The Collaborative International Dictionary of English v.0.48:

Culcita \Culcita\ n.
   a genus that includes some plants usually placed in e.g.
   genus Dicksonia; terrestrial brackenlike ferns of tropical
   America, Malasia to Australia and Polynesia; also native in
   southwestern Europe and Atlantic islands.

   Syn: genus Culcita.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Culcita
    n 1: includes some plants usually placed in e.g. genus
         Dicksonia: terrestrial ferns resembling bracken; tropical
         America; Malaysia to Australia and Polynesia; southwestern
         Europe and Atlantic islands [syn: Culcita, genus
         Culcita]