78 EVERGREENS OF COLORADO 



Fig. 52. Front yard over-planted with blue spruces. The owner must prune away the 

 lower branches, thus injuring the natural beauty of them, or have the view 

 shut off. 



Fig. 53. Near timber-line. Engelmann Spruce tree showing effects of wind. Near 

 Dixie Lake. 



Fig. 54. At timber-line. Wind-beaten, distorted, grotesque, pitiable "wind timber." 

 (Picea engelmanni.) On James Peak. 



Fig. 55. The two factors which make this spot attractive are water and trees. 



Fig. 56. Tree-clothed mountain slopes offer the chief attraction here. The light-colored 

 foliage in the left foreground belongs to aspens in golden autumn colors. In 

 one of the most noted tourist regions of the state. 



Fig. 57. The gruesome desolation which follows a forest fire. Centuries may elapse 

 before this area becomes reforested. 



Fig. 58. Some common ailments of evergreen trees. 



a. Twigs of Douglas Fir and Blue Spruce affected by a plant louse 



(Chermes). The insect is on the needles in the first, while it 

 causes the cone-like galls to form on the latter. One-half 

 natural size. 



b. Twigs of red cedar showing a small and a large gall caused by a 



fungous parasite (Gymnosporangium). Two-thirds natural size. 



c. Twigs from witches broom of lodgepole pine caused by a mistletoe. 



One-half natural size. 



d. Portion of branch of yellow pine attacked by mistletoe. 



