Corolla of Five Petals with Vexillary Activation
A corolla of five petals with vexillary activation refers to a specific floral arrangement where the corolla, or the inner whorl of flower petals, consists of five petals that are arranged in a specific manner known as vexillary activation.

Corolla of Five Petals:
- In this arrangement, the corolla of the flower consists of five petals. This is a common floral pattern found in many plant species.

Vexillary Activation:
- Vexillary activation is a term used to describe the specific arrangement of petals in a flower where one petal, known as the vexillum or banner, is larger and stands upright, while two lateral petals, known as wings, are positioned to the sides, and two lower petals, known as keel petals, are fused together to form a boat-shaped structure.

Explanation:
- This floral arrangement is often seen in flowers of the Fabaceae family, also known as the legume or pea family. One of the most well-known examples of a flower with a corolla of five petals with vexillary activation is the pea flower (Pisum sativum).

Significance:
- The arrangement of petals in a corolla of five petals with vexillary activation plays a crucial role in the reproductive process of the flower. It helps in attracting pollinators, such as bees and butterflies, and facilitates the transfer of pollen for fertilization.
In conclusion, a corolla of five petals with vexillary activation is a unique floral arrangement that can be observed in various plant species, particularly those belonging to the Fabaceae family. This arrangement serves an important function in the reproductive cycle of the flower and contributes to its overall beauty and attractiveness.