usnea

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us·ne·a

 (ŭs′nē-ə, ŭz′-)
n.
Any of various widely distributed lichens of the genus Usnea, characterized by a pendulous, usually branched thallus, often growing on trees.

[From Arabic 'ušna, moss; akin to Persian ušna.]

usnea

(ˈʌsnɪə)
n
(Plants) a lichen that hangs from tree branches. Also called: old man's beard

us•ne•a

(ˈʌs ni ə)

n., pl. -ne•as.
any pale green or gray, mosslike lichen of the genus Usnea, common on rocks and trees.
[1590–1600; < New Latin, Medieval Latin < Arabic or Persian ushnah]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.usnea - widely distributed lichens usually having a greyish or yellow pendulous freely branched thallusUsnea - widely distributed lichens usually having a greyish or yellow pendulous freely branched thallus
fungus genus - includes lichen genera
family Usneaceae, Usneaceae - fruticose lichens having prostrate or erect or pendulous thalli: genera Usnea, Evernia, Ramalina, Alectoria
beard lichen, beard moss, Usnea barbata - greenish grey pendulous lichen growing on trees