mixed forests, sometimes of only two species but 

 usually more. Douglas-fir, western larch, white 

 fir, and lodgepole pine also occur in these mixed 

 forests. At a few low points along the Cascade 

 Range summit, where moisture conditions are 

 favorable, Douglas-fir, western redcedar, and 

 western hemlock form stands similar to those west 

 of the summit. Extensive pure stands of lodge- 



pole pine are usually at higher elevations, often 

 occupying old burns originally held by other 

 conifers. 



Sierra juniper forms extensive stands on the drier 

 sites, below elevations at which ponderosa pine 

 occurs. In central Oregon more than 650,000 

 acres are occupied by practically continuous juni- 

 per stands. 



*j£^**M*;as!} 



Figure 3. — Stand of virgin ponderosa pine, composed of trees averaging 36 inches to 40 

 inches d. b. h. This is the most extensive and important forest type in the ponderosa 

 pine region of Oregon and Washington. (F32W58) 



10 



