WINTER KEY TO THE SPECIES OF PYRUS 



a. Bundle-scars 3 or in 3 compound, but distinct groups; buds 

 J4-J4 inch long; branches contorted, bearing many short, 

 spur-like branchlets ; fruit a pome an inch or more in 

 diameter, light green P. coronaria, p. 145. 



aa. Bundle-scars 4-many in a single U-shaped line, not forming 

 3 distinct groups; buds about l /z inch long; branches not 

 contorted, not bearing many short, spur-like branchlets ; fruit 



berry-like, *4 inch in diameter, bright red 



P. amcricana, p. 147. 



143 



