(62) 



All the remaining trees with one exception that fill the southeast 

 corner of this Section are Colorado Blue- and Roster's Blue- 

 Spruces. The one exception is a plain Colorado Spruce which 

 stands behind the first Colorado Blue-Spruce next to the low 

 pendulous form along the path. We shall not attempt to separate 

 the others, hut shall proceed to the next path and then turn right. 



All the blue spruces are now on our right once more as we go 

 westward. Beyond them along this new path are six more new 

 trees. They stand opposite the first small garden with a low 

 wooden fence around it on our left. They are smaller trees, not 

 so dense, and their foliage tends to droop. They are 



Picea Engelmannii, Engelmann Spruce 



This tree does not thrive so well here as its very close natural 

 associate, the Colorado Spruce. The causes are difficult to deter- 

 mine exactly. They undoubtedly include such factors as polluted 

 atmosphere, short winters, curtailed dormant season, too warm 

 summers, and improper soil conditions with respect to drainage 

 and nutrition. In other sections of the Northeast where the 

 winters are severe the Engelmann Spruce becomes a handsome 

 tree of pyramidal habit. 



The native home of this tree is at elevations ranging from 3,000 

 feet in the Rocky Mountains of Alberta and British Columbia up 

 to 11,500 feet in Arizona and New Mexico. It extends westward 

 to the Cascades of Washington and Oregon, often forming pure 

 forests. 



Five of these eight trees are bluish varieties known as Picea 

 Engelmannii var. glauca. At the proper season they are distin- 

 guishable by the color of their foliage. 



The remaining thirty-one trees in this Section that stand ahead 

 of us and extend around the next turn to the right include fifteen 

 of the green type and eleven of the blue type of Colorado Spruce. 

 We shall not attempt to separate them all. The first two, close 

 together, that stand very near the path came from a nursery as 

 Compact Colorado Blue-Spruce, Picea pungens var. glauca 

 com pacta. 



