The Collaborative International Dictionary of English v.0.48:

Greenery \Green"er*y\, n.
   Green plants; verdure.
   [1913 Webster]

         A pretty little one-storied abode, so rural, so
         smothered in greenery.                   --J. Ingelow.
   [1913 Webster]

WordNet (r) 3.0 (2006):

greenery
    n 1: green foliage [syn: greenery, verdure]