Types of Pollination
Self-pollination
Self-pollination takes place when the pollen grains fall from the anther to the stigma of the same flower in the same plants. This usually occurs in a perfect flower, which contains both the pistil and the stamen.
Cross-pollination
Cross-pollination involves the transfer of pollen grains from the anther of a flower to the stigma of another flower of the same plant or another plant. Cross-pollination occurs in imperfect flowers that either have only a pistil (female reproductive part) or only a stamen (male reproductive part). Cross-pollination is facilitated by the sweet scents and brightly colored petals of flowers that attract insects. Insects like bees and butterflies land on the flowers to suck a sugar-rich liquid called nectar. The pollen grains stick to the body of the insects and are transferred to other plants when the insects alight on their flowers.
