How 'Order Parietals' got its name ?

 The order Parietales (an older botanical classification order, used in Bentham & Hooker’s system) gets its name from the word parietal, which comes from the Latin paries meaning "wall."

In these plants, the ovules (the structures inside the ovary that develop into seeds) are attached to the walls of the ovary rather than to a central column or a basal part. This type of ovule arrangement is called parietal placentation.

So, the order was named Parietales because its members show parietal placentation (ovules attached along the inner wall of the ovary).

👉 Example plants: Papaya, Passionflower, Cucumber, Mustard, etc.