Photos of cacti from the Southwest USA: Many of the cacti are in bloom, hailing from arid Sonoran desert. A few are cacti from other countries photographed at the Phoenix or Tucson Botanical Gardens.

My plant identifications are based on the referenced works noted below. While significant effort has been made to correctly label the pictures, my identifications could be wrong; corrections are welcome!

References:
* A Field Guide to the Plants of Arizona, Anne Orth Epple, Falcon Publishing Company, 1995
* National Audubon Society Field Guide to Wildflowers - Western Region, Richard Spellenberg, Alfred A. Knopf Inc., 2001
* Desert Wildflowers, multi-author pamphlet, Arizona Native Plant Society, 1991
* Arizona Wildflowers: A Year-Round Guide to Nature's Blooms, Evelyn Howell, Book Division of Arizona Highways Magazine, 2006
* Mohave Desert Wildflowers: A Field Guide to the High Desert Wildflowes of California, Nevada and Arizona, Jon Mark Stewart, self-published, 1998
* California Desert Flowers: An Introduction to Families, Genera and Species, Sia and Emil Morhardt, University of California Press, 2004

"Flower's are nature's way of smiling"