Spontaneous occurrence of Cotoneaster lucidus Schltdl. in the town of Augustow (NE Poland)

Cotoneaster lucidus Schltdl., a potentially invasive alien plant in Poland, is reported from the town of Augustów for the first time (the ATPOL square: FB39). This is the second record of the species occurrence in north-eastern Poland. A new spontaneous population consists of 36 individual shrubs (groups of stems) dispersed on an area of about 0.2 ha, except one dense clump occupying an area of about 20 m². Phytosociological characteristics of the habitat is provided, and the potential threats are discussed.