http://www.kcet.org/updaily/the_back_fo ... guaro.html
Its gangly silhouette has become synonymous with the entire American West, but the iconic saguaro is actually native to a fairly small area. Despite the label on your Tex-Mex salsa, there are no saguaros in Texas unless they're in botanic gardens or in pots. A stylized saguaro graces the sign of the Cactus Cafe in Wall, South Dakota, but South Dakota is 800 miles from the nearest wild saguaro. Colorado? Nevada? New Mexico? No tienen saguaros.
In fact, the species' range covers about two thirds of the state of Sonora, Mexico, and the southwest third of the state of Arizona, and that is pretty much it excepting one small population in California's Whipple Mountains, in the easternmost part of the state, and an even smaller population in Imperial County. I've come to the Palo Verde Mountains in Imperial County to look for more.