99 



per square yard, is suggested. With the excep- 

 tion of the larch no other kind of timber has, 

 more than this one, such special need for pro- 

 tection against the rubbing action of the roebuck. 

 As regards Agaricus melleus, it is less susceptible 

 than the indigenous spruce. 



The Colorado douglasia displays a remarkable 

 difference in demeanour which, perhaps, gives it 

 a greater value as an ornamental tree, and, in 

 many cases, even as a forest tree. It has, as a rule, 

 blueish white needles, and its long, regular, 

 spheroidical development of stem and branches, 

 raise it, in point of beauty, to the level of a silver 

 spruce. Its absolute immunity to premature frosts 

 and the severest temperatures of winter place it, in 

 this respect, above the Coast douglasia, with 

 which last, however, it displays the same suscepti- 

 bility to late frosts. Then, again, there is the 

 slow growth, in consequence of which it can barely 

 keep pace with indigenous firs and spruce. It is, 

 consequently, not adapted for the filling up of 

 open plantations ; but, on the other hand, it is 

 more suitable than the Coast douglasia for 

 making pure plantations in sloping localities, in 

 which southern aspects may also be given to it 

 (very instructive examples on this point are to 

 be found in the Experimental Forest Gardens of 

 Grafrath. See also illustration 3). It is advisable 

 to provide such pure plantations with an admixture 



