The peanut cactus is native to the Andes Mountains in South America, where it grows in rocky, arid conditions. It gets its name from its peanut-shaped, reddish-brown stem that can grow up to six inches in length. The stem is covered in tiny white spines that look like hairs, giving it a unique and interesting appearance.

In the spring and summer, the peanut cactus produces blooming flowers that are brightly colored.