30 Trees with Simple Leaves. 



Fig. 14.— Wild Plum, Canada Plum, Horse Plum. P. Ameri- 

 cana, Marsh. 



Leaves, simple ; alternate ; edge sharp-toothed. 



Otitline, long oval to reverse egg-shape. Apex, taper- 

 pointed. Base, pointed or rounded. 



Leaf-stem, one fourth to one half inch long, smooth, 

 reddish, usually with two small wart-like glands on 

 the raised border near the base of the leaf. 



Leaf, two to three inches long ; smooth when mature ; 

 " net-veined," with distinct furrows over the ribs ; 

 somewhat downy on the ribs and in their angles. 



Bark of trunk very dark reddish-green or bronze-green, 

 resembling that of a cherry-tree. 



Fruit, one half to two thirds inch in diameter ; broad 

 oval ; yellow, orange, or red ; with a thick and acid 

 skin and a pleasant flavor. August. 



Stone, slightly flattened, and with both edges winged and 

 sharp. 



Found, from Canada southward to Florida and westward, 

 and often in cultivation. 



A small tree (sometimes a bush), eight to twenty feet 

 high, with hard, reddish wood. In cultivation it forms 

 an excellent stock on which to graft the domestic plums. 



