Usnea barbata

from WordNet (r) 3.0 (2006)
Usnea barbata
    n 1: greenish grey pendulous lichen growing on trees [syn:
         {beard lichen}, {beard moss}, {Usnea barbata}]
from The Collaborative International Dictionary of English v.0.48
Treebeard \Tree"beard`\, n. (Bot.)
   A pendulous branching lichen ({Usnea barbata}); -- so called
   from its resemblance to hair.
   [1913 Webster]
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