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Does smoked food count? Or aging in wooden barrels?

Sorry, I can’t count those.

The most famous is willow tree bark that's how aspirin came to be.

Mesquite, bamboo?

quinine, chicle, eucalyptus...

Bay leaves are from trees.

What about palm heart?

Palm oil, maple syrup, stone fruit, curry leaves, bay leaves, and also the leaves of several obscure south East Asian trees like Gnetum gnemon. .

One can also make syrup from various birch, alder, and juglans species — and more!