New data on the distribution and community ecology of the rare hygrophytic fern Thelypteris palustris in Bulgaria.

Marsh Fern (Thelypteris palustris) is a hygrophytic plant uncommon to the flora of Bulgaria. It is also a vulnerable species, with small and isolated localities in several parts of the country. This paper provides new data on syntaxonomy of the communities in which this fern participates, as well as on a new important locality near Pleven town, Danubian Plain. The paper also attempts to summarize the published and more recent information on the distribution of this species in Bulgaria. [ABSTRACT FROM AUTHOR]