SUMMER KEY TO THE SPECIES OF PYRUS 
a. Leaves simple; fruit a light green pome an inch or more in 
diameter; branches contorted, bearing many short, spur- 
like: “Dranchletsinc cou oeoe ca ce oa sales P. coronaria, p. 145. 
aa. Leaves compound; fruit berry-like, 14 inch in diameter, 
bright red; branches not contorted, not bearing many short, 
spur-like branchlets...............00-5 P americana, p. 147. 
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