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Usnea

"Usnea" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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A genus of lichens containing usnic acid and mucilage. Usnea barbata has been used as an herbal medicine.


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This graph shows the total number of publications written about "Usnea" by people in this website by year, and whether "Usnea" was a major or minor topic of these publications.
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