- Carnegiea gigantea – Saguaro
- Cylindropuntia acanthocarpa – Buck-horn Cholla
- Cylindropuntia arbuscula – Arizona Pencil Cholla
- Cylindropuntia bigelovii – Teddybear Cholla
- Cylindropuntia fulgida – Jumping Cholla
- Cylindropuntia leptocaulis – Christmas Cactus
- Cylindropuntia spinosior – Walkingstick Cactus
- Cylindropuntia versicolor – Staghorn Cholla
- Echinocereus fasciculatus – Pinkflower Hedgehog Cactus
- Echinocereus rigidissimus – Rainbow Hedgehog Cactus
- Echinocereus spp. – Claret-cup Cactus
- Escobaria vivipara – Spinystar
- Ferocactus wislizeni – Candy Barrelcactus
- Grusonia kunzei – Devil's Cholla
- Mammillaria grahamii – Graham's Nipple Cactus
- Mammillaria heyderi var. macdougalii – Macdougal's Nipple Cactus
- Opuntia aciculata – Chenille Pricklypear
- Opuntia engelmannii – Cactus Apple
- Opuntia ficus-indica – Barbary Fig
- Opuntia microdasys – Angel's-wings
- Opuntia santa-rita – Santa Rita Pricklypear
- Peniocereus greggii – Nightblooming Cereus
Cacti
Cacti (plural for cactus) are fleshy, succulent, often spiny plants in the Cactus Family (Cactaceae).
Listed below are some of the cacti found in southeastern Arizona.