The Collaborative International Dictionary of English v.0.48:

Matteuccia \Matteuccia\ prop. n.
   A small genus sometimes included in genus Onoclea; in some
   classifications both genera are placed in Polypodiaceae.

   Syn: genus Matteuccia, Pteretis, genus Pteretis.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Matteuccia
    n 1: small genus sometimes included in genus Onoclea; in some
         classifications both genera are placed in Polypodiaceae
         [syn: Matteuccia, genus Matteuccia, Pteretis, genus
         Pteretis]