178 



SIXTEENTH BIENNIAL REPORT 



of the finest timber marketable. Withiu the State of Oregon, the two Chief 

 species of white pine occur — the western white pine (Pinus monticola), and the 

 sugar pine (Pinus lambertiana). The former occurs mostly in the central 

 part of the Cascades wliile the latter occurs especially in the southern part being 

 a continuation of the immense Stands in California. The White bark pine (Pinus 



Flgure 2. White pine tree dying from tlie effects of tlie rust. Note tlie infection 

 on the main trunk and side branches ; also tlie blisters which have broken tlirougli the 

 bark, whicli contain the spores wliicli are carried to currant and gooseberry bushes. 

 (Loaned by courtesy of the Bureau of Plant Industry, U. S. Department of Agriculture. ) 



albicaulis) occurs sparsely at higher altitudes, but is of no economic importance. 

 Sugar pine is America's largest pine, and is one of the finest timber trees in the 

 World. Approximately 11 billion feet occur in this state with an estimated value 

 of $36,000,0(X). Western white pine, while not attaining the size of sugar pine, 



