Echinopsis pachanoi (syn. Trichocereus pachanoi)—known as San Pedro cactus—is a fast-growing columnar cactus native to the Andes Mountains at 2,000–3,000 m (6,600–9,800 ft) in altitude. It is found in Argentina, Bolivia, Colombia, Chile, Ecuador, Peru and Venezuela , and it is cultivated in other parts of the world. Uses for it include traditional medicine and traditional veterinary medicine, and it is widely grown as an ornamental cactus. It has been used for h