The center part of a flower is called the pistil, and it includes three parts: the stigma, style and ovary. The pistil is considered the female part of the flower because it produces the fruit of the flower.
The stigma is at the top of the pistil, and it is usually flat and sticky. The style is a thin tube that connects the stigma to the ovary. The pistil is surrounded by the stamen, which is the male part of the flower. The stamen gives off pollen that travels down the style of the pistil to reach the ovary for the fertilization process.