LUMBER TREES 103 



both in the capacity for rapid growth so con- 

 spicuously as to seem to belong not merely to a 

 different species but to an entirely different tribe 

 of trees. 



Here it is referred to only in connection with 

 the demonstration it gave of the possibility that 

 new types of forest trees might be developed by 

 hybridization and selection, quite as had been 

 claimed in the comment that aroused such skep- 

 tical and even sarcastic response from the pro- 

 fessional forester. 



But after this demonstration had been made 

 it was no longer possible even for the hide- 

 bound conservative to deny the possibility that 

 forest trees, like other plants, are somewhat 

 plastic materials in the hands of the plant 

 developer. 



And in course of time it came to be recog- 

 nized though even now the knowledge has 

 scarcely been acted on that the new idea given 

 by observation of the Royal and Paradox wal- 

 nuts could be utilized for the practical purpose 

 of supplying timber trees that might be expected 

 to restock our woodland in a fraction of the time 

 that would be required for the growing of trees 

 of unmodified wild species. 



The row of Paradox walnut trees which at 

 fifteen years of age were two feet in diameter 



