The center part of a flower is called the "pistil." The pistil is the female reproductive part of the flower and typically consists of three components: the ovary, style, and stigma. The ovary contains ovules, which develop into seeds upon fertilization. The style supports the stigma, which is the sticky surface that catches pollen during pollination. The pistil plays a crucial role in the plant's reproductive process, allowing for the exchange of genetic material with pollen from male parts (stamens). Understanding the function of the pistil helps in the study of plant biology and reproduction.