Opuntia macrocentra

Opuntia macrocentra, the long-spined purplish prickly pear or purple pricklypear, is a cactus found in the lower Southwestern United States and Northwestern Mexico. A member of the prickly pear genus, this species of Opuntia is most notable as one of a few cacti that produce a purple pigmentation in the stem. Other common names for this plant include black-spined pricklypear, long-spine prickly pear, purple pricklypear, and redeye prickly pear. Opuntia macrocentra is an upright spreading shrub consisting of several joined segments called pads. This cactus produces large colorful yellow and red flowers and dark red edible fruits. ...read more on Wikipedia.