EN
Two stands of Cypripedium calceolus, situated in the area of Łuków forest complex have been noted in the borders of Południowopodlaska Lowland till now, however, in recent years they are not confirmed. A new locality of the species was recorded in 2007 in Bug river valley in Mierzwice environs in the area of the projected floristic reserve. Cypripedium calceolus occurs there at a slope of a little elevation in oak-hornbeam forest Tilio-Carpinetum typicum. Population is very small because it is composed of only two individuals. A new locality form a link between its stands in Lublin and North Podlasie region