Saguaro Cactus (A Keystone species)

Saguaro National Park, Arizona

Organ Pipe Cactus 

(Organ Pipe Cactus National Monument, Arizona)

Fishhook Barrel Cactus "Biznaga"

Desert Agave "Maguey"

Santa Rita Prickly Pear Cactus "Nopal"

Creosote Bush "Gobernadora"

Ocotillo

Foothills Palo Verde tree (A Keystone species)

Velvet Mesquite tree (A Riparian Keystone species)

Ironwood tree (A Keystone and Foundation species)

Ironwood Forest National Monument, Arizona

Elephant Tree (Baja California Peninsula)

Desert Willow tree "Mimbre"

Cardon Cactus "False Saguaro Cactus" 

(Baja California Peninsula)

Boojum Tree (Baja California Peninsula)

Palo Blanco (Acacia willardiana) tree

Sonora, Mexico

Sonoran Palo Verde tree "Palo Brea"

Blue Palo Verde tree (A Keystone species)

Mexican Palo Verde tree

Desert Museum Palo Verde tree "Hybrid"

Honey Mesquite tree (A Riparian Keystone species)

Screwbean Mesquite tree "Tornillo"

Cat Claw Acacia tree

White-thorn Acacia tree

Smoke Tree (near Yuma, Arizona)

Senita Cactus

Teddy Bear Cholla Cactus (also found in the Mojave Desert)

Chain Fruit Cholla Cactus "Jumping Cholla"

Staghorn Cholla Cactus

Arizona Pencil Cholla Cactus

Engelmann's Prickly Pear Cactus "Nopal"

Silver Dollar Prickly Pear Cactus "Nopal Tapon"

Beavertail Cactus "Nopal"

Strawberry Hedgehog Cactus "Pitaya"

Palmer's Agave "Maguey"

Cow Horn Agave "Maguey"

(Sonora, Mexico in Sierra Madre Occidental)

Sonoran Tree Beargrass

(Sonora, Mexico in Sierra Madre Occidental)

Desert Spoon "Sotol"

Soaptree Yucca

Josuah Tree (Yucca), 

also found with blue leaves as Blue Josuah Tree.

Grows in the Mojave Desert, but found between the Sonoran and Mojave Desert transition border limit.

Banana Yucca (trunkless Yucca)

Cabo Yucca "Chaparral Yucca" 

(Baja California Peninsula)

California Fan Palm (California)

grows in riparian zones

Mexican Fan Palm (Baja California Peninsula)

grows in riparian zones

Blue Mexican Fan Palm (Baja California Peninsula)

grows in riparian zones

Slipper Plant "Lady's Slippers" 

(Baja California Peninsula)

Jojoba (Jojoba oil is extracted from the seeds)

Brittlebush "Incienso"

Joint Fir "Mormon Tea"