Source : Webster's Revised Unabridged Dictionary (1913)

Plumy \Plum"y\, a.
   Covered or adorned with plumes, or as with plumes; feathery.
   ``His plumy crest.'' --Addison. ``The plumy trees.'' --J. S.
   Blackie.

Source : WordNet®

plumy
     adj 1: resembling a plume; "the dog's plumy tail" [syn: {plumelike}]
     2: having or covered with or abounding in plumes; "the plumed
        serpent"; "white-plumed egrets" [syn: {plumed}]
     3: adorned with feathers or plumes [syn: {feathery}, {feathered}]
     [also: {plumiest}, {plumier}]