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Saguaro cactus at Casa Grande Ruins National Monument.
| Woodpecker holes in saguaro cactus at Casa Grande Ruins National Monument.
| Cactus in Walnut Canyon National Monument.
| Yucca in Walnut Canyon National Monument.
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Cactus near Tucson.
| Saguaro cactus in landscape of Saguaro National Park.
| Saguaro cactus in landscape of Saguaro National Park.
| Saguaro cactus at Desert Botanical Garden.
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Cactus & rock formations of Desert Botanical Garden.
| Saguaro cactus cross section at Desert Botanical Garden.
| Saguaro cactus cross section at Desert Botanical Garden.
| Gila woodpecker (Centurus uropygialis) at Desert Botanical Garden.
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Dove on nest at Desert Botanical Garden.
| Compass barrel cactus (Ferocactus cylindraceus) in Desert Botanical Garden.
| Golden barrel cactus (Echinocactus grusonii) in Desert Botanical Garden.
| Coryphantha pycnacantha cactus in Desert Botanical Garden.
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Octopus Cactus (Stenocereus alamosensis) in Desert Botanical Garden.
| South American cactus in bloom in Desert Botanical Garden.
| Variety of small cacti at Desert Botanical Garden.
| Cactus with unusual growth patterns in Desert Botanical Garden.
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Living stone plants from South Africa in Desert Botanical Garden.
| Living stone plants from South Africa in Desert Botanical Garden.
| Sonita (Pachycereus Schottii) in Desert Botanical Garden.
| Teddy Bear Cholla (Opuntia bigelovii) at Desert Botanical Garden.
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Heart-shaped cactus at Desert Botanical Garden.
| Unusual rectangular cactus top at Desert Botanical Garden.
| Succulents at Desert Botanical Garden.
| Multi-colored cacti at Arizona State University.
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Cactus garden of Phoenician Inn.
| Cactus with red flowers in Paradise Valley.
| Barrel cactus.
| Cactus & window in Barrio Historico.
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Cactus with yellow fruit at San Xavier del Bac Mission Church.
| Woodpecker nesting in cactus.
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