Three-lobed Coneflower Rudbeckia triloba L. (Compositae): new alien species in the flora of Bosnia and Herzegovina

Sa？etak Three-lobed Coneflower Rudbeckia triloba L. was discovered in September 2016 during fieldwork on the banks of the Krivaja River in the vicinity of village Ribnica near Zavidovi？i (Central Bosnia). Three-lobed Coneflower is native in North America but it has been introduced to some areas beyond its natural range. This is the first record of this species for Bosnia and Herzegovina. The paper presents a short morphological description and photographs of the species based mainly on the collected specimens, as well as the distribution of the taxon. A determination key is given for Rudbeckia taxa registered in Bosnia and Herzegovina and neighbouring countries