The bottom of the pistil contains the ovary and the narrowed region in between is called the style . The male contribution or pollen is produced in the anther, and seeds develop in the ovary. Many of the fruits we eat are the thickened ovary walls surrounding the seeds. Not only does the flower contain the sexual parts necessary for reproduction, they are also like flashy roadside billboards advertising a rich supply of nectar and pollen ready and waiting for pollinating insects and other creatures. That is the bargain offered.
Pollination is simply the transfer of pollen grains from an anther to a stigma.
Fertilization occurs much later when the pollen grains germinate on the stigma and send down a pollen tube which releases the sex cells to fertilize the ovules. After fertilization, the ovules become the seeds, and the ovary wall becomes the fruit. The sexual nature of flowers and the role of the many forms, colors and scents in attracting pollinators was discovered in 1759 by Arthur Dobbs. Flowering plants that have a condensed shoot tip specialized for reproduction. The bright yellow sacs that produce and contain the pollen grains.