20 



BLUE SPRUCE. 



Blue spruce is native to the Rocky Mountains. Owing to its rich 

 blue-colored foliage, it is a favorite tree for ornamental planting. It 

 is well adapted for use in windbreaks, and it can be grown under irri- 

 gation, both on the bottoms and uplands. 



Approved: 



JAMES WILSON, 



Secretary of Agriculture. 

 WASHINGTON, D. C., June 15, 1907. 



[Cir. 109] 



O 



