usnea

== English == === Etymology === From Arabic أُشْنَة (ʔušna, “moss”). === Noun === usnea (plural usneas or usneae) Any lichen of the genus Usnea. Synonym: old man's beard ==== Derived terms ==== usneoid === References === Wirtz, N., Printzen, C., Sancho, L.G. and Lumbsch, H.T. 2006. The phylogeny and classification of Neuropogon and Usnea (Parmeliaceae, Ascomycota) revisited. Taxon 55(2):367 - 376. Edible and Medicinal plants of the West, Gregory L. Tilford, →ISBN === Anagrams === aunes