The triploid nucleus divides forming a multinucleate cell. Cytokinesis then forms the membranes and wall that separate the nuclei. The first mitosis of the zygote forms the basal and the terminal cell. The basal cell forms the suspensor , the terminal cell forms the embryo. The embryo develops a root shoot axis with meristems at either end, as well as the protoderm, ground meristem, and procambrian.
Cotyledons begin to form as bumps on the embryo.
At maturity, the embryo stops growing and the seed dehydrates. The embryo is surrounded by the cotyledons, endosperm, or both. The integument forms the seed coat. The fruit develops from the ovary. The wall becomes the pericarp.