CONIFERvE 



pyramidal head of slender often pendulous branches and slender branchlets at first 

 orange-brown, becomhig pur- 

 ple, often covered with a a n/TV^x ^ "^?% 

 glaucous bloom and coated 

 while young with rufous pu- p I 

 bescence. Bark I'-l^' thick 

 and irregularly divided by 

 deep connected fissures into 

 narrow rounded ridges cov- 

 ered by small loose red-brown 

 scales. Wood hard, light, 

 not strong-, oale red. 



Distribution. Scattered 

 usually singly or occasionally 

 in small clusters on rocky 

 ridfifes and the sides of ca- 

 nons of the Santa Catalina, 

 Santa Rita, and Chiracahua 

 Mountains of southern Arizona, and on the Sierra Madre of Chihuahua. 



**Cones short-stalked^ their scales thickened ; ivings much shorter than the seeds. 



5. Pinus flexilis, James. Rocky Mountain "White Pine. 



Leaves stout, rigid, dark green, marked on all sides by 1-4 rows of stomata, 

 l^'-3' long, deciduous in their fifth and sixth years. Flowers: staminate reddish; 

 pistillate clustered, bright red-purple. Fruit oval or subcylindrical, horizontal or 

 slightly declining, green or rarely purple at maturity, 3'-10' long, with narrow and 

 slightly reflexed scales opening at maturity ; seeds compressed, -g'-^' long, dark 

 red-brown mottled with black, with a thick shell produced into a narrow margin, 



their wings about J^' wide, generally 

 persistent on the scale after the seed 

 falls. 



A tree, usually 40-50, occasionally 

 80 high, with a short trunk 2-o 

 in diameter, stout long - persistent 

 branches ultimately forming a low 

 wide round-topped head, and stout 

 branchlets orange-green and covered 

 at first with soft fine pubescence, usu- 

 ally soon glabrous and darker colored ; 

 at high elevations often a low-spread- 

 ing shrub. Bark of young stems and 

 brauches thin, smooth, light gray or 

 silvery white, becoming on old trunks 

 l'-2' thick, dark brown or nearly 

 black, and divided by deep fissures into broad ridges broken into nearly square plates 

 covered by small closely appressed scales. Wood light, soft, close-grained, pale 

 clear yellow, turning red with exposure ; occasionally manufactured into lumber. 

 Distribution. Eastern slope of the Rocky Mountains from Alberta to western 



r^\Q ? 



