Pollen is sold as a nutritional supplement, marketed as "bee pollen" (even though it
is of course from flowers). Many trees and flowering plants are good source of
pollen for honeybees. Bees will collect pollen from some grasses and grains when
they cannot find pollens with more nutritional value, however, anemophilous plants
such as grasses generally have very low real value to bees. Some windblown pollen is
likely to be inadvertantly collected by bees, since they bear a static charge.
Ragweed and pine pollen can settle on leaves and other flowers, to add to the total
quantity of pollens that are found upon analysis of gathered pollen.
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