With only a few exceptions, the true cacti are found exclusively in the western hemisphere, from Canada to the southern tip of South America, the West Indies, and the Gal pagos Islands. Cacti are often referred to as xerophytes, plants adapted to extremely dry conditions and capable of withstanding drying for extended periods. The most obvious characteristic of cacti are the spines, which serve a number of purposes besides protection, such as casting shadows on the cactus to protect it from the sun, reducing leaf surface area, which reduces water loss, and serving as points of condensation for moisture, which then drips down for use by the roots. 1993-1999 Microsoft Corporation. Not only do desert cacti provide splendid beauty to the desert scenery when the spring time blossoms come, but they are historically a source of food, tools, and adornment to native desert peoples.
Spines become needles for sewing, or interesting pieces in the creation of jewelery.
Ribs become all manner of tools, and even support pieces in home construction. The fruit and meat of many cati can be eaten. Many local people grow prickly pear in their yard. The new growth provides tender meats for the skillet. The Chihuahua Desert is more of a scrub desert than not.