An analysis of the characters of Bromus racemosus L., B. commutatus Schrad. and B. secalinus L. (Poaceae).
The characters currently used to distinguish Bromus racemosus, B. commutatus, and B. secalinus are analysed. The lengths of the spikelets, lemmas, anthers and rhachillas and the shape of the lemma margins were found to be often unreliable. Two more diagnostic characters are proposed to separate B. racemosus from B. commutatus. The characters of B. secalinus are discussed. A new key for these species is proposed.