Cacti of N Chihuahuan desert by Paul Hyder

Paul Hyder narrates an educational PowerPoint slide show on Cacti of Northern Chihuahuan Desert. The Chihuahuan Desert occupies much of West Texas, parts of the middle and lower Rio Grande Valley and the lower Pecos Valley in New Mexico, and a portion of southeastern Arizona, as well as the central and northern portions of the Mexican Plateau. This presentation will reference cacti in the northern area of this desert.