In April 2014, a new locality of Salix myrtilloides was found in the eastern part of Kampinos National Park in the abandoned village of Wyględy Górne (Leszno municipality, Warszawa Zachód District; GPS: 52°17′35.4″N, 20°41′41.5″E). The population consisted of 17 stems scattered in an area of 30 m2 within a poor fen that developed between small dunes. The main threat to the species at this locality is the poor quantity of these plants, which makes the population susceptible to sudden changes in environmental conditions. Another threat is biocenotic succession and the associated increase in shading from shrubs and perennials.