NOTE: unless otherwise specifically stated, all of the images shown on this
page are of 1/4" square end grain cross sections shown at 12X with the top
of the image towards the bark and the bottom towards the pith so that
earlywood is towards the bottom of the growth rings and latewood is towards the top
general characteristics of Douglas-fir
- rays: generally barely visible at 10X but occasionally strong enough to see easily at 10X but still not with the naked eye.
- growth rings: there is a very clear, sharp edge at the end of the dark colored latewood and the beginning of the next years light colored earlywood. The transition from earlywood to latewood within the years generally only spreads over a small amount of the year's ring.
- resin canals:
All of these are Pseudotsuga menziesii except the first two, which are labeled separately.
The rest are grouped, arbitrarily and where possible, by more or less similar characteristics
of earlywood/latewood "look".
Pseudotsuga macrocarpa; on these two samples at least, the color contrast between earlywood and latewood is less than that normally found on the Pseudotsuga menziesii samples seen below.
that middle sample has amazingly tiny earlywood and the rest latewood
old growth with obviously tight growth rings