Ferocactus echidne

Ferocactus echidne is a barrel cactus in the genus "Ferocactus". It is found in nature in Mexico. This cactus is known commonly as Sonora barrel, Coville's barrel cactus, Emory's barrel cactus, and traveler's friend.
Alternatively it has been assigned the binomials "Echinocactus emoryi", "Ferocactus rectispinus", and "Ferocactus covillei".
This plant is often sold as a houseplant.