A group of closely related species from the section Bromus: B. secalinus, B. commutatus and B. racemosus were described by characteristics of the abaxial epidermis of lemma. B. commutatus appeared as the most extreme unit against other types. B. secalinus exhibited an intermediate nature between commutatus and racemosus morphs. Many interspecific forms of putative hybrid origin were also put in an ordination space as intermediates.