206 Landscape Gardening 



practised, which forces the growth into the lower branches. 

 It grows rapidly even on very poor soil. The weeping 

 variety (P. e., var. inversa) is unique in form, the branches 

 hanging downward close to the trunk, presenting a very 

 picturesque and unusual appearance. 



Colorado Blue Spruce (Picea pungens), Fig. 113. 

 Seedlings of this tnost beautiful spruce vary very much in 



FIG. 113. Colorado Blue Spruce (Picea pungens). 



color, some being dark green, like the Norway spruce, while 

 others are of the most beautiful glaucous or bluish-green 

 color. Some of these very "blue" specimens may be found 

 in every lot of seedlings, but to obtain them with certainty 

 and in large numbers scions are taken from the best- 

 colored specimens and grafted into the ordinary pungens 

 or excelsa stocks. Thus the most perfectly colored speci- 

 mens become rather expensive. They make most beautiful 



