Abstract: The micro-morphology of leaf lower epidermis for 9 species(beloging to 5 genera) of the tribe Triticeae from Shandong were examined under light microscope(LM).It is considered that the micro-morphological characters of leaf lower epidermis could be used as evidence to distinguish genera because they are obviously different among the genera in this tribe.In addition,5 species of Roegneria may be divided into two types based on the micro-morphological characters of leaf lower epidermis,and it is in agreement with the classification into sect.Roegneria and sect.Cynopoa by its external characteristics.