![](https://prachtorchideen.wordpress.com/wp-content/uploads/2020/11/20201103_1317011.jpg?w=574)
In Phaius subtrilobus a striking change in ovary colouration can be observed. The ovary of a non-pollinated Phaius subtrilobus flower is pure white (see picture above). If the flower is not pollinated, the flower will decay without any change of its ovary colour.
![](https://prachtorchideen.wordpress.com/wp-content/uploads/2020/11/20201103_1320421.jpg?w=575)
Pollination and subsequent fertilization will result in a remarkable change of Phaius subtrilobus ovary colour. With time more and more chlorophyll is synthesized in the seedpod (ovary) of a fertilized Phaius subtrilobus flower. What is the use of chlorophyll synthesis in ripening seedpods of Phaius subtrilobus? Do you have an idea?