- Christmas fern, canker brake, dagger fern, evergreen wood fern, Polystichum acrostichoides - North American evergreen fern having pinnate leaves and dense clusters of lance-shaped fronds
--1 is a kind of fern
--1 is a member of Polystichum, genus Polystichum - marginal wood fern, evergreen wood fern, leatherleaf wood fern, Dryopteris marginalis - North American fern with evergreen fronds
--2 is a kind of wood fern, wood-fern, woodfern