Spine (botany)

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Spine (botany)

Spines are leaves that have been modified into cylindrical, hard structures with sharp ends. They are occasionally called thorns

Thorn (botany)

Thorns are branches or stems that are modified into hard structures with sharp, pointy ends. Though thorns are similar in appearance to spine or prickles, the three structures are differentiated by the plant organ from which they arise: thorns are modified Plant stem, spines are modified leaves, and prickles are extensions of the Cortex a...
, which is incorrect (thorns are modified branches or stems). Similar to prickle

Prickle

In botany, a prickle is a modified extension of the cortex and epidermis into a sharp, needle-like structure. By extension, it can refer to:*Prickle cell of the skin...
s and thorns, they are used by plants to protect themselves from herbivores.

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Encyclopedia

Spines are leaves that have been modified into cylindrical, hard structures with sharp ends. They are occasionally called thorns

Thorn (botany)

Prickle