|The winged grains
of Pinus are readily
recognisable, although difficulties occur when determining
the frequency of pollen relative to the trees in the area.
The grain is known as saccate having two separate sacs
similar in size (looks like Mickey Mouse!), with no conspicuous
verrucae on the inner side of transverse body wall being
slightly granulate, and the upper surface forming a thicker
wall (Andrew, 1984, and Moore et al.,1991).
View Uppsala University images of Pinus Sylvestris
by clicking here
Photo of a Pinus
photo of a Pinus sylvestris grain