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Question

Which of the following is not a characteristic feature of Fabaceae?

A
Descendingly imbricate, ten stamens, diadelphous, ovary superior
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B
Sepals five, gamosepalous, imbricate aestivation, placentation axile
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C
Monocarpellary, ovary superior, style long, slightly bent at the apex
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D
Zygomorphic flowers, diadelphous stamens, many ovules
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E
Corolla five petals, polypetalous, anterior one large and outermost
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Solution

The correct option is A Sepals five, gamosepalous, imbricate aestivation, placentation axile
Fabaceae is known as Leguminosae or bean and pea family. This single monophyletic family has three sub-families such as Mimosoideae, Caesalpinioideae and Papilionoideae.
While the family is characterized by presence of five sepals, zygomorphic flower, gamesepelous and has an imbricate aestivation, the placentation is marginal with one elongated placenta on one side of the ovary (superior) and ovules attached at the fusion of the carpel's margins and not axile ( where the ovary is sectioned by radial spokes with placentas in separate locules).
Therefore, the correct answer is option B.

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