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 (AVagenheim) Britton. Pignut. Pig 

 Hickory. Tight Bark Hickory. A forest tree 100 high and 

 2 -3 diameter, with stout branches, widespreading crown, 

 and tight, thin, light 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 ^'-l 1 /^' 

 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. 

 Scaly 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, I'-l 1 /?' 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. 



Quebec 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) BHtton. White Hickory. 



