While there are many types of cacti, they all share these characteristics:

* Thorns: These modified leaves help protect the cactus from herbivores and reduce water loss.

* No leaves: Instead of leaves, cacti have a thick, fleshy stem that stores water.

* Adapted to arid environments: Cacti are masters of survival in dry, desert conditions.

Let me know if you'd like to know more about cacti! 🌵