The recommended answer is sheer nonsense. As we know, flowers are divided into wind-borne flowers and insect-borne flowers. Osmanthus fragrans is an insect-borne flower, but its shape is not attractive enough to insects, so it will produce a great aroma to attract insects. Why? Because osmanthus also needs to breed, it needs to be fertilized by pollen stuck to insects to a great extent. By the way, Osmanthus fragrans is a dioecious plant, and it is impossible for it to perform cleistogamy function by itself.