Question
Differentiate between. Spike and spadix.

Answer

Differences between spike and spadix are as follows:
 
Spike
Spadix
i.
A spathe-like covering is absent. The inflorescence is covered by a large bract called spathe.
ii.
The peduncle is nonfleshy. The peduncle is fleshy.
iii. The whole penducle is covered by flowers. The apical part of peduncle, called appendix, is naked, i.e., without flowers.

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