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Is this lichen also eaten? And what dishes are made from it?

I've only heard of lichen being used medicinally as an antibacterial.

I heard that too)

The native Americans used to wrap it in with their bandages. It's usually bearded lichen that I've heard of having the most beneficial antibacterial qualities. https://www.growforagecookferment.com/foraging-for-usnea/

Thanks for the interesting information! I will study)