This photo shows Amoeba with a cross section of a Pacific Northwest Douglas Fir tree.  These trees can live for a thousand years, primarily because they have a very thick bark that allows them to survive many pestilence attacks and moderate fires.

Technically, the Douglas Fir isn’t a true fir tree, as evidenced by a close look at the “needles” and the cones. I considered using “fake fur” as today’s Punny Monday answer, but I figured you’d all be even less likely to guess that.

Douglas Fir trees are the most commonly marketed Christmas trees in the United States.  They are usually trimmed to a perfect cone shape when young, and then they continue to grow that way.  The Noble Fir and Grand Fir are also sold as Christmas trees.