Athyrium angustum(Willd.) C.Presl

WFO wfo-0001110422 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Athyrium angustum, photographed by Renato Robert
fig. a Renato Robert, CC BY 4.0 / 2022-06-12 / obs. 205776296
Athyrium angustum, photographed by Alexis Godin
fig. b Alexis Godin, CC BY 4.0 / obs. 202451660
Athyrium angustum, photographed by Marilynn Miller
fig. c Marilynn Miller, CC BY 4.0 / obs. 201214081
Athyrium angustum, photographed by Steven Lamonde
fig. d Steven Lamonde, CC BY 4.0 / obs. 202462282
Athyrium angustum, photographed by Nick Kleinschmidt
fig. e Nick Kleinschmidt, CC BY 4.0 / obs. 201407976
Athyrium angustum, photographed by Lynn Harper
fig. f Lynn Harper, CC0 1.0 / obs. 200108129
Athyrium angustum, photographed by Nick Kleinschmidt
fig. g Nick Kleinschmidt, CC BY 4.0 / obs. 199987343
Athyrium angustum, photographed by Jamie VanBuskirk
fig. h Jamie VanBuskirk, CC BY 4.0 / obs. 200695581

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

The specimen a real sheet, in a real collection

Herbarium
The New York Botanical Garden
Accession
01096855
Filed as
Athyrium angustum (Willd.) C.Presl
Det. by
F. B. Matos 2015-08-19
Collected
F. B. Matos 2013-06-20
Origin
US
The sheet
View the digitised specimen (CC BY 4.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Native range 38 botanical countries

Regions where Athyrium angustum is native: Colorado, Connecticut, Delaware, District of Columbia, Greenland, Illinois, Indiana, Iowa, Kentucky, Labrador, Maine, Manitoba, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Brunswick, New Hampshire, New Jersey, New York, Newfoundland, North Carolina, North Dakota, Nova Scotia, Ohio, Ontario, Pennsylvania, Prince Edward I., Québec, Rhode I., Saskatchewan, South Dakota, Tennessee, Vermont, Virginia, West Virginia, Wisconsin ColoradoConnecticutGreenlandIllinoisIndianaIowaKentuckyLabradorMaineManitobaMarylandMassachusettsMichiganMinnesotaMissouriNew BrunswickNew HampshireNew JerseyNew YorkNewfoundlandNorth CarolinaNorth DakotaNova ScotiaOhioOntarioPennsylvaniaPrince Edward I.QuébecSaskatchewanSouth DakotaTennesseeVermontVirginiaWest VirginiaWisconsin DelawareDistrict of ColumbiaRhode I.
Native distribution of Athyrium angustum, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Colorado COL NORTHERN AMERICA
Connecticut CNT
Delaware DEL
District of Columbia WDC
Greenland GNL
Illinois ILL
Indiana INI
Iowa IOW
Kentucky KTY
Labrador LAB
Maine MAI
Manitoba MAN
Maryland MRY
Massachusetts MAS
Michigan MIC
Minnesota MIN
Missouri MSO
New Brunswick NBR
New Hampshire NWH
New Jersey NWJ
New York NWY
Newfoundland NFL
North Carolina NCA
North Dakota NDA
Nova Scotia NSC
Ohio OHI
Ontario ONT
Pennsylvania PEN
Prince Edward I. PEI
Québec QUE
Rhode I. RHO
Saskatchewan SAS
South Dakota SDA
Tennessee TEN
Vermont VER
Virginia VRG
West Virginia WVA
Wisconsin WIS

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Where it actually grows measured, from 2,075 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -16.7 °C -11.5 °C -6.0 °C
Warmest month, mean daily high 21.5 °C 25.6 °C 28.1 °C
Annual rainfall 788 mm 1,018 mm 1,454 mm
Rainfall in the driest quarter 74 mm 201 mm 310 mm

It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 2,075 research-grade observations of Athyrium angustum that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 32 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Aspidium angustum Willd.
  • Asplenium elatius Link
  • Asplenium filix-femina var. angustum (Willd.) D.C.Eaton
  • Asplenium filix-femina var. exile D.C.Eaton
  • Asplenium michauxii Spreng.
  • Athyrium angustum f. confertum Butters
  • Athyrium angustum f. cristatum (Hopkins) Broun ex Weath.
  • Athyrium angustum f. elegans (Gilbert) Butters
  • Athyrium angustum f. laciniatum Butters
  • Athyrium angustum var. boreale Jenn.
  • Athyrium angustum var. cristatum Hopkins
  • Athyrium angustum var. elatius (Link) Butters
  • Athyrium angustum var. glanduliferum Jenn.
  • Athyrium angustum var. laurentianum Butters
  • Athyrium angustum var. rubellum Butters
  • Athyrium asplenioides var. angustum (Willd.) T.Moore
  • Athyrium filix-femina f. confertum (Butters) Fernald
  • Athyrium filix-femina f. cristatum (Hopkins) Clute
  • Athyrium filix-femina f. elegans (Gilbert) Clute
  • Athyrium filix-femina f. laciniatum (Butters) Fernald
  • Athyrium filix-femina f. laurentianum (Butters) Fernald
  • Athyrium filix-femina subsp. angustum (Willd.) R.T.Clausen
  • Athyrium filix-femina subsp. angustum (Willd.) Hultén
  • Athyrium filix-femina subvar. elatius (Link) Farw.

and 8 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.