152 



Trees, Stars, and Birds 



U. S. Forest Service 



FIG. 102. Sycamore. The black lines 

 are pith rays, which are very promi- 

 nent in this wood. 



U. S. Forest Service' 



FIG. 103. Sugar maple. The wood 

 is hard and because of its even texture 

 is excellent for flooring. 



Pores in summerwood larger and not so 

 numerous; heartwood brown, with red- 

 dish tinge, especially in vicinity of knots ; 

 rays averaging somewhat less in height 

 than in white-oak group 



RED-OAK GROUP 



D. Pores plainly visible without lens in springwood; 

 large in summerwood also, but somewhat smaller 

 than those of springwood. 



i. Wood very heavy and exceedingly tough; heart- 

 wood light reddish brown; fine lines of ^paren- 

 chyma cells in the wood running parallel with 

 the annual rings HICKORY 



