Rose has strong scent, osmanthus is sweet, orchid is fresh. Why the flowers could send out scent？
Flowers have a kind of cell called eleocyte filled with fragrant oil. Different flowers produce different fragrant oil, so they smell different. This oil would volatilize into the air with water, especially when the sunlight is strong, the fragrant oil could volatilize fast and the fragrance would be denser.
We don’t have to worry that the fragrant oil would be fully volatilized, because it could be produced constantly. It could not only reduce the water lost, but also attracts insects to gather honey and pollinate。
Flowers with bright color usually smell not dense. They always attract insects by their bright colors during their evolution, so they don’t have to send out fragrance.
As for those small flowers without bright color, they have strong fragrance, because they have to attract the insects by their fragrance.
Have a Think
The eleocyte in the flower would secrete ( ).
A. aromatics B. potpourri C. aromatic oil