<P> Nuclear endosperm formation - where repeated free - nuclear divisions take place; if a cell wall is formed it will form after free - nuclear divisions . Commonly referred to as liquid endosperm . Coconut water is an example of this . </P> <P> Cellular endosperm formation - where a cell - wall formation is coincident with nuclear divisions . Coconut meat is cellular endosperm . Acoraceae has cellular endosperm development while other monocots are helobial . </P> <P> Helobial endosperm formation - Where a cell wall is laid down between the first two nuclei, after which one half develops endosperm along the cellular pattern and the other half along the nuclear pattern . </P> <P> The evolutionary origins of double fertilization and endosperm are unclear, attracting researcher attention for over a century . There are the two major hypotheses: </P>

Endosperm of gymnosperm is ontogenetically similar to angiospermic