Occurrence of Rosa blanda ait. (Rosaceae) in Poland.
The article presents the Smooth rose, Rosa blanda Ait. distribution in Poland based on literature data, avail-able herbarium materials, and shared unpublished data. R. blanda is a North American species that is cul-tivated and has become wild throughout Poland, where it has the status of a domestic, non-invasive keno-phyte is species is rare in Poland. Only 22 sites have been identified (mainly in the central and northwest-ern part of the country), as created spontaneously or as remaining from old, local cultivations. However, it cannot be excluded that this species will become invasive in the future and will negatively ect native ora species, especially through its ability to cross with other rose species (including invasive R. rugosa Thunb.).