98 TREES OF THE NORTHERN UNITED STATES 
2. Prinus Americana, Marsh. (WILD 
YELLOW OR RED PLUM.) Leaves ovate or 
somewhat obovate, conspicuously pointed, 
coarsely or doubly serrate, very veiny, 
smooth when mature. Fruit with little or 
no bloom, 144 to 1 in. in diameter, yellow, 
orange, or red; skin tough and bitter. Stone 
with two sharpedges. Asmall, thorny tree, 
8 to 20 ft. high, common in woodlands and 
on river-banks. . Many improved varieties, 
some thornless, are in cultivation. 
Wood reddish color. 
3. Prinus Alleghaniénsis, Porter. (ALLE- 
GHANY Pium.) Leaves lanceolate to oblong- 
ovate, often long-acuminate, finely and sharply 
serrate, softly pubescent when young, smooth \ 
when old; fruit globose-ovoid, under 14 in., 
very dark purple, with a bloom; stone turgid, 
a shallow groove on one side and a broad, flat ridge on the other. 
A low, straggling bush, occasionally a tree, 3 to 15 ft. high. 
Mountains of Pennsylvania. 
2 
P. Alleghaniénsis, 
4. Prinus Chicasa, Michx. (CHICASAW 
Puum.) Leaves long, narrow, almost lanceo- 
late, acute, finely serrate, thin. Flowers on 
short stalks. Fruit globular, 14 to % in. in di- 
ameter, thin-skinned, without bloom, yellowish- 
4 red, pleasant to taste. Stone globular, without 
®. Chicasa, sharp edges. A thorny shrub or small tree, 6 to 
15 ft. high; wild in New Jersey, west and south, and often cultivated. 
5. Prinus spinosa, L. (SLOE. BLACKTHORN. 
Butuace Pium.) Leaves obovate-oblong to 
lance-oblong, sharply serrate, soon smooth ; 
leafstalk smooth; fruit small, globular, black, 
with a bloom; the stone 
rounded, acute ‘at one Cz 
edge; flesh greenish, 2 fe 
astringent. A low tree P. spindsa. 
with thorny branches; it is becoming natu- 
ralized along roadsides and waste places; 
from Europe. Var. instititia (Bullace Plum) 
is less thorny, and has the leafstalk and 
lower side of the leaves pubescent. 
