The following components make up a flower:-The stigma, a style, and an ovary constitute the gynoecium. The ovary is present at the base of the flower. Style rises from the ovary and has a pollen-receptive surface called a stigma.One or more filaments make up the androecium. The paired anthers that make up each stamen are each attached to a filament that bears pollen.The flower's reproductive parts are surrounded by petals, which are modified leaves.The bottom or outermost portion of a flower is called a sepal.