40 



and Cieslar I in the year 1901, drawn attention 

 to this species as a forest tree. 



The clear-cutting system, for the most part at 

 present predominating, gives naturally no possi- 

 bility for this tree, and also many other exotics, 

 of growing up. 



18. Platanus occidentalis, L., Western Plane, 



Buttonwood, Sycamore, Plane Tree. 



Although this tree is very extensively used 

 both in Germany and Austria for ornamental 

 purposes, it is not cultivated anywhere on strict 

 forestal lines, notwithstanding the fact that the 

 wood possesses a pre-eminently beautiful structure 

 with its medullary rays. 



19. Populus canadensis, Monch., syn. Populus 



monilifera, Ait., Canadian Poplar Cotton- 

 wood, Canadian Poplar, and Populus bal- 

 samifera, L., Balsam Poplar, Balm of Gilead, 

 Balsam Poplar. 



In cultivating these various species of poplars 

 the chief idea in Germany seems recently to have 

 been the production of the greatest possible 

 quantity of wood. The wood itself is very soft, 

 and of no use except as backing for furniture and 



' Cieslar, " Uber Anbauversuche mit fremdlandischer Hol- 

 zarten in Osterreich," "Zentralblatt f. d. gesamte Forstwesen," 

 1901, p. 208. 



