KEY TO GENERA AND SPECIES 109 



apex. Petals white, | inch or more long. 

 Throughout our range. (Fig. 206.) Shad 

 Bush, Service Berry, Amelanchier canaden- 

 sis (L.) Medic. 



158. Mature leaves usually rounded 



at both ends or with an abrupt 

 bristle-like apex; commonly 

 more or less hairy until old. 

 Petals white, less than | inch 

 long. New Brunswick south- 

 ward and westward. (Fig. 207.) 

 Dwarf Juneberry, Amelanchier 

 oblongifolia (T. & G.) Roem. berry. 



THORN. Leaves simple. Fruit fleshy, globular, 

 rarely more than f of an inch thick. Seeds 

 i to 5, each enclosed in a bony seed-like 

 stone. Many species are recognized. Most- 

 ly thorny shrubs, but the following occa- 

 sionally become small trees. Mature fruit 

 is generally essential for identification. 



159. Leaves deeply cut into several sparingly 



toothed segments. Fruit usually with one 

 stone. Cult, and escaped. Native in 

 Eurasia and northern Africa. (Fig. 208.) 

 English Hawthorn, Crataegus monogyna 

 Jacq. 

 159. Leaves not deeply cut, indentations reaching 



