Which among dicotyledons are considered to have most primitive genera?

papilionaceae (Crotolaria sp.)

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Cucurbitaceae (Cucurbita sp)

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Magnoliaceae (Magnolia sp.)

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Rosaceae (Rosa sp.)

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Solution

The correct option is C Magnoliaceae (Magnolia sp.)
The earliest known flowering plants date back to about 130 million years ago. According to Cronquist (evolution and classification of flowering plants, 1988), the most primitive of all living angiosperms belong to the subclass Magnoliidae. This subclass contains several primitive plant families, including the water-lily family (Nymphaeaceae), buttercup family (Ranunculaceae) and magnolia family (Magnoliaceae).

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