1. North American evergreen fern having pinnate leaves and dense clusters of lance-shaped fronds
   - canker brake, dagger fern, evergreen wood fern, Polystichum acrostichoides

Derived forms: Christmas ferns

Type of: fern

Part of: genus Polystichum, Polystichum

Encyclopedia: Christmas fern

• onside
• onslaught
• onstage
• Ontarian
• Ontario
• ontic
• onto
• ontogenesis
• ontogenetic
• ontogeny
• ontological
• ontologically
• ontologist
• ontology
• onus
• onward
• onward motion
• onwards
• onya
• onycha
• Onychium
• Onychogalea
• onycholysis
• Onychomys
• Onychophora