Abstract
In the course of the research, two species of orchids, i.e. Cephalanthera longifolia (L.) Fritsch and Epipactis helleborine (L.) Crantz have been found to appear in large quantities in poplar monoculture Populus xcanadensis in the Krzyżowe Hills (Lower Silesia, Poland). No data on sword-leaved and broad-leaved helleborine occurrence in such habitats in Lower Silesia have been published so far. Based on the list of species accompanying Cephalanthera longifolia and Epipactis helleborine, the habitat analysis has been conducted by means of Ellenberg's ecological indicator values. For the first time Cephalanthera longifolia is reported in Populus xcanadensis monoculture in Poland.
References
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© by Adam Mickiewicz University, Poznań, Poland, Department of Plant Taxonomy, 2006
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