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 cross-field pitting, the longitudinal tracheid pitting, and helical thickening. The borders of the pits are clearly evident.

Transmitted Brightfield Illumination.

Definition/Function:

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

Significance in the Environment:

Characteristic Features:

Associated Particles:

References:

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

http://en.wikipedia.org/wiki/Douglas-fir