Opuntia engelmannii is a prickly pear common across the south-central and Southwestern United States and northern Mexico. It goes by a variety of common names, including "cow's tongue cactus", "cow tongue prickly pear", "desert prickly pear", "discus prickly pear", "Engelmann's prickly pear", and "Texas prickly pear" in the US, and "nopal", "abrojo", "joconostle", and "vela de coyote" in Mexico. The nomenclatural history of this species is somewhat complicated due to the varieties, as well as its habit of hybridizing with Opuntia phaeacantha.