The mineral composition of perennial plant species from widely separated sites in the Mojave Desert varied among sites, but variation between species was more pronounced. According to the nutritional status, species have been classified into different categories each of which includes species characteristically rich or poor in a given element. The close relationships between the nutritional status of these species and their sociological relations, as reflected by the principal component analyses, are evaluated. The frequency of correlation between the concentration of the different element pairs across the different species studied has been evaluated and discussed. Stress has been focused on Ca-Zn relations, with an 80 percent frequency of positive correlation. The causal factor or factors behind this high percentge of positive correlation frequency have been suggested. Linear correlation coefficients between plant composition and soil variables were also obtained.