Arrangement of sepals or petals with respect | vedclass

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(C) Aestivation: The mode of arrangement of sepals or petals in floral buds with respect to other members of the same whorl is known as aestivation.Ma

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Aestivation

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(C) Aestivation: The mode of arrangement of sepals or petals in floral buds with respect to other members of the same whorl is known as aestivation.Main types of aestivation are:$(i)$ Valvate: When sepals or petals in a whorl just touch one another at the margin without overlapping,e.g.,$Calotropis$.$(ii)$ Twisted: If one margin of the appendages overlaps that of the next one and so on,e.g.,China rose,cotton,lady's finger.$(iii)$ Imbricate: If the margins of sepals or petals overlap one another but not in any particular direction,e.g.,$Cassia$ and $Gulmohar$.$(iv)$ Vexillary: In pea and bean flowers,there are five petals; the largest (standard) overlaps the two lateral petals (wings) which in turn overlap the two smallest anterior petals (keel). This type of aestivation is known as vexillary or papilionaceous.

Arrangement of sepals or petals with respect to the other members of the same whorl is known as

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