The Collaborative International Dictionary of English v.0.48:

Oreopteris \Oreopteris\ prop. n.
   A genus of ferns having species, formerly included in genus
   Dryopteris or Thelypteris.

   Syn: genus Oreopteris.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Oreopteris
    n 1: 3 species of ferns formerly included in genus Dryopteris or
         Thelypteris [syn: Oreopteris, genus Oreopteris]