190 



AMERICAN HONEY PLANTS 



ble for the bee to spread this disease. Experiments by Dr. J. H. Merrill, 

 at Kansas Agricultural College, indicate that the aphids are the carriers 

 of the infection. 



PENNSYLVANIA— Honey sources of. 



Pennsylvania is in what is generally known as the white clover region. 

 White and alsike clover are of first importance. Buckwheat, in some sec- 

 tions, is also a main source of surplus. In spring, the willows and maples, 

 followed by dandelion and fruit bloom, furnish both nectar and pollen for 

 early brood rearing. In the mountains, azalea and laurel furnish some 



Fig. 107. Blossoms of Clethra. or sweet pepper bush. 



