Do All Flowers Have a Fragrance?

As mentioned before, not all flowers have a fragrance. Some flowers even en-tit an unpleasant smell. For instance, if you crumple a cordate houttuynia, it smells like fish. When odours like this spread into the air, they can protect plants from attack by certain insects. On the other hand, the smell of some flowers can attract certain insects, which will then carry pollen to female flowers, enabling the plants to bear rich fruits.