Question

Vexillary aestivation is characteristic of

• A. Mimosoideae
• B. Caesalpinoideae
• C. Papilionaceae
• D. All of the above

Answer 1

The correct option is C Papilionaceae

The family Papilionaceae show vexillary aestivation. Aestivation or aestivation refers to 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 that is the arrangement of leaves within a vegetative bud. In vexillary aesivation the petals are five in number in which one is superior and posterior. It is biggest of all petals and is called as vexillum, other two are laterally arranged and overlapped by vexillum. The rest two are inferior and interior.

Therefore, the correct answer is option C.