Hammarbya paludosa (Orchidaceae), a new species for the Orenburg Region of Russia

The article reports the first finding of Hammarbya paludosa (L.) Kuntze in the Orenburg Region. The species was found in 2014 in the “Buzulukskiy Bor” National Park, in location called “Losinaya Pristan”, which represents a refuge for many extremely rare in the Orenburg Region boreal plants. This orchid was earlier mistakenly determined as Herminium monorchis (L.) R. Br. We recommend to include Hammarbya paludosa in the Red List of the Orenburg Region.