RUTACE A: RUE FAMILY. | 
28.—SHRUBBY TREFOIL. Hop-TREE. (Ptelea angustifolia, Benth.) 
Chiefly a shrub, or sometimes a small tree 15 to 25 feet in height, 
with very slender trunk, usually growing on hillsides in dry, gravelly 
soil, through southern Colorado (extending southward into Mexicoand. 
Texas). Rarely attaining sufficient size to be of economic value. The 
wood is heavy and lard. 
Description.—Leaves compound, composed of three leaflets, which are given off at 
the end of a slender (leaf) stem, 1 to 2 inches long and } to 1 inch wide, lance to 
oblong-lance-shaped, usually tapering to a point at either end; margin entire or 
with shallow rounded teeth; smooth, old leavesshiny. Fruit (much like that of the. 
elm) surrounded by an early orbicular, thin, veiny wing, + to 2.of an inch in diame- 
ter. Bark dark brown and often thickly dotted. 
RHAMNACE: BUCKTHORN FAMILY. 
29.—-BLUE Woop. LoG Woop. PURPLE HAw. (Condalia obovata, 
Hooker.) 
A smail tree or shrub, at best seidom more than 10 to 30 feetin height 
and with very slender trunk—3 to 6 inches in diameter. It is found in 
southern New Mexico (southern Arizona and southwestern Texas, where 
it is said to reach its greatest development), especially along streams. 
Abundant and in many localities forming dense, impenetrable thickets. 
The wood is hare and very heavy. 
Description. —Leaves z to # ofan inch long, by ;y to4of an inch wide, chiefly broad 
at the top end (obovate), tapering to a long point at the base; rounded at the upper 
end, or with a lance-shaped point. Branches with smooth thin bark of a dull white 
or grayish color; branchlets spine-like or terminating in a small sharp spine. Fruit 
a globula1 berry (drupe) with scanty flesh and large hard stone; a short point or 
beak (the persistent stigma) adheres to the end. 
30.—“INDIAN CHERRY.”* (Rhamnus Caroliniana, Walter.) 
A small tree, 15 to 30 feet in height, with a trunk 6 to 10 inches in 
diameter; or sometimes reduced to a slender shrub. It is found in the 
mountains from Colorado to Montana (eastward it ranges from western 
Texas to northern Florida, and northeastward through the valley of 
the Ohio River to long Island, New York). It prefers the rich soil of 
bottom-lands and along streams; probably reaching its Jargest size in 
Texasand Arkansas. The wood is rather light and hard, but not strong. 
Description.—Leaves 3 to 6 inches long, 1 to 24 inches wide; oblong lance-shaped 
or ovate-oblong; with rounded base and rather short point; margin wavy, nearly 
entire or with very small teeth; leaf-stems hairy. Fiowers and fruit borne in the 
axils of the leaves, the latter black, somewhat pear-shaped, and with three large 
seeds; sweet and edible. 
*See Rhamnus in list of shrubs, page 190. 



