Rodzaj Rosa (Rosaceae) na Wysoczyźnie Ciechanowskiej

On the basis of the herbarium collection gathered between 2005 and 2008 in the geo- graphical mesoregion of the Ciechanowska Upland, 156 sites of nine species of the genus Rosa were reported. Among the taxa that were found six were native species: R. canina, R. dumalis, R. sherardii, R. rubiginosa, R. inodora, R. villosa, while three species were antropophytes: R. gorenkensis, R. rugosa, and R. multifl ora.