Puccinia scirpi – first finding of the fungus in the uredinial stage and new notes of the aecial and telial stages in Poland

Puccinia scirpi causing the flowering rust disease on Nymphoides peltata and Schoenoplectus lacustris was recorded in 2018 from Bolestraszyce Arboretum near Przemyśl (Subcarpathian Voivodeship, Poland). The occurrence of theheteroecious rust species in the aecial (stage I), uredinial (stage II), and telial (stage III) stages are reported, and morphological descriptions, illustrations, and microphotographs are shown in the current study. Tis is the second report on the fungus in the aecial stage since the end of the 19th century, the first report on the uredinial stage, and the ninth description of the telial stage in Poland.