mucholderthen: THIN SECTIONS of a TWIG from a FIR TREEby Eckhard Völcker (Tatcher a Hainu on Flickr) Fir, Abies sp.This cut is from a twig of a fir tree in front of our house. 5x magnification 10x — details of the bark in polarized light
from: https://bevviz.tumblr.com/post/106593575360