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Question

Vexillary aestivation is found in

A
Rosaceae
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B
Cruciferae
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C
Cucurbitaceae
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D
Papilionaceae
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Solution

The correct option is B Papilionaceae
Vexillary aestivation is the arrangement of corolla in which the anterior petal is innermost and posterior petal is outermost and largest. It is also called as descending imbricate. Papilionaceae flower shows vexillary aestivation. There is large petal which has two lobes fused. There are two wings and one small keel or carina.
Sepals of Rosaceae shows valvate aestivation in which sepals are present in a whorl and just touch one another at margin without overlapping.
Cruciferae has 4 sepals in two whorl of two each in imbricate aestivation.
Cucurbitaceae corolla is in valvate aestivation in which sepals are present in a whorl and just touch one another at margin without overlapping.
Therefore, the correct answer is option D.

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