Usnea

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Usnea \Us"ne*a\, n. [NL., from Ar. usnah moss.] (Bot.)
     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.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  Usnea
       n : widely distributed lichens usually having a grayish or
           yellow pendulous freely branched thallus [syn: {genus
           Usnea}]