52 Bulletin of the University of Texas 
The wood is strong, but rather brittle and soft. It is used 
principally for fuel. 
5. Hicoria cordiformis (Wagenheim) Britton. Pignut. Pig 
Hickory. Tight Bark Hickory. <A forest tree 100° high and 
2°-3° diameter, with stout branches, widespreading crown, 
and tight, thin, heht gray bark which sometimes separates to 
form thin plates. Twigs when young, thin and hairy, becoming 
brown and smooth with age. Leaves 6’-10’ long, the main axis 
somewhat hairy, with 5-9 leaflets. The leaflets are lanceolate 
to oblong or obovate, 2’-6’ long, smooth above, hairy beneath, 
somewhat curved, unequal at base. Fruit globose 347-114’ 
long, 4-winged from the apex to the middle, husk thin, about 
1-16 inch, covered with yellow scurfy pubescence, tardily 
dehiscent. Nut ovoid or oblong, somewhat. flattened, some- 
times broader than long, with thin and brittle shell. Kernel 
very bitter. 
Quebec west to Minnesota, south to Florida, and west to 
Texas. In moist soils to the Trinity valley. 
The wood is tough, heavy, strong, and durable. Used for 
vehicles and machinery. | 
6. Hicoria ovata (Miller) Britton. Shellbark Hickory. 
Sealy Bark Hickory. Red Hickory. <A large forest tree 100° 
or more in height and 3°-4° diameter. Bark or trunk separat- 
ing in thin, long, flat plates, light gray or darker. Leaves 
8’-14’ long with 5-7, generally 5, leaflets. The leaflets are 
ovate to ovate-lanceolate, 4’-7’ long, the lateral sessile. the 
terminal stalked. Fruit subglobose, or obovate, depressed 
at the apex, 1’-1144’ long. The husk is thick and the seg- 
ments split freely to the base. Nut variable in shape and size, 
oblong, subglobose, or obovoid, somewhat flattened and 
wrinkled. Shell rather thin. Kernel sweet and edible, used 
extensively for food. 
(Juebee to Minnesota and Kansas, and extending south to 
Florida and Texas. In Texas it occurs in rich moist soils of 
the eastern portion. 
The wood is hard, strong, and elastic. It is used in the 
manufacture of vehicles, and machinery. The nut is an im- 
portant article of commerce. 
7. Hicoria alba (Linnaeus) Britton. White Hickory. 
