10 



TREES OF NORTH AMERICA 



Fig. 10 



branches forming a narrow head, or frequently with a short divided trunk and a low 

 round-topped head of spreading branches, and thick branchlets orange color during their 



first and second years, finally becoming light 

 gray or dark brown sometimes tinged with red. 

 Bark |'-f thick and irregularly divided into con- 

 nected ridges covered by small closely appressed 

 light brown scales tinged with red or orange color. 

 Wood light, soft, not strong, brittle, pale brown ; 

 largely employed for fuel and fencing, and as 

 charcoal used in smelting; in western Texas occa- 

 sionally sawed into lumber. The seeds form an 

 important article of food among Indians and 

 Mexicans, and are sold in the markets of Colo- 

 rado and New Mexico. 



Distribution. Eastern foothills of the outer 

 ranges of the Rocky Mountains, from northern 

 Colorado (Owl Canon, Lorimer County) ; to the 

 extreme western part of Oklahoma (near Ken- 

 ton, Cimmaron County, G. W . Stevens') and to 



western Texas, westward to eastern Utah, southwestern Wyoming, and to northern and 

 central Arizona; over the mountains of northern Mexico, and on the San Pedro Martir 

 Mountains, Lower California; often forming extensive open forests at the eastern base 

 of the Rocky Mountains, on the Colorado plateau, and on many mountain ranges of 

 northern and central Arizona up to elevations of 7000 above the sea. 



Pinus cembroides var. monophylla Voss. Nut Pine. PiSon. 

 Pinus monophylla Torr. 



Leaves in 1 or 2-leaved clusters, rigid, incurved, pale glaucous green, marked by 18-20 

 rows of stomata, usually about 1|' long, sometimes deciduous during their fourth and fifth 

 seasons, but frequently persistent until their twelfth year. 



A tree usually 15-20, occasionally 40-50 high, with a short trunk rarely more than a 

 foot in diameter and often divided near 

 the ground into several spreading stems, 

 short thick branches forming while the 

 tree is young a broad rather compact 

 pyramid, and in old age often pendulous 

 and forming a low round-topped often 

 picturesque head, and stout light orange- 

 colored ultimately dark brown branch- 

 lets. Bark about f ' thick and divided 

 by deep irregular fissures into narrow 

 connected flat ridges broken on the sur- 

 face into thin closely appressed light or 

 dark brown scales tinged with red or 

 orange color. Wood light, soft, weak, 

 and brittle; largely used for fuel, and 

 charcoal used in smelting. The seeds 

 supply an important article of food to Fig. 1 1 



the Indians of Nevada and California. 



Distribution. Dry gravelly slopes and mesas from the western base of the Wasatch 

 Mountains of Utah, westward over the mountain ranges of Nevada to the eastern slopes 

 of the southern Sierra Nevada, and to their western slope at the head-waters of the Tuo- 

 lumne, Kings and Kern Rivers, and southward to northern Arizona and to the mountains 



