NEET BIOLOGY

Detailed explanation-1: -Aestivation is arrangement of accessory floral organs in relation to another floral bud. When the margins of sepals and petals overlap without any specific direction its is imbricate aestivation. Examples of imbricate aestivation are gulmohar and cassia.

Detailed explanation-2: -Aestivation is the arrangement of accessory floral organs (sepals or petals) in relation to one another in floral bud. It may be of valvate, twisted, vexillary or imbricate type. In imbricate aestivation, there is an irregular overlapping of petals and sepals by one another.

Detailed explanation-3: -Vexillary aestivation is a special type of aestivation. In valvate aestivation margins of adjacent petals or sepals touch each other at the margin without overlapping.

Detailed explanation-4: -Valvate-It is called valvate, such as Calotropis, when the margins of the sepals or petals do not overlap each other.

Detailed explanation-5: -Example: Imbricate aestivation occurs when the margins of petals or sepals overlap in any orientation. This kind of aestivation can be seen in Gulmohar, Cassia, and legumes.