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Q73 (CDS-I/2002) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Plant anatomy physiology Answer Verified

In a type of inflorescence, a cup- shaped involucre encloses a single female flower in the centre and a number of male flowers around this on short stalks. This type is called

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Your answer: —  Â·  Correct: B
Explanation

The description provided corresponds to a Cyathium inflorescence, which is a highly specialized cymose inflorescence characteristic of the genus Euphorbia [t1][t2]. In this type, five bracts fuse to form a cup-shaped involucre [t9]. This involucre encloses a single central female (pistillate) flower, which is typically long-stalked and naked, surrounded by several male (staminate) flowers [t1][t4]. Each male flower is reduced to a single stamen on a short stalk [t1][t7]. In contrast, a Capitulum consists of many sessile flowers on a flat receptacle [t8], a Hypanthodium features a fleshy, ball-like receptacle with an internal cavity (as seen in Ficus) [t9], and a Verticillaster consists of clusters of sessile flowers forming false whorls at nodes, typical of the Lamiaceae family [t1][t9].

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