This paper presents a survey of Bolboschoenus species found in Bosnia and Herzegovina and includes an identification key, distribution data and maps of localities for each species in Bosnia and Herzegovina based on a revision of herbarium specimens from SARA, private collections of the authors, literature data and field observations. The following species are native to Bosnia and Herzegovina: B. glaucus, B. maritimus and B. planiculmis. In this paper, B. planiculmis is reported as a species new to the flora of Bosnia and Herzegovina. It was discovered at two localities in August of 2015 and 2016 during field work along the banks of the river Bosna (East Central Bosnia). The paper presents a short morphological description and photographs, as well as a summary of distribution of the species. nema