Question

Select the correct option for A, B and C in the given diagram of papilionaceous corolla.

	A	B	C
(a)	Keel	Wings	Vexillum
(b)	Vexillum	Keel	Wings
(c)	Vexillum	Wings	Keel
(d)	Wings	Keel	Vexillum

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (C)

In papilionaceous corolla, five unequal petals are arranged like a butterfly. The posterior large bilobed petal is called standard or vexillum and it overlaps two smaller lateral petals called wings/alae. The latter in turn overlap the two anterior petals which are fused by the upper anterior margins to form a boat-shaped structure called keel or carina.