EN
The vascular flora of the Szczawin forest complex was studied from 2007 to 2011. The results were compared to those of a previous study carried out from 1971 to 1976. The Szczawin forest complex is located north-east of Zgierz in central Poland. It contains the Grądy nad Moszczenicą nature reserve, which was established to preserve the oak-hornbeam forests with their rare protected plant species. There have been large changes in the 35 years since the first study. Currently, 307 plant species are found in the area. However, only 68% of the species found in the first study were found again in the second study. Of 22 protected species found in the first study, only 10 were found in the second. The share of alien species has also increased. With regards to native species, the share of non-forest native species has increased.