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Photographic gallery.  Thousands of particles under the microscope.
Cirsium arvensis(Canada Thistle) Pollen Under the Microscope

Cirsium arvensis (Canada Thistle) Pollen

This pollen grain was recovered from an air sample collected in Eastern Washington State during August 2012 at an elevation of 1700 feet.

Transmitted Brightfield Illumination


Significance in the Environment:

Characteristic Features:

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