The Claret Cup Hedgehog’s origin is the Southwest U.S. and Mexico. In Phoenix, it can be located in full sun, as long as it gets afternoon shade, and it will tolerate temperatures into the low 20s. There are about ten varieties of the Claret Cup Hedgehog, with differing spines and ribs. However, all varieties have the red cup-shaped flower.
The scientific name for Claret Cup Hedgehog is Echinocereus triglochidiatus. The word Echinos is of Greek origin, and means hedgehog. Cereus means a wax taper. The combination word for this genus of cacti is supposed to describe the cactus. I’m not sure what kind of hedgehog and candle those who named this genus were used to seeing. I don’t see any resemblance to either.