ROSACEAE

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 branchlets.P. coronaria, p. [145].
aa.Leaves compound; fruit berry-like, 1/4 inch in diameter, bright red; branches not contorted, not bearing many short, spur-like branchlets.P. americana, p. [147].

WINTER KEY TO THE SPECIES OF PYRUS

a.Bundle-scars 3 or in 3 compound, but distinct groups; buds 1/8-1/4 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 1/2 inch long; branches not contorted, not bearing many short, spur-like branchlets; fruit berry-like, 1/4 inch in diameter, bright red.P. americana, p. [147].

Sweet Crab. American Crab