Saguaro cacti and barrel cacti in bloom, Saguaro National Park, Rincon Mountain District, Tucson, Arizona, United States of America, North America

Endemic giant barrel cactus (Ferocactus diguetii), Isla Santa Catalina, Gulf of California (Sea of Cortez), Baja California Sur, Mexico, North America

Endemic giant barrel cactus (Ferocactus diguetii), Isla Santa Catalina, Gulf of California (Sea of Cortez), Baja California Sur, Mexico, North America

Saguaro cacti and barrel cacti in bloom, Saguaro National Park, Rincon Mountain District, Tucson, Arizona, United States of America, North America

Center of a Red Barrel Cactus (Ferocactus cylindraceus) flower, Anza-Borrego Desert State Park, California, United States of America, North America

Barrel cactus and saguaros, Saguaro National Park, West, Tucson, Arizona, United States of America, North America

The endemic giant barrel cactus (Ferocactus diguetii) on Isla Santa Catalina in the lower Gulf of California (Sea of Cortez), Baja California, Mexico

Golden Barrel Cactus or Mother-in-Law's Cushion (Echinocactus grusonii), Mexico

Golden Barrel Cactus, Golden Ball (Echinocactus grusonii)

Cushion formation of Golden Barrel Cactus or Mother-in-Law's Cushion (Echinocactus grusonii), Jardin Exotique de Monaco, Botanical Gardens of Monaco, Monaco, Europe

Mother-in-law chair (Echinocactus grusonii) or golden-ball cactus, cactus, spines, close-up, Botanical Garden, Dahlem, Berlin, Germany, Europe

Golden Barrel Cactus (Echinocactus grusonii), public Botanical Garden of the Ruhr-University Bochum, North Rhine-Westphalia, Germany, Europe, PublicGround

Wind mill in a cactus garden, Golden Barrel Cactus (Echinocactus grusonii), Jardin de Cactus, built by the artist Cesar Manrique, Guatiza, Lanzarote, Canary Islands, Spain, Europe

Golden barrel cactuses (Echinocactus grusonii), Jardin de Cactus, a cactus garden built by the artist Cesar Manrique, Guatiza, Lanzarote, Canary Islands, Spain, Europe

Golden barrel cactuses (Echinocactus grusonii) in front of a wind mill, Jardin de Cactus, a cactus garden built by the artist Cesar Manrique, Guatiza, Lanzarote, Canary Islands, Spain, Europe

Mexico, Bajio, San Miguel de Allende, Botannical Gardens Barrel cactus growing on rocky slope.