Flower structures are the parts of a flower that play essential roles in reproduction. The main components include the petals, which attract pollinators with their colors and scents, and the sepals, which protect the flower bud before it blooms. The reproductive parts consist of the stamens, which produce pollen, and the pistil, which contains the ovary where seeds develop. In addition to these primary structures, flowers may also have nectaries that produce nectar to attract pollinators. The arrangement and shape of these structures can vary widely among different species, contributing to the diversity of flowers found in nature.