Dynamika populacji języcznika zwyczajnego Phyllitis scolopendrium (L.) Newm. w Ojcowskim Parku Narodowym w okresie ostatnich 30 lat

This paper describes the changes that have occurred in the structure of the hart’s-tongue fern population during the last 30 years. The two permanent sample plots were located in the strictly protected areas of Ojców National Park. The comparative analyses took into account the population size and distribution of individuals, the developmental stages of the common tongue, and the size of individual plants measured by both the length of the longest leaf and the number of leaves. The study also focused on the factors that limit or favour colonisation and population development.