Check out this young lily bud. As it grows, you'll see the pink color develop thanks to light temperature and the flowers' genetics. The opening of the bud is helped along by a hormone called oxen, allowing the petals to expand and display the lilies' reproductive structures. Stamins and pistol. With the flower fully open, mature Stamins release pollen while the stigma is ready to receive it. Insects, like the bees here, aid in pollination, transferring pollen from anther to stigma. This leads to fertilization and seed formation for the next lily generation. This video shows how nature's simplicity often masks complexity.