90 THE FOREST TREE CULTURIST. 
when young. This is probably the most abundant of all 
the Hickories, being very common from New England to 
the Mississippi and westward. Its wood is tough and 
light-colored, there appearing to be very little of what is 
usually termed heart-wood, even in the largest trees. The 
nuts of this species are variable: on some trees not more 
than thrce fourths of an inch ia diameter, while on others 
they are two inches. The tree is well suited for growing 
upon high and dry soils, as it is generally found more 
abundant in such situations than in deep, rich soils. 
Carya micxocarPa (Small-fruited Hickory).—Leaflets 
five to seven, oblong lanceolate, smooth; nut nearly round, 
smail, inclosed in a very thin husk; shell also quite thin; 
kernel sweet and large in proportion to the size of the nut. 
Tree grows to a large size, and resembles the preceding 
species. Found occasionally in New Jersey, but more 
common in Pennsylvania and southward. 
CarYA GLABRA (Pig-nut).—Leaflets five to seven, ovate 
lanceolate, smooth ; nut somewhat pear-shaped, with a thin 
husk, which generally adheres to the nut after it has fallen 
from the tree; shell thick; kernel variable — sometimes 
quite sweet, in others bitter. A large tree with a smooth 
bark; wood tough, light-colored; common almost every- 
where; abundant on the dry, sandy hills of New Jersey, 
and westward. 
Carya AMARA (Bitter-nut, Swamp Hickory).—Leaflets 
seven to thirteen, oblong lanceolate, serrate, smooth ; fruit 
nearly round, but variable; shell thin; husk, with quite 
prominent ridges running nearly the whole length, thin ; 
kernel intensely bitter; tree rather graceful; branches 
