32 



A PRIMER OF FORESTRY. 



queutly those on the lower and inner parts of the crown 

 are more vigorous, x^lentifulj and persistent than is 



the case with intoler- 

 ant trees. Thus the 

 crown of a tolerant 

 tree in tlie forest is 

 usually denser and 

 longer than tliat of 

 one wiiich bears less 

 shade,. It is usually 

 true tliat tlie seed- 

 lings of trees with 

 dense crowns are able 

 to flourish under 

 cover, while those of 

 light-crowned trees 

 are intolerant. This 

 rough general rule is 

 often of use in the 

 study of forests in a 

 new country, or of 

 trees whose silvicul- 

 tural character is not 

 known. 



Fig. 29. — A. small Ked Spruce in the Adiron- 

 dack Mountains of New York. For many 

 year.s this tree stood under the dense cover 

 of taller trees. During that time its branches 

 spread to tlie sides, but it made scarcely any 

 growth in heijrht. Then more liglit came to 

 it, ]irobably by the full of some tall neighbor, 

 and it began to recover its strength and grow 

 much faster. The thin upper part of tbe toleraUCC of trCCS iS 

 crown is where this faster height growth lias 



tol:erance and in- 

 tolerance. 



The tolerance or in- 



been going on. 



one of their most im- 

 portant silvicultural 

 characters. Frequently it is the flrst thing a forester 

 seeks to learn about them, because what he can safely 



