Roadless Areas
Home/Species/ American Alpine Ladyfern

Athyrium americanum

(Butters) Maxon

American Alpine Ladyfern

G4Apparently Secure (G4G5) Found in 60 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.129002
Element CodePPDRY02010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumFilicinophyta
ClassFilicopsida
OrderPolypodiales
FamilyAthyriaceae
GenusAthyrium
Synonyms
Athyrium alpestre(Hoppe) De ClairevilleAthyrium alpestre ssp. americanum(Butters) LellingerAthyrium alpestre var. americanumButtersAthyrium distentifoliumTausch ex OpizAthyrium distentifolium ssp. americanum(Butters) HultenAthyrium distentifolium var. americanum(Butters) Boivin
Other Common Names
alpine ladyfern (EN) Alpine Ladyfern (EN) American Alpine Lady Fern (EN) Athyrie alpestre (FR)
Concept Reference
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Taxonomic Comments
Has been treated as Athyrium alpestre ssp./var. americanum, and as A. distentifolium var. americanum.
Conservation Status
Review Date2011-11-01
Change Date1995-12-06
Edition Date1998-08-01
Edition AuthorsGeoffrey Hall
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences81 to >300
Rank Reasons
Wideranging, of conservation concern in only a few areas, but abundance data not well known.
Occurrences Comments
Through much of northern North America.
Ecology & Habitat

Habitat

Wet, rocky slopes, prefers calcareous soil.
Other Nations (2)
United StatesNNR
ProvinceRankNative
WashingtonSNRYes
UtahS1Yes
NevadaS1Yes
CaliforniaSNRYes
WyomingS2Yes
IdahoSNRYes
OregonSNRYes
MontanaS4Yes
ColoradoS3Yes
AlaskaSNRYes
CanadaN5
ProvinceRankNative
AlbertaS1Yes
Yukon TerritorySHYes
Island of NewfoundlandS2Yes
LabradorS2Yes
British ColumbiaS5Yes
QuebecS3Yes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (60)
California (21)
AreaForestAcres
Castle Crags AShasta-Trinity National Forest113
Castle Crags BShasta-Trinity National Forest1,619
Castle PeakTahoe National Forest14,974
EagleStanislaus National Forest16,116
Grouse LakesTahoe National Forest19,085
Hall Natural AreaInyo National Forest5,236
Heart LakeLassen National Forest9,349
Hoover - Green Ck NoHumboldt-Toiyabe National Forest7,155
Hoover - Virginia LksHumboldt-Toiyabe National Forest5,050
Jennie LakeSequoia National Forest2,388
Log Cabin SaddlebagInyo National Forest15,165
Mt. OlsenInyo National Forest2,161
Mt. Shasta AShasta-Trinity National Forest676
Mt. Shasta BShasta-Trinity National Forest2,809
Orleans Mtn.Klamath National Forest49,090
Orleans Mtn. CSix Rivers National Forest15,589
PyramidEldorado National Forest24,347
San JoaquinSierra National Forest22,474
TinemahaInyo National Forest27,060
Tioga LakeInyo National Forest829
Tragedy - Elephants BackEldorado National Forest20,866
Montana (4)
AreaForestAcres
Crazy MountainGallatin National Forest82,093
HoodooLolo National Forest105,162
North AbsarokaCuster National Forest21,063
Northwest PeaksKootenai National Forest15,358
Nevada (3)
AreaForestAcres
Humboldt - Angel LkHumboldt-Toiyabe National Forest1,008
Ruby - Lamoille CynHumboldt-Toiyabe National Forest32,771
Ruby - MarshHumboldt-Toiyabe National Forest10,164
Oregon (8)
AreaForestAcres
Boulder ParkWallowa-Whitman National Forest12,141
Bull Of The WoodsMt. Hood National Forest8,843
Crane MountainFremont National Forest23,096
Imnaha FaceWallowa-Whitman National Forest29,575
Little Eagle MeadowsWallowa-Whitman National Forest6,984
OlallieMt. Hood National Forest7,607
Opal CreekWillamette National Forest5,417
Twin MountainWallowa-Whitman National Forest58,533
Washington (20)
AreaForestAcres
Alpine Lakes Adj.Wenatchee National Forest57,104
Boulder RiverMt Baker-Snoqualmie National Forest32,563
Canyon CreekWenatchee National Forest7,983
ChelanWenatchee National Forest74,650
Dixon MountainGifford Pinchot National Forest6,339
Glacier Peak BMt Baker-Snoqualmie National Forest19,328
Glacier Peak JMt Baker-Snoqualmie National Forest26,482
Glacier Peak KMt Baker-Snoqualmie National Forest47,269
Glacier Peak LMt Baker-Snoqualmie National Forest14,084
Heather LakeWenatchee National Forest10,628
Jefferson RidgeOlympic National Forest6,512
Liberty BellOkanogan National Forest108,495
Mt. Baker MaMt Baker-Snoqualmie National Forest24,847
Mt. Baker Noisy - DiobsudMt Baker-Snoqualmie National Forest56,039
Mt. Baker NorthMt Baker-Snoqualmie National Forest16,873
Mt. Baker WestMt Baker-Snoqualmie National Forest25,390
Pasayten RimOkanogan National Forest17,074
Rock CreekWenatchee National Forest32,239
SawtoothOkanogan National Forest122,194
TeanawayWenatchee National Forest72,849
Wyoming (4)
AreaForestAcres
French CreekMedicine Bow-Routt National Forest5,928
Libby FlatsMedicine Bow-Routt National Forest11,107
Snowy RangeMedicine Bow-Routt National Forest29,660
West Slope TetonsTarghee National Forest47,448
References (4)
  1. Flora of North America Editorial Committee (FNA). 1993a. Flora of North America north of Mexico. Vol. 2. Pteridophytes and gymnosperms. Oxford Univ. Press, New York. xvi + 475 pp.
  2. Hulten, E. 1968. Flora of Alaska and neighboring territories. Stanford Univ. Press, Palo Alto, CA. 1008 pp.
  3. Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
  4. Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.