Each acetolyzed sample was mounted in glycerin jelly on four or more slides; one preparation was mounted in glycerin jelly stained with safranin. All of the slides were subsequently deposited in the LAMIV/UEFS pollen library.
After identifying the pollen types present on the slides, at least 1200 pollen grains were counted using sampling methods to establish the occurrence percentages of each pollen type: Predominant Pollen -PP (>45%), Secondary Pollen -SP (16e45%), Important Minor Pollen -IP (3e15%), Minor Pollen -MP (1e2%), and “Present” (