Describe sexual reproduction in plants

Reproduction in plants takes place sexually and asexually as well. But the majority of the flowering plants reproduce sexually. The flower is the reproductive part of a plant i.e., both male and female gametes are produced by flowers. Sexual reproduction in plants takes place in flowers. The complete flower typically consists of four parts:
Petals
Sepals
Stamen (male reproductive part)
Pistil/Carpel (female reproductive part)
Stamen (male reproductive part) consists of anther and filament.
The anther is a sac-like structure that produces and stores pollen.
The filament supports the anther.
Pistil (female reproductive part) comprises of three parts- stigma, style, and ovary.

Stigma is the top most part of a flower.
The style is the long tube which connects stigma to the ovary.
The ovary contains a lot of ovules. It is the part of the plant where the seed formation takes place.
A flower may consist of either stamen or pistil or both. Based on this, a flower can be either unisexual or bisexual. A bisexual flower is composed of all the four parts mentioned above, e.g. Rose, China rose. Whereas, plants like papaya and cucumber produce only unisexual flowers.

Giga is the second highest prefix on the normal scale, the first is terra.