288 THE BOOK OF FORESTRY 
b1. Wood soft to very soft. 
a2. Pores crowded, occupying nearly all the 
space between pith rays. 
a3. Color yellowish white, often with a greenish 
tinge in heartwood. 
WHITEWOOD—Liriodendron tulipifera 
or 
TULIP 
62. Pores not crowded, occupying not over 4 
the space between rays; heartwood 
brownish white to very light brown. 
Wood light, soft and moderately 
strong. 
BASSWOOD—Tilia americana 
c3. Pith rays scarcely distinct, yet if viewed with 
ordinary lens, plainly visible as grayish 
brown specks on the cross-section. Sap- 
wood white, heartwood reddish. 
al. Pith rays fairly distinct, the pores rather 
few and not more abundant in the 
spring wood. 
BIRCH—either 
CHERRY BIRCH—Betula lenta or 
YELLOW BIRCH—Betula lutea 
