ANATOMICAL STUDIES IN SOME SPECIES OF BROMUS L. (POACEAE) IN IRAN

In this paper the leaf structure of 25 Iranian species of Bromus in Iran have been anatomically examined. Eighty one characters were selected for variable and constant species characters. Among them 28 characters are variable in different localities, 40 characters constant in all species (even in different localities) and 13 characters variable between species which these characters have taxonomical value and can be used for distinguishing between species. Based on the study, annual and perennial species are separated in two groups. In this paper, in addition to providing a list of variable and constant species characters, tables showing the species distinguishing characters as well as anatomical photos of the species is presented.