Other Names : Usnea sp., Usnea lichen, old man's beard, Blood Spattered Beard, beard moss, beard lichen, Baardmos, Usnée, 日本語, 中文<br>The genus Usnea Adans. (Parmeliaceae; lichenized Ascomycetes) is a typical group of mostly pale grayish-green fruticoselichens that grow as leafless mini-shrubs. More than 360 species of Usnea are known in the world.
==Special Precautions of Usnea==
* There is reason to believe that Usnea, in high concentrations, could possess some toxicity.The National Toxicology Program is currently evaluating the issue.