Question

different timings of maturation of androecium and gynoecium

Answer 1

zygote. diffusion of eggs

Answer 2

 The gynoecium is the innermost whorl of (one or more) pistils in a flower and is typically surrounded by the pollen-producing reproductive organs, the stamens, collectively called the androecium. The gynoecium is often referred to as the "female" portion of the flower, although rather than directly producing female gametes (i.e. egg cells), the gynoecium produces megaspores, each of which develops into a female gametophyte which then produces egg cells.

The term gynoecium is also used by botanists to refer to a cluster of archegonia and any associated modified leaves or stems present on a gametophyte shoot in mosses, liverwortsand hornworts. The corresponding terms for the male parts of those plants are clusters of antheridia within the androecium.

Flowers that bear a gynoecium but no stamens are called pistillate or carpellate. Flowers lacking a gynoecium are called staminate.

The gynoecium is often referred to as femalebecause it gives rise to female (egg-producing) gametophytes, however, strictly speaking sporophytes do not have a sex, only gametophytes do.[1]

Gynoecium development and arrangement is important in systematic research and identification of angiosperms, but can be the most challenging of the floral parts to interpret.[2]