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.
This study presents information on a new to Poland synanthropic species - Aronia ×prunifolia (purple chokeberry).Purple chokeberry is cultivated worldwide as a fruit and decorative plant. In various regions of the world the process of its naturalisation outside the places of cultivation has been observed. In Europe, it is visible, among others, in Holland and Germany. In Poland, the first case was recorded in the "Bagna" bog complex near Chlebowo (Wielkopolska region). In this study, the distribution of Aronia ×prunifolia in Poland has been presented (square ATPOL BC67, BC68) as well as its spread and conditions of occurrence.
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