Noun: dagger fern da-gur furn
- North American evergreen fern having pinnate leaves and dense clusters of lance-shaped fronds
"dagger fern remains green throughout the winter months";
- Christmas fern, canker brake, evergreen wood fern, Polystichum acrostichoides
Derived forms: dagger ferns
Type of: fern
Part of: genus Polystichum, Polystichum