Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei) and Boojum tree (Fouquieria columnaris) in Sonoran Desert, rainbow in background. Catavina, Valle de los Cirios Reserve, Baja California, Mexico.

Jack Dykinga / Night blooming birdcage evening primrose (Oenothera deltoides) with the Sheep Hole Mountains in the background at sunset, BLM (Bureau of Land Management) land, Mojave Desert, California. March 2014.

Jack Dykinga / Cardon cactus (Pachycereus pringlei) and Biznaga/Barrel cactus (Ferocactus diguetii),growing at the edge of the sea, CONANP protected area.Catalina Island, Sea of Cortez, Baja Sur, Mexico. February 20...

Jack Dykinga / Cardon Cacti (Pachycereus pringlei) on the shore of the Pacific Ocean at sunset, Baja California Sur, Mexico, Central America

Jack Dykinga / Cardon Cactus (Pachycereus pringlei) and Galloping Cactus (Machaerocereus gummosus) amongst flowering Evening Primrose (Oenthera sp), Vizcaino Desert, Baja California Sur, Mexico, Central America

Jack Dykinga / Cardon Cactus (Pachycereus pringlei) reddened on the sun exposed side, Baja California Sur, Mexico, Central America

Jack Dykinga / Cardon Cactus (Pachycereus pringlei) reddened on the sun exposed side, Baja California Sur, Mexico, Central America

Jack Dykinga / Boojum tree {Fouquieria columnaris} and Cardon cactus {Pachycereus pringlei} nr Catavina, Desierto Central, Baja California, Mexico

Jack Dykinga / Boojum tree {Fouquieria / Idria columnaris} and Cardon cactus {Pachycereus pringlei} Baja California, Mexico

Jack Dykinga / Boojum tree {Fouquieria / Idria columnaris} and Cardon cactus {Pachycereus pringlei} silhouette at dawn with crescent moon, Catavinia, Baja California, Mexico

Patricio Robles Gil / Cardon (Pachycereus pringlei) cactus, Esp?ritu Santo Island, Gulf of California, Mexico

Patricio Robles Gil / Cardon (Pachycereus pringlei) cactus and flowering Common Morning Glory (Ipomoea purpurea) vines in the Miquihuana Desert, northeast Mexico

Hiroya Minakuchi / Cardon (Pachycereus pringlei) cactus, Santa Catalina Island, Sea of Cortez, Mexico

Hiroya Minakuchi / Cardon (Pachycereus pringlei) cacti, Santa Catalina Island, Sea of Cortez, Mexico

Hiroya Minakuchi / Cardon (Pachycereus pringlei) cacti, Santa Catalina Island, Sea of Cortez, Mexico

Hiroya Minakuchi / Cardon (Pachycereus pringlei) cacti, Santa Catalina Island, Sea of Cortez, Mexico

Tom Vezo / Turkey Vulture (Cathartes aura) perching on Cardon (Pachycereus pringlei) cactus, sunning itself with wings spread, Sonora, Mexico

Konrad Wothe / Cardon (Pachycereus pringlei) cactus photographed by tourist, largest cacti in the world and may live over 200 years, Sonoran Desert, Baja California, Mexico

Konrad Wothe / Cardon (Pachycereus pringlei) cactus landscape, Baja California, Mexico

Tui De Roy / Cardon (Pachycereus pringlei) cactus, Santa Catalina Island, Sea of Cortez, Baja California, Mexico

Jeff Foott / Boojum tree (Fouquieria columnaris) and Mexican giant cardon (Pachycereus pringlei) in Sonoran Desert. Catavina, Valle de los Cirios Reserve, Baja California, Mexico. 2013.

Jeff Foott / Boojum tree (Fouquieria columnaris) with leaves turning yellow in drought, alongside Mexican giant cardon (Pachycereus pringlei), in Sonoran Desert. Near Bahia de Los Angeles, Baja California, Mexico....

Jeff Foott / Boojum tree (Fouquieria columnaris) and Mexican giant cardon (Pachycereus pringlei) amongst rocks in Sonoran Desert, at sunset. Baja California, Mexico. 2017.

Jeff Foott / Boojum tree (Fouquieria columnaris) with leaves turning yellow in drought, alongside Mexican giant cardon (Pachycereus pringlei), in Sonoran Desert. Near Bahia de Los Angeles, Baja California, Mexico....

Jeff Foott / Boojum tree (Fouquieria columnaris) and Mexican giant cardon (Pachycereus pringlei) amongst rocks in Sonoran Desert. Baja California, Mexico. 2017.

Jeff Foott / Boojum tree (Fouquieria columnaris) and Mexican giant cardon (Pachycereus pringlei) in Sonoran Desert. Baja California, Mexico. 2020.

Jeff Foott / Boojum tree (Fouquieria columnaris) and Mexican giant cardon (Pachycereus pringlei) in Sonoran Desert. Near Bahia de Los Angeles, Baja California, Mexico. 2020.

Jeff Foott / Senita cactus (Pachycereus schottii). Baja California, Mexico.

Jeff Foott / Pitahaya agria (Stenocereus gummosus) and Mexican giant cardon cactus (Pachycereus pringlei) in Sonoran Desert. Near Bahia de Los Angeles, Baja California Sur, Mexico.

Jeff Foott / Senita cactus (Pachycereus schottii) flowering in early morning. Baja California, Mexico. March.

Jeff Foott / Senita cactus (Pachycereus schottii) flowering in early morning. Baja California, Mexico. March.

Jeff Foott / Mexican giant cardon (Pachycereus pringlei) flowers and buds. Near Bahia de Los Angeles, Baja California, Mexico. March.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei), close up of spines on top of young plant. Valley of the Giants, San Felipe, Baja California, Mexico.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei). Valley of the Giants, San Felipe, Baja California, Mexico.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei), close up of spines. Valley of the Giants, San Felipe, Baja California, Mexico.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei) growing amongst rocks. Catavina, Valle de los Cirios Reserve, Baja California, Mexico. 2013.

Jeff Foott / Cholla (Cylindropuntia sp) and Mexican giant cardon (Pachycereus pringlei) cacti in Sonoran Desert. Catavina, Valle de los Cirios Reserve, Baja California, Mexico. 2013.

Jeff Foott / Cholla cactus (Cylindropuntia sp) and Mexican giant cardon cactus (Pachycereus pringlei) in Sonoran Desert. Catavina, Valle de los Cirios Reserve, Baja California, Mexico. 2013.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei) in Sonoran Desert. Valley of the Giants, San Felipe, Baja California, Mexico. 2020.

Jeff Foott / Mexican giant cardon (Pachycereus pringlei) cacti in Sonoran Desert. Valley of the Giants, San Felipe, Baja California, Mexico. 2020.

Jeff Foott / Mexican giant cardon (Pachycereus pringlei), two young cacti amongst flowering Desert sand verbena (Abronia villosa) during spring super bloom. Northern Baja California, Mexico.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei), close up of stem with bud of new branch. Baja California, Mexico.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei) stem with flowers and buds. Near Bahia de Los Angeles, Baja California, Mexico.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei) stem with flowers and buds. Near Bahia de Los Angeles, Baja California, Mexico.

Jeff Foott / Climbing milkweed (Funastrum cynanchoides) on Mexican giant cardon (Pachycereus pringlei). Catavina, Central Baja California, Mexico.

Jeff Foott / Climbing milkweed (Funastrum cynanchoides) on Mexican giant cardon cactus (Pachycereus pringlei). Catavina, Central Baja California, Mexico.

Jeff Foott / Climbing milkweed (Funastrum cynanchoides) on Mexican giant cardon cactus (Pachycereus pringlei). Catavina, Central Baja California, Mexico.

Jeff Foott / Climbing milkweed (Funastrum cynanchoides) amongst spines of Mexican giant cardon (Pachycereus pringlei). Catavina, Central Baja California, Mexico.