Superficially, thorns and spikes look almost identical. However, these structures are formed from different parts of the plant. Botanically, the thorn is a modified stem while a spine is a modified leaf. Furthermore, both of these structures perform similar functions. Read on to explore the differences between the two.
| Spines | Thorns |
| Spines are technically modified leaves | Thorns are technically modified stems |
| Spines often occupy same position as leaves | Thorns are usually formed in place of buds (in the leave’s axil) |
| Primarily function is defence. Also, spines prevent excess transpiration | Thorns are also used for defence. They also aid in climbing |
| Spines have an exogenous origin | Thorns have an endogenous origin |
| Spines are not deeply seated | Thorns are deeply seated |
| Example: Agave | Example: Duranta |
Related Links:
- More Difference Between
- Biology Of Plants – Parts Of Plants, Diagram And Functions
- Morphology Of Flowering Plants – Structure of Flowering Plant
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