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In each of these whorls are one of four organs, including petals, sepals, stamens, and pistils. Petals and sepals do not play an active role in the reproductive process. Stamens and pistils, the flower's male and female reproductive organs, do aid in reproduction.
Female Parts. The ovary and other female parts of the flower lie in the main structure, called the pistil. This is a long tubular organ. The stigma is where pollen is collected and it at the top of the pistil. In the middle is the style. This is the section that the pollen travels down to the ovary. The ovary lies at the bottom of the blossom.