Question

explain floral aestivation​

Answer 1

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Aestivation or estivation is the positional arrangement of the parts of a flower within a flower bud before it has opened. Aestivation is also sometimes referred to as praefoliation or prefoliation, but these terms may also mean vernation: the arrangement of leaves within a vegetative bud.

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Answer 2

Answer :

Aestivation -

• It is the mode of arrangement of sepals for petals in floral but with respect to other members of the whorl.
• The main types of aestivation include :

1. Valvate aestivation
2. Twisted aestivation
3. Imbricate aestivation
4. Vexilliary aestivation

• If the petals or sepals whorl around and not touch each other at the margin, then they are said to be in velvate aestivation.
• If the petals or sepals overlap each other, then they are said to be in twisted aestivation.
• If the petals or sepals overlap each other but not in particular direction, theb they are said to be in imbricate aestivation.
• If the petals or sepals which turn and overlap each other and there are two lateral and two smallest anterior petals then they are said to be in vexilliary aestivation.
• The Example for velvate aestivation include : Calotropis.
• The Example for twisted aestivation include : China rose.
• The Example for imbricate aestivation include : Cassia.
• The Example for vexilliary aestivation include : Pea.