Pictured is a Golden barrel cactus in The Garden of the Arts of Marrakesh, Morocco. Echinocactus grusonii or Kroenleinia grusonii, popularly known as the golden barrel cactus, golden ball or mother-in-law`s cushion, is a species of barrel cactus which is endemic to east-central Mexico. Echinocactus grusonii specimens may also be seen in collections of desert plants in many botanical gardens