94 WEST-AMERICAN 



yielding tree, the New Mexican piuon, tons of whose 

 delicious pine nuts are gathered and exported annually. 



With the exception of the great Colorado plateau, 

 whose western portion stretches across central Arizona, 

 the forest areas of this territory are limited. This plateau, 

 embracing a region 300 by 70 miles, overlaid by scoria 

 thrown out, ages ago, by the extinct Volcano of Agassiz 

 (one of the San Francisco peaks), is clothed throughout 

 its extent by a yellow pine forest, the proprietors of a 

 large lumbering factory at FlagstafFlev^ling large sections 

 of it annually. The brown-bark variety of Yellow Pine 

 is particularly abundant in this forest. The high slopes of 

 Agassiz and Humphrey afford homes for the large-coned 

 form of the Flexilis White Pine and the plume-branched 

 Foxtail Pine, the Engelmann Spruce, the feather-coned 

 Douglas Spruce and its cork-barked variety, the flat- 

 branched Colorado White Fir and the lovely Arizona 

 Cypress. The foothills and broad border of this plateau 

 ,are clothed with Nut-pines and several Junipers. 



Southward the Mogollon and White Mountains con- 

 tinue sparsely, this forest covering, while the numerous 

 detached peaks scattered over the southern portion of 

 the territory vestiges of vast ranges whose flanks were 

 long ago submerged by debris from the Grand Caiion of 

 the Colorado offer refuge for a large variety of vegeta- 

 tion, much of it related to Mexico. A large-coned form 

 of the Mexican White Pine is on the top of Mt. Graham. 

 A secluded park in the heart of the Santa Catalina 

 Mountains contains the northernmost specimens of the 

 new fiva-leaved Arizona Pine, which is more abundant 

 in the Santa Rita and Sierra Madre Mountains, A robust 



