Some comments on the species of Bromus sect. Bromus (Poaceae) in Iran. – Iran. J. Bot. 18 (2): 226-230. Tehran. This article is a taxonomic review after Flora Iranica concerning some species of Bromus sect. Bromus. Comparing the holotype, isotype and paratype of B. pseudobrachystachys with the lectotype of B. brachystachys and also reexamination of three Iranian and Iraqi herbarium sheets putatively determined under the latter’s name showed all belong to the former. B. racemosus, B. arvensis and B. secalinus are confirmed to occur in Iran. Despite B. tigridis was identified from Turkey based on the sheet Sorger & Buchner 82-62-54, the Iranian specimen was identified as B. racemosus. Furthermore, a new record of this section i.e., B. macrocladus is reported here from mountains of Razi village (W Khoy, NW Iran). Reza Naderi (correspondence <rezanaderia@yahoo.com>) and Mohammad Reza Rahiminejad, Department of Biology, University of Isfahan, Isfahan, Iran. Introduction Bromus L. is a complex genus that encompasses 150 annual to perennial species (Clayton et al. 2002 onwards). Within Bromus, section Bromus is considered as the most advanced section and probably originated during the Pleistocene in SW Asia and the Mediterranean region (Stebbins 1981). Most species of this section grow in field margins, roadsides and disturbed habitats so that human activities had a determinant effect on their evolution. Taxonomic problems of some species cause workers to confuse and harden their determination. Taxa are differentiated only by arbitrary characters, however, the number of species in section Bromus is variable from 30 to 40 species (Saarela et al. 2007). Following the publication of Flora Iranica (Bor 1970) some new changes occurred in section Bromus (see Table 1). This study aims to evaluate the taxonomic changes made to and clarify the correctness of the new taxa for the flora of Iran. In addition, a new species of section Bromus is reported here.