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<i>Rumex confertus</i> is one of the alien species vigorously entering native meadow as well as ruderal communities in major river valleys. In about a hundred years the species invaded almost the whole territory of Poland. Many reports stating that Russian Dock may reach high coverage in various phytocoenoses contradict those of its low generative reproduction efficiency. In communities where it most frequently occurs, germination is hindered by the lack of empty spaces. In such conditions thedoi:10.5586/aa.2006.064 fatcat:4gnbchveijcd7k3nmfpwnax6ke