeruleae cirsietosum rivularis into three variants: typicum, with Carex davalliana, and with Sanguisorba officinalis is presented. A list of new localities of 16 regionally rare species of vascular plants, e.g. Iris sibirica, Gladiolus imbricatus, Trollius europaeus, recorded in 1999–2001 in the north part of the Silesia province is published.