Echinomastus, or pineapple cacti are usually single, forming small globes or cylinders characterized by tubercles arranged in rows, all quite spiny, but lacking any curved (fishhook) spines. There are six US species, all with limited distribution, mostly in Arizona and Texas.




The other two US species are:

Echinomastus gautii, top cactus, south Texas
Echinomastus mariposensis, Lloyd's pineapple cactus, Big Bend area of Texas