In the paper 21 new localities of Artemisia abrotanum in Lower Silesia are presented. Most of them are situated within the Wrocław area. The species has a synanthropic origin and is represented, on the studied area, by di- and tetraploid forms. In most cases, the plants on their sites are represented by tetraploids. Only one diploid specimen was noted. This may suggest the extension of the distribution by a polyploid form of the species.