Question

Largest petal of papilionaceous corolla is called

• A. Standard
• B. Vexillum
• C. Valvate
  
• D. Both A and B

Answer 1

The correct option is D Both A and B

Papilionaceous corolla has five free petals which resemble a butterfly. The posterior superior petal is larger than the others and is termed as vexillum or standard. The two anterior inferior petals are more or less united and there are two lateral petals called wings. Hence, the largest petal papilionaceous corolla is called vexillum or standard.

So the correct answer is 'Both A and B'.