feet. The country consists mostly of great plains and of plateaux or mesas. While the lower levels, except in the bottom-lands of the constantly flowing rivers, are destitute of trees, the mesas, at altitudes of from 6,000 to 7,000 feet, are well covered with low forests of piñon (Pinus edulis), red cedar (Juniperus virginianus) and juniper (Juniperus occidentalis). At altitudes of 7,000 feet
Fig. 2. Mariano.
white pine (Pinus ponderosa) is sparingly found; but at altitudes of 8,000 feet or more it grows abundantly and attains a good size. Spruce (Pseudotsuga taxifolia) is found in shaded valleys, and on northern hill-slopes above 7,000 feet, but it does not form an important part of the forest. It is an essential element in certain rites. Cottonwood (Populus monolifera and P. wislizenii), aspen (Populus tremuloides), oak (Quercus gambellii), oak-bark juniper (Juniperus pachyphloea), and other trees grow less abundantly.
