New data on the distribution of Spiranthes spiralis (L.) Chevall. (Orchidaceae, Asparagales) in Eastern Bulgaria

. For the first time Spiranthes spiralis (L.) Chevall. family Orchidaceae has been proven for the floristic region of Northeastern Bulgaria. It is considered a rare species of the flora of Bulgaria and is included in Appendix III to the Law on Biological diversity as a protected species. Regarding the light regime, it is a typical heliophyte, preferring open habitats and welllit ecological niches. In October 2022, we discovered a new deposit of the species on the territory of the protected area Provadiysko - Rojaksko plateau, between the villages of Dobrina and Staroselets, municipality of Provadia, which is the first deposit for Northeastern Bulgaria. The population is represented by single specimens distributed in a meadow on the periphery of forest massifs and shrub communities, and the habitat is characterized by a rich floristic diversity. Undoubtedly, studying the population characteristics of this species is important for its protection.