Definitions for usneaˈʌs ni ə

This page provides all possible meanings and translations of the word usnea

Princeton's WordNet

  1. Usnea, genus Usnea(noun)

    widely distributed lichens usually having a greyish or yellow pendulous freely branched thallus


  1. usnea(Noun)

    A lichen of the genus Usnea.

  2. Origin: From أشنة.

Webster Dictionary

  1. Usnea(noun)

    a genus of lichens, most of the species of which have long, gray, pendulous, and finely branched fronds. Usnea barbata is the common bearded lichen which grows on branches of trees in northern forests


  1. Usnea

    Usnea is the generic and scientific name for several species of lichen in the family Parmeliaceae, that generally grow hanging from tree branches, resembling grey or greenish hair. It is sometimes referred to commonly as Old Man's Beard, Beard Lichen, Tree's Dandruff, Woman's Long Hair, or Tree Moss. It should not be confused with Oak Moss, which it physically resembles and is also called Tree Moss. Usnea grows all over the world. Like other lichens it is a symbiosis of a fungus and an alga. The fungus belongs to the division Ascomycota, while the alga is a member of the division Chlorophyta.

U.S. National Library of Medicine

  1. Usnea

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


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