122 SILVA OF NORTH AMERICA. ROSACEZ, 
in the north Atlantic states. This knowledge he has turned to During the last three years Mr. Dunbar has carefully studied the 
good account in Rochester, where he is now assistant superin- numerous species of Cratzegus which abound near Rochester in the 
tendent of the city parks, and has charge of the Pinetum and the valley of the Genesee River, where he has first distinguished a 
large shrub collection in Highland Park. number of interesting forms. 
EXPLANATION OF THE PLATE. 
Puate DCLXXVII. Cratmeus PEDICELLATA. 
. A flowering branch, natural size. 
. Vertical section of a flower, enlarged. 
. A calyx-lobe, enlarged. 
. A fruiting branch, natural size. 
. Vertical section of a fruit, enlarged. 
. Cross section of a fruit showing the nutlets, natural size. 
NAOT PF WN & 
. A nutlet, enlarged. 
