The female part of a flower consists of three structures: the stigma, style and ovary. The stigma is the sticky surface located at the top of the style, which is a long, slender tube-like structure. The ovary is located at the base of the style and contains one or more ovules. Together, the stigma, style, and ovary make up the female reproductive organ of the flower, called the pistil. When pollen grains land on the stigma, they begin to grow down through the style towards the ovary where they fertilize the ovules, leading to the formation of seeds.