Old Forest Service Tree Sign Aspen

Description

This is an old Forest Service sign. It is made of paper and measures appx. 9" x 11" .  It reads as follows:
"This Tree Is An ASPEN (Populous Tremuloides)....,Aspen is valuable for paper pulp. It sometimes attains a diameter of 2 feet and a height of 125 feet in 100 years. After maturity it is usually killed by fungi, which rot the heartwood. The aspen is the nurse tree of the forest. When fire devastates a mountain side, a thick growth of aspens usually springs up on the burned area. Later, coniferous seedlings spring up under the aspens, gradually overtop them, and restore the forest. the process of replacement often takes a century. Below that reads To Keep The Forest Productive PREVENT FOREST FIRES."
It shows light wear and has a small tack hole at the top.
According to the information I've gathered this was the official  FS emblem used from 1920-1938. This one is not  dated.
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