tree bark

Ponderosa pine bark
Flickr user Tim Jones (CC-BY-NC-ND)

The bark of any tree is more than just a good-looking facade. Even the most graceful aspen or stately ponderosa requires bark to protect its sensitive inner flesh from disease, parasites, and other environmental stresses, such as fire.

Tree Bark

Jun 20, 2014
Jami Dwyer

6/22/14 & 6/23/14: This week on "Fieldnotes:" "Tree Bark," written by Peter Lesica, read by Anne Garde.

Willow: Tree Bark That Begat Aspirin

Dec 6, 2013

December 7th & 9th, 2013: Willow, the original source of aspirin, is still prescribed by herbalists, particularly for urinary tract infections and muscle pain.

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