Euphorbia antisyphilitica (Candelilla, Wax Plant). Full sun. Hardy to 25°F. Evergreen shrub to 3' tall, mostly leafless stems. Little water. Native to Chihuahuan desert, west Texas, Mexico.

Euphorbia cactiformis. Full sun to light shade. Hardy to 25°F. Evergreen shrub to 6' tall; 6' wide. Little water. Native to Africa.

Euphorbia cooperi (Candelabra tree). Light shade summer in Phoenix. Hardy to 32°F. Evergreen shrub to 12' tall; 8' wide. Little water. Caustic sap. Native to Africa.

Euphorbia Resinifera (Moroccan Mound); USDA: 9-11. Full sun to light shade. Hardy to 22°F. Spiny shrub to 4' tall; 6' wide. Moderate water summer. Native to Morocco.

Euphorbia Tirucalli (Pencil Bush). Sunset: 13, 23, 24, USDA: 10-12 Full sun to light shade. Hardy to 28°F. Succulent bush to 20' tall; Moderate water summer for fast growth. Milky corrosive sap. Native to Africa.

Euphorbia tirucalli red hybrid (Sticks of fire). Sunset: 13, 23, 24, USDA: 10-12 Full sun to light shade. Hardy to 28°F. Succulent bush to 6' tall; Moderate water summer. Milky corrosive sap.

Pedilanthus macrocarpus (Lady slipper) USDA: 9-10. Full sun to light shade. Little to moderate water. Hardy to 25°F. Evergreen bush to 6'tall; 6' wide. Origin: Mexico (Sonora, Baja California).