Mammillaria tetrancistra

Mammillaria tetrancistra (common fishhook cactus) is a series of Mammillaria. It is native to the Mojave and Sonoran Deserts of northern Mexico and the southwestern United States, where it grows in a variety of desert habitat types.

Background
This cactus generally has a single cylindrical stem a few centimeters wide and up to about 25 centimeters tall. Each cluster of spines is made up of 3 or 4 dark, hooked central spines and many straight, white radial spines, the longest reaching 2.5 centimeters in length. The flower is 2 to 4 centimeters wide and pink to lavender in color. The fruit is red, shiny, and fleshy and contains many black seeds coated in corky arils.