1Z 



and it does not possess the latter's whiplike 

 branch formation. 



6. Betula papyri/era 



resembles in all respects the European 

 birches. 



7. Carya alba. 



This, the most important of all hickorys, 

 requires the climate of the silver fir, and 

 wherever the latter can be grown, even if 

 without the seeds maturing, the cultivation of 

 this Carya is feasible. In such localities it is 

 quite proof against frost, but in its youth and 

 up to its tenth year is very slow in growth, so 

 that, on this account, it is only suitable for 

 cultivation in clumps among rapid growing 

 broad-leaved trees. Sowing is recommended, 

 as planting the long-rooted hickory is a difficult 

 matter. The great reproductive power from the 

 stool which it displays, according to Mayr, 

 renders it particularly suitable for coppice cul- 

 tivation in which connection it will supply most 

 valuable small wood. On the best soil it is 

 suitable too for growing as high forest, lOQ-foot 

 trees being found in various parts of Germany. 



8. Carya porcina 



resembles the preceding, except that it can be 

 grown on pine soil of second quality as well. 



