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B
Vexillary
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C
Rosaceous
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D
Mimosaceous
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Solution
The correct option is B Vexillary The descending aestivation is also called as Vexillary aestivation. It is a striking feature of the family Papilionaceae. There are five petals in the corolla. The bigger petal is called standard and it overlaps the lateral petals, also called the wings. These wings then overlap the smaller petal called the keel. The overlapping occurs on the descending order of the size of the petals.