Which part of the flower contains the female reproductive structures? 

The gynoecium is the innermost whorl of the flower and is composed of the pistil(s), which are the female reproductive structures that include the ovary, stigma, and style. The pistil includes the ovary, which contains the ovules and will develop into the fruit after fertilization, the stigma, which is the sticky, receptive part where pollen germinates, and the style, which is the stalk that connects the stigma to the ovary. The gynoecium is a crucial component of the flower and plays a central role in the plant's reproduction.