abcd 4 e 2 f 12 



k2 Bluntly serrate; stems with glands near blade. 



CANADA PLUM (Prunus nigra). 

 j 2 1^2~3 in. long, thick and firm; fr. blue-black or purple with 



bloom; leaves with 

 k Bounded or obtuse b.; fr. % in. or less, dark purple. 



ALLEGHANY SLOE (Prunus Alleghaniensis) . 

 k2 Cuneate b., wrinkled; fr. %-l in., blue with bloom. 



GARDEN PLUM (Prunus domestica). 

 h2 Pit turgid (nearly subglobose) marginless; leaves 



i Lance-oblong (occasionally wider) rounded or obtuse b. acuminate 

 j Membranaceous ; cherries small, translucent, red, in clusters, and 



very tart PIGEON CHEERY ( Prunus Pennsylvania ) . 



j2 Firm, with glandular incurved teeth; cherries purple-black, in 

 racemes and of pleasant vinous flavor. 



BLACK CHERRY (Prunus serotina). 

 12 Obovate-oblong, rounded or obtuse b. 



j Bluntly and unevenly serrate; fr. single or few in cluster; 

 k Leaves thin and drooping; fr. sweet. 



SWEET CHERRY (Prunus Avium). 

 k2 Leaves thickish and little if at all drooping; fr. tart. 



SOUR CHERRY (Prunus Cerasus). 



32 Sharply and evenly serrate; fr. in racemes, about % in. and 

 astringent CHOKE CHERRY (Prunus Virginiana). 



