THE OAKS 69 
mossy-cup leaf are not as regular as those of the white 
oak, and it is not so thin and delicate. 
Its wood is very strong and is valuable for many 
purposes, such as boats, carriages, farming implements, 
railroad ties, and cooperage. 
30. Black Oak and Black-Jack Oak. These two trees 
are usually found growing in wild places, and the 
Fic. 82. Leaves of Black Oak and Black-Jack Oak (Black-Jack on right) 
black-jack oak is often called barren oak from the fact 
that it frequents bleak and barren plains, such as the 
sandy stretches of New Jersey and Long Island. 
The sketch shows the difference in the leaves, that 
of the black-jack having only three main lobes, or 
