Italy, Lazio, Rome, Trastevere, Orto Botanico (Botanical Gardens), cacti plants with childs finger pointing.

Italy, Lazio, Rome, Trastevere, Janiculum Hill, Orto Botanico (Botanical Gardens), childs finger pointing to cacti plant.

Cactus, Flowering cacti close-up showing red flower.

Cactus, Flowering cacti close-up showing red flower.

Cactus, Golden Barrel Cactus, Echinocactus grusonii, Mass of small spiky cacti.-

USA, Arizona, Saguaro National Park, Saguaro cacti against blue sky.

USA, Arizona, Saguaro National Park, Saguaro cacti growing in barren landscape against blue sky.