TREES OF THE NORTHERN UNITED STATES 



P. Alleghani<*nsis. 



2. Prunus 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, y z to 1 in. in diameter, yellow, 

 orange, or red ; skin tough and bitter. Stone 

 with two sharp edges. A small, 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. Primus Alleghani6nsis, Porter. (ALLE- 

 GHANY PLUM.) Leaves lanceolate to oblong- 

 ovate, often long-acuminate, finely and sharply 

 serrate, softly pubescent when young, smooth 

 when old; fruit globose-ovoid, under y z 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. 



4. Prunus Chicasa, Michx. (CmcASAW 

 PLUM.) Leaves long, narrow, almost lanceo- 

 late, acute, finely serrate, thin. Flowers on 

 short stalks. Fruit globular, y z to % in. in di> 

 ameter, thin-skinned, without bloom, yellowish- 

 red, pleasant to taste. Stone globular, without 

 sharp edges. A thorny shrub or small tree, 6 to 

 15 ft. high ; wild in New Jersey, west and south, and often cultivated. 



5. Prunus spinosa, L. (SLOE. BLACKTHORN. 



BULLACE PLUM.) 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 

 edge ; flesh greenish, 

 astringent. A low tree 



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 

 f dom^stica. lower side of the leaves pubescent. 



