42 



wood. It is some twenty years since attempts 

 at growing it under forest conditions were com- 

 menced. According to Schwappach's calculations, 

 only 17 hectares 1 have been planted. The 

 following, at any rate, proves its rapidity in 

 growth, for, as Booth 2 says, it attained in the 

 course of twenty- two years a height of 14 metres 

 with a diameter of 60 centimetres just above the 

 ground. 



21. Quercus alba, L., White Oak. 



This tree which, from the botanical, sylvi- 

 cultural, and timber-producing points of view, is 

 a very near relation of both the indigenous oaks 

 has, nevertheless, not been planted anywhere on 

 a large forestal scale, although as an ornamental 

 tree for autumn time it far excels any other kind 

 of oak. 



22. Quercus macrocarpa, Michx., Large Fruited 

 Oak, Bur Oak, Overcup Oak. 



Here again, as regards this oak, which so far 

 has given no proof of superiority over the native 

 species, nothing in the way of trial planting has 

 been attempted in Germany outside the park 



1 i hectare = 2.47 acres. 



2 " Die weitere Behandlung der Versuche mit auslandischen 

 Holzarten," "Zeitschrift fur Forst- und Jagdwesen," 1892, 



P- 339- 



