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Q.
Vexillary aestivation is characteristic of the family
AIPMTAIPMT 2012Morphology of Flowering Plants
Solution:
Vexillary or descending imbricate aestivation is a characteristic of family fabaceae. In it, the posterior largest petal (standard) overlaps two lateral petals (wings) which in turn overlap two anterior petals (keel). It is also called pailionaceous corolla.