173 
ROSACE: ROSE FAMILY. CHERRIES AND PLUMS. 




























49 — WILD YELLOW OR RED PLUM. CANADA PLUM. HORSE PLUM. 
(Prunus Americana, Marshall.) 
A small thorny tree, abupdant, and forming thickets in dry or moist 
situations. Itis seldom more than 15 to 30 feet high, witha diameter of 
~$to10inches. In the Rocky Mountain region it is found chiefly in 
central Colorado, but has a wide range through the eastern United 
States and north of the boundary. It reaches its largest size in east- 
ern Texas. ‘The wood is heavy, very hard and tough, and is used oe. 
casionally for fuel, light tool-stoek, ete. The fruit is often large, edible, 
and with a pleasant taste when fully matured. Sometimes cultivated 
or used for grafting stock. 
Description.—Leaves 2 to 3 inches long, ovate, pointed, coarsely or finely toothed 
onthe margin ;’smooth and with prominent veins when mature. T'ruit somewhat 
spherical to ovoid 1» shape, 4 to L inch in diameter; dark, with reddish tinge and 
yellowish areas. 
43.—CHIcKASAW PLUM. Hog PLuM. (Prunus angustifolia, Marshall.) 
Supposed to be a native of the eastern slopes of the southern Rocky 
Mountains, here found at elevations up to 7,000 feet. (But by cultiva- 
-tionit has become widely distributed eastward to the Atlantic coast, 
south of Pennsylvania.) It is a small tree, 20 to 30 feet ip height, with 
a trunk 4 to 10 inches in diameter, or in some situations reduced to a 
shrub. It prefers a rich, moist soil, and is found growing chiefly along 
water-courses and the borders of rich woods. . The wood is rather heavy, 
but soft and brittle. Cultivated considerably for its fruit. 
Peseription.—Leaves 1} to 2 inches long, thin, smooth, lance-sbaped, with fine, sharp, 
-ineurved teeth on the margin. Fruit 4 to } of an inch in diameter (borne on short 
stems), spherical, yellowish red, and with little bloom; thin-skinned, swestish. 
thiefly shrubby and inclined to be thorny. 
44.—WILD RED CHERRY. PINCHERRY. PIGEON CHERRY. (Prunus 
Pennsylvanica, Linn.) 
Commonly a very small tree or shrub as it occurs in the Rocky Moun. 
tains of Colorado. In its eastern range through northern and central 
United States it becomes somewhat larger, but seldom more than 15 to 
50 feet in height, and 6to12 inches in diameter. The wood is soft and 
light, and where large enough is occasionally cut for fuel. Fruit used | 
sometimes for medicinal purposes. 
Description.—Leaves 2 to 3} inches long, ovate, lance-shaped, long-pointed, finely 
and sharply toothed on the margin; thin, shiny, green above and below. Fruit 
small, globular, very dark red; flesh scanty andsour. Bark reddish brown. 
45.—OREGON CHERRY. (Prunus emarginata, Walpers.) 
A tree sometimes 20 to 30 feet in height, and 4 to 10 inches in diam- 
ster, occurring avundantly along streams and in moist valleys of the 

