6 



TREES OF NORTH AMERICA 



the leiif^th of their finu daik brown obtuse wiii<Ts broadest below tlie middle and 



i' w 



ide. 



A tree, in early life with remote regular whorls of slender branches often clothing 

 tlie stem to the ground and forming an open narrow pyramid; at maturity 200-220 

 high, with a trunk 0-8 or occasionally 12" in diameter, a flat-topped crown fre- 

 quently 00 or 70 across of comj)aratively slender branches sweeping outward and 

 downward in graceful curves, and stout branchlets coated at first with pale or rufous 

 pubescence, dark orange-brown during their first winter, becoming dark purple- 

 brown. Bark on young stems and branches thin, smooth, dark green, becoming on 

 old trunks 2'-3' thick and deeply and irregularly divided into long thick plate-like 

 ridges covered with large loose ricli purple-brown or cinnamon-red scales. Wood 

 light, soft, straight-grained, light red-brown; largely manufactured into lumber and 



used for the interior finish of buildings, woodwork, and shingles. A sweet sugar-like 

 substance exudes from wounds made in the heartwood. 



Distribution. Mountain slopes and the sides of ravines and canons; Oregon from 

 the valley of the Santiam River southward along the Cascade and coast ranges; Cali- 

 fornia along the northern and coast ranges to Sonoma County, along the western 

 slopes of the Sierra Nevada, where it grows to its greatest size at elevations between 

 3000 and 7000, on the mountains in the southern part of the state; and on Mt. San 

 Pedro Martir in Lower California, 



Occasionally planted as an ornamental tree in western Europe and in the eastern 

 states, the Sugar Pine has grown slowly in cultivation and shows little promise of 

 attaining the large size and great beauty which distinguish it in its native forests. 



-- -- Wings shorter than the seeds. 



4. Pinus strobiformis, Engelm. "White Pine. 



Leaves slender, rigid, pale green, whitened on the ventral side by 3-4 rows of 

 stomata, 3^'-4' long, deciduous during their third and fourth years. Fruit 5'-9' long, 

 with scales much reflexed at the apex; seeds broadly ovate, ^' long, about ^ wide, 

 dark red-brown, with a thin shell produced into a narrow margin, their wings 

 rounded, about ^' wide. 



A tree, 80-100 high, with a trunk rarely more than 2 in diameter, a narrow 



