In family Papilionaceae, 5 petals form a unique association, in which 3 different elements participate, these are vexillum, alae and carina. What is the number of these elements?

1, 2, 2 respectively

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2, 1, 2 respectively

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1, 1, 3 respectively

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2, 2, 1 respectively

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Solution

The correct option is A 1, 2, 2 respectively
A- Papilionaceous corolla is characterised by an irregular and butterfly like corolla. The big and single posterio-superior petal is known as vexillum or standard. The semicylindrical base of vexillium embraces and compresses two lateral small wings called as alae. The wings encloses a pair of small keel petals, situated below the wings. The two keel petals are fused together at the base to form a boat like structure known as carina.

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