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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Q: 74 (CDS-I/2002)
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

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,7,30,10,7,14,6

keywords: 

{'inflorescence': [0, 0, 2, 0], 'single female flower': [0, 0, 1, 0], 'male flowers': [0, 0, 1, 0], 'involucre': [0, 0, 1, 0], 'capitulum': [0, 0, 1, 0], 'cyathium': [0, 0, 2, 0], 'hypanthodium': [0, 0, 2, 0], 'short stalks': [0, 0, 1, 0], 'verticillaster': [0, 0, 1, 0]}

Option 1: Capitulum refers to an inflorescence that consists of many small flowers grouped together in a dense cluster. Each flower in the cluster may be complete or incomplete.

Option 2: Cyathium is the correct answer. It is a type of inflorescence where a cup-shaped involucre surrounds a single female flower at the center. Surrounding the female flower are several male flowers that are attached to short stalks, called pedicels.

Option 3: Hypanthodium is a type of inflorescence found in certain trees, where the flowers are enclosed within a hollow receptacle known as a syconium. This type of inflorescence is characteristic of fig trees.

Option 4: Verticillaster refers to an inflorescence arrangement where the flowers are arranged in a whorl-like fashion along a stem. Each whorl consists of two opposite flowers, resulting in a clustered appearance.

In conclusion, the correct answer is option 2 - Cyathium, which describes an inflorescence with a cup-shaped involucre enclosing a single female flower and multiple male flowers on short stalks.