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Athyrium filix-femina ssp. angustum

Athyrium filix-femina (L.) Roth ssp. angustum (Willd.) R.T. Clausen

Subarctic Ladyfern, Northern Lady Fern

Dryopteridaceae (Wood Fern Family)

Synonym(s): Athyrium angustum, Athyrium angustum var. rubellum, Athyrium angustum var. subtripinnatum, Athyrium filix-femina var. angustum, Athyrium filix-femina var. michauxii, Athyrium filix-femina var. rubellum


USDA Native Status: L48 (N), CAN (N), GL (N), SPM (N)

The Lady Fern has a very untidy look by mid-summer as it succumbs to damage by insects, leaving it ragged and dis-coloured. (Ferns of Grey and Bruce Counties)


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Plant Characteristics

Duration: Perennial
Habit: Herb , Fern
Leaf Complexity: Bipinnate
Leaf Shape: Elliptic
Size Notes: Fronds up to about 4 feet long.

Bloom Information

Bloom Color: Not Applicable
Bloom Notes: Not a flowering plant. Reproduces by spores.


USA: CO , CT , DC , DE , IA , IL , IN , KY , MA , MD , ME , MI , MN , MO , NC , ND , NE , NH , NJ , NY , OH , PA , RI , SD , TN , VA , VT , WI , WV
Canada: NB , NS , ON , PE
Native Habitat: Forest

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Athyrium filix-femina ssp. angustum in USDA Plants
FNA: Find Athyrium filix-femina ssp. angustum in the Flora of North America (if available)
Google: Search Google for Athyrium filix-femina ssp. angustum


Record Modified: 2023-06-01
Research By: TWC Staff

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