A) Umbel is a racemose inflorescence where all stalked flower aggregate on the flat receptacle
B) Raceme is a racemose inflorescence having main axis shortened & flower born acropetally
C) Spadix is a racemose inflorescence having pendulous spike with main axis much flattened
D) Spike is a racemose inflorescence having sessile flowers
Correct Answer: B
Solution :
Spike is a racemose inflorescence that bears sessile flowers in an acropetal fashion, e.g., chaff flower (Achyranthes), bottle brush (Callisteinon), Adathoda vasica, Amaranthus.
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