372 
Beekeeping 
eys and the variation in color from a supposedly uniform 
floral source may in part be due to varying admixtures of 
honey-dew. 
In the summer of 1909, honey-dew honey was exceptionally 
abundant throughout the eastern United States. This was 
due not only to the shortage of nectar but to an exceptionally 
large number of aphids. The prevalence of these insects is 
determined largely by immediate climatic conditions and 
they are destroyed by millions by heavy rains. Dry seasons 
may therefore dry up the nectaries and at the same time 
allow plant-lice to propagate excessively, giving us our 
honey-dew seasons. 
ANNOTATED LIST OF HONEY-PLANTS 
In the following list an effort is made to give the plants of 
value to the beekeeper, as sources of nectar and pollen, with 
brief notes which will be helpful in determining the relative 
importance of the various species. While this list is chiefly 
for plants in the United States, mention is made of some 
important plants of tropical America, especially of Hawaii 
and Porto Rico. The list will also apply to Canada. 
The arrangement of these notes in alphabetical order is 
adopted as placing the notes where they will first be sought 
by the majority of readers, under the common name of the 
species. The following of the natural order, by families and 
genera, would show relationships which can only be sug¬ 
gested here by naming under each family the species of that 
family that are mentioned in the notes. 
This list is unavoidably incomplete because so little sys¬ 
tematic work has been done on honey-plants. There are 
hundreds of valuable notes on these plants in the bee journals 
but they are hard to find and often it is impossible to tell 
what species is being discussed since the scientific name is 
not given or is given incorrectly and since the same common 
name is sometimes given to two or more species in various 
parts of the United States. 
