The natural range of distribution of Senecio inaequidens is South Africa. In Poland, the species was reported for the first time in 1987, from the main railway station in Katowice. It is currently classified as a potentially invasive epecophyte (i.e. recently introduced, numerous but confined to artificial habitats). In western Poland it was found in 10 new localities, each one in a different ATPOL square (10 km × 10 km). It is growing on roadsides, occurs often after road reconstruction, and on railway grounds without dense vegetation. The exception was a locality in Poznań, near Hetmańska Street, where coverage of the herb layer reached 95% (Fig. 1). The species has been observed there since 2012.