PIMACEAE 



* Junlperus scopulorun, Rocky 'fountain Juniper. This species 

 closely resembles the eastern rod juniper* It is a very handsome 

 tree (with straight bole and drooping twigs. It frequently forms 

 thickets at the heads of draws where rapid erosion would be likely 

 to occur if the trees were not present. It, however, grows only at 

 relatively high altitudes (5,000-8,000 feet). It is more rapid 

 growing than our other native junipers and is much more suitable 

 for an ornamental. 



*Junipcruc utahonsis, Utah Juniper. This is sometimes con- 

 fuse rl with the so-called one-seeded juniper, Juniper us monosperaa. 

 The former is commonly coarser, usually more tree- like and has a. 

 largo fibrous one-seeded fruit. The latter is more slender, usually 

 has abundant trunks from a single base and has small juicy one- 

 seeded fruits. Each is to be found in pure stand covering thousands 

 of acres. The Utah juniper is usually considered superior to the 

 single-seeded juniper becau.se of its more tree-like habits which 

 yield better posts. It, however, becomes somewhat of a weed in 

 places, encroaching rapidly on grazing land when it becomes over- 

 grazed. This is the condition over large areas between Ashfork and 

 Pre soot t for example. 



Pseu dotsuga taxifolia, the Douglas Fir, is too widely known 

 to need discussion here. As is knoxvn, it is one of our best forest 

 trees. This applies to the Southwest as well as to the Rooky Moun- 

 tains and the Morthwest. It, however, is not suitable for erosion 

 control work in any of the projects now under consideration as it 

 grows at too high an altitude. 



Cupr essus arizonica, the Arizona Cypress, is one of our best 

 known and most widely appreciated trees in the Southwest* It is a 

 grayish-green cedar-like evergreen tree native to the canyons and 

 mountain slopes in the southwestern ranges at altitudes of 3,000 to 

 7,000 or 8,000 feet. Cupressus arizonica var. bonita closely resem- 

 bles this species. It reaches its optimum development in the 

 Chirioahua fountains (Chiricahua National Monument) and in northern 

 Mexico. In congested stands and in deep canyons it frequently 

 reaches a height of seventy feet and a diameter of one and one-half 

 feet or more. It reaches its greatest altitudinal range in the 

 Chiricahua Mountains, there appearing on the crest of the main 

 range as a low spreading tree of striking beauty. Doubtless the 

 species and variety are us'ed indiscriminately on the market. Balled 

 trees can be purchased in many of the Southwest and Pacific Coast 

 nurseries. The greatest value of this tree is for ornament and 

 shade but its drought resistance suggests it for woodland planting 

 and for binding rocks and soil in canyons. In the mountains above 

 Clifton and in the 3 e dona section of Arizona it is severely attacked 

 by a fungus, Gymno sporangium ou press i- 



Picea sap. Two species of true Spruce extend into the South- 

 west. Both occur in the Rockv Mountains to the north and extend 



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