Fauna
Plant

Christmas Fern

Polystichum acrostichoides

Also known as Dagger Fern, Christmas Shield Fern

Christmas ferns grow in dense, fountain-like clumps that remain dark green throughout cold winter months, prostrating under snowfall to form a protective layer over woodland soil. Each individual leaflet features a distinct basal ear, famously resembling a Christmas stocking or Santa's sleigh. As spring arrives, new silver-scaled croziers uncurl vertically while the old, flattened fronds decompose into rich forest humus.

EvergreenWoodlandNative
Christmas Fern reference1 / 7
(c) Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay · cc-by
—observations
—countries
—peak records
Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preySunlight, Soil Moisture, Soil Minerals
Predators
  • White-tailed Deer
  • Slugs
ThreatsHabitat fragmentation, severe soil erosion, invasive non-native plants
HabitatsMoist hardwood forests, stream banks, rocky wooded slopes
Life span20–50+ years
Classification
  1. OrderPolypodiales
  2. FamilyDryopteridaceae
  3. GenusPolystichum
  4. SpeciesPolystichum acrostichoides
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Identification: Look for single pinnae shaped like Christmas stockings with a prominent heel near the rachis.
  • Garden Cultivation: Plant in deep shade with moist, well-draining, organically rich soil to stabilize slopes.
  • Seasonal Tracking: Observe how old fronds flatten to protect soil before silvery croziers uncurl in spring.
Related species
Keep collecting in Fauna

Found in Collections

Ecosystem chain Pro

Secret Garden

Christmas Fern is found in this collection. Identify it in Fauna to fill this slot and continue your progress.

Unlock to track progress

Continue in the app
Help improve the field guideSomething wrong?

Report a name, category, or profile issue for review.

Checking your Fauna account…