The whorl of bracts inflorescence of Helianthus (sunflower) is
A
Involucre
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B
Involucel
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C
Stipule
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D
Bract
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Solution
The correct option is A Involucre In capitulum inflorescence, the whole cluster of florets is surrounded by a whorl of bracts collectively called involucre. The florets can be ray or disc florets.