ii8 KEY TO GENERA AND SPECIES 



Wild Plum, Yellow Plum, Prunus americana 

 Marsh. 



178. Teeth of the leaves blunt or glandular-tipped 



179. 



179. Margins of the calyx lobes finely glandular- 



Fig. 222. Wild Plum. 



toothed. Mature fruit smooth, orange-red 

 or yellowish, about i inch long. Newfound- 

 land to New England and westward. 

 (Figs. 223, 224.) Canada Plum, Red 

 Plum, Horse Plum, Wild Plum, Prunus 

 nigra Ait. 



179. Margins of the calyx lobes entire or nearly 

 so 180. 



