Question

The given figure represents vexillary aestivation. Select the suitable labels for P, Q and R.

• A.

  P	Q	R
  Standard	Wing	Keel

• B.

  P	Q	R
  Standard	Keel	Wing

• C.

  P	Q	R
  Wing	Keel	Carina

• D.

  P	Q	R
  Standard	Keel	Carina

Answer 1

The correct option is A

P	Q	R
Standard	Wing	Keel

In vexillary/descending imbricate aestivation, the posterior petal (standard) overlaps the two lateral petals (wings or alae) and the latter overlap the two anterior petals (keel or carina). It is also called papilionaceous corolla and is found in members of Family Papilionaceae.