The aim of the study was to investigate the detail epidermal characteristics of the leaf for six species of the genus Lepidium in Iraq. The species investigated include L. aucheri, L. latifoliaum, L. perfoliatum, L. persicum, L. ruderale and L. sativum. The qualitative parameters, such as straight or sinuous, thin or thick anticlinal cell walls, types of stomata apparatus and trichomes types were studied by using light microscopy (LM). Also quantitative traits such as stomtal index, length, width, epidermal length and width was described in details. The results show high covariance in the leaf attributes which can be of great taxonomic significance.