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Photographic gallery.  Thousands of particles under the microscope.
Pseudotsuga Menziesii, Douglas Fir Radial Section Through the Microscope

Douglas Fir, Radial-Section

This is an image from a stained standard section of Pseudotsuga menziesii made by John P. Limbach of Ripon, Wisconsin. This shows the nodular walls and termination of the vertical parenchyma. They don't contain the helical thickening seen in the vertial tracheids. The pits in the tracheids tend to be borderless.

Transmitted Brightfield Illumination


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

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Core, H.R., W.A. Cote, and A.C. Day, WOOD STRUCTURE AND IDENTIFICATION, Syracuse Wood Science Series, Vol. 6, 1979.