Give an account on Helobial endosperm.

Explanation

Helobial endosperm : Primary Endosperm Nucleus moves towards base of embryo sac and divides into tow nuclei. Cell wall formation takes place leading to the formation of a large micropylar and small chalazal chamber. The nucleus of the micropylar chamber undergoes several free nuclear division whereas that of chalazal chamber may or may not divide.
Example : Hydrilla and Vallisneria.