The type of inflorescence characterized by having dimorphic flower is

Catkin

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Umbel

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Corymb

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Capitulum

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Solution

The correct option is D Capitulum
There are two types of inflorescence, racemose and cymose. Racemose inflorescence is further divided into elongated axis, shortened axis and flattened axis. Catkin has elongated axis. It is a modification of spike inflorescence. It bears unisexual flower. Umbel and corymb have shortened axis. In corymb, the lower flowers have long stalks as compared to upper flowers. Umbel has group of flowers at the tip. Capitulum has flattened axis. In this, flower are sessile and are present on a flat surface. It is characterized by having dimorphic flower.
Thus, the correct answer is 'Capitulum.'

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