The present study provides a detailed description of ecological features, phytochemical analysis, morpho-physiological traits, anatomical features and ultrastructure characteristics as well as biochemical aspects of yielded grains of three species of genus Echinochloa in the Nile Delta of Egypt. The sampled stands are distributed in the northern part of the Nile Delta region of Egypt which covers the north and middle limits of four Governorates namely: El-Dakahlia, Damietta, Kafr El-Sheikh and El-Behira. The results indicated that, the total number of weeds recorded in the study area is...