WordNet (r) 3.0 (2006):

evergreen wood fern
    n 1: North American evergreen fern having pinnate leaves and
         dense clusters of lance-shaped fronds [syn: Christmas
         fern, canker brake, dagger fern, evergreen wood
         fern, Polystichum acrostichoides]
    2: North American fern with evergreen fronds [syn: marginal
       wood fern, evergreen wood fern, leatherleaf wood fern,
       Dryopteris marginalis]