Dynamics and systematic position of Thelypteridi-Phragmitetum Kuiper 1957

The author discusses the arising of Thelypteridi-Phragmitetum phytocenoses, their place in the zonal vegetation pattern and in plant succession. The diagnostic value of Dryopteris thelypteris and the syntaxonomic position of Thelypteridi-Phragmitetum are explained. This association is classified to the alliance Phragmition. A synthetic table is given with 480 phytosociological records representing the association studied, and a map of distribution of its sites or groups of sites reported to date in Poland