8oo 



Yearboo^ of Agriculture 1949 



115. Ponderosa pine. 116. Jeffrey pine. 117. Digger pine. 118. Knobcone pine. 



5B. Leaves evergreen, needlelike or scalelike, single or not more than 5 in a cluster. 

 C. Leaves with a sheath at base, in clusters of 2 to 5 (or 1 in No. 121) needlelike 



PINE (Pinus). 

 D. Needles 5 in a cluster WHITE (SOFT) PINES. 



112. LIMBER PINE, Pinus flexilis James (Rocky Mountain white pine, white pine; variety: 

 P. flexilis var. reftexa Engelm., P. strobiformis auth.). 



Medium-sized tree of Rocky Mountain region, including adjacent Canada and Mexico. 

 Bark dark brown, furrowed into rectangular, scaly plates. Needles 5 in cluster, slender, 



2 to 3/2 inches long, dark green. Cones short-stalked, 3 to 6 inches long, yellow brown, 

 with thick, rounded scales and large seeds % to J/2 inch long. 



Principal uses: Lumber (mostly for rough construction and occasionally for boxes), 

 mine timbers, railroad ties, poles, and fuel. 



113. WESTERN WHITE PINE, Pinus monticola Dougl. (Idaho white pine [lumber], white 

 pine). 



Large tree of northern Rocky Mountain and Pacific coast regions, including southern 

 British Columbia. Bark gray, thin, smoothish, becoming fissured into rectangular, scaly 

 plates. Needles 5 in cluster, stout, 2 to 4 inches long, blue green. Cones long-stalked, 5 to 

 12 inches long, yellow brown, with thin, rounded scales. 



Principal uses: Important timber tree. Lumber for building construction, matches (the 

 leading match wood), boxes, and millwork. (State tree of Idaho.) 



114. SUGAR PINE, Pinus lambertiana Dougl. (California sugar pine). 



Large tree (largest of the pines) of Pacific coast region from Oregon to Lower 

 California. Bark brown, furrowed into irregular, scaly ridges. Needles 5 in cluster, stout, 



3 to 4 inches long, blue green. Cones long-stalked, very large, 12 to 18 inches long, yellow 

 brown, with thin, rounded scales. 



Principal uses: Lumber for building construction, boxes and crates, millwork, and 

 foundry patterns. 



DD. Needles 3 or fewer in a cluster YELLOW (HARD) PINES (Nos. 115 to 119) 



and PINYONS (or nut pines, Nos. 120 and 121). 

 E. Needles more than 4 inches long. 



115. PONDEROSA PINE, Pinus ponderosa Laws, (western yellow pine, pondosa pine, 

 western soft pine, yellow pine; variety: P. Ponderosa var. scopulorum Engeim, Rocky 

 Mountain ponderosa pine). 



