EN
The object of the research was flora of four anthropogenic ponds formed in the Polder nature reserve. Flora consists of 172 taxa, including 3 pteridophytes and 1 gymnosperm. 97% are native species classified as apophytes. 154 taxa are species of diagnostic value of 18 phytosociological classes; species of the Molinio- Arrhenatheretea and Phragmitetea australis classes dominate. 23 species (13% of flora) are undoubtedly new on researched area and their propagules were transported by birds. 5 species are protected by low, 2 are threatened of extinction in Poland and 9 are included into a regional red list of Lower Silesia. Ponds forming had the small influence on the local biodiversity, but new species are valuable and should be actively protected.