GROWTH IN HEKiHT. 



o;> 



tree whicli excels in it, but also the cliiuice to spread 

 laterally, and so to complete the defeat of its slower 

 rivals by overtopping them. 



U/*! 



Fig. 52. Fig. 53. 



A tall clear trunk made by natural pruning, and the base of the same tree. 

 Sitka Spruce in the Olympic Forest Eeserve, "Washington. 



