Thorns are the sharp growths that usually appear on stems of a plant such as roses, that are designed to inflict damage on attackers / predators to protect the flower. They are designed to be a deterrent.

Thorns can be adapted onto other objects for the purpose of protection, for example tentacles as shown here: post #883586

See also

• flower
• rose_(flower)

For more information

• Please see the Wiki entry.