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Photographic gallery.  Thousands of particles under the microscope.
Douglas Fir (Pseudotsuga menziesii) Pollen Through the Microscope

Douglas Fir (Pseudotsuga menziesii) Pollen

This is pollen collected by tapelift from an automobile windshield during April in Western Washington State. The mounting medium has a refractive index of 1.49. The windshield was yellow with the coating of pollen. Douglas fir pollen is inaperturate and filled with starch grains. The released starch results in a sticky deposit on the windshield.

Transmitted Oblique Off Crossed Linear Polarized Light


KINGDOM: Plantae DIVISION: Pinophyta CLASS: Pinosida ORDER: Pinales FAMILY: Pinaceae GENUS: Pseudotsuga SPECIES: menziesii

Significance in the Environment:

Characteristic Features:

Inaperturate, spheroidal, psilate, torn open or cracked open, large (100 to 125 micrometers)

Associated Particles:


Faegri, Knut and Johs Iversen, TEXTBOOK OF POLLEN ANALYSIS, Hafner Publishing Company, 1964.

Kapp, Ronald O., HOW TO KNOW POLLEN AND SPORES, Wm. C. Brown Company, 1969.

Moore, P.D., J. A. Webb, and M. E. Collinson, POLLEN ANALYSIS, Blackwell Scientific Publications, 1991