_Populus monilifera_, the Cottonwood of the Mississippi Valley, grows with the above in the southern part of the Territory, and has about the same value. _Populus tremuloides_, or Aspen, is found about the moist places on the mountain sides, and often borders the glades of the plateaus. The long poles which it furnishes are sometimes used for fencing purposes; it makes a fair fuel; the quantity found is small. _Acer grandidentata_, a species of Maple, abounds at the north as a bush, and rare individuals attain the rank of small trees. Its wood is highly prized for the repair of machinery, but is too scarce to be of great service. _Negundo aceroides_, or Box elder, is found along the water courses in many places. Sometimes along the larger streams it attains a height of 25 or 30 feet. It makes a good fuel, but is found in such small quantities as to be scarcely worthy of mention. _Quercus undulata_, or White oak, is very abundant as a bush, and sometimes attains a diameter of six or eight inches. It is too rare as a tree to deserve more than mere mention. _Betula occidentalis_, a species of Birch, grows about the upland springs and creeks. Its habit is bushlike, but it often has a height of 20 feet, and it makes a tolerable fuel. The Hackberry (_Celtis occidentalis_) and two species of Ash (_Fraxinus coriacea_ and _F. anomala_) grow as small trees, but are exceedingly rare. The above is a nearly complete list of the forest trees of Utah. The number of species is very small; aridity on the one hand, and cold on the other, successfully repel the deciduous trees. The oak, hickory, ash, etc., necessary to such a variety of industries, especially the manufacture of agricultural machinery, must all be imported from more humid regions. The coniferous trees, growing high among the rocks of the upper regions and beaten by the cold storms of a long winter, are ragged and gnarled, and the lumber they afford is not of the finest quality; and the finishing lumber for architectural purposes and furniture must also be imported from more humid regions. IRRIGABLE AND PASTURE LANDS. UINTA-WHITE BASIN. The Uinta-White Valley is a deep basin inclosed by the Uinta Mountains on the north and the Tavaputs highlands on the south. Eastward the basin extends beyond the limits of Utah; westward the Uinta Mountains and West Tavaputs Plateau nearly inclose the head of the Uinta Valley, but the space between is filled with a section of the Wasatch Mountains. From the north, west, and south the Uinta Valley inclines gently toward the Duchesne River. Many streams come down from the north and from the south. In the midst of the valley there are some small stretches of bad lands.