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, {Polystichum
           acrostichoides]
      2: North American fern with evergreen fronds [syn: {marginal
         wood fern, leatherleaf wood fern, {Dryopteris
         marginalis]