Morphology of uredinia and urediniospores of the fungus Melampsora larici-epitea Kleb. a damaging pathogen of common osier (Salix viminalis L.) in Poland
Morfologia urediniów i urediniospor grzyba Melampsora larici-epitea Kleb. - groźnego patogena wierzby wiciowej (Salix viminalis L.) w Polsce