Platanthera dilatata

(Pursh) Lindl. ex Beck

Tall White Bog Orchid

G5Secure Found in 505 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.959201
Element CodePMORC1Y1F0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderOrchidales
FamilyOrchidaceae
GenusPlatanthera
Other Common Names
Leafy White Orchid (EN) Platanthère dilatée (FR) Scentbottle (EN)
Concept Reference
Flora of North America Editorial Committee (FNA). 2002a. Flora of North America north of Mexico. Vol. 26. Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York. xxvi + 723 pp.
Taxonomic Comments
Flora North America (vol. 26, 2002) here includes the concept of Platanthera leucostachys (= P. dilatata var. leucostachys) as a variety, while Kartesz (1994) treats it as distinct species.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2025-07-07
Change Date2016-01-12
Edition Date2025-07-07
Edition AuthorsN. Ventrella (2025)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank Reasons
Platanthera dilatata is a perennial orchid occurring in wetlands, tundra, and roadsides of North America, throughout all of Canada, and Alaska in the United States south to California, east to New Mexico, throughout the Great Lakes region and the northeastern United States. There are over two thousand estimated occurrences of this taxon rangewide, which are potentially threatened by development, water diversion, alteration of hydrology, erosion, rights-of-way maintenance, invasive species, deer browse, succession, and likely other threats in some places. Little is known about threats and trends, but with a large range extent, high number of occurrences, abundant habitat, and broad habitat preferences, Platanthera dilatata is considered secure.
Range Extent Comments
Platanthera dilatata occurs in North America, throughout all of Canada, and Alaska in the United States south to California, east to New Mexico, throughout the Great Lakes region and the northeastern United States (FNA 2002, NAOCC 2025). Range extent was estimated to be over 17 million square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected between 1994 and 2025 (GBIF 2025, iNaturalist 2025, NatureServe 2025, RARECAT 2025, SEINet 2025). See individual entries for distribution details about the three varieties.
Occurrences Comments
By applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1994 and 2025, it is estimated that there are more than two thousand occurrences rangewide (GBIF 2025, iNaturalist 2025, NatureServe 2025, RARECAT 2025, SEINet 2025).
Threat Impact Comments
Although threats are not widely documented, Platanthera dilatata is likely threatened by development, water diversion, alteration of hydrology, erosion, rights-of-way maintenance (including mowing and herbicide), invasive species, deer browse, succession, and likely other threats in some places.
Ecology & Habitat

Habitat

Platanthera dilatata occurs in wet meadows, marshes, fens, stream banks, shores, ditches, tundra, seeping slopes, and roadsides from 0-3700 m in elevation (FNA 2002).
Terrestrial Habitats
Forest EdgeTundra
Palustrine Habitats
HERBACEOUS WETLANDFORESTED WETLANDBog/fenRiparian
Other Nations (2)
United StatesN5
ProvinceRankNative
AlaskaSNRYes
South DakotaS1Yes
New MexicoS2Yes
UtahSNRYes
MassachusettsS2Yes
IdahoSNRYes
WashingtonSNRYes
VermontS4Yes
IllinoisS1Yes
ColoradoS4Yes
New YorkSNRYes
ArizonaSNRYes
NevadaS4Yes
ConnecticutSHYes
IndianaSXYes
CaliforniaSNRYes
MontanaS4Yes
WisconsinS4Yes
MaineSNRYes
PennsylvaniaS1Yes
MichiganSNRYes
OregonSNRYes
WyomingS5Yes
MinnesotaSNRYes
New HampshireSNRYes
CanadaN5
ProvinceRankNative
OntarioS5Yes
Island of NewfoundlandS5Yes
Nova ScotiaS4Yes
LabradorS4Yes
AlbertaS3Yes
NunavutS3Yes
SaskatchewanS3Yes
Prince Edward IslandS3Yes
New BrunswickS4Yes
QuebecSNRYes
Northwest TerritoriesS3Yes
Yukon TerritoryS3Yes
British ColumbiaS5Yes
ManitobaS3Yes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (505)
Alaska (60)
AreaForestAcres
Behm IslandsTongass National Forest4,777
Bering LakeChugach National Forest965,076
Boston BarChugach National Forest53,617
Brabazon AdditionTongass National Forest498,819
ChichagofTongass National Forest555,858
Chilkat-West Lynn CanalTongass National Forest199,772
Chugach-12Chugach National Forest8,116
Chugach-13Chugach National Forest13,337
Chugach-8Chugach National Forest21,559
College FiordChugach National Forest1,130,818
Copper River WetlandsChugach National Forest85,972
Douglas IslandTongass National Forest28,065
East MitkofTongass National Forest8,795
EudoraTongass National Forest195,022
Fidalgo-GravinaChugach National Forest257,968
Freshwater BayTongass National Forest44,933
Game CreekTongass National Forest54,469
GravinaTongass National Forest37,381
Green RocksTongass National Forest11,093
Hoonah SoundTongass National Forest79,764
Johnson PassChugach National Forest152,508
Juneau UrbanTongass National Forest101,581
Juneau-Skagway IcefieldTongass National Forest1,187,268
KartaTongass National Forest52,117
KekuTongass National Forest10,869
Kenai LakeChugach National Forest213,172
Kenai MountainsChugach National Forest306,600
KogishTongass National Forest65,216
KosciuskoTongass National Forest64,134
LindenbergTongass National Forest25,855
MadanTongass National Forest68,553
Mansfield PeninsulaTongass National Forest54,991
Neka BayTongass National Forest7,142
Neka MountainTongass National Forest6,138
Nellie JuanChugach National Forest713,697
North BaranofTongass National Forest314,089
North KruzofTongass National Forest33,146
North KupreanofTongass National Forest114,660
North RevillaTongass National Forest215,430
Pavlof-East PointTongass National Forest5,399
Port AlexanderTongass National Forest120,681
Prince William Sound Is.Chugach National Forest118,698
QuartzTongass National Forest143,003
RedoubtTongass National Forest68,347
ResurrectionChugach National Forest224,615
RevillaTongass National Forest29,298
RhineTongass National Forest23,010
Roaded DonutChugach National Forest968
Sheridan GlacierChugach National Forest224,683
Sitka SoundTongass National Forest13,459
Sitka UrbanTongass National Forest112,003
Soda BayTongass National Forest78,091
South KruzofTongass National Forest55,193
Taku-SnettishamTongass National Forest664,928
Tenakee RidgeTongass National Forest20,527
Thorne RiverTongass National Forest72,983
Twenty MileChugach National Forest198,775
Upper SitukTongass National Forest16,789
Windham-Port HoughtonTongass National Forest161,952
Yakutat ForelandsTongass National Forest323,648
California (141)
AreaForestAcres
AgnewSequoia National Forest9,561
Bald MountainTahoe National Forest5,832
Bear Camp FlatModoc National Forest2,471
Bell MeadowStanislaus National Forest7,968
Bell QuinbyShasta-Trinity National Forest11,556
Black ButteMendocino National Forest15,461
Black CinderLassen National Forest239
Black Mtn.Sequoia National Forest15,102
Bonanza KingShasta-Trinity National Forest16,402
Box CampKlamath National Forest858
Bucks LakePlumas National Forest680
Butt Mtn.Lassen National Forest8,217
ButtermilkInyo National Forest542
Caples CreekEldorado National Forest17,854
Carson - IcebergStanislaus National Forest56,430
Castle Crags AShasta-Trinity National Forest113
Castle Crags BShasta-Trinity National Forest1,619
Castle PeakTahoe National Forest14,974
ChannellSequoia National Forest45,429
ChicoSequoia National Forest39,836
ChinquapinShasta-Trinity National Forest22,040
Chips CreekPlumas National Forest12,940
Chips CreekLassen National Forest29,089
Coyote NorthInyo National Forest11,932
Coyote SoutheastInyo National Forest53,159
DardanellesEldorado National Forest8,110
Devil GulchSierra National Forest30,490
Dinkey LakesSierra National Forest34,171
DomeStanislaus National Forest11,085
Domeland Add.Sequoia National Forest3,046
Duncan CanyonTahoe National Forest8,621
EagleShasta-Trinity National Forest6,553
EagleStanislaus National Forest16,116
East ForkShasta-Trinity National Forest6,201
East YubaTahoe National Forest17,968
Elk CreekMendocino National Forest23,182
FalesHumboldt-Toiyabe National Forest9,138
GrangerModoc National Forest23
Granite ChiefTahoe National Forest6,546
GriderKlamath National Forest10,647
GrindstoneMendocino National Forest26,031
Grouse LakesTahoe National Forest19,085
Hall Natural AreaInyo National Forest5,236
Heart LakeLassen National Forest9,349
Hoover - Emma LakeHumboldt-Toiyabe National Forest1,007
Hoover - Green Ck NoHumboldt-Toiyabe National Forest7,155
Hoover - Mt.olsenHumboldt-Toiyabe National Forest624
Hoover - NorthHumboldt-Toiyabe National Forest1,574
Hoover - Twin LakesHumboldt-Toiyabe National Forest102
Hoover - Valley RidgeHumboldt-Toiyabe National Forest564
Hoover - Virginia LksHumboldt-Toiyabe National Forest5,050
Horse Mdw.Inyo National Forest5,687
HortonInyo National Forest5,717
Iceberg - Mill CreekHumboldt-Toiyabe National Forest26,988
Iceberg - Wolf Ck LkHumboldt-Toiyabe National Forest175
Indian CreekKlamath National Forest5,011
IshiLassen National Forest21,805
Jennie LakeSequoia National Forest2,388
JohnsonKlamath National Forest10,652
KangarooKlamath National Forest40,617
Kings RiverSierra National Forest52,999
Lake EleanorShasta-Trinity National Forest397
Lion RidgeSequoia National Forest5,265
Log Cabin SaddlebagInyo National Forest15,165
Long MeadowHumboldt-Toiyabe National Forest11,967
Middle ForkPlumas National Forest29,278
Middle YubaTahoe National Forest7,379
MillModoc National Forest321
Mill CreekLassen National Forest7,587
Mill PeakSan Bernardino National Forest7,884
Mokelumne - CharityHumboldt-Toiyabe National Forest202
MonarchSierra National Forest697
MosesSequoia National Forest22,077
Mt. JacksonHumboldt-Toiyabe National Forest20,721
Mt. RaymondSierra National Forest6,965
Mt. EddyShasta-Trinity National Forest7,232
Mt. HoffmanModoc National Forest9,780
Mt. LassicSix Rivers National Forest6,643
Mt. OlsenInyo National Forest2,161
Mt. RebaStanislaus National Forest3,869
Mt. Shasta AShasta-Trinity National Forest676
Mt. Shasta BShasta-Trinity National Forest2,809
Mt. VidaModoc National Forest7,771
Murphy GladeShasta-Trinity National Forest1,015
NessieInyo National Forest830
Nevahbe RidgeInyo National Forest302
NightStanislaus National Forest3,173
North Fork American RiverTahoe National Forest38,495
North Fork Middle Fork American RiverTahoe National Forest11,245
North LakeInyo National Forest2,406
Orleans Mtn.Klamath National Forest49,090
Orleans Mtn. BSix Rivers National Forest17,183
Orleans Mtn. CSix Rivers National Forest15,589
ParsnipModoc National Forest8,485
Penney RidgeShasta-Trinity National Forest5,226
Pilot CreekSix Rivers National Forest9,192
Pleasant ViewAngeles National Forest26,395
ProspectLassen National Forest4,078
PyramidEldorado National Forest24,347
Raymond PeakEldorado National Forest2,518
Raymond PeakStanislaus National Forest3,646
Raywood Flat BSan Bernardino National Forest11,373
RinconSequoia National Forest54,610
Robinson PeakHumboldt-Toiyabe National Forest5,835
Rock Creek WestInyo National Forest3,626
RussianKlamath National Forest21,771
San Gabriel AddAngeles National Forest2,527
San JoaquinSierra National Forest22,474
ShacklefordKlamath National Forest1,679
Sheep MountainAngeles National Forest21,098
SherwinInyo National Forest3,140
Silver HillHumboldt-Toiyabe National Forest4,423
SinkardHumboldt-Toiyabe National Forest2,004
SiskiyouKlamath National Forest54,039
Siskiyou BSix Rivers National Forest18,871
Slate Mtn.Sequoia National Forest12,299
Slide CreekSix Rivers National Forest11,458
SnoozerKlamath National Forest23,414
Snow MountainMendocino National Forest14,457
Snow MountainLassen National Forest2,165
SoldierModoc National Forest10,102
South SierraSequoia National Forest8,008
South SierraInyo National Forest41,853
SugarloafSan Bernardino National Forest8,206
Table Mtn.Inyo National Forest4,215
Timbered CraterLassen National Forest4,096
TinemahaInyo National Forest27,060
Tioga LakeInyo National Forest829
Tragedy - Elephants BackEldorado National Forest20,866
Trail LakeLassen National Forest1,124
WaterhouseStanislaus National Forest4,394
Weaver BallyShasta-Trinity National Forest829
West YubaPlumas National Forest6,071
WestforkAngeles National Forest4,407
Wheeler RidgeInyo National Forest15,744
Whisky CreekInyo National Forest865
Wild Cattle MtnLassen National Forest4,965
Wild Horse Mtn. (CA)Humboldt-Toiyabe National Forest28,822
Wilderness ContiguousMendocino National Forest3,606
Wonoga Pk.Inyo National Forest11,272
WoodpeckerSequoia National Forest11,936
Colorado (4)
AreaForestAcres
Comanche Peak Adjacent AreaArapaho & Roosevelt NFs44,158
Dome PeakRoutt NF35,716
Long ParkRoutt NF42,100
Pagoda PeakRoutt NF57,676
Idaho (13)
AreaForestAcres
Bighorn - WeitasNez Perce-Clearwater National Forest254,845
Boulder - White CloudsSalmon-Challis National Forest139,297
Boulder - White CloudsSawtooth National Forest322,653
HoodooNez Perce-Clearwater National Forest153,868
Italian PeakCaribou-Targhee National Forest141,158
Lemhi RangeSalmon-Challis National Forest308,533
NeedlesPayette National Forest131,279
North Lochsa SlopeNez Perce-Clearwater National Forest117,662
PalisadesCaribou-Targhee National Forest122,002
Peace RockBoise National Forest191,734
Pioneer MountainsSawtooth National Forest119,563
Pioneer MountainsSalmon-Challis National Forest172,460
SeceshPayette National Forest248,088
Montana (62)
AreaForestAcres
Allan Mountain (01946)Bitterroot National Forest104,184
Allen Peak #185Kootenai National Forest29,638
Anaconda HillHelena National Forest18,546
Anderson MountainBeaverhead-Deerlodge National Forest31,501
Barren Creek #183Kootenai National Forest14,534
Bear - Marshall - Scapegoat - SwanHelena National Forest51,360
Bear - Marshall - Scapegoat - SwanLewis and Clark National Forest344,022
Bear - Marshall - Scapegoat - SwanLolo National Forest118,485
BeartoothGallatin National Forest5,285
Beaver LakeBeaverhead-Deerlodge National Forest11,863
Big BaldyLewis and Clark National Forest43,135
Bmss Ra 1485Flathead National Forest334,275
BridgerGallatin National Forest45,059
Buckhorn Ridge (MT)Kootenai National Forest34,716
Burnt MountainCuster National Forest10,698
Cabin Creek Wildlife Management Area OcdGallatin National Forest35,048
Cabinet Face East #671Kootenai National Forest50,326
Chippewa #682Kootenai National Forest1,262
Clear CreekLolo National Forest5,538
Continental Divide National Scenic TrailBitterroot National Forest312
Crazy MountainGallatin National Forest82,093
Deadhorse Ridge Ra 1128Flathead National Forest23,648
East PioneerBeaverhead-Deerlodge National Forest145,082
Electric PeakHelena National Forest27,872
Electric PeakBeaverhead-Deerlodge National Forest17,997
EmerineBeaverhead-Deerlodge National Forest14,282
Fishtail SaddlebackCuster National Forest16,359
Fred BurrBeaverhead-Deerlodge National Forest5,814
Gallatin FringeGallatin National Forest51,571
HoodooLolo National Forest105,162
Hyalite - Porcupine - Buffalo Horn Wilderness Study AreaGallatin National Forest143,991
Jerico MountainHelena National Forest8,445
LionheadGallatin National Forest33,549
Lolo CreekLolo National Forest14,335
MadisonGallatin National Forest127,859
Meadow Creek - Upper North ForkLolo National Forest6,906
Middle Fork Judith WsaLewis and Clark National Forest81,131
Middle Mtn. / Tobacco RootsBeaverhead-Deerlodge National Forest96,487
Mmw Addition RA 01500Flathead National Forest817
Mt. Gmt Area HCuster National Forest1,335
Mt. Hefty Ra 1481Flathead National Forest12,938
North AbsarokaCuster National Forest21,063
North AbsarokaGallatin National Forest159,075
North Big HoleBeaverhead-Deerlodge National Forest52,227
North CarpBeaverhead-Deerlodge National Forest6,600
Pilgrim CreekLewis and Clark National Forest44,608
Red Lodge Creek HellroaringCuster National Forest17,210
ReefGallatin National Forest2,500
Saddle Mountain #168Kootenai National Forest14,675
SapphireBitterroot National Forest43,303
SapphiresBeaverhead-Deerlodge National Forest66,619
Scotchman Peaks (MT)Kootenai National Forest53,909
Selway - Bitterroot (01067)Bitterroot National Forest114,953
Sheep Mountain - StatelineLolo National Forest37,844
Silver KingBeaverhead-Deerlodge National Forest64,289
Stony MountainBitterroot National Forest44,057
Storm LakeBeaverhead-Deerlodge National Forest9,324
Ten Lakes #683Kootenai National Forest48,545
Tenderfoot - Deep CreekLewis and Clark National Forest85,614
Upper East ForkBeaverhead-Deerlodge National Forest8,905
West Big HoleBeaverhead-Deerlodge National Forest133,563
West PioneerBeaverhead-Deerlodge National Forest248,631
Nevada (24)
AreaForestAcres
Bald Mtn.Humboldt-Toiyabe National Forest41,598
Bunker HillHumboldt-Toiyabe National Forest27,569
Copper Mtns.Humboldt-Toiyabe National Forest31,945
Humboldt - Angel LkHumboldt-Toiyabe National Forest1,008
Jarbidge - Canyon CkHumboldt-Toiyabe National Forest3,258
Jarbidge - Coon CkHumboldt-Toiyabe National Forest866
Jarbidge - Slide CkHumboldt-Toiyabe National Forest752
North SchellHumboldt-Toiyabe National Forest30,773
Rose - Davis Mdw.Humboldt-Toiyabe National Forest2,361
Rose - EvansHumboldt-Toiyabe National Forest4,782
Rose - GalenaHumboldt-Toiyabe National Forest3,711
Rose - Thomas Mdw.Humboldt-Toiyabe National Forest358
Rose - Whites CanyonHumboldt-Toiyabe National Forest2,568
Ruby - Lamoille CynHumboldt-Toiyabe National Forest32,771
Ruby - MarshHumboldt-Toiyabe National Forest10,164
Ruby - Secret Pk.Humboldt-Toiyabe National Forest6,749
Ruby - SegundaHumboldt-Toiyabe National Forest12,532
Ruby - ThompsonHumboldt-Toiyabe National Forest5,289
Snake - ChokecherryHumboldt-Toiyabe National Forest30,845
Snake - MurphyHumboldt-Toiyabe National Forest27,064
Snake - Peacock CynHumboldt-Toiyabe National Forest1,069
South SchellHumboldt-Toiyabe National Forest125,614
Toiyabe RangeHumboldt-Toiyabe National Forest99,225
West SchellHumboldt-Toiyabe National Forest21,656
New Hampshire (12)
AreaForestAcres
Carr MountainWhite Mountain National Forest17,110
Dartmouth RangeWhite Mountain National Forest9,233
Great Gulf Ext.White Mountain National Forest15,110
JobildunkWhite Mountain National Forest3,660
KilkennyWhite Mountain National Forest28,766
Kinsman MountainWhite Mountain National Forest8,999
Mt. Wolf - Gordon PondWhite Mountain National Forest11,846
PemigewassetWhite Mountain National Forest32,255
Pemigewasset ExtWhite Mountain National Forest15,840
Presidential - Dry River ExtWhite Mountain National Forest10,555
Sandwich RangeWhite Mountain National Forest16,797
Wild RiverWhite Mountain National Forest46,878
Oregon (73)
AreaForestAcres
Badger CreekMt. Hood National Forest847
Baldy MountainMalheur National Forest6,416
BearwallowsDeschutes National Forest7,317
Bend WatershedDeschutes National Forest14,829
Boulder ParkWallowa-Whitman National Forest12,141
Brown Mt.Winema National Forest3,117
Bull Of The WoodsMt. Hood National Forest8,843
Bulldog RockUmpqua National Forest6,056
Bulldog RockWillamette National Forest559
Calf - Copeland CreekUmpqua National Forest15,696
Castle Rock AppendageUmpqua National Forest4,649
Cedar GroveMalheur National Forest114
Cook RidgeWallowa-Whitman National Forest19,617
CornpatchWillamette National Forest7,346
Crane MountainFremont National Forest23,096
DoneganUmpqua National Forest5,914
Drake - McdowellFremont National Forest5,767
Echo MountainWillamette National Forest8,098
Fish Creek AppendageUmpqua National Forest1,377
Flag CreekMalheur National Forest7,716
French Pete (a)Willamette National Forest1,668
Glacier MountainMalheur National Forest20,661
Gordon MeadowsWillamette National Forest9,463
Greenhorn MountainMalheur National Forest15,936
Greenhorn Mtn.Umatilla National Forest11,191
HellholeUmatilla National Forest65,679
Imnaha FaceWallowa-Whitman National Forest29,575
Jackson Creek AppendageUmpqua National Forest4,673
Jumpoff JoeUmatilla National Forest5,516
LakeMt. Hood National Forest1,327
Lake ForkWallowa-Whitman National Forest21,936
LarchMt. Hood National Forest12,961
Lick CreekWallowa-Whitman National Forest1,956
Little SheepWallowa-Whitman National Forest5,238
Lonesome Meadow AppendageUmpqua National Forest930
LookingglassUmatilla National Forest4,859
Lookout MountainOchoco National Forest14,115
Maiden PeakWillamette National Forest9,627
Maiden PeakDeschutes National Forest26,432
Mill Creek Watershed (OR)Umatilla National Forest7,820
Mt. EmilyWallowa-Whitman National Forest8,421
Mt. JeffersonDeschutes National Forest2,282
Mt. BaileyUmpqua National Forest18,401
Mt. Hood AdditionsMt. Hood National Forest13,061
Myrtle SilviesMalheur National Forest11,679
North Fork MalheurMalheur National Forest18,069
North PaulinaDeschutes National Forest19,670
Opal CreekWillamette National Forest5,417
PotamusUmatilla National Forest5,389
ReservoirWallowa-Whitman National Forest13,641
Roaring RiverMt. Hood National Forest27,316
Rock CreekOchoco National Forest11,396
Rolling Grounds AppendageUmpqua National Forest1,987
Salmon - HuckleberryMt. Hood National Forest17,570
Shasta CostaSiskiyou National Forests14,420
SherwoodUmpqua National Forest2,449
Sky Lakes AWinema National Forest3,940
Sky Lakes BWinema National Forest9,615
Snake RiverWallowa-Whitman National Forest31,229
South Fork - TowerUmatilla National Forest16,570
South PaulinaDeschutes National Forest9,074
Taytáy CreekUmatilla National Forest4,047
Thirsty Creek AppendageUmpqua National Forest2,255
Twin LakesMt. Hood National Forest6,055
Twin MountainWallowa-Whitman National Forest58,533
Upper Catherine CreekWallowa-Whitman National Forest6,446
Upper Grande RondeWallowa-Whitman National Forest11,723
Waldo - FujiWillamette National Forest15,273
Waldo - MoolackWillamette National Forest1,183
Waldo - Salmon CreekWillamette National Forest3,195
Walla Walla RiverUmatilla National Forest34,416
West - South BachelorDeschutes National Forest25,994
Wind CreekMt. Hood National Forest5,438
South Dakota (1)
AreaForestAcres
Indian CreekBuffalo Gap National Grassland24,666
Utah (27)
AreaForestAcres
0419020Ashley National Forest355,684
418001Uinta National Forest5,697
418012Uinta National Forest25,758
418022Uinta National Forest17,289
418024Uinta National Forest51,699
418031Uinta National Forest18,173
418040Uinta National Forest1,702
Bullion - DelanoFishlake National Forest14,917
Burch CreekWasatch-Cache National Forest6,938
Clear CreekSawtooth National Forest7,188
Fishlake MountainFishlake National Forest25,217
High Uintas (UT)Wasatch-Cache National Forest102,398
HogsbackWasatch-Cache National Forest7,936
LakesWasatch-Cache National Forest121,967
Lone Peak ContiguousWasatch-Cache National Forest874
Mt. AireWasatch-Cache National Forest9,681
Mt. Logan SouthWasatch-Cache National Forest17,014
Mt. NaomiWasatch-Cache National Forest41,922
Mt. OlympusWasatch-Cache National Forest9,982
NoblettsWasatch-Cache National Forest3,116
Pine Valley MountainsDixie National Forest57,673
South FrancisWasatch-Cache National Forest3,374
Stump CreekCaribou National Forest355
Temple PeakWasatch-Cache National Forest24,081
Tushar MountainFishlake National Forest39,992
Twin PeaksWasatch-Cache National Forest6,157
White PineWasatch-Cache National Forest1,942
Vermont (1)
AreaForestAcres
Griffith Lake 09084Green Mountain and Finger Lakes National Forests1,833
Washington (52)
AreaForestAcres
Abercrombie - HooknoseColville National Forest33,862
Alpine Lakes Adj.Wenatchee National Forest57,104
Blue SlideWenatchee National Forest17,505
Boulder RiverMt Baker-Snoqualmie National Forest32,563
Canyon CreekWenatchee National Forest7,983
ChambersGifford Pinchot National Forest2,006
ChelanWenatchee National Forest74,650
Dark DivideGifford Pinchot National Forest52,483
Devils GulchWenatchee National Forest24,419
Dry Canyon BreaksColville National Forest4,821
Eagle RockMt Baker-Snoqualmie National Forest34,064
EntiatWenatchee National Forest72,617
Glacier Peak JMt Baker-Snoqualmie National Forest26,482
Glacier Peak KMt Baker-Snoqualmie National Forest47,269
Glacier Peak LMt Baker-Snoqualmie National Forest14,084
Goat Rocks AdjWenatchee National Forest6,108
Gotchen CreekGifford Pinchot National Forest7,518
Granite MountainOkanogan National Forest27,428
Grassy TopIdaho Panhandle National Forests13,485
Grassy TopColville National Forest10,302
Harvey CreekColville National Forest10,140
HorseshoeGifford Pinchot National Forest7,579
Jefferson RidgeOlympic National Forest6,512
Jupiter RidgeOlympic National Forest10,148
Liberty BellOkanogan National Forest108,495
Lion RockWenatchee National Forest4,692
Long DrawOkanogan National Forest3,922
Long SwampOkanogan National Forest66,344
ManastashWenatchee National Forest11,155
Mill Creek Watershed (WA)Umatilla National Forest16,747
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
NaneumWenatchee National Forest4,508
Nason RidgeWenatchee National Forest19,329
Norse PeakWenatchee National Forest10,169
Pasayten RimOkanogan National Forest17,074
PressentinMt Baker-Snoqualmie National Forest14,545
ProfanityColville National Forest28,944
QuartzWenatchee National Forest8,550
QuilceneOlympic National Forest18,656
Rock CreekWenatchee National Forest32,239
Salmo - Priest BColville National Forest11,869
SawtoothOkanogan National Forest122,194
TaneumWenatchee National Forest26,140
TeanawayWenatchee National Forest72,849
TiffanyOkanogan National Forest22,045
Twin LakesWenatchee National Forest22,496
Twin SistersColville National Forest13,051
Upper SkokomishOlympic National Forest9,311
White PassGifford Pinchot National Forest1,145
Wyoming (35)
AreaForestAcres
Beartooth Proposed WildernessShoshone National Forest16,837
Bridger PeakMedicine Bow-Routt National Forest6,697
Campbell LakeMedicine Bow-Routt National Forest7,088
Canyon CreekShoshone National Forest7,530
Dunoir Special Management UnitShoshone National Forest29,719
French CreekMedicine Bow-Routt National Forest5,928
Grayback RidgeBridger-Teton National Forest295,113
Gros Ventre MountainsBridger-Teton National Forest106,418
Illinois CreekMedicine Bow-Routt National Forest6,711
Lake Alice - Commissary RidgeBridger-Teton National Forest166,707
Laramie PeakMedicine Bow-Routt National Forest28,608
Libby FlatsMedicine Bow-Routt National Forest11,107
Little SnakeMedicine Bow-Routt National Forest9,920
Middle ForkMedicine Bow-Routt National Forest13,238
Middle ForkShoshone National Forest51,772
PalisadesTarghee National Forest1,121
Phillips RidgeBridger-Teton National Forest10,108
Platte River AdditionMedicine Bow-Routt National Forest7,962
ReefShoshone National Forest16,817
Rock CreekMedicine Bow-Routt National Forest18,874
Salt River RangeBridger-Teton National Forest235,661
Savage Run AdditionMedicine Bow-Routt National Forest2,368
Sheep MountainMedicine Bow-Routt National Forest17,626
Snowy RangeMedicine Bow-Routt National Forest29,660
South Beartooth HighwayShoshone National Forest105,570
South Wyoming RangeBridger-Teton National Forest85,776
Spread Creek - Gros Ventre RiverBridger-Teton National Forest166,097
Teton Corridor TrailheadsBridger-Teton National Forest286
Togwotee PassShoshone National Forest7,344
Walker PrairieBighorn National Forest62,434
West DunoirShoshone National Forest2,542
West Slope TetonsTarghee National Forest47,448
West Slope WindsBridger-Teton National Forest143,252
Wilderness Study AreaTarghee National Forest51,961
Winegar HoleTarghee National Forest247
References (12)
  1. Adhikari, B. and L. E. Wallace. 2014. Does the <i>Platanthera dilatata</i> (Orchidaceae) complex contain cryptic species or continuously variable populations? Plant Systematics and Evolution 300: 1465 - 1476.
  2. Flora of North America Editorial Committee (FNA). 2002a. Flora of North America north of Mexico. Vol. 26. Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York. xxvi + 723 pp.
  3. Global Biodiversity Information Facility (GBIF). 2025. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2025).
  4. iNaturalist. 2025. Online. Available: https://www.inaturalist.org (accessed 2025).
  5. 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.
  6. Native Plant Trust. 2025. Go Botany website. Online. Available: https://gobotany.nativeplanttrust.org (accessed 2025).
  7. NatureServe. 2025. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  8. North American Orchid Conservation Center (NAOCC). 2025. Go Orchids. Online. Available: http://goorchids.northamericanorchidcenter.org/ (accessed 2025).
  9. <p>NatureServe's Rapid Analysis of Rarity and Endangerment Conservation Assessment Tool (RARECAT). 2025. Version: 2.1.1 (released April 04, 2025).</p>
  10. Southwest Environmental Information Network (SEINet). 2025. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2025).
  11. Wallace, L. 2003. An evaluation of taxonomic boundaries in the <i>Plantanthera dilatata</i> (Orchidaceae) based on morphological and molecular variation. Rhodora 105: 322-336.
  12. Wildflower Center. 2017. Native Plant Database:<i> Platanthera dilatata</i>. Lady Bird Johnson Wildflower Center, University of Texas, Austin. Accessed: September 23, 2022. https://www.wildflower.org/plants/result.php?id_plant=PLDI3