50. Pseudotsuga douglasii, Carr, Coast Doug- 



lasia, Douglas Spruce, Douglas Fir, 

 Red Fir, Oregon Fir. 



51. Pseudotsuga glauca, Mayr, Colorado Doug- 



lasia, Colorado Douglas Fir. 



52. Pseudotsuga macrocarpa, Mayr, Big Cone 



Douglas Fir, Big Cone Red Fir. 



Of these three species of Pseudotsugas^ the 



douglasii and glauca are the most extensively 

 cultivated. The Pseudotsuga macrocarpa has so 

 far proved useless on account of its great suscepti- 

 bility to frost (Mayr). Of the two first mentioned 

 the Coast Douglasia has been more generally 

 adopted and it is to this species alone that all 

 statistics apply which are published in Great 

 Britain and Germany about its growing properties 

 and excellent timber. All particulars on this 

 subject confirm the dictum expressed by Mayr, 

 that the maritime districts of the North Sea and 

 the Atlantic from Mid- Europe must be considered 

 as the stronghold of the Douglas fir. The 

 nearest approach to this is found in the moist 

 atmospheric conditions prevailing on the Northern 

 and Eastern slopes of certain localities of secon- 

 dary mountain chains (Bavarian Forest, Fichtel 

 Mountains). 



Schwappach gives, I.e., page 264, the following 



