Question

Describe vexillary aestivation with a suitable example.

Answer 1

Aestivation:

1. Aestivation is the arrangement of sepals or petals in a floral bud in relation to other members of the same whorl.
2. There are four kinds of aestivation including valvate, twisted, imbricate, and vexillary.

Vexillary aestivation:

1. Vexillary aestivation is a distinctive arrangement in which one giant petal covers the other smaller petals.
2. The vexillum is the bigger petal, while the wings are the two bent petals that are laterally positioned.
3. The two innermost, boat-shaped petals are known as keels in this location.
4. Example: Bean flower.

Diagram: