چكيده لاتين :
In the present study, 28 species of Bromus L. have been investigated based on micromorphological characters of abaxial surface. The lamina of grass leaf blades is divided into costal and intercostal zones. The results of this study showed that the costal zone includes short and long cells and probably hair and prickle and the intcrcostals zone includes long cells, stomata and hairs. They are similar and constant in all species. But indumentum types are different in species. Also the characters of indumcntum have taxonomical value and can be used in distinguishing of species.
