The female gametophyte, also called embryo sac, is mostly a 7-celled and eight nucleated structure. The micropylar end of the central cell is occupied by the egg apparatus, comprising an egg cell and two synergids, and at its chalazal end three antipodal cells are present. Cells of the egg apparatus and the antipodal cells are uninucleate and haploid whereas the central cell is binucleate or diploid.