A population of Epipactis palustris in the Wielkopolski National Park near Łódź has been studied. In the paper ecological organization of a population of marsh helleborine was shown.
Epipactis palustris (L.) Crantz kruszczyk błotny to jeden z najbardziej zagrożonych gatunków storczyków w województwie dolnośląskim. Spośród 70 stanowisk podawanych z tego terenu przed 1945 rokiem obecnie istnieje jedynie 14. W artykule podano wykaz stanowisk historycznych i aktualnie istniejących oraz zagrożenia dla istniejących populacji
In the present paper a new locality of marsh helleborine (Epipactis palustris (L.) Crantz) on the administrative boundary of Poznan city and Koziegłowy village is described. It is on an artificially constructed railway enbankment, hence being a highly antropogenic location. The occurrence of this species on such untypical locality is shortly characterized.
In the present paper individual and group features as well as the environmental conditions of Epipactis palustris population from the nature reserve “Mielno” near Konin are described.
The aim of this study was to determine the current status of the population of marsh helleborine at a locality in the Wielkopolska National Park. Variability in generative shoots was analysed. Recorded results were compared with a study published in the 1990's, in which this locality was described. Since that time the area covered by that population has decreased; nevertheless, it exhibits characteristics of being in a good condition. In that population three forms of that species were reported: f. palustris, f. longibracteata and f. ochroleuca. The greatest threat for the existence of that heliophilous orchid was connected with the overgrowing of its habitat, for this reason measures should be taken to prevent succession and encroachment of trees and shrubs to that area.
The paper presents population structure of marsh helleborine on highly anthropogenic locality. The population was studied with respect to individual and group features, and its spatial and age structure was determined and discussed.