00 Bulletin of the University of Texas 
2. Bud scales numerous, imbricated, fruit not 
winged as above. The shell of the nut is 
always thick and bony. 
(1) Bark separating from trunk in 
shaggy plates, leaflets 5-7.......... 6 H. ovata. 
(2) Bark not separating as above; 
as ea rletse (O38 oo oi ee hess eee es 7 H. alba. 
bo heallets “S-% oe as her nk cas eee 8 H. glabra. 
1. Hicoria pecan (Marsh) Britton. Pecan. A tall tree 
100° te 170° in height and 6° in diameter with an enlarged, 
buttressed base. Trees growing in the open have a rounded 
erown which is widespreading. Leaves 12’ to 20’ in length 
with 9-17 leaflets which are lanceolate, long pointed, curved, 
serrate 234’-6’ long, rounded, or wedge-shaped at the unequal 
base, hairy when young, becoming smooth with age. Frnit 
in clusters of 3-11, oblong 134’-28%’ long, the husk splitting 
to below the middle. The nut is ovoid to ovoid-oblong, red- 
dish brown, nearly cylindrical. 
In the Mississippi valley from Indiana to Iowa, south to 
Alabaina and Texas. In Texas it occurs along streams cen- 
tral and southwestern. 
The wood is heavy, hard, but not strong and is less val- 
uable than the other hickories. The nuts are the most val- 
uable of the hickories, and are an important article of com- 
merece. Many improved varieties are now known and are 
being extensively planted. The native trees are frequently 
budded with the more desirable varieties. Pecans are also 
desirable shade trees in certain cities of the state, but they 
are rather slow growers for this purpose, and do well only 
in soils that are adapted to them. They are also difficult to 
transplant. 
2. Hicoria Texana (Leconte) Britton. Bitter Pecan. Texan 
Peean. A forest tree 100° high and 3° in diameter, but gen- 
erally much smaller,—15° to 25° tall and 8’-10’ in diameter, 
with a narrow, rounded crown. Leaves 10’-12’ long with 
7-11, occasionally 13, lanceolate, pointed, serrate, leaflets, 
which are curved, almost sessile, hairy at first, becoming 
smooth, 3’-5’ long, 144 wide. Fruit clustered 114’ to 2’ long, 
with a thin husk. The nut is oblong-ovoid, pointed at both 
