: 1.21 $2024-03-28T20:07:57-7:0052.55.214.236searchRMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6867Timothy W. Chumley Irene Thien1997628179U.S.A.ColoradoFremont[location and coordinates withheld]19321945Along the open, sandy banks of the stream in pinyon-juniper. Phenology: spores.RMUSFS852914 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun151David Rosenthal1996727209U.S.A.WyomingParkNorthern Absaroka Area: Shoshone National Forest: Clearwater Creek drainage.-109.704644.505321342378Stream bottom with spruce forest and rocky volcanic slopes. Phenology: fruiting.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun40983B. E. Nelson1997626177U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Seminoe Mountains: along Seminoe or County Road 351 at the pass, ca 2 air mi NNW of Seminoe Dam; ca 31 air mi NE of Rawlins.-106.929142.180722682335Rocky-gravelly slopes with rock outcrops and limber pine woodland. Phenology: spores.RMUSFS855295 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun59462Ronald L. Hartman1997811223U.S.A.WyomingParkNorthern Absaroka Area: Bobcat Creek Trail.-109.523344.273319201981Douglas fir and limber pine slopes with openings of sagebrush and streamsides. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun57319B. E. Nelson2002711192U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: Forest Road 924 at Lodgepole Creek, ca 33 air mi W of Newcastle; ca 24 air mi SW of Upton.-104.870443.79921332Stream channel below the culverts. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun57969B. E. Nelson Peter Ebertowski2002813225U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: along Sand Creek above and below confluence with Coal Draw, ca 20 air mi NW of Bill; ca 46 air mi NNW of Douglas.-105.589243.392114661475Wet meadows and flats along stream channel. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun57973B. E. Nelson Peter Ebertowski2002813225U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: along Sand Creek above and below confluence with Coal Draw, ca 20 air mi NW of Bill; ca 46 air mi NNW of Douglas.-105.589243.392114661475Sandy silver sagebrush/grassland. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun58022B. E. Nelson Peter Ebertowski2002814226U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: along the Cheyenne River ca 2 air mi below confluence of Antelope Creek and Dry Fork Cheyenne River, ca 18.5 air mi NE of Bill; ca 50 air mi NNE of Douglas.-105.010743.427513041329Sand bars and sandy silt flats along the river. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun58048B. E. Nelson2002815227U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: along Little Thunder Creek ca 1 mi below Little Thunder Reservoir, ca 8 air mi SE of Wright; ca 43 air mi S of Gillette.-105.349243.685914481463Bench and low meadow areas along the stream. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun58155B. E. Nelson2002816228U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: along Antelope Creek at Phillips or Forest Road 973, ca 17 air mi N of Bill; ca 51 air mi N of Douglas.-105.170543.47061359Sand flats in the stream bottom. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun17507Ronald L. Hartman198477189U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Ferris Mountains: Sand Creek, ca 2 air mi SW of summit of Bear Mountain.-107.1183342.2380620732164Along stream through sand dunes. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1327Peter J. Ebertowski200277188U.S.A.WyomingCrookThunder Basin National Grassland and Vicinity: Cracker Creek on County Road 68, ca 25 air mi NNE of Weston; ca 40 air mi NNE of Gillette.-105.035544.746711891225Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1477Peter J. Ebertowski2002710191U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Black Thunder Creek on Keeline or Forest Road 930, ca 20 air mi E of Wright; ca 43 air mi SSE of Gillette.-105.089943.742613591365Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1532Peter J. Ebertowski2002711192U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Phillips Creek near bentonite mine, on dirt road ca 2 mi W of County Road 31, ca 23 air mi NNE of Glenrock; ca 34 air mi NNW of Douglas.-105.747643.178216091621Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1589Peter J. Ebertowski2002711192U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Cheyenne River Draw on County Road 31, ca 27 air mi NNE of Glenrock; ca 36 air mi NNW of Douglas.-105.688243.22115671579Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1675Peter J. Ebertowski2002713194U.S.A.WyomingNiobraraThunder Basin National Grassland and Vicinity: Lance Creek on County Road 13, ca 16.5 air mi NNE of Lance Creek; ca 45 air mi SSW of Newcastle.-104.582743.262512071213Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1756Peter J. Ebertowski2002715196U.S.A.WyomingCrookThunder Basin National Grassland and Vicinity: tributary of South Deer Creek on County Road 68, ca 12.5 air mi N of Moorcroft; ca 29 air mi ENE of Gillette.-104.973444.449813261341Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1896Peter J. Ebertowski2002717198U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: spring and head of Holmes Creek on Payne or Forest Road 934, ca 18 air mi SE of Wright; ca 26 air mi N of Bill.-105.229543.600914631496Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2057Peter J. Ebertowski2002722203U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Lightning Creek on County Road 43, ca 34 air mi NE of Douglas; ca 17 air mi ESE of Bill.-104.970843.140313321341Along creek. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2134Peter J. Ebertowski2002724205U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: Turner Creek on Forest Road 914, ca 11.5 air mi ESE of Upton; ca 16 air mi NW of Newcastle.-104.429844.020113201332Creek bank. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2322Peter J. Ebertowski2002727208U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: Piney Creek on Piney Creek or County Road 17, ca 24 air mi ESE of Wright; ca 27 air mi NNE of Bill.-105.069943.586814201445Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2340Peter J. Ebertowski2002729210U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Antelope Creek on Forest Road 949, ca 31 air mi SE of Wright; ca 17 air mi NNE of Bill.-105.070643.441813231332Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2362Peter J. Ebertowski2002729210U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: Cheyenne River on Dull Center or County Road 7A, ca 34 air mi ESE of Wright; ca 26 air mi NE of Bill.-104.910343.501812561283Streambank. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2441Peter J. Ebertowski2002731212U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: West Plum Creek on Plum Creek Road, ca 6.5 air mi NW of Newcastle; ca 21 air mi SE of Upton.-104.28943.935913531365Grassy creek floodplain with willow and cottonwood. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2537Peter J. Ebertowski200282214U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Wild Horse Creek on York or Forest Road 900, ca 27 air mi NNE of Gillette; ca 24 air mi N of Rozet.-105.217844.629212071234Creek bank and floodplain. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2637Peter J. Ebertowski200285217U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Stinking Water Creek on County Road 31, ca 34 air mi SSW of Wright; ca 42 air mi NNW of Douglas.-105.727843.306515821597Grassy creek bottom. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2708Peter J. Ebertowski200287219U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: Lodgepole Creek on Wyo Hwy 116, ca 30 air mi W of Newcastle; ca 17 air mi SSW of Upton.-104.790743.785113011314Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2844Peter J. Ebertowski2002813225U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: ravine S of and leading to Porcupine Creek on dirt road ca 0.5 mi W of Wyo Hwy 59, ca 9.5 air mi S of Wright; ca 29 air mi NNW of Bill.-105.468943.615114871542Grassy ravine. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2884Peter J. Ebertowski B. E. Nelson2002814226U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Cheyenne River from Sheep Creek to ca 1 mi downstream, ca 22 air mi NE of Bill; ca 54 air mi NNE of Douglas.-104.950843.45621292Bank near stream channel. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2965Peter J. Ebertowski2002815227U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: along Lodgepole Creek immediately below its confluence with Hay Creek, on Wyo Hwy 450, ca 24 air mi WSW of Newcastle; ca 27 air mi S of Upton.-104.67143.700112651280Low bank of creek. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3061Peter J. Ebertowski2002816228U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: Beaver Creek at lower end of Sixmile Basin on dirt road ca 0.7 air mi N of Wyo Hwy 450, ca 8.5 air mi WSW of Newcastle; ca 23 air mi SSE of Upton.-104.391743.79921189Creek bank with willow and grasses. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3265Peter J. Ebertowski2002819231U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: School Creek ca 1.5 air mi S of its confluence with Little Thunder Creek, on School Creek or Forest Road 968, ca 17 air mi ESE of Wright; ca 47 air mi SSE of Gillette.-105.189643.643414081426Wide flat creek bank dominated by Spartina and Cirsium. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun332Peter J. Ebertowski2002620171U.S.A.WyomingWestonThunder Basin National Grassland and Vicinity: Hay Creek and vicinity on Mush Creek or County Road 58, ca 27 air mi WSW of Newcastle; ca 21 air mi SSW of Upton.-104.730843.799213011314Creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun520Peter J. Ebertowski2002624175U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Antelope Creek on Forest Road 942, ca 28 air mi SE of Wright; ca 16.5 air mi NNE of Bill.-105.130543.456213381347On floodplain of creek. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4958Peter J. Ebertowski2003616167U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Piney Canyon on Piney Canyon or County Road 69, ca 22 air mi ESE of Wright; ca 48 air mi WSW of Newcastle.-105.109843.586814751542Meadow above and below spring. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5533Peter J. Ebertowski2003627178U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Belle Fourche River off Hilight or County Road 52, ca 16 air mi N of Wright; ca 22 air mi S of Gillette.-105.394943.97813871408Riverbank. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6554Peter J. Ebertowski2003711192U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Well Creek, on Stewart Road, ca 10 air mi WNW of Moorcroft; ca 18 air mi E of Gillette.-105.155744.31413041317Creek bank. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6733Peter J. Ebertowski2003714195U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Belle Fourche River, on Clarkelen Road, ca 13 air mi SW of Wright; ca 45 air mi SSW of Gillette.-105.688343.657615511570Grassy creek bed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6818Peter J. Ebertowski2003716197U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Rochelle Hills N of Wildcat Creek, on two-track road off Rochelle Hills or Forest Road 933, ca 19 air mi SE of Wright; ca 56 air mi SSE of Gillette.-105.113444.146414931536Meadow near spring. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6868Peter J. Ebertowski2003718199U.S.A.WyomingNiobraraThunder Basin National Grassland and Vicinity: Lance Creek, 0.5 mi S of confluence with Greasewood Creek on Greasewood or County Road 10, ca 37 air mi N of Lusk; ca 39 air mi SSW of Newcastle.-104.373343.29531155Roadside on floodplain with open canopy of cottonwoods. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7288Peter J. Ebertowski2003727208U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: ridge E of Short Creek, on road continuing Forest Road 1246, ca 34 air mi NW of Moorcroft; ca 24 air mi N of Gillette.-105.444.629212431371Bank along spring. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7812Peter J. Ebertowski200387219U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Little Thunder Creek, on Wyo Hwy 450, ca 18 air mi ESE of Wright; ca 48 air mi WSW of Newcastle.-105.149743.671813781384Creek bank. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7872Peter J. Ebertowski200388220U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Brown Springs Creek, on two-track off Ross or County Road 31, ca 32 air mi NW of Douglas; ca 22 air mi NNE of Glenrock.-105.727843.149616091676Creek bank with redtop and sedge spp. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7934Peter J. Ebertowski200389221U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: Porcupine Creek, on two-track off Matheson or County Road 70, ca 13 air mi SE of Wright; ca 49 air mi S of Gillette.-105.369143.600914451454Low creek bank. Phenology: spores.RMRM600056 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun38784Ronald L. Hartman1993627178U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Wyoming Game and Fish Access on North Platte River, ca 6.5 air mi E of Glenrock.-105.745942.84041500Riverside and sandy parking lot and flats slightly uphill. Phenology: spores.RMRM753520 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun14531Erwin F. Evert1988614166U.S.A.WyomingPark[location and coordinates withheld]2164Around ponds at end of dirt road in the open. Phenology: flowering & fruiting.RMRM618833 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun18658Erwin F. Evert199068159U.S.A.WyomingPark[location and coordinates withheld]1426Gully bottom along irrigation runoff channel with Cirsium arvense, Carex lanuginosa, Poa pratensis, Smilacina stellata, and Elaeagnus angustifolia.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun20232Erwin F. Evert1990811223U.S.A.MontanaGallatinMadison Range: Spanish Peaks area: Gallatin National Forest: along Deer Creek Trail, ca 3-4 mi W of U.S. Highway 191, ca 26 mi SSW of Bozeman.-111.260545.327623472439Moist spruce-fir forest in creek bottom, prominent understory species include Alnus viridis and Ledum glandulosum.RM779832 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun22654Erwin F. Evert1992610162U.S.A.MontanaCarbon[location and coordinates withheld]1349Open wet soil along spring run with Carex nebrascensis, Carex praegracilis, Berula erecta and Scirpus pungens.RM779762 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun22736Erwin F. Evert1992611163U.S.A.MontanaStillwater[location and coordinates withheld]1097Weedy riparian area with Salix amygdaloides, Acer negundo, Populus deltoides and Medicago lupulina.RMRM753884 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun22778Erwin F. Evert1992612164U.S.A.MontanaStillwaterAlong south side of the Stillwater River at Cliff Swallow fishing access and campground, ca 10 mi W of Absarokee.-109.634545.51611341Riparian area in wet soil with Salix bebbiana and Equisetum laevigatum. Phenology: spores.RMRM753884 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun23023Erwin F. Evert1992621173U.S.A.MontanaPark[location and coordinates withheld]1509Disturbed marsh and wet roadside with Typha latifolia, Cirsium arvense, Carex rostrata, and Salix bebbiana. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun23316Erwin F. Evert199276188U.S.A.IdahoTeton[location and coordinates withheld]1844Wet meadow/marsh on peaty/marly substrate with Muhlenbergia richardsonis, Pentaphylloides floribunda, Thalictrum alpinum, Triglochin maritimum, and Deschampsia cespitosa.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun23687Erwin F. Evert1992715197U.S.A.MontanaGallatinMadison Range: Gallatin National Forest: Teepee Basin: ca 20 mi N of West Yellowstone.-111.164244.892515Wet meadow/marsh with Deschampsia cespitosa, Alium schoenoprasum, Salix wolfii, Carex vesicaria, and Gentianopsis detonsa.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun24771Weedy, riparian area west of road and creek with Populus angustifolia, Cornus stolonifera, and Viola canadensis.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun25159Erwin F. Evert1993619170U.S.A.IdahoFremontSnake River Plains: along west side of Sand Creek ca 14 mi NNE of St Anthony.-111.585344.12261615Riparian area along creek with Populus balsamifera, Populus tremuloides, Carex lanuginosa, and Lycopus americanus.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun26231Erwin F. Evert1993724205U.S.A.IdahoTeton[location and coordinates withheld]1798Disturbed meadow with Arenaria congesta, Rudbeckia occidentalis, and Elymus cinereus.RMRM780418 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun27143Erwin F. Evert1994618169U.S.A.MontanaMadisonMeadow Lake Fishing Access and Campground along northeast shore of Ennis Lake, ca 2 mi E of McAllister.-111.588445.44331469Disturbed ground and road with Melilotus officinalis, Dactylis glomerata, and Poa pratensis. Phenology: fruiting.RMRM780765 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun27662Erwin F. Evert199476187U.S.A.WyomingTeton[location and coordinates withheld]2073Extensive meadows just W of river with Delphinium occidentale, Ligusticum filicinum, and Collomia linearis. Phenology: flowering.RMRM783702 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun29643Erwin F. Evert1995625176U.S.A.WyomingFremontSoutheastern Absarokas: Shoshone National Forest: along the southeast side of Horse Creek ca 1/3 mi NE of Horse Creek Campground, ca 10 mi N of Dubois.-109.6269443.67582353Riparian/gravel bar community with Juncus balticus, Polemonium pulcherrimum, Equisetum variegatum, and Antennaria corymbosa. Phenology: buds.RMRM788059 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun30903Erwin F. Evert199665157U.S.A.MontanaCarbonBeartooth Range foothills: ridge ca 1/4 mi E of East Rosebud Creek, 3 mi S of Roscoe.-109.513745.31031646Open, aspen-ponderosa pine woodland with Viola canadensis, Claytonia lanceolatea, and Smilacina stellata. Phenology: vegetative only.RMRM787058 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun31101Erwin F. Evert1996614166U.S.A.MontanaGallatinAlong East Gallatin River just N of the Burlington Northern tracks, 3 mi E of Bozeman.-110.971445.66161493Disturbed railroad right-of-way and cutbanks. Phenology: spores.RMRM787610 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun31374Erwin F. Evert1996621173U.S.A.MontanaParkAbsaroka Mountains foothills: Gallatin National Forest: Eagle Creek recreation site, ca 1 1/2 mi NE of Gardiner, just N of Jardine Road.-110.688545.0513Wet area adjacent to creek with Iris missouriensis, Carex praegracilis, and Salix bebbiana. Phenology: vegetative only.RMRM787824 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun31963Erwin F. Evert199679191U.S.A.WyomingTetonGros Ventre Mountains: Bridger-Teton National Forest: along Gros Ventre Road (Forest Road 30400) at Little Cow Creek, 30 mi E of Jackson.-110.217943.492320Riparian community W of road with Pedicularis groenlandica, Salix wolfii, and Deschampsia cespitosa. Phenology: vegetative only.RMRM818316 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32927Erwin F. Evert1997611162U.S.A.MontanaCarbonAlong Monahan Road just N of intersection with County Road 421, 1.3 mi W of Joliet.-108.996945.4871189Along roads and irrigation ditch with Equisetum arvense and Fraxinus pennsylvanica. Phenology: vegetative only.RMRM818350 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32962Erwin F. Evert1997611162U.S.A.MontanaCarbonAlong the east side of the Clarks Fork Yellowstone River and railroad tracks, ca 4 mi N of Fromberg.-108.85345.45781057Gravel with Equisetum laevigatum and Cardaria draba. Phenology: vegetative only.RMRM818635 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun33233Erwin F. Evert1997622173U.S.A.WyomingHot SpringsOwl Creek Mountains: lower end of the Wind River Canyon, along U.S. Hwy 20/Wyo Hwy 789, 4 mi S of Thermopolis.-108.205843.59081350Weedy, rocky riparian area along the river with Bromus inermis, Asclepias speciosa, and Cirsium arvense. Phenology: fruiting.RMRM819584 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun33683Erwin F. Evert1997710191U.S.A.IdahoFremontSnake River Plains: boating access along the east side of the Henrys Fork River, 2.6 mi W of Ashton.1585Wet soil of riparian community with Eleocharis palustris, Salix exigua, and Typha latifolia. Phenology: fruiting.RMRM819382 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun34023Erwin F. Evert1997722203U.S.A.MontanaMadisonMadison Valley: South Madison Fishing Access along the east side of the Madison River, ca 25 mi S of Ennis.1731Wet sedge meadow with Carex nebrascensis, Deschampsia cespitosa, Iris missouriensis, and Triglochin maritimum. Phenology: vegetative only.RMRM820253 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun34777Erwin F. Evert199862153U.S.A.MontanaCarbonWolf Canyon 1 mi S of the Yellowstone River, ca 14 mi WSW of Laurel.-109.038145.58891067Canyon bottom along stream with Betula occidentalis, Carex nebrascensis, and Eleocharis palustris. Phenology: vegetative only.RMRM820579 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun35437Erwin F. Evert199871182U.S.A.MontanaParkYellowstone National Park: northwest side of Mt. Everts, 3 mi SE of Gardiner.-110.66845.00772195Wet swale and border of small lake with Carex rostrata, Hierochloe odoratoa, and Potentilla fruticosa. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun69767B. E. Nelson James F. Fowler2006824236U.S.A.ArizonaCoconinoCoconino National Forest: frontage road (old U.S. Hwy 66) along I-40 on Bellemont Flat, just W of Bellemont Exit and just N of Camp Navajo Army Depot, ca 10.5 air mi WNW of Flagstaff.-111.828435.24262173Wet clay soil in a barrow pit-scraped area. Phenology: vegetative only.RMRM822308 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun36527Erwin F. Evert199964155U.S.A.MontanaStillwaterCoal Mine Coulee, ca 10 mi SE of Columbus.-109.140945.57431128Along creek in wet soil with Glyceria striata, Eleocharis palustirs, and Carex nebrascensis. Phenology: fruiting.RMRM822814 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun36980Erwin F. Evert1999710191U.S.A.WyomingParkAbsaroka Mountains: Yellowstone National Park: along Slough Creek Trail, ca 3 mi NE of trailhead.-110.24744.95042012Meadow openings in coniferous forest with Melica spectabilis, Stipa richardsonii, Hedysarum sulphurescens, and Helianthella uniflora. Phenology: fruiting.RMRM823121 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun37372Erwin F. Evert1999728209U.S.A.WyomingTetonTeton Range: Targhee National Forest: along the south side of Moose Creek, ca 6 mi SE of Victor, ID.-111.054543.5622027Riparian community with Cornus sericea, Equisetum arvense, and Aconitum columbianum. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun62689B. E. Nelson2004815228U.S.A.ColoradoArchuletaEastern San Juan Mountains: northeast end of Mesa Cortado, S of U.S. Hwy 84, ca 17.5-18 air mi SE of Pagosa Springs.-106.850537.072723782530Gambels oak/Rocky Mountain juniper slope with scattered ponderosa pine. Phenology: vegetative only.RMRM796514 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3571Jeanette Flaig Kurt Flaig2004530151U.S.A.ColoradoSaguacheEastern San Juan Mountains: Rio Grande National Forest: House Log Creek, Forest Road 41G, 21 air mi W of Saguache.-106.367938.08872635Mesic meadow and creek. Phenology: vegetative only.RMRM796513 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4098Jeanette Flaig2004614166U.S.A.ColoradoSaguacheEastern San Juan Mountains: Rio Grande National Forest: Seitz Creek, Forest Road 650, 14 air mi NW of Del Norte; S of Cyclone Mountain.-106.523737.7972680Creekside. Phenology: vegetative only.RMRM796512 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6158Jeanette Flaig2004717199U.S.A.ColoradoHinsdaleEastern San Juan Mountains: Rio Grande National Forest: Forest Road 520, Rio Grande Reservoir, ca 29 air mi WSW of Creede.-107.310437.734729313007Upslope from reservoir on south-facing slope in aspen forest with rocky outcrops. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun79671Ronald L. Hartman2004715197U.S.A.ColoradoArchuletaEastern San Juan Mountains: Rio Grande National Forest: campground on Rio Chama W ca 1 air mi along Archuleta Creek.-106.553637.03226762804Spruce/fir and aspen forest on slopes, alder and willow along streams; along the creek. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun85Erin Foley B. E. Nelson and Michael Foley2003612163U.S.A.ColoradoGrandArapaho National Forest: Front Range: Rabbit Ears Range: along Buffalo Creek, ca 1.7 air mi W of Willow Creek and Colo Hwy 125, ca 13 air mi N of Hot Sulphur Springs.-106.102340.255526702792Along the creek, road, and in soggy mossy areas. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10445Erin Foley2004720202U.S.A.ColoradoGrandGore Range: Red Dirt Reservoir, ca 14.5 air mi NW of Kremmling and ca 16 air mi NE of Toponas.-106.570540.195827592768Seep on slope of fine clay sediment adjacent to creek. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11795Erin Foley2004818231U.S.A.ColoradoGrandMiddle Park: S of Colorado River, ca 1.5 air mi W of Parshall and ca 10.5 air mi E of Kremmling.-106.205240.052222862463Along fork. Phenology: flowering.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5949Erin Foley2004521142U.S.A.ColoradoGrandGore Range: ca 0.5 mi N of Radium along the Colorado River.-106.5539.9592073Along river and sandy flats. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6133Erin Foley2004525146U.S.A.ColoradoGrandMiddle Park: Mount Hurd, ca 8 air mi SE of Granby and ca 1 air mi NE of Tabernash.-105.83339.999725602695Wet depression at foot of sagebrush hill. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun84626Ronald L. Hartman2006920263U.S.A.ArizonaCoconinoCoconino National Forest: split in Forest roads 96 and 95 in bottom of East Clear Creek.-111.162234.5520012012Creek bottom. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6691Erin Foley200462154U.S.A.ColoradoGrandMiddle Park: just W of Troublesome Creek, ca 10.5 air mi NE of Kremmling and ca 9.5 air mi NW of Parshall.-106.300340.188824392576Along creek. Phenology: flowering.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7125Erin Foley200468160U.S.A.ColoradoGrandMiddle Park: just N of Colorado River, off U.S. Hwy 40 between Sulphur Gulch and Rock Creek, ca 7 mi W of Hot Sulphur Springs and 8.5 air mi WNW of Kremmling.-106.230840.066322712426Moist areas of intermittent flow near railroad tracks. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7394Erin Foley2004610162U.S.A.ColoradoGrandArapaho National Forest: Middle Park: Beaver Creek Road, ca 6 air mi SE of Hot Sulphur Springs and ca 8.5 air mi SW of Granby.-106.041440.007924392576Mixed coniferous forest along creek and adjacent meadow. Phenology: flowering.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7839Erin Foley2004617169U.S.A.ColoradoGrandMiddle Park: Rock Creek, ca 3 air mi NW of Parshall and ca 10 air mi ENE of Kremmling.-106.213640.09022317Along creek and adjacent fine sediment, sloping banks. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7929Erin Foley2004617169U.S.A.ColoradoGrandWindy Gap, ca 2.5 air mi NW Granby and ca 7.5 air mi NE of Hot Sulphur Springs.-105.977640.110724082451Riparian seep dominated by Carex ssp.; adjacent to sagebrush. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9201Erin Foley200475187U.S.A.ColoradoGrandArapaho National Forest: Middle Park: just S of U.S. Hwy 40, ca 4 air mi WNW of Granby and ca 5.5 air mi NE of Hot Sulphur Springs.-105.993440.103123782463Moist pasture along road. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9720Erin Foley2004710192U.S.A.ColoradoGrandMiddle Park: Sulphur Gulch, ca 6 air mi WNW of Kremmling and ca 9 air mi W of Hot Sulphur Springs.-106.273740.07062317Gulch. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1417James F. Fowler C. L. May1993621172U.S.A.ColoradoMoffatDinosaur National Monument: Limestone Hanging Garden, Limestone Canyon.1783Hanging garden.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun172James F. Fowler C. L. May and Jon Hak199179190U.S.A.UtahWashingtonZion National Park: Court of the Patriarchs Hanging Garden, Zion Canyon.1448Hanging garden.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun173James F. Fowler C. L. May and Jon Hak199177188U.S.A.UtahWashingtonZion National Park: Court of the Patriarchs Hanging Garden, Zion Canyon.1448Hanging garden.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun174James F. Fowler C. L. May and Jon Hak199179190U.S.A.UtahWashingtonZion National Park: Court of the Patriarchs Hanging Garden, Zion Canyon.1448Hanging garden.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun463James F. Fowler C. L. May and Jon Hak1992524145U.S.A.UtahGarfieldCapitol Reef National Park: Sidewall Hanging Garden, Halls Creek Narrows.1253Hanging garden.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun562James F. Fowler C. L. May and Jon Hak1992528149U.S.A.UtahWashingtonZion National Park: Menu Falls Hanging Garden, Zion Canyon.1372Hanging garden.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun891James F. Fowler C. L. May and Jon Hak1992611163U.S.A.UtahSan JuanGlen Canyon National Recreation Area: Hook Hanging Garden, Ribbon Canyon.1268Hanging garden.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun31067B. E. Nelson Laura Welp199465156U.S.A.WyomingSweetwaterGreat Divide Basin Area: Great Divide Basin: along Lost Soldier Creek on Bairoil or County Road 22, ca 4.5 air mi W of Bairoil, ca 42 air mi NNE of Wamsutter; ca 36.5 air mi NW of Rawlins.-107.624242.224721892207Moist meadows along creek. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1060Laura Welp1994623174U.S.A.WyomingCarbonGreat Divide Basin Area: Great Divide Basin: Scotty Canyon along Atlantic Rim, ca 17 air mi SW of Rawlins; ca 11 air mi WSW of Chokecherry Knob.-107.42388941.62694422862347Open creek bottom; dense graminoids dominant, forbs diverse; moist, compact, peat soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1103Laura Welp1994623174U.S.A.WyomingCarbon[location and coordinates withheld]21582182Moist area near small, shallow pond and drainage. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1217Laura Welp1994625176U.S.A.WyomingCarbonGreat Divide Basin Area: Great Divide Basin: perimeter and drainage of Little Sand Spring, ca 10 air mi ESE of Lamont; ca 9 air mi NW of Table Mountain.-107.293342.181421032115Side of spring; dense graminoids dominant; wet peaty soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1281Laura Welp1994626177U.S.A.WyomingCarbon[location and coordinates withheld]20272042Edge of creek; graminoids dominant, forbs diverse; wet, organic soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1630Laura Welp199474185U.S.A.WyomingFremontGreat Divide Basin Area: Sweetwater River Drainage: Ice Slough and adjacent sand dunes, ca 10 air mi E of Sweetwater Station; ca 10.5 air mi SSW of Tin Cup Mountain.-108.037242.516119571960Slough running through low hills; dense grasses and Juncus dominant; wet, compact clay soil with salt deposits. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1815Laura Welp199476187U.S.A.WyomingFremont[location and coordinates withheld]22012219Side of slough and associated drainage on north-facing slope; grazed graminoids dominant, forbs diverse; moist, silty, rocky soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1997Laura Welp1994711192U.S.A.WyomingFremontGreat Divide Basin Area: Popo Agie River Drainage: Meadow Gulch and adjacent boulder slopes, ca 10 air mi W of Sweetwater Station; ca 4 air mi NE of Schoettlin Mountain.-108.352242.575619812073Banks of creek; graminoids dominant near water, sagebrush dominant on banks; moist, organic soil.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2113Laura Welp1994712193U.S.A.WyomingFremontGreat Divide Basin Area: Popo Agie River Drainage: along Omera Spring and adjacent slope, ca 2.5 air mi N of Roundtop Mountain; ca 7 air mi SSE of Young Mountain.-108.709242.558324022408Open edge of spring; wet, compact, mucky soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2390Laura Welp1994716197U.S.A.WyomingCarbonGreat Divide Basin Area: Great Divide Basin: spring and adjacent hills at base of Ferris Mountains, ca 12.5 air mi E of Lamont; ca 5.5 air mi NW of Ferris.-107.254442.238623102384Small spring in low hills at base of mountain; moist, compact, red clay soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2998Laura Welp1994727208U.S.A.WyomingSweetwaterGreat Divide Basin Area: Great Divide Basin: Bush Rim, ca 7.5 air mi NW of The Pinnacles; ca 10 air mi S of Oregon Buttes.-108.846442.083922562286On sagebrush flats above small spring; dry fine rocky soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3470Laura Welp1994811223U.S.A.WyomingFremontGreat Divide Basin Area: Sweetwater River Drainage: Sweetwater River, ca 11.5 air mi SW of Atlantic City; ca 11.5 air mi NW of Continental Peak.-108.877242.37032260Open meadow along bank of stream; dense ungrazed graminoids dominant. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3599Laura Welp1994815227U.S.A.WyomingFremontGreat Divide Basin Area: Sweetwater River Drainage: Rock Creek, ca 6 air mi W of Radium Springs; ca 8 air mi SE of Atlantic City.-108.603942.35642231Along trail near creek; graminoids dominant; dry rocky soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun619Laura Welp1994618169U.S.A.WyomingSweetwaterGreat Divide Basin Area: Great Divide Basin: along Bush Rim, ca 8.5 air mi S of Oregon Butte; ca 7.5 air mi NW of the Pinnacles.-108.818342.127522012237Shaded, running spring; aspen in overstory, dense graminoids in understory, diverse forbs; wet, peaty soil. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun742Laura Welp1994618169U.S.A.WyomingFremontGreat Divide Basin Area: Sweetwater River Drainage: Dickie Spring and moist drainage, ca 4.5 air mi N of Oregon Buttes; ca 8 air mi WNW of Continental Peak.-108.855842.30082335Moist edge of spring; dense grasses and Juncus dominant, forbs diverse; moist, peaty soil, sandy in some areas. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun46052Ronald L. Hartman1994621172U.S.A.WyomingCarbonGreat Divide Basin Area: Great Divide Basin: Willow Hill area, ca 13 air mi NW of Rawlins.-107.33722241.96583321032164Limestone and sandstone outcrops, sandy and clay slopes with stream and pond below. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun46260Ronald L. Hartman1994621172U.S.A.WyomingFremontGreat Divide Basin Area: Green Mountain, ca 7 air mi W of Muddy Gap.-107.609742.354721342256Streamside, rocky slopes, and lodgepole pine covered slopes. Phenology: flowering & fruiting.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7139Laura Welp199583215U.S.A.WyomingFremontGreat Divide Basin Area: Green Mountain: ca 5.5 air mi SE of Jeffrey City; ca 9 air mi NE of Crooks Peak.-107.782242.441119511981Moist narrow draw with grasses in sandstone hills. Phenology: flowering.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun45768Ronald L. Hartman Tom Cramer1994529149U.S.A.WyomingTetonGros Ventre Area: road to Granite Falls, ca 3.4 road mi from U.S. Hwy 191/189.-110.469443.29952256Grassy slopes near lodgepole pine and stream bottom. Phenology: fruiting.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun46367Ronald L. Hartman1994623174U.S.A.WyomingSubletteGros Ventre Area: Slide Creek, ca 9 air mi E of Bondurant.-110.235843.19123712408Shaley to sandy slopes and willow bottoms with stands of spruce. Phenology: fruiting.RMRM624571 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun47191Ronald L. Hartman199477188U.S.A.WyomingTetonGros Ventre Area: Little Granite Creek Pack Trail: from trail head to Wilderness boundary.-110.508543.328120422134Streamside and coniferous forests. Phenology: spores.RM658983 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun52452Ronald L. Hartman Stuart Markow1995723204U.S.A.WyomingSubletteGros Ventre Area: ca 5 air mi NW of Bondurant.-110.469443.24232256Along river. Phenology: spores.RMRM147056 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2172Aven Nelson Ruth A. Nelson1935528148U.S.A.New MexicoBernalilloOutskirts of Albuquerque.-106.6521935.084614931798Phenology: spores.RM658980 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun51031Ronald L. Hartman Stuart Markow1995622173U.S.A.WyomingTetonMount Leidy Highland Area: South Fork Ditch Creek, ca 0.2-1 air mi upstream from Ditch Creek Road.-110.556543.691622252271Moist stream bottom. Phenology: spores.RM658981 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun51515Ronald L. Hartman1995628179U.S.A.WyomingTetonMount Leidy Highland Area: Dry Cottonwood Creek, 1-2 air mi upstream; 2-3 air mi E of east end of Upper Slide Lake.-110.257743.590822562317Stream bottom and benches. Phenology: spores.RM658982 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun51788Ronald L. Hartman1995714195U.S.A.WyomingTetonMount Leidy Highland Area: Spread Creek, ca 5 air mi SW of Black Rock Ranger Station.-110.417143.77822252286Bluffs overlooking creek, often sandy, slopes and along creek, and wooded areas. Phenology: spores.RM658984 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun52986Ronald L. Hartman1995724205U.S.A.WyomingTetonMount Leidy Highland Area: 2-3 air mi ENE of East Leidy.-110.317543.734824692530Streamside and meadow. Phenology: spores.RM658985 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun53044Ronald L. Hartman1995724205U.S.A.WyomingTetonMount Leidy Highland Area: ca 1.5-2 air mi E of East Leidy.-110.337443.70625002591Meadow. Phenology: spores.RM658987 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun53973Ronald L. Hartman1995820232U.S.A.WyomingTetonMount Leidy Highland: Flat Creek, 1 air mi NW to 1 air mi S of Flat Creek Ranch.-110.556543.533222252286Along trail through woods and along lake. Phenology: spores.RMRM785767 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun36864Loy R. Phillippe Richard L. Larimore, J. L. Crane, Daniel T. Busemeyer2004614166U.S.A.WyomingWashakieTensleep Preserve, The Nature Conservancy: southwest flank, foothills of the Big Horn Mountains, ca 10 mi E of Ten Sleep; Billy Creek off of Upper Canyon Creek Canyon along Billy Creek Trail at spring. Monument Hill quad.43.99542042Growing in canyon on southwest-facing slope along spring, with Geum macrophyllum, Glyceria striata, Heracleum sphondylium, Mertensia, Prunus virginiana, Ranunculus macounii, Salix bebbiana, etc.; growing at slightly dryer area along edge of spring. Phenology: spores.RMRM785893 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2677Mary Ann Feist Loy R. Phillippe, Daniel T. Busemeyer, Paul Marcum, Richard T Larimore2004616168U.S.A.WyomingWashakieTensleep Preserve, The Nature Conservancy: southwest flank, foothills of the Big Horn Mountains, ca 10 mi E of Ten Sleep. Monument Hill quad.-107.23143.9851857Grassy opening in valley along small stream with Populus tremuloides, Prunus virginiana, Acer negundo, Ribes sp., Mertensia sp., Urtica dioica, Galium boreale, Poa pratensis, Collomia linearis, Stellaria longifolia, Cynoglossum officinale, Bromus inermis Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3365Emily A. Holt Brian Elliott200086219U.S.A.ColoradoEagleCentral Colorado: Sawatch Range, West Slope Continental Divide: along East Lake Creek, ca 8 air mi SSW of Avon.-106.561239.541929263109Spruce-fir forest. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1620Amy J. Roderick199773184U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: Middle Fork Sage Hen Creek S of Beaver Divide and W of Rattlesnake Hills, 21.2 road mi NE along Agate Flat or BLM Road 2404 from U.S. Hwy 287.-107.474842.758921952210Riparian area along creek. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun51105B. E. Nelson2000720202U.S.A.IdahoValleyPayette National Forest and Vicinity: Long Valley: along the North Fork Payette River at Hartsell Bridge, ca 8.5 air mi SSW of McCall; ca 5 air mi NW of Donnelly.-116.138144.79561481Sandy river bottom with overflow channels and woodland patches. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3937Joy Handley2000520141U.S.A.IdahoAdamsPayette National Forest and Vicinity: Hells Canyon-Seven Devils Scenic Area: Kinney Creek Trail (Forest Service Trail 221), ca 9 air mi N of Bear; ca 24 air mi NW of New Meadows.-116.707945.14395181036Dry basalt canyon with creek. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4161Joy Handley2000523144U.S.A.IdahoAdamsPayette National Forest and Vicinity: Weiser River Valley: along old U.S. Hwy 95 S of Fruitvale, ca 4.5-5.5 air mi N of Council; ca 14 air mi SSW of New Meadows.-116.421544.7956914Roadside grass and shrubland. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5197Joy Handley Denise L. Fairbanks2000611163U.S.A.IdahoAdamsPayette National Forest and Vicinity: Cuddy Mountains: Goodrich Creek Research Natural Area: along Goodrich Creek, ca 9 air mi SW of Council; ca 8 air mi NNE of Cambridge.-116.603744.67989451178Roadside riparian area in grass and shrub rangeland. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7451Joy Handley Erin Peters200081214U.S.A.IdahoWashingtonPayette National Forest and Vicinity: Weiser River Valley: Burton Lane ditch just S of U.S. Hwy 95, ca 1 air mi SE of Cambridge; ca 16 air mi SW of Council.-116.664444.5639807Weedy roadside irrigation ditch. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7903Joy Handley Erin Peters200084217U.S.A.IdahoIdahoPayette National Forest and Vicinity: Salmon River Mountains: Warren Airstrip, just NW of Warren, ca 20 air mi NW of Big Creek Guard Station; ca 23 air mi NNW of Yellow Pine.-115.686245.27631798Airstrip with gravel parent material, tailing piles, and ponds. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun491Joy Handley1999618169U.S.A.IdahoAdamsPayette National Forest and Vicinity: Lick Creek Riparian Demonstration Area: south bank of tributary of Lick Creek to fence, ca 16 air mi W of New Meadows; ca 20.5 air mi NNW of Council.-116.605944.998913411432Creekside; overstory of Picea engelmannii, Pinus contorta, and P. ponderosa, with Salix and Crataegus douglasii. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun171Open meadow dominated by grasses, forbs, and willows. Phenology: spores.RMRM760942 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4080D. L. Bleakly2001813225U.S.A.New MexicoGuadalupeSanta Rosa: La Pradira Ave. (Blue Hole Road).-104.6771934.939791390Roadside ditch wetlands. Phenology: flowering & fruiting.RMRM573084 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1058Nancy Kastning David Culp198886219U.S.A.WyomingCarbonSierra Madre/Park Range: Sierra Madre: ca 9 air mi NNW of Blackhall Mountain, along the Encampment River.-106.786741.13922469Riverine. Phenology: vegetative only.RMRM573085 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun240Nancy Kastning Heather and Joel Kastning1988616168U.S.A.WyomingCarbonSierra Madre/Park Range: Sierra Madre: Battle Creek, ca 8 air mi ENE of Battle Mountain.-107.164341.0842217Sagebrush-grassland. Phenology: spores.RMRM646271 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2153Thomas Cramer1994720201U.S.A.WyomingLincolnSouthern Salt River Range and Vicinity: vicinity of Coal Creek, ca 14 air mi N of Border Junction.-110.911742.416620122195Meadows, mudflats, and sagebrush along Coal Creek. Phenology: spores.RMRM607880 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4715Thomas Cramer Ronald L. Hartman1994823235U.S.A.WyomingLincolnSouthern Salt River Range and Vicinity: Hams Fork, ca 2.5 air mi S of Kemmerer.-110.528641.75312088Riverside meadows, willows, and sagebrush. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1805Amy J. Roderick199775186U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Ferris Mountains: south side below Youngs Pass, ca 31 air mi N of Rawlins; ca 11 air mi SE of Three Forks Junction.-107.299142.2532240Creek through sagebrush. Phenology: spores.RM776883 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5861Kevin J. Taylor199864155U.S.A.ColoradoGunnisonNorthern Gunnison Basin: along Elk Creek, ca 13.5 air mi WSW of Gunnison.-107.175238.506923472439Sagebrush hills and along creek; Populus angustifolia, Ribes, Salix, Pentaphylloides, and Amelanchier. Phenology: flowering.RM776882 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8528Kevin J. Taylor1998715196U.S.A.ColoradoGunnisonNorthern Gunnison Basin: along Smith Fork Creek, ca 6.5 air mi ENE of Crawford.-107.489438.71962240Along creek. Phenology: vegetative only.RM776881 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8913Kevin J. Taylor John Gutrich1998720201U.S.A.ColoradoGunnison[location and coordinates withheld]2286Uplands near constructed wetland along river. Phenology: vegetative only.RM776880 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9424Kevin J. Taylor1998725206U.S.A.ColoradoGunnisonNorthern Gunnison Basin: ca 4.5 air mi ESE of Parlin.-106.647738.49232469Wet drainage (no surface water); Salix and Pentaphylloides. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1929Amy J. Roderick199779190U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: public access to Big Creek, ca 17 air mi SE of Encampment; ca 7.6 air mi N of Colorado.-106.5241.09612347Riparian area along creek. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun377Gwen Kittel198982214U.S.A.ColoradoLarimerRiparian Plants of the Cache la Poudre River: Home Moraine, ca 32 mi W of Teds Place on Colo Hwy 14.2329Meanders behind moraine, low wet floodplain with willow-lined old overflow channels.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun60780B. E. Nelson Grace Kostel2004517138U.S.A.NebraskaDawesOglala National Grassland and Vicinity: along Sand Creek between Toadstool Road and railroad tracks, ca 8.5 air mi NNE of Crawford.-103.464742.79591109Disturbed area between railroad and county road. Phenology: vegetative only.RMUSFS400689 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4313Elbert L. Little Jr.1937811223U.S.A.ArizonaGilaTonto National Forest: Rose Creek, near Weiwer Ranch.-110.978833.841515245 degree north slope; moist alluvial soil with boulders; with Alnus, Equisetum arvense and Carex; edge of creek; common locally. Phenology: spores.RMUSFS400692 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4313Elbert L. Little Jr.1937811223U.S.A.ArizonaGilaTonto National Forest: Rose Creek, near Weiwer Ranch.-110.978833.841515245 degree north slope; moist alluvial soil with boulders; with Alnus, Equisetum arvense and Carex; edge of creek; common locally. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1449Grace M. Kostel200464156U.S.A.South DakotaCusterBuffalo Gap National Grassland and Vicinity: ca 10-10.5 air mi ESE of Fairburn, S of County Road 18 in French Creek.-103.00833343.652667884In clay soil along creek and creek banks. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1823Grace M. Kostel200468160U.S.A.NebraskaSiouxOglala National Grassland and Vicinity: ca 18-18.5 air mi NW of Crawford and 0.5 mi N of Orella Road, Whitehead Creek.-103.64783342.8718331006West side drainage of creek. Phenology: vegetative only.RMUSFS400913 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun774Elbert L. Little Jr. J. W. R. Engholm193474185U.S.A.New MexicoDona AnaJornada Experimental Range: Ash Spring.-106.5461932.63559170710 degree south slope; moist loam; with Eleocharis and Carex; edge of canyon bottom; uncommon. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2156Grace M. Kostel2004614166U.S.A.NebraskaSiouxOglala National Grassland and Vicinity: ca 35-35.5 air mi NW of Crawford and ca 0.5 mi S of Forest Road 931.-103.99066742.952510971128In ephemeral draw and slopes of two buttes with plant diverse areas of moisture ridge "edge" slumps. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2256Grace M. Kostel2004615167U.S.A.NebraskaSiouxOglala National Grassland and Vicinity: ca 20.5-21 air mi NNW of Crawford.-103.62783342.9391158Ridge of sand with plant diverse areas of moisture holding ridge "edge" slumps. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2487Grace M. Kostel2004621173U.S.A.South DakotaPenningtonBuffalo Gap National Grassland and Vicinity: ca 20.5-21 air mi SSW of Wall and 0.5 mi E of Forest Road 7133.-102.29916743.693762792On east and south faces of revegetated and stabilized sand bluffs. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3183Grace M. Kostel200472184U.S.A.South DakotaFall RiverBuffalo Gap National Grassland and Vicinity: ca 12.5-13 air mi WNW of Edgemont immediately E of Wyoming/South Dakota stateline. North of the Cheyenne River.-104.06016743.37911891204In silt and revegetated, stabilized banks of sand north of the river. Area is severely overgrazed. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3460Grace M. Kostel200476188U.S.A.NebraskaDawesOglala National Grassland and Vicinity: ca 6.5-7 mi NNW of Crawford in Sand Creek.-103.44542.7881671097Populous deltoides - Salix plant community with wet, heavy clay soils. Phenology: fruiting.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4556Grace M. Kostel2004814227U.S.A.South DakotaFall RiverBuffalo Gap National Grassland and Vicinity: ca 21 air mi SW of Edgemont.-103.950343.1103975Silver sagebrush plant community in silty soils of ephemeral draws. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun545Grace M. Kostel B. E. Nelson2004524145U.S.A.South DakotaFall RiverBuffalo Gap National Grassland and Vicinity: on County Road 1.5 mi W of Smithwick, 8.5 mi N of Oelrichs.-103.239743.3036945In draw. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun822Grace M. Kostel2004529150U.S.A.NebraskaSiouxOglala National Grassland and Vicinity: ca 36-37 air mi NW of Crawford and 8.5 - 9 mi W of Edgemont Road and 0.5 mi NW of Forest Road 932 on south banks of Indian Creek.-104.045842.9841189In sand on south banks of creek. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4981Grace M. Kostel2005527147U.S.A.South DakotaPenningtonBuffalo Gap National Grassland and Vicinity: ca 19.5-20 air mi SSW of Wall.-102.31548343.71205807823On a mesa top and northeast facing slopes, soils are sand. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2007Amy J. Roderick1997710191U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: North Platte River, N of Bennett Peak, ca 16.8 air mi SE of Saratoga; ca 11 air mi NE of Encampment.-106.595741.26842207Cottonwood and willow lined area adjacent to river. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8927Grace M. Kostel2005720201U.S.A.South DakotaCusterBuffalo Gap National Grassland and Vicinity: ca 19-19.5 air mi E of Fairburn, Battle Creek.-102.81778343.6894800In and along shores of creek, soils are wet clay and clay with gravel sediments. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8996Grace M. Kostel2005721202U.S.A.South DakotaCusterBuffalo Gap National Grassland and Vicinity: ca 10.5 air mi SE of Fairburn.-103.036643.60105839Soils are sand overlain with gravel sediments. Phenology: vegetative only.RMRM946781 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun65629B. E. Nelson2005727208U.S.A.New MexicoTaosCarson National Forest and Vicinity: Sangre de Cristo Range: Rancho del Rio Grande Grant: along Rio Chiquito on Forest Road 437, ca 2.5 air mi SE of Ranchos de Taos.-105.579136.335621952225Roadside and canyon bottom. Phenology: spores.RMRM946780 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun65927B. E. Nelson2005731212U.S.A.New MexicoTaosCarson National Forest and Vicinity: Sangre de Cristo Range: Rancho del Rio Grande Grant: along Rito de la Olla and lower Frijoles Creek, ca 3/4-1 air mi SW of Puertocito, ca 12.5 air mi SE of Ranchos de Taos.-105.411936.27652888Engelmann spruce/corkbark fir forest on northerly-facing slope along the creek. Phenology: spores.RMRM946787 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1352Jill E. Larson2005620171U.S.A.New MexicoTaosCarson National Forest and Vicinity: John Dunn Bridge at Rio Grande, ca 2.5 air mi W of Arroyo Hondo.-105.708736.53521981Canyon bottom/riparian and rocky canyon walls. Phenology: spores.RMRM946786 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2051Jill E. Larson200577188U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: Stewart Meadows on Forest Road 87, ca 18 air mi NW of Tres Piedras.-106.113336.85062515Wetland and old corral. Phenology: spores.RMRM946785 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2250Jill E. Larson2005710191U.S.A.New MexicoTaosCarson National Forest and Vicinity: Forest Road 703, Amole Canyon and old sheep driveway, ca 4 air mi NE of Penasco.-105.604736.190925452865Mixed conifer forest and springs/drainages; old roadbed/sheep driveway. Phenology: spores.RMRM946784 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2674Jill E. Larson2005719200U.S.A.New MexicoTaosCarson National Forest and Vicinity: Sangre de Cristo Range: Valle Vidal Unit: Shuree Ponds and Rock Wall, from Forest Road 1950, ca 11 air mi NE of Red River.-105.194336.776528582949Riparian areas along stream and pond side. Phenology: spores.RMRM946783 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3855Jill E. Larson200588220U.S.A.New MexicoTaosCarson National Forest and Vicinity: Sangre de Cristo Range: Valle de los Romeros W through Policarpio Canyon to Forest Road 76, Forest Trail 13, ca 4 air mi E of Tres Ritos.-105.441236.134526522957Meadow with Iris missouriensis and Veratrum, forest with aspen and spruce. Phenology: spores.RMRM946782 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4131aJill E. Larson2005812224U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: Canjilon Creek and gypsum cliffs, E of Echo Ampitheater recreational site on U.S. Hwy 84, ca 14 air mi NW of Abiquiu.-106.522436.358819962164Along creek riparian area. Phenology: spores.RMRM946789 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun781Jill E. Larson200567158U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: junction of Forest roads 559 and 124 at Canjilon Creek, ca 3 air mi NE of Canjilon.-106.401436.507625002591Slopes with Quercus gambelii and riparian area. Phenology: spores.RMRM946788 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun964Jill E. Larson Robert Peters2005612163U.S.A.New MexicoColfaxCarson National Forest and Vicinity: Sangre de Cristo Range: Valle Vidal Unit: Forest Road 1950, McCrystal Creek Campground, ca 17 air mi NE of Red River.-105.116436.77812454Riparian area and Pinus ponderosa forest. Phenology: spores.RMRM946779 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun80618Ronald L. Hartman Jill E. Larson2005518138U.S.A.New MexicoTaosCarson National Forest and Vicinity: bottom of La Junta Trail to Big Arsenic Trail and back to Little Arsenic Trail to top of rimrock.-105.690636.653420122073Riparian to rocky slopes near river. Phenology: spores.RMRM956252 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4879Jill E. Larson2006518138U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: east rim of Rio Grande from NM Hwy 68 SE toward Canada de Apodaca, ca 0.5 air mi NE of Rinconada.-105.863536.223618441935Area around flowing spring, surrounded by pinyon/juniper woodland. Phenology: spores.RMRM956251 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4916Jill E. Larson2006518138U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: NM Hwy 580 along South Fork Embudo Creek, ca 3 air mi SSE of Dixon.-105.821136.16751966Riparian area along creek with Populus species and Tamarix. Phenology: spores.RMRM956250 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4966Jill E. Larson2006519139U.S.A.New MexicoTaosCarson National Forest and Vicinity: Sangre de Cristo Range: hills E of Rio Grande del Rancho, Forest Trailhead 19 from NM Hwy 518, ca 2 air mi S of Talpa.-105.585536.325121642378Disturbed area near trailhead and roadside. Phenology: spores.RMRM956249 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5253Jill E. Larson2006527147U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: Forest Road 222 in Canada de la Aqua and Red Mesa, ca 0.5 mi N of Las Tablas.-106.024636.56472371Riparian area and old roadbed along stream lined with Berberis fendleri. Phenology: vegetative only.RMRM956248 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5642Jill E. Larson200661152U.S.A.New MexicoTaosCarson National Forest and Vicinity: Picuris Pueblo Indian Reservation: Pu-na Lake at Picuris Pueblo.-105.707936.19932195Area adjacent to lake and stream flowing into the river. Phenology: vegetative only.RMRM956247 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6340Jill E. Larson2006612163U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: El Rito Canyon and Forest Road 559, ca 8 air mi W of Vallecitos and ca 11 air mi NNW of El Rito.-106.271736.48372621Wetland, wet meadow, and creek with extensive beaver activity and Scirpus, Salix species, Poa pratensis, and Taraxacum officinale. Phenology: vegetative only.RMRM956246 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6530Jill E. Larson2006614165U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: Barela Canyon at Barela Spring, Forest Road 167A, ca 8 air mi NW of Tres Piedras, ca 1.5 mi E of Tusas Ridge.-106.082136.73782728Open meadow with Festuca arizonica, Poa pratensis and Chrysothamnus nauseosus; fenced area around spring. Phenology: spores.RMRM956245 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6680Jill E. Larson James Lucero2006615166U.S.A.New MexicoTaosCarson National Forest and Vicinity: Sangre de Cristo Range: Pueblo de Taos Indian Reservation: pasture area W of road to Pueblo, ca 0.5 mi W of Taos Pueblo.-105.554336.43552149Open grassland/wetland with Carex lanuginosa, Equisetum laevigatum, Juncus balticus and groups of Salix and Typha in the moistest areas. Phenology: spores.RMRM956244 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7052Jill E. Larson2006621172U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: Forest Road 94, ca 2 air mi S fo Las Placitas, just S of CCC Spring.-106.164836.29011981Small wetland area with Eleocharis palustris and Potentilla anserina surrounded by pinyon/juniper woodland. Phenology: spores.RMRM956243 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7164Jill E. Larson2006627178U.S.A.New MexicoTaosCarson National Forest and Vicinity: Picuris Pueblo Indian Reservation: E of NM Hwy 76, ca 1 air mi NNE of Chamisal and ca 2 air mi SSW of Picuris Pueblo.-105.721336.181123012335Artificial ponds ringed with Schoenoplectus and Typha; surrounding areas disturbed by creation of ponds. Phenology: spores.RMRM956242 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8406Jill E. Larson2006715196U.S.A.New MexicoColfaxCarson National Forest and Vicinity: Sangre de Cristo Range: Valle Vidal Unit: along Middle Ponil Creek S toward Greenwood Canyon from Forest Road 1910, ca 13 air mi E of Red River and ca 2 mi N of Forest Boundary.-105.181836.72472591Along stream with occasional conifers and Alnus, Populus, and Salix species. Phenology: spores.RMRM956241 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun81907Ronald L. Hartman2006519139U.S.A.New MexicoTaosCarson National Forest and Vicinity: ca 4 mi NE of Pilar.-105.77636.29381846Along side channel of Rio Grande. Phenology: spores.RMRM956240 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun81985Ronald L. Hartman2006522142U.S.A.New MexicoTaosCarson National Forest and Vicinity: ca 1.5 mi SW on NM Hwy 68 from NM Hwy 75, ca 0.5 mi SW along Rio Grande.-105.93836.21141783Roadside to river edge. Phenology: spores.RMRM956239 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun82034Ronald L. Hartman2006522142U.S.A.New MexicoTaosCarson National Forest and Vicinity: NM Hwy 68, 2 mi SW of Embudo, ca 0.2 air mi NE and SW.-105.978536.18331762Roadside to river banks. Phenology: spores.RMRM956238 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun82058Ronald L. Hartman2006522142U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: ca 6 air mi SE of Dixon.-105.83136.17251945Sandy draw and stream bottom. Phenology: spores.RMRM956237 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun83677Ronald L. Hartman2006821233U.S.A.New MexicoTaosCarson National Forest and Vicinity: Sangre de Cristo Range: along Rio Grande del Rancho 2 mi S of Forest Service boundary on NM Hwy 518.-105.581236.3022207Roadside and stream margin. Phenology: vegetative only.RMRM802940 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun52477B. E. Nelson Luanne Lum200169160U.S.A.WyomingParkBighorn Basin: along State Ditch just below Wyo Hwy 120, ca 1 mi E of Big Sand Coulee, ca 5.5 air mi NE of Clark; ca 21 air mi NW of Powell.-109.056844.94991265Ditch bank and adjacent flats. Phenology: spores.RMRM802939 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun52614B. E. Nelson Luanne Lum2001610161U.S.A.WyomingBig HornBighorn Basin: along Lane 42 ca 3 air mi N of Sheep Mountain and ca 0.3 mi S of the Greybull River, ca 4 air mi S of Burlington; ca 19.5 air mi W of Basin.-108.419944.37861341Roadside on wooded clay flats with irrigation ditch. Phenology: spores.RMRM802944 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun347Luanne Lum2001625176U.S.A.WyomingWashakieBighorn Basin: along Wyo Hwy 433, ca 9 air mi NNW of Worland on Bighorn Canal.-107.966144.04331243Sagebrush along canal. Phenology: spores.RMRM802943 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun532Luanne Lum Michelle Wilson200173184U.S.A.WyomingWashakieBighorn Basin: along Nowood River, ca 8 air mi SW of Hyattville.-107.675544.16081270Riparian on sandy soil. Phenology: spores.RMRM802942 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun604Luanne Lum Michelle Wilson200176187U.S.A.WyomingBig HornBighorn Basin: SE of Wardel Reservoir dam, ca 13 air mi WSW of Basin and ca 16 air mi WSW of Greybull.-108.298944.349712921300Freshwater marsh. Phenology: spores.RMRM802941 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun663Luanne Lum200179190U.S.A.WyomingBig HornBighorn Basin: along Beaver Creek or County Road 258, ca 4.2 air mi NW of Shell and ca 13.5 air mi ENE of Greybull.-107.812544.57171295Riparian with Salix on sandy soil. Phenology: spores.RMRM802945 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun68Luanne Lum2001612163U.S.A.WyomingWashakieBig Horn Mountains: along Nowood Road at Nowood River, ca 0.5 air mi NW of Mahogany Butte, ca 27 air mi S of Ten Sleep.-107.400144.08411536Riparian; clayey soil and sandy along bank. Phenology: spores.RMRM937189 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun57482B. E. Nelson2002714195U.S.A.WyomingWashakieBighorn Basin: ridge leading NW off Lightning Ridge on the Nowater Trail or BLM Road 1404, ca 10 air mi SW of Big Trails; ca 36 air mi SE of Worland.-107.460443.664716641676Bottom of small canyon below a spring. Phenology: fruiting.RMRM937188 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun57629B. E. Nelson2002718199U.S.A.WyomingBig HornBighorn Basin: Montgomery Draw Wetland Protection Project ca 1.5 air mi N of Fivemile Creek, ca 7 air mi SW of Manderson; ca 11.5 air mi S of Basin.-108.07744.21941295Dry reservoir area and areas below the dam. Phenology: vegetative only.RMRM937185 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun57915B. E. Nelson2002724205U.S.A.WyomingWashakieBighorn Basin: along Lower and Upper Hanover canals at the end of Lane 7, ca 7.5-8 air mi NNE of Worland.-107.878144.117112311250Ditch banks. Phenology: fruiting.RMRM937200 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2765Luanne Lum2002616167U.S.A.WyomingWashakieBighorn Basin: within Worland ca 0.2 air mi E of Wyoming Street at southern edge of agriculture field on Lower Hanover Canal.-107.938744.0151240Irrigation drainage canal. Phenology: fruiting.RMRM937199 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2789Luanne Lum Al Flinck2002618169U.S.A.WyomingParkBighorn Basin: along Greybull River and Wyo Road 290, ca 4 air mi WSW of Meeteetse.-108.92144.11671820Riparian. Phenology: vegetative only.RMRM937235 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2808Luanne Lum Al Flinck2002618169U.S.A.WyomingParkBighorn Basin: along Greybull River and Wyo Road 290, ca 4 air mi WSW of Meeteetse.-108.92144.11671820Riparian. Phenology: fruiting.RMRM937248 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2919Luanne Lum2002620171U.S.A.WyomingBig Horn[location and coordinates withheld]12501253Irrigation ditch. Phenology: fruiting.RMRM937234 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3086Luanne Lum2002624175U.S.A.WyomingWashakieBighorn Basin: along Wyo Hwy 434 E of Nowood River, ca 9 air mi SSE of Ten Sleep.-107.3843.91131378Agricultural ditch. Phenology: fruiting.RMRM937198 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3239Luanne Lum2002627178U.S.A.WyomingPark[location and coordinates withheld]20002015Spring meadow. Phenology: fruiting.RMRM937197 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3323Luanne Lum2002628179U.S.A.WyomingParkBighorn Basin: along U.S. Hwy 14, 16, and 20, County Road 65Y and North Fork Shoshone River, ca 1 air mi ENE of Wapiti and ca 18.5 air mi WSW of Cody.-109.408444.479916951719Sagebrush and juniper with pine. Phenology: fruiting.RMRM937196 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4129Luanne Lum Michelle Wilson2002714195U.S.A.WyomingBig HornBig Horn Mountains: along Forest Road 408 W of Buckskin Ed Creek, ca 14.5 air mi NNE of Ten Sleep.-107.314344.217225002658Creekside. Phenology: fruiting.RMRM937195 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4460Luanne Lum Michelle Wilson2002717198U.S.A.WyomingParkBighorn Basin: along BLM Road 1314 and Greybull River, ca 14 air mi WSW of Meeteetse.-109.141544.10220062041Riparian. Phenology: vegetative only.RMRM937194 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4525Luanne Lum Michelle Wilson2002720201U.S.A.WyomingParkBighorn Basin: along the Greybull River at Four Bear oil field, ca 18.5 air mi WSW of Meeteetse.-109.241744.116721342195Riparian. Phenology: fruiting.RMRM937193 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4572Luanne Lum Michelle Wilson2002720201U.S.A.WyomingParkBighorn Basin: along Francs Creek, ca 17 air mi WSW of Meeteetse.-109.201644.087221442147Sagebrush. Phenology: vegetative only.RMRM937192 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4643Luanne Lum Michelle Wilson2002720201U.S.A.WyomingHot SpringsBighorn Basin: along County Road 36 and Grass Creek, ca 2.5 air mi W of Grass Creek (Post Office) and ca 32 air mi NW of Thermopolis.-108.700543.954217621780Juniper and sagebrush. Phenology: fruiting.RMRM937191 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4683Luanne Lum Michelle Wilson2002722203U.S.A.WyomingBig HornBighorn Basin: along Shoshone River and Wyo Hwy 37, ca 0.5 air mi ENE of Lovell.-108.460444.86121147Riparian. Phenology: fruiting.RMRM937190 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4748Luanne Lum Michelle Wilson2002722203U.S.A.WyomingBig HornBighorn Basin: along Shoshone River, ca 1.5 air mi E of Byron.-108.480644.80331201Riparian. Phenology: vegetative only.RMRM937210 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4885Luanne Lum Michelle Wilson2002723204U.S.A.WyomingParkBighorn Basin: along Shoshone River W of Willwood Dam and County Road-108.905844.67313441371Riparian. Phenology: fruiting.RMRM937209 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5032Luanne Lum2002729210U.S.A.WyomingParkBighorn Basin: along County Road 6QS at South Fork Shoshone River and Sheep Creek, ca 13.5 air mi SW of Cody.-109.267244.407616701673Riparian. Phenology: fruiting.RMRM937208 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5057Luanne Lum2002730211U.S.A.WyomingParkBighorn Basin: east portion of Ralston Reservoir and Garland Canal, ca 5.5 air mi WSW of Powell and ca 17.5 air mi NE of Cody.-108.865344.73091387Reservoir and canal. Phenology: fruiting.RMRM937207 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5841Luanne Lum2002816228U.S.A.WyomingHot SpringsBighorn Basin: along Grass Creek and Wyo Hwy 171, ca 25 air mi NW of Thermopolis.-108.5243.924615731577Riparian. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun894Margarette J. Lyon1993513133U.S.A.ColoradoMontroseSan Miguel and lower Dolores River Drainages: ca 1.5 air mi SE of Pinon near the San Miguel River.-108.380338.25551829Riparian area with Poa spp. and willow and adjacent sandy flood plain and marshy areas. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4680Margarette J. Lyon1994621172U.S.A.ColoradoSan Miguel[location and coordinates withheld]2682Riparian area with Potentilla and Carex and adjacent uplands with aspen and oak.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6347Margarette J. Lyon1994722203U.S.A.ColoradoSan Miguel[location and coordinates withheld]2256Riparian area with Salix exigua.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6423Margarette J. Lyon1994722203U.S.A.ColoradoSan MiguelSan Miguel and Lower Dolores River Drainages: San Miguel River Drainage: The Nature Conservancy Preserve.-108.694438.34331554Riparian area with Quercus and Rhus, uplands with Artemisia and Atriplex.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6604Margarette J. Lyon Laura Cosse199482214U.S.A.ColoradoMesaSan Miguel and Lower Dolores River Drainages: West Creek on Unaweep Divide.-108.856338.74771768Spring.RMUSFS400916 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun29GJoseph Kramer192481214U.S.A.New MexicoCatronDatil National Forest: Big Springs.-108.8443933.825892134Level muck; wet spots, stream banks and peat bogs. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7354Margarette J. Lyon1994814226U.S.A.UtahGrandSan Miguel and Lower Dolores River Drainages: Dolores River Drainage: Cottonwood Canyon.-109.223438.70381463Dry creek bed with Populus deltoides, Populus angustifolia, and Populus deltoides x angustifolia.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7377Margarette J. Lyon1994815227U.S.A.ColoradoMesaSan Miguel and Lower Dolores River Drainages: Sinbad Valley: along headwaters of Salt Creek.-108.93338.52491829Riparian area with ponderosa pine, oak, and Salix exigua.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7497Margarette J. Lyon1994818230U.S.A.ColoradoMesaSan Miguel and Lower Dolores River Drainages: Unaweep Canyon: north side of West Creek below bridge.-108.893838.77691768Seep on south-facing slope with dense sedges; surrounding riparian area with Populus and Quercus; red, sandy soil.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7668aMargarette J. Lyon1994820232U.S.A.ColoradoMesaSan Miguel and Lower Dolores River Drainages: Unaweep Canyon along West Creek.-108.762738.74772134Riparian area with Acer negundo, Populus, Salix exigua, Eleocharis, and Equisetum.RMUSFS851307 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1608Rob Massatti200573184U.S.A.WyomingFremontEast Slope Wind River Range and Vicinity: ca 2 mi S of Elk Ridge, ca 12 air mi WNW of Dubois.-109.88843.61642518Boggy seep. Phenology: spores.RMUSFS851305 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun175Rob Massatti2005610161U.S.A.WyomingFremontEast Slope Wind River Range and Vicinity: Red Canyon ca 1 mi W of Weiser Knoll, ca 14 air mi SE of Lander.-108.641942.652817891899Juniper/sagebrush draws and slopes. Phenology: spores.RMUSFS851306 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3070Rob Massatti2005725206U.S.A.WyomingFremontEast Slope Wind River Range and Vicinity: Weed Draw to Canyon Creek, ca 12 air mi S of Lander.-108.790442.660623352667River banks and gravel beds in river. Phenology: spores.RMUSFS851304 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4374Rob Massatti200593246U.S.A.WyomingFremontEast Slope Wind River Range and Vicinity: Middle Fork Popo Agie at forest boundry, ca 6 air mi SW of Lander.-108.833242.736819601978River banks, mixed coniferous/aspen cover. Phenology: spores.RMUSFS851302 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4639Rob Massatti2006525145U.S.A.WyomingFremontEast Slope Wind River Range and Vicinity: ca 3 mi SW of Weiser Knoll; ca 15 air mi SSE of Lander.-108.625942.601520672173Rocky meadow on limestone. Phenology: spores.RMUSFS851301 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5301Rob Massatti200668159U.S.A.WyomingFremontEast Slope Wind River Range and Vicinity: ca 1 mi SE of Wolf Point; ca 13 air mi S of Lander.-108.724742.641522622368Seep within an aspen stand. Phenology: spores.RMUSFS851300 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5515Rob Massatti200668159U.S.A.WyomingFremontEast Slope Wind River Range and Vicinity: 1 mi W of Ed Young Mountain; ca 14 air mi S of Lander.-108.768842.631222102446Riparian margins of river. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1030Melanie Arnett1998627178U.S.A.ColoradoSaguacheSouthern Gunnison Basin: Sawatch Range: along Indian Creek off of Forest Road 777, ca 4 air mi WSW of Sargents.-106.352338.375127312829Riparian. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1280Melanie Arnett199876187U.S.A.ColoradoGunnisonSouthern Gunnison Basin: ca 3.3 air mi E of Blaine Rock, ca 8.5 air mi SW of Gunnison on northerly adjacent ravines of Big Mesa.-107.023238.442724932652Disturbed watering hole. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2735Melanie Arnett199887219U.S.A.ColoradoGunnisonSouthern Gunnison Basin: ca 1.5 air mi N of Maple Leaf Mine; ca 5 road mi S of U.S. Hwy 50; ca 10 air mi SE of Gunnison along Colo Hwy 114.-106.756938.46312378Roadside. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun591Melanie Arnett1998618169U.S.A.ColoradoSaguacheSouthern Gunnison Basin: ca 17.5 air mi SE of Gunnison along Razor Creek; ca 1/4 road mi N of intersection with County Road WW-13 on County Road 14-PP.-106.681838.37552548Disturbed riparian. Phenology: vegetative only.RMRM750883 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4195Melanie Arnett1999614165U.S.A.ColoradoGunnisonSouthern Gunnison Basin: along Colo Hwy 114 at its intersection with U.S. Hwy 50, ca 8 air mi ESE of Gunnison.-106.77538.5222384Roadside drainage. Phenology: spores.RMRM750882 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5230Melanie Arnett1999715196U.S.A.ColoradoSaguacheSouthern Gunnison Basin: Cochetopa Hills: Gunnison National Forest: Indian Creek, ca 2 air mi WSW of Pinnacle Mine; ca 4.5 air mi ESE of Sargents; ca 7 air mi S of Monarch Pass.-106.333838.389828173006Riparian. Phenology: spores.RMRM384825 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4153June Haines1985613164U.S.A.WyomingFremontHaines' Farm, ca 9 mi W of Riverton on U.S. Hwy 26.-108.527743.09161639Canal bank at edge of water. Phenology: spores.RMRM384826 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4690aJune Haines Georgia Haines and Nora Little198574185U.S.A.WyomingFremontBig Camp Creek Area, ca 6 air mi WSW of Muddy Gap Junction (Three Forks).-107.552242.339720732134Moist stream banks. Phenology: spores.RMRM384827 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5090June Haines Georgia Haines1985727208U.S.A.WyomingFremontSoutheast edge of Trail Lake at inlet of Torrey Creek, ca 8.2 air mi SSE of Dubois; ca 6.9 mi S on Trail Lake Road.-109.545843.43452256Wet creek banks. Phenology: vegetative only.RMRM384829 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5385June Haines198587219U.S.A.WyomingFremontSweetwter River, ca 3 air mi NE of Jeffrey City.-107.789442.525818991932Meadow north of river. Phenology: vegetative only.RMRM384830 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6715June Haines Georgia Haines1986621172U.S.A.WyomingNatronaSweetwater Rocks: Savage Pocket, ca 13 air mi NE of Muddy Gap Junction.-107.258542.48218652073Wet rush-sedge meadow adjacent to creek. Phenology: spores.RMRM338009 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.Max H. Schroeder Gary L. Ranck1976810223U.S.A.WyomingCarbonStratton Hydrology Study Area: Sane Creek Bottom.-107.137641.417921342439Sagebrush rangeland. Phenology: spores.RMRM288707 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1273Robert D. Dorn1971621172U.S.A.WyomingLincolnSnake River Canyon.-110.904543.19671768River bank associated with Equisetum hyemale; common. Phenology: spores.RMRM288717 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1460Robert D. Dorn197194247U.S.A.WyomingCarbon10 mi ESE of Encampment.-106.614841.16792256Moist bank associated with Cirsium, Prunus, and Rosa; moderately abundant. Phenology: spores.RMRM658986 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun53239Ronald L. Hartman1995812224U.S.A.WyomingTetonMount Leidy Highland Area: Gunsight Pass, NW 0.5 air mi on flank of plateau.-110.306943.822427432804Rocky slopes with scattered clumps of conifers. *Database corrected, label habitat, elv and S wrong. Phenology: spores.RMRM525589 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5329M. A. (Ben) Franklin198796249U.S.A.ArizonaSanta CruzWest slope of Atacosa Mountains: Sycamore Canyon.-111.1954831.4187611401207Canyon bottom; riparian; sycamore-velvet ash-willow community. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5933Lynn Marie Moore1995622173U.S.A.ColoradoDoloresUpper Dolores River Drainage and Adjacent Areas: ca 4 air mi NE of Dove Creek near Dove Creek Pump Station along the Dolores River, County Road 10.00.-108.800937.828418291859Riparian area and canyon slopes with Rhus, Quercus, ponderosa, pinyon-juniper, Apocynum, poison ivy, and boxelder; east facing slope. Phenology: fruiting.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6007Lynn Marie Moore1995622173U.S.A.ColoradoSan MiguelUpper Dolores River Drainage and Adjacent Areas: ca 11 air mi N of Dove Creek in Dolores River Canyon, County Road 10.00.-108.819237.90091829Pinyon-juniper, ponderosa, Rhus, poison ivy, Salix, and boxelder on east facing canyon slopes. Phenology: fruiting.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2544Amy J. Roderick1997720201U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: First Sand Creek and ridge to west, ca 7.2 air mi N of Elk Mountain townsite; ca 15.2 air mi SE of Hanna.-106.410941.79122164Dry to muddy creek bed and embankments. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6383Lynn Marie Moore199575186U.S.A.ColoradoMontroseUpper Dolores River Drainage and Adjacent Areas: Slick Rock Canyon, ca 19 air mi W of Naturita, at mouth of Spring Canyon and surrounding areas northside of Dolores River.-108.897638.226315541585Salix, Fraxinus, Tamarisk, and pinyon-juniper on a west facing side canyon. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun64821B. E. Nelson Rob Massatti and Rachel Newton200568159U.S.A.WyomingFremontWetlands and Adjacent Areas: northwest corner of Ocean Lake, ca 4.5 air mi SE of Pavillion off Wyo Hwy 134; ca 17.5 air mi NW of Riverton.-108.620243.210915941609Flats adjacent to the lake with willow thickets and open areas. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1047Rachel Newton2005626177U.S.A.WyomingCarbonWetlands and Adjacent Areas: confluence of North Platte River and Corral Creek, ca 12 air mi NE of Encampment.-106.574741.262175Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1122Rachel Newton2005626177U.S.A.WyomingCarbonWetlands and Adjacent Areas: Treasure Island and along North Platte River, ca 9 air mi SE of Saratoga.-106.727541.33152110Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1155Rachel Newton2005626177U.S.A.WyomingAlbanyWetlands and Adjacent Areas: Little Laramie River, ca 5 air mi SE of Centennial.-106.083541.25332335Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1228Rachel Newton2005628179U.S.A.WyomingLaramieWetlands and Adjacent Areas: Bear Creek, ca 9 air mi SSE of Chugwater.-104.760841.63591694Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1266Rachel Newton2005628179U.S.A.WyomingPlatteWetlands and Adjacent Areas: Chugwater Creek, ca 1.5 air mi NE of Chugwater.-104.799641.7681657Very moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1450Rachel Newton200575186U.S.A.WyomingLincolnWetlands and Adjacent Areas: Hams Fork, ca 4 air mi SE of Kemmerer.-110.484341.7512017Moist banks and flood plain. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1463Rachel Newton200576187U.S.A.WyomingSweetwaterWetlands and Adjacent Areas: Horseshoe Bend, Green River, ca 42 air mi NW of Rock Springs.-109.920941.92341894Moist flood plain. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1525Rachel Newton200576187U.S.A.WyomingUintaWetlands and Adjacent Areas: Bear River, ca 1.5 air mi SE of Evanston.-110.930441.25682089Flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun154Rachel Newton2005613164U.S.A.WyomingFremontWetlands and Adjacent Areas: Sweetwater River Canyon, ca 34 air mi SE of Lander.-108.44542.43292106Along river banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1549Rachel Newton200576187U.S.A.WyomingUintaWetlands and Adjacent Areas: Henrys Fork, ca 21 air mi SE of Mountain View.-110.078641.04442209Moist sandy flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1686Rachel Newton2005710191U.S.A.WyomingCarbonWetlands and Adjacent Areas: Rock Creek, ca 18 air mi S of Medicine Bow.-106.166341.62582205Moist woody flood plains and banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1704Rachel Newton2005710191U.S.A.WyomingAlbanyWetlands and Adjacent Areas: Threemile Creek, ca 16 air mi SE of Medicine Bow.-106.038541.70842095Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1754Rachel Newton2005710191U.S.A.WyomingCarbonWetlands and Adjacent Areas: Pass Creek, ca 33 air mi WSW of Medicine Bow.-106.038541.70912000Dry creek banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1821Rachel Newton2005711192U.S.A.WyomingNatronaWetlands and Adjacent Areas: Pathfinder Reservoir, ca 41 air mi SE of Casper.-107.0642.50811735Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1858Rachel Newton2005711192U.S.A.WyomingFremontWetlands and Adjacent Areas: Sweetwater River, ca 10 air mi NW of Muddy Gap Junction.-107.594942.46771857Moist banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2025Rachel Newton2005715196U.S.A.WyomingNiobraraWetlands and Adjacent Areas: Old Woman Creek, ca 18 air mi N of Lusk.-104.382343.04441269Moist creek bed and banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun204Rachel Newton2005615166U.S.A.WyomingSubletteWetlands and Adjacent Areas: Big Sandy River, ca 18 air mi NNW of Farson.-109.517342.35212063Sandy river banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2069Rachel Newton2005715196U.S.A.WyomingPlatteWetlands and Adjacent Areas: wetlands below Glendo Dam, North Platte River, ca 17 air mi NE of Guernsey.-104.944642.46651376Marshy banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2193Rachel Newton2005720201U.S.A.WyomingLincolnWetlands and Adjacent Areas: Smiths Fork, ca 18 air mi NNE of Cokeville.-110.874142.34532094Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2277Rachel Newton2005720201U.S.A.WyomingLincolnWetlands and Adjacent Areas: Fontenelle Creek, ca 14 air mi SSW of La Barge.-110.253342.08312032Dry rocky uplands. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2394Rachel Newton2005721202U.S.A.WyomingSubletteWetlands and Adjacent Areas: confluence of Pine Creek and Fremont Lake, ca 3 air mi N of Pinedale.-109.837842.89672171Tree-covered, submerged hummocks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2543Rachel Newton2005727208U.S.A.WyomingAlbanyWetlands and Adjacent Areas: Laramie River, ca 26 air mi SW of Laramie.-106.016641.09962243Moist river banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2837Rachel Newton2005731212U.S.A.WyomingAlbanyWetlands and Adjacent Areas: Sybille Creek, ca 29 air mi N of Laramie.-105.405441.74711840Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2887Rachel Newton2005731212U.S.A.WyomingPlatteWetlands and Adjacent Areas: Antelope Creek and pond formed by damming, ca 14 air mi NNW of Chugwater.-104.898241.94061470Submerged in standing water. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun29Rachel Newton2005610161U.S.A.WyomingFremontWetlands and Adjacent Areas: along the Sweetwater River, ca 5 air mi NE of Sweetwater Station; ca 38 air mi SE of Lander.-108.076542.58011992Along river banks, flood plains and ditches. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2963Rachel Newton200583215U.S.A.WyomingAlbanyWetlands and Adjacent Areas: Rock Creek, 16 air mi SE of Medicine Bow.-106.004741.72282059Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3606Rachel Newton2005825237U.S.A.WyomingSubletteWetlands and Adjacent Areas: East Fork River, ca 15 air mi SE of Pinedale.-109.682342.71482086Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun456Rachel Newton2005617168U.S.A.WyomingFremontWetlands and Adjacent Areas: Sweetwater River, ca 32 air mi SW of Lander.-108.810242.37132252Moist river banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun58Rachel Newton2005610161U.S.A.WyomingFremontWetlands and Adjacent Areas: Beaver Creek, ca 24 air mi SE of Lander.-108.334842.71981694Streamside, flood plains up to ridgetop. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun604Rachel Newton2005618169U.S.A.WyomingFremontWetlands and Adjacent Areas: Sweetwater River, ca 31 air mi SE of Lander.-108.537742.45832267River banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun700Rachel Newton2005622173U.S.A.WyomingAlbanyWetlands and Adjacent Areas: Laramie River, ca 4 air mi SW of Laramie.-105.667641.25522065Flooded river banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun727Rachel Newton2005622173U.S.A.WyomingAlbanyWetlands and Adjacent Areas: Meeboer Lake, ca 15 air mi SW of Laramie.-105.825641.21742094Marshy banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun966Rachel Newton2005624175U.S.A.WyomingAlbanyWetlands and Adjacent Areas: Laramie River, ca 28 air mi SW of Laramie.-106.037441.03082344Moist banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3933Rachel Newton200661152U.S.A.WyomingJohnsonWetlands and Adjacent Areas: North Fork Crazy Woman Creek, ca 14 mi S of Buffalo.-106.6666944.083341382Moist sandy banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4166Rachel Newton200665156U.S.A.WyomingJohnsonWetlands and Adjacent Areas: Red Fork Powder River, ca 9 air mi W of Kaycee.-106.8153843.695591500Dry flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4217Rachel Newton200665156U.S.A.WyomingJohnsonWetlands and Adjacent Areas: Middle Fork Powder River, ca 6 air mi SW of Kaycee.-106.7577443.661541481Along moist ditch banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4397Rachel Newton200667158U.S.A.WyomingWestonWetlands and Adjacent Areas: Little Thunder Creek, ca 32 air mi E of Wright.-104.9179343.652611310Along moist creek banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4511Rachel Newton200667158U.S.A.WyomingWeston[location and coordinates withheld]1401Along moist stream banks and mossy hummocks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4545Rachel Newton200668159U.S.A.WyomingWeston[location and coordinates withheld]1400Along moist creek banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4556Rachel Newton200668159U.S.A.WyomingWeston[location and coordinates withheld]1418Moist wooded banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4585Rachel Newton2006611162U.S.A.WyomingJohnsonWetlands and Adjacent Areas: Powder River, ca 29 air mi E of Buffalo.-106.1575844.300851180Moist weed-infested floodplain. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4721Rachel Newton2006611162U.S.A.WyomingCrookWetlands and Adjacent Areas: Inyan Kara Creek, ca 17 air mi NE of Moorcroft.-104.7285844.448611219Along moist shaded flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5063Rachel Newton2006617168U.S.A.WyomingJohnson[location and coordinates withheld]1396Moist river banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2637Amy J. Roderick1997722203U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Seminoe Mountains: Cottonwood Creek, ca 2 air mi W of Seminoe Dam; ca 27 air mi NE of Sinclair.-107.04642.15182042Aspen and cottonwood lined creek in mountain meadow. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5236Rachel Newton2006622173U.S.A.WyomingHot SpringsWetlands and Adjacent Areas: Big Horn River, ca 4 air mi NE of Thermopolis.-108.1635143.691911325Dry wooded uplands. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5304aRachel Newton2006623174U.S.A.WyomingWashakieWetlands and Adjacent Areas: Tensleep Creek, ca 5 air mi NE of Ten Sleep.-107.3773144.065321446Along moist, shaded creek banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5672Rachel Newton2006630181U.S.A.WyomingParkWetlands and Adjacent Areas: Shoshone River, ca 16 air mi SW of Powell; ca 8 air mi NE of Cody.-108.9477444.590481424Moist, rocky river banks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5717Rachel Newton2006630181U.S.A.WyomingParkWetlands and Adjacent Areas: South Fork Shoshone River, ca 12 air mi SW of Cody.-109.2682444.408421674Rocky banks and uplands. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6069Rachel Newton200676187U.S.A.WyomingTetonWetlands and Adjacent Areas: Horsetail Creek, ca 7 air mi E of Kelly; ca 14 air mi NE of Jackson.-110.4960743.637212127Moist banks and hummocks. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6173Rachel Newton2006720201U.S.A.WyomingJohnsonWetlands and Adjacent Areas: North Fork Powder River, ca 4 air mi NW of Kaycee.-106.7025643.775741497Along moist river banks and flood plains. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun267Amy J. Roderick199761152U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: Granite Mountains: Martins Cove, N of Wyo Hwy 220, ca 13 air mi NE of Muddy Gap Junction.-107.238942.45291884East facing slope of sand dune with patches of yucca, rabbitbrush, and sagebrush. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1128Sarah Nunn2001611162U.S.A.ColoradoLarimerRoosevelt National Forest: Front Range: Dadd Gulch Trail off Colo Hwy 14, ca 23 air mi W of Fort Collins.-105.554240.681824692560A wet/damp gulch with a heavy canopied forest of Pinus ponderosa, Populus tremuloides, and Alnus. Phenology: vegetative only.RMRM771872 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1380Sarah Nunn2001613164U.S.A.ColoradoLarimerRoosevelt National Forest: Front Range: at Sand Creek Pass 1/2 mi E of County Road 80C, just N of Jimmy Creek Spring, ca 41 air mi NW of Fort Collins.-105.828940.89392743Wet marshy meadow and pond edges of Salix, Iris, and Populus tremuloides. Phenology: spores.RMRM771875 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun272Sarah Nunn Ronald L. Hartman2001526146U.S.A.ColoradoLarimerRoosevelt National Forest: Front Range: by Sevenmile Creek at the junction of County Road 69 and Forest Road 225, N of Rustic, ca 26 air mi W of Fort Collins.-105.600440.719622862560Granite hillside with some quartz, south and east facing slopes with occasional ponderosa pine, Rocky Mountain juniper, Ribes, and Purshia, scrubby and dry; creek at bottom of hillside. Phenology: spores.RMRM771874 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun538Sarah Nunn2001530150U.S.A.ColoradoLarimerRoosevelt National Forest: Front Range: at Kelly Flats Campground on Colo Hwy 14. ca 19 air mi W of Fort Collins.-105.48940.6772195River edge habitat with damp dark soil and Acer, Betula, and Rubus. Phenology: spores.RMRM283260 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10453C. L. Porter Marjorie W. Porter1967711192U.S.A.WyomingSublette1 mi N of Daniel.-110.071842.87722134Wet meadows and streambanks of bottomland. Common. Phenology: spores.RMRM217867 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5346C. L. Porter1950620171U.S.A.WyomingCrookSand Creek Canyon near Beulah.-104.097844.51381067Stream bank. Phenology: spores.RMUSFS400709 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun152Paul H. Roberts Murrel W. Talbot191588220U.S.A.New MexicoCatronDatil National Forest: Jewett Ranger Station.-108.6317933.97522225Edge of ponderosa pine; wet meadows along creeks; frequent. Phenology: spores.RMRM229644 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5981C. L. Porter B. F. Miller1952630182U.S.A.WyomingPlatteNear McKinley between Wheatland and Glendo.-105.080942.59551463Roadside ditches. Phenology: spores.RMRM249337 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6933C. L. Porter195667159U.S.A.WyomingCrookSand Creek Canyon near Beulah.-104.09844.51391067Stream bank, dry soil. Phenology: spores.RMRM260214 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7845C. L. Porter Marjorie W. Porter1959623174U.S.A.WyomingCrookDevils Tower National Monument.-104.719844.59051219Bottom land, sandy soil. Phenology: spores.RMRM264710 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8662C. L. Porter Marjorie W. Porter1961622173U.S.A.WyomingLaramieAlong U.S. Hwy 87, 20-30 mi N of Cheyenne.-104.906641.46121829Bottom land along creek. Phenology: spores.RMRM264709 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8764C. L. Porter Marjorie W. Porter1961718199U.S.A.WyomingNiobrara2 mi W of Van Tassel, on the Niobrara River.-104.121742.67261371Stream bank, with sedges. Phenology: spores.RMRM816995 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1267Brian Reif2002625176U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Jemez Mountains: Salitral Creek and spring, 4.5 air mi WNW of Coyote, where Forest Road 148 crosses creek. Collection within 1/4 mi up and down creek and at nearby spring.-106.6820536.1872172152Riparian and sandy banks. Significant salt deposits. Phenology: spores.RMRM816994 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1541Brian Reif200272183U.S.A.New MexicoSandovalSanta Fe National Forest and Vicinity: Jemez Mountains: East Fork Jemez River at Las Conchas Trail 137 off NM Hwy 4, S of Valles Caldera National Preserve. NW on Trail 137 along river for 1.5 mi.-106.53283335.81578325482564Riparian and wet meadow of canyon bottom. Phenology: spores.RMRM816993 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2323Brian Reif2002714195U.S.A.New MexicoSandovalSanta Fe National Forest and Vicinity: Jemez Mountains: NM Hwy 126 in Telephone Canyon, 12.5 air mi ESE of Cuba. SW for 0.6 air mi on NM Hwy 126 to seep, NE 1.3 air mi to Moon Spring and returning to NM Hwy 126 via Forest Road 117.-106.75401735.948524782621Riparian of canyon bottom at constriction/tapering of meadow and drop in elevation. Phenology: spores.RMRM816992 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2605Brian Reif2002718199U.S.A.New MexicoRio ArribaSanta Fe National Forest and vicinity: Jemez Mountains: Arroyo de los Frijoles, 2.5 air mi W of Abiquiu. From corral at start of Barranca Trail 111 3.4 air mi S to Frijoles Spring.-106.36116736.1997518332134Riparian with cottonwoods through canyon of soft sedimentary rock in pinyon/juniper woodland. Phenology: spores.RMRM817000 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun288Brian Reif200267158U.S.A.New MexicoSandovalSanta Fe National Forest and Vicinity: Jemez Mountains: NM Hwy 4 at Soda Dam, 1.7 air mi N of Jemez Springs; S 0.5 mi to bridge.-106.6867535.79228319261932Riparian of river. Phenology: spores.RMRM816999 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun304Brian Reif200267158U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Jemez Mountains: Forest Road 27 at headwaters of Polvadera Creek, 7.5 air mi SW of Abiquiu, along creek for 1.1 mi.-106.4222536.1529521462323Riparian. Phenology: spores.RMRM816998 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun344Brian Reif200269160U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Jemez Mountains: Forest Road 316 at spring, 2.4 air mi S of NM Hwy 96/Forest Road 316 junction, S on Coyote Creek for ca 0.4 mi.-106.61743336.13158321402175Riparian through pinyon/juniper woodland with ponderosa pine/Douglas fir. Phenology: spores.RMRM816997 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun414Brian Reif200269160U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Jemez Mountains: Forest Road 103 at Rio Puerco Recreation Site, 7.8 air mi SW of Coyote, 0.3 mi E down Rio Puerco from parking lot.-106.72436.09951724632487Riparian. Phenology: spores.RMRM816996 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun654Brian Reif2002614165U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Jemez Mountains: Ojitos Canyon-Chama River Canyon Wilderness Area, 9 air mi NNW of Coyote, N 2.5 mi into Ojito Canyon on Trail 298 from junction with Forest Road 468 to beginning of trail's ascent.-106.67196736.29878320792481Canyon bottom of Gambels oak and riparian. Phenology: spores.RMRM816983 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun74430Ronald L. Hartman Brian Reif and Brian Jacobs2002524144U.S.A.New MexicoLos AlamosSanta Fe National Forest and Vicinity: Jemez Mountains: White Rock Canyon, Red Dot Trail to Pajarito Springs, the Rio Grande and down stream ca 1 mi; 2 - 2.5 air mi S of White Rock.-106.20346735.809916461768Rocky slopes along trail, stream, wet areas. Phenology: spores.RMRM816982 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun74598aRonald L. Hartman Brian Reif and Jim Fowler2002527147U.S.A.New MexicoSandovalSanta Fe National Forest and Vicinity: Jemez Mountains: Canyon de San Diego, Lower Jemez Campground, south to ca 2 air mi along Jemez River.-106.7245535.71233317511798Riparian with cottonwood, willow, and roadsides. Phenology: spores.RMRM816981 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun75236Ronald L. Hartman2002623174U.S.A.New MexicoSandovalSanta Fe National Forest and Vicinity: Jemez Mountains: 8 air mi SW of La Cueva; Forest Road 376, 2 air mi N of Porter.-106.78098335.844252283Stream and adjacent meadow. Phenology: vegetative only.RMRM816980 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun75314Ronald L. Hartman2002625176U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Jemez Mountains: 3-4 air mi NW of Llaves at junction of Forest Road 312 and Forest Road 313.-106.91056736.410452196Ponderosa pine forest and riparian. Phenology: spores.RMRM816979 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun75328Ronald L. Hartman2002625176U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Jemez Mountains: Wolf Draw, ca 9 air mi NW of Llaves on Forest Road 312.-106.934736.4613332287Roadside and ponderosa pine forest. Phenology: spores.RMRM816978 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun76143Ronald L. Hartman2002721202U.S.A.New MexicoSandovalSanta Fe National Forest and Vicinity: Jemez Mountains: NM Hwy 126, 1.2 road mi from Forest Road 20, Telephone Canyon.-106.74166735.95524392469Grassy valley. Phenology: vegetative only.RMRM816991 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4827Brian Reif200362153U.S.A.New MexicoSan MiguelSanta Fe National Forest and Vicinity: Sangre de Cristo Mountains: on NM Hwy 3 along Pecos River W of Villanueva State Park, 10 air mi SSE of I-25/NM Hwy 3 junction.-105.371435.27241768Roadside corridor with pinyon/juniper woodland on sedimentary slope to north; irrigation ditch and riparian of cottonwood, Russian olive to south. Phenology: spores.RMRM816990 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5200Brian Reif2003612163U.S.A.New MexicoSanta FeSanta Fe National Forest and Vicinity: Sangre de Cristo Mountains: Tesuque Creek on Winsor Trail 254, 3 air mi SE of Tesuque; SW on trail 0.5 air mi.-105.88835.74522312246Riparian with mature ponderosa pine, horsetail, cottonwood, alder, and willow; sandy wash. Phenology: spores.RMRM816989 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5577Brian Reif2003619170U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Jemez Mountains: Forest Road 77 S to Canada Spring in Canada Schmidt, 2 air mi ESE of Capulin Peak. N36.240 W106.728 SW 0.8 air mi to N36.231 W106.738 on ridge.-106.72836.2425972719Shallow grassy drainage parallel to road in mixed conifer forest; mostly ponderosa pine low on slopes, mature aspen in bottom. Phenology: spores.RMRM816988 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5917Brian Reif2003623174U.S.A.New MexicoSanta FeSanta Fe National Forest and Vicinity: Sangre de Cristo Mountains: County Road 503 N into La Caja Canyon on Debris Basin Trail and along Rio Medio to southern end of Santa Cruz Reservoir, 1 air mi W of Cundiyo.-105.91335.9691993Along the river through tight canyon with granite cliffs with cottonwood and coyote willow in bottom. Phenology: spores.RMRM816987 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5963Brian Reif2003624175U.S.A.New MexicoRio ArribaSanta Fe National Forest and Vicinity: Sangre de Cristo Mountains: Arroyo de los Encinos, 3.5 air mi ENE of Chimayo; from small springs and mature cottonwoods at base of sedimentary formation/cliffs to S 0.3 air mi in dry wash.-105.92336.0319812018Desert shrubland with spring above and narrow, excised dry wash through soft sediment below. Phenology: spores.RMRM816986 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7505Brian Reif2003728209U.S.A.New MexicoSanta FeSanta Fe National Forest and Vicinity: Sangre de Cristo Mountains: Rio en Medio Trail 163, 4.5 air mi NE of Tesuque. N35.818 W105.871 at Trail 179 junction W 0.8 air mi on trail to N35.820 W105.885.-105.87135.81822562365Trailside in canyon bottom with riparian, spruce/fir, and some pockets of open meadow; canyon slopes of ponderosa pine. Phenology: spores.RMRM816985 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8771Brian Reif2003818230U.S.A.New MexicoSan MiguelSanta Fe National Forest and Vicinity: Sangre de Cristo Mountains: Forest Road 60 along Sapello River, 2 air mi SW of Rociada; N35.8129 W105.4480 at corral NW 0.3 air mi to Surprise Valley Ranch at N35.8168 W105.4518.-105.451835.81682439Roadside in canyon bottom and south-facing slope of mixed conifers/mature aspen; mostly ponderosa pine in exposed areas. Phenology: spores.RMRM816984 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9252Brian Reif2003829241U.S.A.New MexicoMora[location and coordinates withheld]2347Roadside in meadow bottom including lower, south-facing slope of Gambels oak/ pinyon pine, and riparian at creek crossing; ponderosa pine forest. Phenology: spores.RMRM804662 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun62028B. E. Nelson2004720202U.S.A.New MexicoSandovalSanta Fe National Forest and Vicinity: Sierra Nacimiento: Joaquin Canyon on the north side of Mesa Venado, ca 3/4 air mi W of Rio Guadalupe, ca 6.5 air mi W of Jemez Springs; ca 19.5 air mi SSE of Cuba.-106.804635.77892164Along stream and meadows in old beaver pond. Phenology: spores.RMRM804673 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun78919Ronald L. Hartman200468160U.S.A.New MexicoLos Alamos[location and coordinates withheld]16761707Banks and lower margin along river. Phenology: flowering.RMRM146890 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1044Aven Nelson Ruth Nelson193468159U.S.A.WyomingTetonJackson Hole: Jenny Lake.-110.715243.7492073On gravelly bottomlands. Phenology: spores.RMRM52394 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1355Aven Nelson1895628179U.S.A.WyomingAlbanyPole Creek.-105.182341.26842286Phenology: vegetative only.RMRM52390 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1640Aven Nelson189588220U.S.A.WyomingAlbanyLaramie Peak.-105.489142.255423172408Phenology: spores.RMRM5633 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1640Aven Nelson189588220U.S.A.WyomingAlbanyLaramie Peak.-105.489142.255423172408Phenology: spores.RMRM8699 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2514Aven Nelson1896725207U.S.A.WyomingJohnsonBuffalo.-106.712544.35091416Phenology: spores.RMRM3854 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun275Aven Nelson1894619170U.S.A.WyomingAlbanyFisher Ranch.-105.624341.41372164Phenology: spores.RMRM3715 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun604Aven Nelson1894723204U.S.A.WyomingConverseC Y Ranch, Big Muddy.-106.076942.84381539Phenology: spores.RMRM3716 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun604Aven Nelson1894723204U.S.A.WyomingConverseC Y Ranch, Big Muddy.-106.076942.84381539Phenology: spores.RMRM20084 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6435Aven Nelson Elias Nelson1899813225U.S.A.WyomingTetonYellowstone National Park: Snake River.-110.645344.15572103On dry slopes and banks. Phenology: spores.RMRM310480 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7628Aven Nelson1900716197U.S.A.WyomingAlbanyDunn's Ranch.In sandy meadow. Phenology: spores.RMRM310423 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7693Aven Nelson1900726207U.S.A.WyomingAlbanyCentennial, North Fork.-106.118241.29712439An almost clean patch of it on the open bottom. Phenology: spores.RMRM79616 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9414Aven Nelson1910626177U.S.A.WyomingFremontBirdseye Canyon.-108.084143.407415851737Sandy meadows. Phenology: spores.RMRM1179 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.B. C. Buffum18917182U.S.A.WyomingFish Hatchery.Phenology: spores.RMRM301935 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun488Barry Hammel1977626177U.S.A.WyomingAlbanyWest slope Jelm Mountain, near Burnstad cabin.-106.003641.08172317Common in moist ground and on slopes along small creek in aspen grove. Phenology: spores.RMRM204591 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun85Charles L. Turner1946514134U.S.A.WyomingConverse5 mi SW of Glenrock.-105.939242.81471493Moist loamy soil on irrigated meadow. Phenology: vegetative only.RMRM345555 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10Charles R. Clarke198165156U.S.A.WyomingTetonSnake River Valley; ca 5.5 air mi S of Jackson, ca 5.5 air mi NNW of Hoback Junction near Flat Creek.-110.766643.39941829Flat exposure. Phenology: spores.RMRM532812 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1Cheryl Tollefsen198767158U.S.A.WyomingTetonReststop between Coulter Bay and Jackson Hole Lodge.-110.58543.90972103Phenology: spores.RMRM397796 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.D. Long J. Von Loh19836152U.S.A.WyomingLaramieF. E. Warren Air Force Base: along Crow Creek near picnic area.-104.877541.15311859Aquatic. Phenology: spores.RMRM397797 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.D. Long J. Von Loh19836152U.S.A.WyomingLaramieF. E. Warren Air Force Base: along Crow Creek near picnic area.-104.877541.15311859Aquatic, along creek. Phenology: spores.RMRM398729 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun119Dan Lewis1981722203U.S.A.WyomingConverseLaPrele Creek at Ayers Natural Bridge, ca 12 air mi WSW of Douglas.-105.607142.72971524Common on streambank. Phenology: spores.RMRM104424 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun190Edward D. Pearson D. Pearson1924822235U.S.A.WyomingParkShoshone National Forest: Crandall Creek; Olsons Ranch.-109.65844.84812134Willow swamp. Phenology: vegetative only.RMRM104527 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun241Edward D. Pearson1925623174U.S.A.WyomingParkClark, Pearsons Ranch.1219Rocky soil near river. Phenology: spores.RMUSFS400917 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun139William A. Dayton193064155U.S.A.New MexicoBernalilloNear Albuquerque.-106.6521935.084614931798Seep. Phenology: spores.RMRM577386 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun16493Erwin F. Evert198966157U.S.A.WyomingParkNorth Fork Shoshone River Drainage: Absaroka Mountains: along west side of Elk Fork Creek, ca 1.5 mi S of U.S. Hwy 14, 16, and 20.-109.62444.46181859Exposed gravel bars with some Salix lasiandra, Populus balsamifera, and Juniperus scopulorum. Phenology: spores.RMRM577798 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun16937Erwin F. Evert1989620171U.S.A.WyomingParkNorth Fork Shoshone River Drainage: Absaroka Mountains: along the east side of the North Fork Shoshone River, ca 2-2.5 mi N of U.S. Hwy 14, 16, and 20.-109.98244.5442134Open, recently burned, formerly mixed coniferous forest of lodgepole pine, Engelmann spruce and subalpine fir. Phenology: spores.RMRM341325 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2820Erwin F. Evert1981622173U.S.A.WyomingParkNorth Fork Shoshone River Drainage; south side of Buffalo Bill Reservoir, ca 3 mi E of Gibbs Bridge at springs.-109.264844.4791707Along dirt road with Ribes aureum, Erigeron lonchophyllus, and Rosa woodsii. Phenology: spores.RMRM341615 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2973Erwin F. Evert198172183U.S.A.WyomingParkAbsaroka Mountains: North Fork Shoshone River Drainage: along Rattlesnake Creek Road, ca 3 mi N of U.S. Hwy 14, 16, and 20.-109.293544.52951745In wet soil along the creek. Phenology: spores.RMRM360902 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4238Erwin F. Evert1982715196U.S.A.WyomingParkAbsaroka Mountains, North Fork Shoshone River Drainage; along U.S. Hwy 14 at Newton Creek.-109.76544.44731901In seeps. Phenology: spores.RMRM357387 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4753Erwin F. Evert1982813225U.S.A.WyomingParkNorth Fork Shoshone River: Absaroka Mountains: ca 3/4 mi E of Pahaska.-109.946344.50532027Phenology: vegetative only.RMRM531688 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5339Erwin F. Evert198375186U.S.A.WyomingParkAbsaroka Mountains: North Fork Shoshone River Drainage; along U.S. Hwy 14, 16 and 20, 0.1-0.3 mi W of Mount of Horse Creek.-109.603944.46181798Wet soil, gravelbar-riparian community. Phenology: vegetative only.RMRM609394 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6859Erwin F. Evert198476188U.S.A.WyomingParkNorth Fork Shoshone River Drainage: Absaroka Mountains: along north side of U.S. Hwy 14, 16, and 20 at Big Game Campground, ca 25 mi W of Cody.-109.603944.46181798In disturbed area. Phenology: spores.RMRM609406 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6868Erwin F. Evert198477189U.S.A.WyomingParkNorth Fork Shoshone River Drainage: Absaroka Mountains: along south side of North Fork Shoshone River, ca 3/4 mi W of Wapiti, near the mouth of Rand Creek.-109.48344.46181707In wet soil of irrigation seepage. Phenology: spores.RMRM361286 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4479Erwin F. Evert1982727208U.S.A.WyomingParkAbsaroka Mountains: North Fork Shoshone River Drainage, ca 1/8 mi N of U.S. Hwy 14 and 3/4 mi E of Yellowstone National Park Entrance.2134With Pinus contorta, Linnaea borealis, and Shepherdia canadensis. Phenology: flowering & fruiting.RMRM335658 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun848Francis B. Current1980626178U.S.A.WyomingCarbonBattle Mountain, base of Buck Camp Draw, 9.5 air mi E of Savery.-107.259441.04052256Artemisia cana overstory. Phenology: spores.RMRM682048 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun241George P. Jones1991622173U.S.A.WyomingNatronaRattlesnake Hills: Cabin Creek, ca 1 mi S of confluence with Soap Creek, ca 12.5 mi E of Garfield Peak.-107.018542.78571871Juncus balticus community adjacent to stream channel in narrow riparian zone; soil mixed alluvium with gravel, cobbles, and small boulders. Phenology: spores.RMRM682047 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun277aGeorge P. Jones1991714195U.S.A.WyomingNatronaBates Hole: Bates Creek, ca 0.25 mi N of crossing of Wyo Hwy 487.-106.411342.6131728Populus angustifolia woodland on mixed alluvial soil in floodplain; understory of Acer negundo and dense Bromus inermis. Phenology: vegetative only.RMRM643958 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun506Gillian Walford S. Gottschlich and R. Bechtloff1993617168U.S.A.WyomingParkShoshone National Forest: North Fork Shoshone River Valley: south side of North Fork Shoshone River, E of Big Game Campground, 27 1/4 air mi W of Cody.-109.603244.46181798Streamside bar with sandy and gravelly alluvium; Salix exigua community with Lupinus polyphyllus. Phenology: spores.RMRM392211 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun56-29Harold F. Eppson C. S. Gilbert1956625177U.S.A.WyomingTetonOld road above Turpin Meadow Bridge.-110.263443.86632103Phenology: spores.RMRM93277 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun135Willard N. Clute1920715197U.S.A.ArizonaCoconinoPainted Desert near Tuba.-111.2288936.11931463Common around reservoir. 15-31 Jul 1930 Phenology: spores.RMRM77784 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2417J. Francis Macbride1914630181U.S.A.WyomingAlbanyRock River.-105.971541.73492134Sandy stream banks. Phenology: spores.RMRM544387 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun25Jan Pollet1989625176U.S.A.WyomingPlatteAlong Cottonwood Creek, 30 road mi NW of Wheatland.-105.214142.29791616Creekbed, usually wet early spring, dry mid summer. Phenology: spores.RMRM544386 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun370Jan Pollet198988220U.S.A.WyomingPlatteLaramie River, 12 road mi NE of Wheatland.-104.861742.12591432Creek banks and grassland. Phenology: vegetative only.RMRM544385 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun422Jan Pollet198988220U.S.A.WyomingPlatteLaramie River, 12 road mi NE of Wheatland.-104.861742.12591432South bank of river. Phenology: vegetative only.RMRM544097 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun629Jan Pollet198992245U.S.A.WyomingPlatteNorth Platte River: S of U.S. Hwy 26, 0.5 road mi S of Guernsey.-104.744342.25491323Phenology: vegetative only.RMRM544096 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun773Jan Pollet198998251U.S.A.WyomingPlatteDeadhead Creek, 6 road mi E of Wyo Hwy 34, 12 road mi SW of Wheatland.-105.166241.83451550Creekbanks and creekbed. Phenology: vegetative only.RMRM576964 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun104Jane M. Struttmann1992629181U.S.A.WyomingFremontNorth Bank of Sweetwater River, The Nature Conservancy Sweetwater Preserve, ca 3 1/4 air mi SW of Sweetwater Station, ca 13 air mi SE of Lander.-108.277942.48252018Grassy banks and willow thickets adjacent to river. Phenology: spores.RMRM276672 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun130aJay N. Holliday, Jr.1964717199U.S.A.WyomingAlbanyLaramie Range: Medicine Bow National Forest: Pole Mountain District: W of Eagle Rock, along the North Branch Middle Fork Lodgepole Creek.-105.373341.28282500Moist bottomland along the creek. Phenology: vegetative only.RMRM208810 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1404John F. Reed Mildred S. Reed1947815227U.S.A.WyomingTetonJackson Hole Wildlife Park.-110.554943.86662057Among sagebrush. Phenology: vegetative only.RMRM211763 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1841John F. Reed Mildred S. Reed194862154U.S.A.WyomingTetonJackson Hole: E of Moran; Snake River at Simons.-110.572643.86182057Among willows and sedges. Phenology: vegetative only.RMRM321890 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9Mary Alice Sanguinetti Keith H. Dueholm197875186U.S.A.WyomingConverseBetty Reservoir, County Road 34.-105.4743.39881432Phenology: spores.RMRM338009 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.Max H. Schroeder Gary L. Ranck1976810223U.S.A.WyomingCarbonStratton Hydrology Study Area: Sane Creek Bottom.-107.137641.417921342439Sagebrush rangeland. Phenology: spores.RMRM681994 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun143Michael Oliver1991625176U.S.A.WyomingLaramieSoutheast Plains: Horse Creek, ca 1.3 mi WNW of Meriden and U.S. Hwy 85, ca 0.6 mi S of Goshen County.-104.348441.55491518Acer negundo savanna on first terrace along intermittent stream on alluvial soil; understory of milkweed, timothy, brome and bluegrass. Phenology: spores.RMRM681995 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun144Michael Oliver1991625176U.S.A.WyomingLaramieSoutheast Plains: Horse Creek, ca 1.3 mi WNW of Meriden and U.S. Hwy 85, ca 0.6 mi S of Goshen County.-104.348441.55491518Acer negundo savanna on first terrace along intermittent stream on alluvial soil; understory of milkweed, timothy, brome and bluegrass. Phenology: spores.RMRM681825 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun174Michael Oliver1991627178U.S.A.WyomingGoshenSoutheast Plains: Dater Creek, ca 12 air mi SW of La Grange.-104.400141.61571530Glycyrrhiza lepidota/Hordeum jubatum community along first terrace above stream on sandy alluvium. Phenology: spores.RMRM681996 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun268Michael Oliver199171182U.S.A.WyomingPlatteSoutheastern Plains: Spring Creek between El Rancho and Coleman roads, W of I-25 and Coleman Butte.-105.057542.28361460Salix amygdaloides community with scattered Populus angustifolia on first terrace on banks of intermittent stream; understory of Bromus intermis and Melilotus officinalis. Phenology: spores.RMRM681823 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun396Michael Oliver1991710191U.S.A.WyomingNiobraraEastern Plains: Little Muddy Creek, SW of Keeline.-104.779842.69281530Salix amygdaloides open woodland with dense graminoid and forb understory on loam sand on floodplain terrace. Phenology: fruiting.RMRM681824 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun427Michael Oliver1991714195U.S.A.WyomingNiobraraEastern Plains: Sage Creek, ca 20 mi N of Lusk.-104.353843.06621259Scattered Populus deltoides with patches of Salix exigua and Carex lanuginosa adjacent to channel on mixed alluvium. Phenology: fruiting.RMRM644060 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun52Michael Oliver1991614165U.S.A.WyomingPlatteSoutheast Plains: Horseshoe Creek, off Horseshoe Creek Road, ca 8 air mi SW of Glendo and I-25.-105.194642.4271520Open stand of mature Populus angustifolia with understory of Acer negundo and P. angustifolia saplings and Bromus inermis on streambed terrace. Phenology: spores.RMRM681826 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun70Michael Oliver1991828240U.S.A.WyomingPlatteSoutheast Plains: Cooney Creek, near Cooney Hills Road; ca 5.5 mi SW of junction with Palmer Canyon Road SW of Wheatland.-105.166241.98111527Salix exigua/S. amygdaloides community on fine sandy alluvium with patches of coarse sand and gravel in floodplain; understory with Echinochloa muricata, Agrostis stolonifera, Polypogon monspeliensis, and Asclepis sp. Phenology: fruiting.RMRM644061 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun78Michael Oliver1991616167U.S.A.WyomingPlatteSoutheast Plains: south bank of Laramie River, ca 1 mi E of Uva and N of landfill.-104.900942.12591350Mature Populus deltoides with occasional Salix amygdaloides along old side channels and understory of Bromus inermis; on sandy-rocky soils of stream terrace. Phenology: spores.RMRM703760 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun14Michele Barlow George Jones199165156U.S.A.WyomingLaramieSoutheastern Plains: Spring Creek.-105.133841.64841829Salix amygdaloides community along stream channel on alluvial soil.RMRM724245 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun140Michele Barlow George Jones1991710191U.S.A.WyomingNatronaFoothills of Casper Mountain: Big Spring of Middle Fork Elk Creek.1841Betula occidentalis/Salix planifolia thicket with understory of Cornus sericea on sandy-silty soils. Phenology: spores.RMRM682145 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun197Michele Barlow199186218U.S.A.WyomingNatronaNorth Platte River Valley: east bank of North Platte River, ca 0.1 mi N of confluence of Bates Creek.-106.607842.70041597Salix exigua community with open herbaceous layer of Poa pratensis, Hordeum jubatum, and Cirsium arvense on floodplain of cobbles and alluvium. Phenology: vegetative only.RMRM703287 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun285Michele Barlow Steve Kettler199268160U.S.A.WyomingCampbellEastern Plains: Twentymile Creek, ca 3 mi NW of Twentymile Butte and 16 air mi NW of Gillette.-105.865244.49831234Artemisia cana var. cana stand on terrace above stream. Clay soil. Phenology: fruiting.RMRM176699 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun38-201O. A. Stevens J. F. Brenckle193872183U.S.A.WyomingParkYellowstone National Park: Yellowstone [Lake] E of Fishing Bridge.-110.366744.55852357Low beach along shore of lake. Phenology: spores.RMUSFS400021 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun47225Philip V. Woodhead192489222U.S.A.WyomingSheridanBighorn National Forest: at Experimental Plot No 3.Phenology: vegetative only.RMRM293417 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun76R. E. Ries D. W. Sabinske1973622173U.S.A.WyomingCampbellNorth Prong of Thunder Creek and Little Thunder Creek.-105.250743.67071329Stream flood plain; saltgrass, western wheatgrass, blue grama; loamy, bare, clayey. Phenology: vegetative only.RMUSFS400022 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun42R. H. Ohl19287183U.S.A.WyomingTetonTeton National Forest: Arizona Meadow.-110.625343.92252042Sandy loam soil; moist meadowland; abundant. Phenology: vegetative only.RMRM391294 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1441Robert J. Hill1974529149U.S.A.WyomingNatronaGreat Divide Basin and adjacent regions: Devils Gate, along the Sweetwater River near the Sun Bell Ranch.-107.199642.45291829Occasional on edge of field plain. Phenology: spores.RMRM561148 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun19967Ralph E. Brooks Carol Kuhn199079190U.S.A.WyomingSubletteHoback River, 2.5 mi NW Bondurant.-110.433643.22781981Sandy bars and exposed banks bordered by willow thickets along river, area next to highway parking area, plants abundant. Phenology: spores.RMRM532813 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5889Richard W. Scott198762153U.S.A.WyomingWashakieTen Sleep Creek near the mouth of Ten Sleep Canyon.-107.360444.15491463Streamsides. Phenology: spores.RMRM288707 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1273Robert D. Dorn1971621172U.S.A.WyomingLincolnSnake River Canyon.-110.904543.19671768River bank associated with Equisetum hyemale; common. Phenology: spores.RMRM288717 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1460Robert D. Dorn197194247U.S.A.WyomingCarbon10 mi ESE of Encampment.-106.614841.16792256Moist bank associated with Cirsium, Prunus, and Rosa; moderately abundant. Phenology: spores.RMRM601008 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5969Robert D. Dorn199568159U.S.A.WyomingBig Horn1.5 mi E of Lucerne.-108.146943.73941310Roadside ditch with Poa and Bromus. Phenology: spores.RMRM600488 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6607Robert D. Dorn199592245U.S.A.WyomingUintaBear River at Evanston.-110.936841.26462073Riverbank with E. arvense and E. variegatum. Phenology: spores.RMRM315911 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun491Robert W. Lichvar1977627178U.S.A.WyomingTetonGros Ventre Mountains: Gros Ventre River.-110.596443.6341951Growing with Lappula redowskii and Chrysothamnus nauseosus; infrequent on rocy area. Phenology: spores.RMRM315653 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun532Robert W. Lichvar1977630181U.S.A.WyomingTetonGros Ventre Mountains: Goosewing Creek.-110.41443.41372164Growing with Habenaria sp. and Galium sp.; frequent on moist, dark soil. Phenology: vegetative only.RMRM315652 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun622Robert W. Lichvar197776187U.S.A.WyomingTetonGros Ventre Mountains: Granite Creek.-110.433643.34221981Growing with Saxifraga odontoloma and Anaphalis margaritacea; frequent in moist, dark soil. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3268Amy J. Roderick199784216U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: North Platte River running through Saratoga, ca 0.5 air mi from town center.-106.793441.44682070Shaded banks of river lined with cottonwood and willow. Phenology: spores.RMRM711881 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun72459Ronald L. Hartman2001721202U.S.A.New MexicoSandovalValles Caldera National Preserve: Jemez Mountains: Redondo Creek, 2.2-1.1 air mi SE of west entrance.-106.59758335.8562782469Meadow, ponderosa pine savanna, stream bank. Phenology: vegetative only.RMRM318240 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun19151Stanley L. Welsh B. Welsh1979720201U.S.A.WyomingSweetwaterSeedskadee National Wildlife Refuge: meander bend along Green River.-109.971441.94131932Populus woods common, gravelly soil. Phenology: spores.RMUSFS400026 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun233Schofield Woods192291244U.S.A.WyomingLincolnWyoming National Forest: near mouth of Murphy Creek.-110.827243.06171829Level slope; sandy loam soil; with willow, tufted hair grass, and slender wheat grass; abundant on creek. Phenology: vegetative only.RMRM77974 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun172Seymour S. Sharp1912630182U.S.A.WyomingSheridanLittle Goose above Sheridan.-106.937844.73171143Grassy slope. Phenology: spores.RMRM703374 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun324Steve Kettler199178189U.S.A.WyomingPlatteSoutheastern Plains: Indian Creek, ca 7.5 mi W of Glendo Reservoir and 1 mi S of Converse County.-105.21742.58721524Dense Carex nebrascensis community along stream channel in sandy gravel flooplain. Phenology: fruiting.RMRM681993 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun627Steve Kettler1991727208U.S.A.WyomingConverseSoutheast Plains: Wagon Hound Creek, ca 0.5 mi E of Wyo Hwy 94, ca 9 mi S of Douglas.-105.394142.64521478Mixed-age Acer negundo community along stream terrace with understory of Bromus inermis. Phenology: spores.RMRM366543 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. BraunRH 104Steve Kilpatrick J. L. Robinson198269160U.S.A.WyomingGoshenWyoming Game and Fish Department's Rawhide unit along the North Platte River, ca 3.3 air mi SE of Lingle, ca 6.8 air mi WNW of Torrington.-104.30642.10071250Phenology: vegetative only.RMRM366665 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. BraunRH 197Steve Kilpatrick J. L. Robinson198269160U.S.A.WyomingGoshenWyoming Game and Fish Department's Rawhide unit along the North Platte River, ca 3.3 air mi SE of Lingle, ca 6.8 air mi WNW of Torrington.-104.30642.10071250Wetland. Phenology: vegetative only.RMRM69181 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun598Vie Willits191078189U.S.A.WyomingSheridanJackson Creek.-106.998544.68761280Grassy swampy soil. Phenology: spores.RMRM602569 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun14802Walter Fertig199466157U.S.A.WyomingWashakieWest Slope Bighorn Mountains, TNC Ten Sleep Preserve, Canyon Creek Canyon, wet seep on north side of creek along Blue Trail, NW of switchbacks.-107.280144.0111646Moist sand on edge of trail; with Rhus trilobata, Yucca, Equisetum arvense. Phenology: spores.RMRM645440 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun18443Walter Fertig1998727208U.S.A.WyomingLaramieSoutheast Plains: banks of Spring Creek, 2 mi S of Federal and 3 mi E of Mesa Mountain; ca 5 air mi N of Wyo Hwy 201 (Happy Jack Road).-105.123741.24442012Banks of meandering stream channel on grassy terrace dominated by Agrostis stolonifera and Poa pratensis; vegetative cover 100%, but shorter than adjacent Bromus inermis/Alopecurus meadows; with Achillea, Equisetum laevigatum, Helianthus, Elymus lanceola Phenology: vegetative only.RMRM288707 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1273Robert D. Dorn1971621172U.S.A.WyomingLincolnSnake River Canyon.-110.904543.19671768River bank associated with Equisetum hyemale; common. Phenology: spores.RMRM288717 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1460Robert D. Dorn197194247U.S.A.WyomingCarbon10 mi ESE of Encampment.-106.614841.16792256Moist bank associated with Cirsium, Prunus, and Rosa; moderately abundant. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3363Amy J. Roderick199787219U.S.A.WyomingCarbon[location and coordinates withheld]1981Wet open meadow. Phenology: spores.RMRMRS8 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.Herbert W. Graham1926712193U.S.A.Arizonano countySanta Rita Mountains: White House Canyon.1646Phenology: spores.RMRMRS Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun67R. Szaro1981715196U.S.A.ArizonaGrahamCoronado National Forest: near Safford; Pinaleno Mountains; Wet Canyon.-109.80432.6511737Phenology: fruiting.RMRM759007 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun52180B. E. Nelson200096250U.S.A.ColoradoJacksonNorth-central Colorado: North Park: along Colo Hwy 125 just N of the Canadian River, ca 1/3 mi N of Cowdrey; ca 9.5 air mi N of Walden.-106.307440.86472402Moist to wet meadow. Phenology: spores.RMRM762892 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun53487B. E. Nelson2001628179U.S.A.ColoradoRouttNorth-central Colorado: Elkhead Mountains: along Salt Creek and County Road 46, ca 1.5 air mi N of Rattlesnake Butte, ca 9 air mi SW of Clark; ca 12 air mi NW of Steamboat Springs.-107.005640.593421342146Meadows along small stream. Phenology: vegetative only.RMRM768699 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun60204B. E. Nelson2003811223U.S.A.New MexicoSandovalValles Caldera National Preserve: Jemez Mountains: from the west boundary E, above and S of San Antonio Creek, ca 1.7 air mi N of San Antonio Mountain, ca 18-18.5 air mi WNW of Los Alamos.-106.621935.957625602591In and near Carex marshes. Phenology: vegetative only.RMRM834536 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun68179B. E. Nelson David Scott200662153U.S.A.WyomingTetonGrand Teton National Park and Vicinity: Jackson Hole: at east park boundary on U.S. Hwy 26/287, just N of Halfmoon Lake, ca 4 air mi ESE of Moran; ca 29.5 air mi NE of Jackson.-110.423343.83232070Willow carr. Phenology: spores.RMRM834540 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1261David Scott2006629180U.S.A.WyomingTetonGrand Teton National Park and Vicinity: Jackson Hole: near Schwabachers Landing on the Snake River, ca 5 air mi NNE of Moose; ca 12 air mi SW of Moran.-110.67143.71262000Sagebrush bench above the river. Phenology: spores.RMRM834542 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun172David Scott B. E. Nelson, Nancy Bockino200668159U.S.A.WyomingTetonGrand Teton National Park and Vicinity: Jackson Hole: Bar BC historic ranch, ca 3 air mi NNW of Moose; ca 14 air mi SW of Moran.-110.693743.6951997Sagebrush community with scattered cottonwood and willow. Phenology: spores.RMRM834539 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2331David Scott Amanda Richardson2006726207U.S.A.WyomingTetonGrand Teton National Park and Vicinity: Jackson Hole: near Two Ocean Lake, ca 6 air mi N of Moran; ca 21.5 air mi NE of Moose.-110.501743.92132195Pinus contorta and Picea engelmannii forest with small openings. Phenology: spores.RMRM834538 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2430David Scott Diane Abendroth2006728209U.S.A.WyomingTetonGrand Teton National Park and Vicinity: John D. Rockefeller Jr. Memorial Parkway: near Polecat Creek, ca 32.5 air mi N of Moose; ca 22.3 air mi NNW of Moran.-110.709144.11822105Swift-moving stream and immediately adjacent wetland. Phenology: spores.RMRM834537 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2866David Scott Andrew Bishop200688220U.S.A.WyomingTetonGrand Teton National Park and Vicinity: Jackson Hole: near Two Ocean Lake, ca 4 air mi N of Moran; ca 19.5 air mi NNE of Moose.-110.540443.90632121Lodgepole pine forest with small openings and small seasonal stream. Phenology: spores.RMRM834541 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun776aDavid Scott2006619170U.S.A.WyomingTetonGrand Teton National Park and Vicinity: Jackson Hole: near Gros Ventre Junction, ca 4 air mi S of Moose; ca 9 air mi NNE of Jackson.-110.699243.59581993Riverine community adjacent to river. Phenology: spores.RMRM834535 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun83073Ronald L. Hartman2006630181U.S.A.WyomingTetonGrand Teton National Park and Vicinity: Jackson Hole: Spread Creek near crossing of U.S. Hwy 26/89/191.-110.537843.79162079Creek bottom and bottom land. Phenology: spores.RMRM907514 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4118David Scott Tacheeni Scott2007630181U.S.A.WyomingTetonBridger-Teton National Forest: Teton Wilderness: near Arizona Creek, ca 14.5 air mi NW of Moran; ca 25.5 air mi N of Moose.-110.641644.01782115Herbaceous montane meadow adjacent Picea engelmannii forest bottomland and creek. Phenology: spores.RMRM907513 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5310David Scott Klara Varga200789221U.S.A.WyomingTetonGrand Teton National Park and Vicinity: Jackson Hole: on west shore of Jackson Lake near Wilcox Point, ca 15.5 air mi NW of Moran; ca 23.5 air mi N of Moose.-110.714643.99372067Salix spp. and Picea engelmannii bottomland and cobble beaches of montane stream. Phenology: spores.RMRM907512 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun86648Ronald L. Hartman David Scott2007815227U.S.A.WyomingTetonGrand Teton National Park and Vicinity: John D. Rockefeller Jr. Memorial Parkway: Huckleberry Hot Springs, from springs to Polecat Creek and bridge, ca 1.3 air mi NW of Flagg Ranch, 0.3 air mi N of dogleg in Grassy Lake Road.-110.68444.1142091Hot springs and down outlet to creek and bridge. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1271Neil Snow1987713194U.S.A.WyomingTetonSouthwestern Absarokas: Teton Wilderness.-110.203143.90972256Open wet meadow. No other locality data is provided. -RCRRMRM768738 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun78423Ronald L. Hartman2003811223U.S.A.New MexicoSandovalValles Caldera National Preserve: Jemez Mountains: East Fork Jemez River, short segment in Preserve ca 1 air mi SW of El Cajete (center of caldera).-106.5750535.8276524142435Along river with blue spruce and white fir on slopes, willow and birch scattered on bank. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2289Neil Snow1988619171U.S.A.WyomingParkSouthwestern Absarokas: South Fork Shoshone River below Ishawooa Mesa, ca 35 air mi SW of Cody.-109.583744.18632134Valley bottom in mixed Artemisia-Salix community.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun305Neil Snow1987612163U.S.A.WyomingTetonSouthwestern Absarokas: Teton Wilderness: vicinity of packbridge crossing North Buffalo Fork, ca 7 mi NW of Togwotee Pass.-110.203143.85192195Open lodgepole forest along river.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3622Neil Snow1988713195U.S.A.WyomingParkSouthwestern Absarokas: ca 31 air mi SW of Cody; along the Shoshone River on the TE Ranch.-109.503244.27332042Cottonwood bottoms along river.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4100Neil Snow1988729211U.S.A.WyomingParkSouthwestern Absarokas: Teton Wilderness: vicinity and junction of Butte Creek and Thorofare Creek.-109.881544.12682545Gravel bars and forest edge.RMRM99246 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun366A. C. McIntosh1924622174U.S.A.South DakotaFall RiverErskine-Hot Springs.-103.509343.451910571140Banks of stream. Phenology: spores.RMRM99246 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun366Arthur C. McIntosh1924622174U.S.A.South DakotaFall RiverErskine, Hot Springs;-103.509343.451910571140Banks of stream. Phenology: spores.RMRM709791 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun194Cheryl Mayer2000831244U.S.A.South DakotaPenningtonBlack Hills: Black Elk Wilderness: along Grizzly Bear Creek S of Mt. Rushmore, ca 7.8 air mi SE of Hill City.-103.451243.86441426White spruce, paper birch, ponderosa pine, and bur oak association; along creek. Phenology: spores.RMRM770766 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun61467B. E. Nelson200479191U.S.A.New MexicoSandovalValles Caldera National Preserve: Jemez Mountains: along East Fork Jemez River, ca 3/4 - 1 air mi E of NM Hwy 4, ca 8 air mi NE of Jemez Springs; ca 15 air mi WSW of Los Alamos.-106.576835.82892423Flats above the river. Phenology: spores.RMRM568075 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10486Gary E. Larson James R. Johnson1991621172U.S.A.South DakotaLawrenceIntersection of Hwy 385 and Terry Peak Road.-103.828844.29441881Growing through asphalt on shoulder on old portion of road; occasional. Phenology: spores.RMRM346213 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7836Gary E. Larson1982712193U.S.A.South DakotaLawrenceRickover Springs.-103.843444.15141823Margin of spring-fed stream, steep bank; common. Phenology: spores.RMRM110769 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1565Herman E. Hayward1927628179U.S.A.South DakotaFall RiverHot Springs, Hot Brook Creek.-103.509343.451910571140Streamside; elm, willow, and hackberry association. Phenology: spores.RMRM710181 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11280Hollis Marriott199076187U.S.A.South DakotaLawrenceBlack Hills: Black Hills National Forest: Bear Gulch NNE of Tinton, ca 0.2 mi above confluence with Knight Spring drainage, ca 9 air mi WSW of Spearfish.-104.035944.45061371Seep at base of slope in creek bottom. Phenology: spores.RMRM365599 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9536Hollis Marriott198563154U.S.A.South DakotaCusterJewel Cave National Monument: Hell Canyon, canyon bottom E of Prairie Dog Spring.-103.841443.726915791585In draw below spring. Elev closer to 5200 f (USGS 7.5) G. Bryson Phenology: spores.RMRM365559 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9665Hollis Marriott1985624175U.S.A.South DakotaCusterJewel Cave National Monument: Chokecherry Spring.-103.828443.72141570Spring and small meadow in Ponderosa pine forest; on mud. Phenology: spores.RMRM394089 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32Kris Sletten1983611162U.S.A.South DakotaGregoryLake Berry.-99.142843.0843621Pond margin; occasional. Phenology: spores.RMUSFS400925 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9Robert R. Hill1928711193U.S.A.South DakotaPenningtonHarney National Forest: Everly Field.-103.384343.89441280On level slope; deep loam soil; timber, yellow pine type. Phenology: spores.RMRM70129 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun22S. S. Visher191085217U.S.A.South DakotaHardingCave Hills.-103.502645.81138531067Brookside. Phenology: vegetative only.RMRM70131 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun23S. S. Visher1910711192U.S.A.South DakotaHardingLittle Missouri River Valley: 25 mi N of Ashcroft. [ends up in North Dakota]-103.936545.94488841006Open woods. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1126B. A. Packer T. McGowan1997630181U.S.A.WyomingLaramieLaramie Range: ca 3 road mi E of Buford along Lone Tree Creek; ca 23.5 air mi SE of Laramie.-105.23541.08962423Creekside. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1654B. A. Packer J. Brondum and T. McGowan1997713194U.S.A.WyomingAlbanyLaramie Range: Laramie Peak Wildlife Habitat Management Area: along Ashley Creek, ca 32 air mi NE of Rock River.-105.380142.025221002201Creekside. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2085B. A. Packer J. Brondum and T. McGowan1997724205U.S.A.WyomingAlbanyLaramie Range: along Horseshoe and Soldier creeks, ca 20 air mi SE of Douglas.-105.35242.38442216Creekside, granite outcrops, and mountain meadow. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2356B. A. Packer J. Brondum and T. McGowan1997729210U.S.A.WyomingAlbanyLaramie Range: Baldy Knob, ca 25 air mi S of Douglas.-105.332442.284121642262Creekside Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun41908B. E. Nelson1997722203U.S.A.WyomingConverseLaramie Range: above Big Bear Canyon, ca 1.5 air mi SW of South Sawtooth Mountain and ca 1.5 air mi E of Blacktail Peak, ca 29 air mi SSW of Douglas; ca 13 air mi W of Esterbrook.-105.605242.368623652390Deep pockets among granite boulders. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun41969B. E. Nelson1997722203U.S.A.WyomingAlbanyLaramie Range: near the head of Big Bear Canyon, ca 1.3 air mi SW of South Sawtooth Mountain and ca 1.7 air mi E of Blacktail Peak, ca 29 air mi SSW of Douglas; ca 13 air mi W of Esterbrook.-105.624642.368622072378Along a small stream in aspen or aspen-mixed conifer forest. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun42592B. E. Nelson1997812224U.S.A.WyomingAlbanyLaramie Range: along Three Cripples Creek ca 1-1.5 air mi W of Harris Park or Forest Road 633, ca 1.5-2 air mi ESE of Esterbrook; ca 25 air mi S of Douglas.-105.332442.413116951798Brushy canyon bottom along the stream. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun42640B. E. Nelson1997813225U.S.A.WyomingConverse[location and coordinates withheld]1713Roadside. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun42807B. E. Nelson1997814226U.S.A.WyomingConverseLaramie Range: Rocky Ford Creek in Downey Park ca 3/4 mi N of Albany County on Old Fort Fetterman or County Road 16, ca 17-17.8 air mi W of Esterbrook; ca 28 air mi SW of Douglas.-105.705442.438322802298Streambank and low areas along the stream. Phenology: spores.RMRM153003 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2014Alan A. Beetle193766157U.S.A.ColoradoDouglasCastle Rock.1829Sandy bank of stream. Phenology: vegetative only.RMRM131883 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11675Aven Nelson1931815227U.S.A.New MexicoSandovalJemez Springs: La Cueva Park.-106.636335.862992332Bottom lands. Phenology: vegetative only.RMRM540748 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5111Betsy E. Neely1988610162U.S.A.ColoradoYumaArikaree River: ca 3 mi NE of Beecher Island; Beecher Island NW Quadrangle.1057River bottom dominated by Populus deltoides, Salix amygdaloides, Panicum virgatum and Sorghastrum. Phenology: spores.RMRM147964 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun12457Bassett Maguire George Piranian1935715196U.S.A.ColoradoMesaArtemisia belt along CO HWY 65 ca 5 mi; above junction with U.S. Hwy 50.Sandy river bottom. Phenology: spores.RMRM13527 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun103Carl F. Baker F. S. Earle and S. M. Tracy1898625176U.S.A.ColoradoMontezumaMancos.2134Phenology: spores.RMRM157816 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun103Carl F. Baker F. S. Earle and S. M. Tracy1898625176U.S.A.ColoradoMontezumaMancos.2134Phenology: spores.RMRM157815 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun357Carl F. Baker190177188U.S.A.ColoradoGunnisonRegion of the Gunnison Watershed: Gunnison.Phenology: spores.RMRM33028 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun357Carl F. Baker190177188U.S.A.ColoradoGunnisonRegion of the Gunnison Watershed: Gunnison.Phenology: spores.RMRM204116 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3884C. L. Porter1946621172U.S.A.ColoradoMoffatMantle Ranch: Yampa River: Yampa Canyon.Sandbars along the river. Phenology: spores.RMRM204009 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3943C. L. Porter1946626177U.S.A.ColoradoRouttBetween Craig and Steamboat Springs.Roadside banks and ditches. Phenology: spores.RMRM274894 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9600C. L. Porter Marjorie W. Porter1964715197U.S.A.ColoradoWeld3.2 miles south of the Wyoming Line on U.S. Hwy 87 at a roadside park.1829Common, dry meadow with thistles. Phenology: spores.RMRM133208 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1450Earl F. Castetter1932530151U.S.A.New MexicoSandovalCochiti.-106.331535.617191829Phenology: spores.RMRM127854 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun690Earl F. Castetter1931811223U.S.A.New MexicoSandovalJemez Mountains: La Cueva.-106.636335.862992332Dry hills. Phenology: vegetative only.RMRM117417 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1137Earl L. Johnston1927626177U.S.A.ColoradoWeldGrover.Sloughs. Phenology: spores.RMRM101663 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun261Earl Lynd Johnston George G. Hedgcock19177182U.S.A.ColoradoBoulderAllenspark: ca 7 mi N on road to Estes Park.Phenology: vegetative only.RMRM117647 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun352Earl Lynd Johnston191781213U.S.A.ColoradoJacksonW of Walden.Phenology: spores.RMRM117651 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun570Earl Lynd Johnston1917622173U.S.A.ColoradoHuerfanoCucharas.Campsite. Phenology: vegetative only.RMRM101667 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun860Earl Lynd Johnston George G. Hedgcock1917625176U.S.A.ColoradoCusterClay Ranger Station: Westcliffe.Phenology: spores.RMRM117648 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun860Earl Lynd Johnston1917625176U.S.A.ColoradoCusterWestcliffe: Ranger Station.Wet cliffs. Phenology: spores.RMRM101662 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun861Earl Lynd Johnston George G. HedgcockU.S.A.ColoradoCusterWestcliffe. Ranger Station.Clay. Phenology: spores.RMRM117650 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun861Earl Lynd Johnston1917625176U.S.A.ColoradoCusterWestcliffe: Ranger Station.Phenology: spores.RMRM101666 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun883Earl Lynd Johnston George G. Hedgcock1917623174U.S.A.ColoradoHuerfanoGardner: on the road to Westcliffe.Phenology: spores.RMRM117600 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun883Earl Lynd Johnston1917623174U.S.A.ColoradoCusterRoad to Westcliffe.Phenology: spores.RMRM79405 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun124Ernest P. Walker1912619171U.S.A.ColoradoMontroseParadox.1646Wet stream banks. Phenology: spores.RMRM53124 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1077Francis Ramaley1905610161U.S.A.ColoradoBoulderNear Boulder.1700Meadow. Phenology: spores.RMRM23213 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauna.110Francis Ramaley190079190U.S.A.ColoradoBoulderNear Boulder.Phenology: spores.RMUSFS400694 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun200Gasper A. Loughridge1934621172U.S.A.ColoradoLa PlataSan Juan National Forest: Hermosa Creek at Dutch.2256Frequent, 45 degree south slope, ponderosa pine/timber in clay loam with Rhus, Anogara and Agropyron. Phenology: spores.RMRM312224 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun120George E. Osterhout1920722204U.S.A.ColoradoWeldWindsor.Phenology: spores.RMRM157812 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1309George E. Osterhout1896828241U.S.A.ColoradoLarimerHome Post Office.-105.69240.69642286Phenology: vegetative only.RMRM157814 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1310George E. Osterhout18966153U.S.A.ColoradoWeldNew Windsor: near river.Phenology: spores.RMRM529389 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun78Gretchen Smith Becky Sharp1987513133U.S.A.ColoradoLas AnimasWeston: ca 3.8 mi E of Weston on CO Hwy 12.2042Disturbed roadsides. Phenology: spores.RMRM392210 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun632Harold F. Eppson194866158U.S.A.ColoradoLarimerVirginia Dale.Phenology: spores.RMRM53125 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1046Harvey Markman1905530150U.S.A.ColoradoBoulderBoulder.1700Phenology: spores.RMRM98635 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1034Hazel M. Schmoll1924612164U.S.A.ColoradoAlamosaAlamosa: Rio Grande River: north side.Mudflat. Phenology: spores.RMRM87026 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3634Ira W. Clokey192078190U.S.A.ColoradoDouglasWolhurst.1616Moist soil. Arapahoe County ca. 1/4 mi N of Douglas County. Phenology: spores.RMRM48120 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3996J. H. Colden1895712193U.S.A.ColoradoLarimerFort Collins: Poudre flats.Phenology: vegetative only.RMRM532990 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2007JoAnn W. Flock1988711193U.S.A.ColoradoRouttRoutt National Forest: Hinman Park: near Hinman Campround.2330Sagebrush meadow near pond. Phenology: spores.RMUSFS400919 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun46L. D. J. Chaves191587219U.S.A.ColoradoSaguacheRio Grande National Forest: Alder Creek.2500Pasture, in moist soil. Phenology: vegetative only.RMRM30010 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6603P. A. Rydberg F. K. Vreeland199079190U.S.A.ColoradoHuerfano/Las AnimasWest Spanish Peak.30003800Phenology: spores.RMUSFS400923 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1016Paul L. Ginter1946620171U.S.A.ColoradoMoffatYampa River: near Mantel Cave.1554Common, 1% north slope in moist sand along river. Phenology: spores.RMUSFS400920 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun337Paul L. Ginter1941530150U.S.A.ColoradoLarimerRoosevelt National Forest: E of Poudre. E1493Common, level slope in wet clay loam. Phenology: spores.RMUSFS400921 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun340Paul L. Ginter1941614165U.S.A.ColoradoLarimerNear Roosevelt National Forest: 1/4 mi E of Poudre River.1493Common, level slope in sandy clay loam. Phenology: spores.RMUSFS400922 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun136Peter Keplinger1911U.S.A.ColoradoArchuletaSan Juan National Forest.Phenology: vegetative only.RMRM702977 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8689Robert D. Dorn2001524144U.S.A.ColoradoYumaArikaree River.1310River bank with Carex and Scirpus. Phenology: spores.RMRM296552 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2125Ronald L. Hartman1968625177U.S.A.New MexicoColfaxPhilmont Scout Ranch, near Cimarron: South Ponil Canyon, 1.2 mi W of Ponil.-105.0562936.61562240Common along stream. Phenology: spores.RMUSFS400693 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. BraunA-2S. Duval Anderson1925726207U.S.A.ColoradoHinsdaleSan Juan National Forest: Bridge Ranger Station.2347Pasture area in dry, rocky clay. Phenology: spores.RMRM339057 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1366Vlad Siplivinsky1981626177U.S.A.ColoradoMesaGrand Mesa National Forest: Coal Creek Trail: junction of oak and aspen belts. NE2560Wet ground by stream. Phenology: spores.RMRM64255 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4933W. W. Robbins190866158U.S.A.ColoradoPuebloBeulah.Phenology: vegetative only.RMRM338703 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun15867William A. Weber Ron Wittmann1980622174U.S.A.ColoradoParkValley of Platte River; just W of Bailey; just E of Shawnee.Abundant in wet depressions below road, northwest facing steep slope with Granite outcrops. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32187Ronald L. Hartman Bruce Embury1992511132U.S.A.WyomingLincolnSouthern Salt River Range and Vicinity: Gannett Hills : 0.5-1 air mi E of Idaho; 13 air mi N of Border Junction.-111.02138942.40666719142222South exposure, steep rocky slopes and grassy or sagebrush ridge and wet roadside below. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun21511B. E. Nelson Michelle Nelson1991627178U.S.A.IdahoMadisonTarghee National Forest: Big Hole Mountains: branch of Hawley Gulch between Buckskin Morgan and Windy Ridges, ca 16.5 air mi SE of Rexburg.-111.575943.64871935Moist to wet meadow along small stream.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun58590Ronald L. Hartman1997716197U.S.A.WyomingAlbanyLaramie Range: Wallace Draw area, ca 7.5 air mi SE of Garrett.-105.476942.054521642195Grassland. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10658Stuart Markow1992812225U.S.A.IdahoFremontTarghee National Forest: Island Park Plateau: adjacent to Osborne Springs, ca 16 air mi NE of Ashton.-111.405344.30941859Roadside, mostly weeds and grasses.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1255Stuart Markow B. E. Nelson and Michelle Nelson1991623174U.S.A.IdahoTetonTarghee National Forest: East Slope Big Hole Mountains: Mahogany Creek at entrance to National Forest, ca 7 air mi W of Driggs.-111.231543.67319201951Combination open slopes and coniferous forest dominated by shrubs and forbs, Douglas fir, and Prunus.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1659Stuart Markow1991628179U.S.A.IdahoBonnevilleTarghee National Forest: West Slope Snake River Range: trail along North Fork of Rainey Creek, ca 6 air mi NE of Swan Valley.-111.200843.517218291951Mostly riparian, dominated by Salix, Cornus, Prunus and Lonicera.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2035Stuart Markow199174185U.S.A.IdahoTetonTarghee National Forest: East Slope Big Hole Mountains: Superior Creek, ca 1.5 air mi SW of confluence with Horseshoe Creek; ca 11 air mi SW of Driggs.-111.373243.701919512012Valley bottom bordered by coniferous forest and creek, dominated by forbs, grasses and riparian vegetation.RMRM692414 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3445Stuart Markow1991720201U.S.A.WyomingTetonBridger-Teton National Forest: East Slope Snake River Range: Coburn Creek Trail, from Prichard Pass.-110.805843.327919201951Open coniferous forest with roadside weeds. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3606B. A. Packer T. McGowan1998625176U.S.A.WyomingConverseLaramie Range: along Indian Creek, ca 7 air mi NW of Esterbrook; ca 17 air mi SW of Douglas.-105.464442.482216761737Along creek bank. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3725B. A. Packer T. McGowan and T. Freeman199871182U.S.A.WyomingAlbanyLaramie Range: Medicine Bow National Forest: ca 2.5 air mi NE of Esterbrook, ca 33 air mi SE of Douglas.-105.312942.427518291981Along creek and boulder outcroppings. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3748B. A. Packer T. McGowan and T. Freeman199871182U.S.A.WyomingAlbanyLaramie Range: Medicine Bow National Forest: The Limestones, along Soldier Creek, ca 3 air mi SE of Esterbrook; ca 35 air mi SE of Douglas.-105.312942.398818291875Along creek. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5794Stuart Markow1991813225U.S.A.IdahoFremontTarghee National Forest: West Slope Teton Range: Porcupine Creek Campground and surrounding area.-111.224144.09316761737Coniferous forest dominated by Pinus contorta, with openings and adjacent roadside, and some riparian.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3897B. A. Packer T. McGowan and T. Freeman199873184U.S.A.WyomingAlbanyLaramie Range: along Laramie River and adjacent hills, ca 35 air mi NE of Rock River; ca 54 air mi NE of Laramie.-105.760942.108521342195Along the river. Phenology: spores.RMRM691604 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6586Stuart Markow1991823235U.S.A.WyomingTetonTarghee National Forest: West Slope Teton Range: Mesquite Creek Trail from Coal Creek/Mesquite Creek Divide to intersection with trail to Phillips Pass, ca 11 air mi NW of Jackson.-110.954243.547425602774Open slopes dominated by forbs and graminoids, with scattered patches of Pinus flexilis, Abies lasiocarpa, and Picea engelmannii.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8112Stuart Markow1992622174U.S.A.IdahoClarkTarghee National Forest: Western Centennial Mountains: above and W of Modoc Creek, leading to Paul Reservoir, 3 air mi S of National Forest boundary, ca 21 air mi NW of Dubois.-112.351444.467622862317Open slopes with mostly forbs and grasses.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8200Stuart Markow1992624176U.S.A.IdahoClarkTarghee National Forest: Centennial Mountains: west side of Beaver Creek near confluence with Stoddard Creek, ca 16 air mi N of Dubois.-112.210444.42461829Moist meadow dominated by forbs and grasses.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9221Stuart Markow1992713195U.S.A.IdahoFremontTarghee National Forest: Island Park Plateau: Island Park, along small creek ca 50 yds N of Buffalo River; ca 200 yds W of U.S. Hwy 20.-111.36744.42261920Riparian dominated by Salix and Carex.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9914Stuart Markow1992724206U.S.A.IdahoClarkTarghee National Forest: Western Centennial Mountains: Huntley Canyon, ca 5 air mi NW of Spencer.-112.26644.396921342195Plants in spring dominated by Carex and forbs.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4448Amy J. Roderick199866157U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: E of County Road 407, ca 3 air mi SE of Alcova.-106.708142.54031676Creek banks bordered by greasewood and rose thickets; disturbed. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun18569B. E. Nelson1990618169U.S.A.ColoradoRouttFlat Tops/White River Plateau: Williams Fork Mountains: Fish Creek Canyon, ca 19 air mi SW of Steamboat Springs.-107.138140.34922103Disturbed areas.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun791James P. Vanderhorst199077188U.S.A.ColoradoRio BlancoFlat Tops/White River Plateau: Lost Creek, ca 25 air mi E of Meeker.-107.455840.055223172560Meadows and sparse woods above creek, with Picea pungens, Pinus contorta, Populus tremuloides, Symphoricarpos, and Amelanchier.RMRM792993 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun37819B. E. Nelson Beth Ward199665157U.S.A.WyomingCarbonSouth-central Wyoming: The Sand Hills, ca 29.5 air mi SW of Rawlins; ca 25.5 air mi N of Baggs.21822195Low area among stabilized sand dunes. Phenology: spores.RMRM792992 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun38638B. E. Nelson1996714196U.S.A.WyomingCarbonSouth-central Wyoming: Sierra Madre: along Deep Gulch, North Fork Savery Creek, and Truckdrivers Creek below Sage Creek or County Road 401, ca 31.5 air mi S of Rawlins; ca 27 air mi NE of Baggs.22682378Stony stream bottom with patches of alder. Phenology: spores.RMRM792991 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun39033B. E. Nelson1996718200U.S.A.WyomingSweetwater[location and coordinates withheld]21342140Drier parts of the meadow below the springs. Phenology: vegetative only.RM792990 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun39851B. E. Nelson1996813226U.S.A.WyomingCarbonSouth-central Wyoming: Sierra Madre: along a small tributary of Savery Creek and Browns Hill or County Road 602, ca 2.3 air mi NW of Tullis; ca 36.5 air mi S of Rawlins; ca 21 air mi NE of Baggs.-107.336541.243422072256Meadow, willow thickets, and banks of a small stream. Phenology: spores.RMRM793274 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1464Beth Ward1996624176U.S.A.WyomingSweetwaterSouth-central Wyoming: Green River Basin: along the Big Sandy River near Gasson Bridge, ca 10 mi from the confluence of Big Sandy and Green rivers; ca 33 air mi NW of Rock Springs.19321949Creek terrace. Phenology: vegetative only.RMRM793275 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2268Beth Ward1996711193U.S.A.WyomingSweetwaterSouth-central Wyoming: Rock Springs Uplift: northern slopes and top at north end of Essex Mountain, ca 32 air mi NNE of Rock Springs.22312445Slump seep area. Phenology: spores.RMRM793276 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2431Beth Ward1996711193U.S.A.WyomingSweetwaterSouth-central Wyoming: spring and draw to Jack Morrow Creek, ca 1 air mi W of the Continental Divide; ca 2 air mi E of Monument Ridge; ca 0.5 mi S of the confluence of Blind Canyon and Jack Morrow Creek; ca 32.5 air mi NNE of Rock Springs.22502310Moist area adjacent to spring. Phenology: vegetative only.RMRM793277 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2519Beth Ward1996714196U.S.A.WyomingCarbonSouth-central Wyoming: Sierra Madre: southwestern lower slopes of Battle Mountain, ca 8 air mi E of confluence of Savery Creek and Little Snake River; ca 18.5 air mi E of Baggs.21822621Close proximity to spring. Phenology: vegetative only.RMRM793024 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2648Beth Ward1996714196U.S.A.WyomingCarbonSouth-central Wyoming: Sierra Madre: top and south slopes of Battle Mountain, ca 8 air mi E of confluence of Savery Creek and Little Snake River; ca 18.5 air mi E of Baggs.21032774Moist slope. Phenology: spores.RMRM793023 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2763Beth Ward1996718200U.S.A.WyomingCarbonSouth-central Wyoming: Bear Gulch drainage from unnamed, north/south oriented plateau, ca 1 air mi N of Cow Creek to The Sand Hills and Dry Cow Creek; ca 29 air mi SSW of Rawlins.22312346Spring area. Phenology: spores.RMRM793022 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3099Beth Ward1996721203U.S.A.WyomingCarbonSouth-central Wyoming: on east side of Atlantic Rim, ca 2 air mi SW of Bridger Pass; ca 20.5 air mi SSW of Rawlins.22832335Near water pool. Phenology: spores.RMRM792994 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3831Beth Ward1996818231U.S.A.WyomingCarbonSouth-central Wyoming: Sierra Madre: below Rendle Rim, ca 1 air mi SSW of Rendle Butte; ca 30.5 air mi SSW of Rawlins.22692402Spring fed stream. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6084Beth Ward1997624175U.S.A.WyomingSweetwaterSouth-Central Wyoming: Green River Basin: slopes of Simpson Gulch and Big Sandy River and river bottom area adjacent to Big Sandy River, ca 9 air mi SW of the confluence of Big Sandy River and Little Sandy Creek; ca 9.5 air mi SW of Farson.-109.58342.016119661998Adjacent to river, with Juncus. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7059Beth Ward1997725206U.S.A.WyomingSweetwaterSouth-Central Wyoming: slopes and draw bottom draining from Little Mountain SE to Red Creek, ca 0.5 air mi SE of U.S. Hwy 191; ca 4 air mi NW of Red Creek; ca 33 air mi S of Rock Springs.-109.244941.092822742349In draw bottom, with grass. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7111Beth Ward1997725206U.S.A.WyomingSweetwaterSouth-Central Wyoming: creek bottom and adjacent west-facing hillside of creek flowing northward into Little Red Creek, ca 4 air mi W of Pine Mountain; ca 1.5 air mi N of Tepee Mountains; ca 38 air mi SSE of Rock Springs.-109.09241.020723042371Creek bottom, open sun. Phenology: spores.RMRM960633 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun783Roger L. Williams1989617168U.S.A.ColoradoLarimerFront Range: Miller Fork, ca 2.5 air mi N of Glen Haven; ca 8.5 air mi NE of Estes Park.-105.454340.4882347Wet streambank with Equisetum arvense. Few plants. Phenology: spores.RMRM960634 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun887Roger L. Williams199069160U.S.A.WyomingCarbonSierra Madre: North Fork Miner Creek, ca 4.5 air mi SW of Encampment.-106.833841.14972378Dry gravel slide on old mine hole. Few plants. Phenology: spores.RMRM960635 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun911Roger L. Williams1990714195U.S.A.WyomingCarbonSierra Madre: Holroyd Park, ca 17 air mi SE of Encampment.-106.544641.03382439Streambank. Few plants. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4627Amy J. Roderick199867158U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Canyon Creek E of Kortes or County Road 291, ca 11.2 air mi S of Alcova townsite.-106.734442.39751975Creek banks and adjacent wet meadow; grazing disturbance. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun949Jean Wood199567158U.S.A.WashingtonStevensWestern Colville National Forest and Vicinity: Colville River mouth, ca 2 air mi SW of Kettle Falls along north shore of the bay.-118.092748.5761426Riverside wetland; ponderosa pine/pinegrass; slopes and benches. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4280Jean Wood1996527148U.S.A.WashingtonStevensWestern Colville National Forest and Vicinity: "Pine savannah" at intersection of Narcisse Road and Bear Creek Road on Little Pend Oreille Wildlife Refuge.-117.724848.4748701Open ponderosa pine forest with pinegrass; small creek with aspen and birch. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5541Jean Wood1996630182U.S.A.WashingtonFerryWestern Colville National Forest and Vicinity: White Creek above Kettle River, ca 2.5 air mi NE of Curlew.-118.53748.9219762823Old roads in mixed forest. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7663Jean Wood K. Ahlenslager, L. Swartz and J. Nisbet1996813226U.S.A.WashingtonFerryWestern Colville National Forest and Vicinity: Deadman Creek Road, ca 2 mi W of Boyds.-118.164748.7072487670Roadside. Phenology: spores.RMRM1014640 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun23406B. E. Nelson Russ Nelson1992716198U.S.A.WyomingSubletteWyoming/Salt River Ranges: Wyoming Range: north side of Beaver Ridge, ca 24 air mi NW of Pinedale.-110.300642.989223782408Aspen woods. Phenology: vegetative only.RMRM1014639 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun23475B. E. Nelson Russ Nelson1992716198U.S.A.WyomingSublette[location and coordinates withheld]2347Wetter areas of meadow mown for hay. Phenology: spores.RMRM1014638 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun23578B. E. Nelson Russ Nelson1992718200U.S.A.WyomingLincolnWyoming/Salt River Ranges: Salt River Range: along Murphy Creek just above Murphy Lakes, ca 23.5 air mi NNE of Afton.-110.864443.06142012Sandy, rocky draw on steep slope. Phenology: spores.RMRM1014637 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun23704B. E. Nelson Russ Nelson1992720202U.S.A.WyomingLincoln[location and coordinates withheld]1920Roadside. Phenology: vegetative only.RMRM1014641 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1119Bruce Embury1992612164U.S.A.WyomingLincolnWyoming/Salt River Ranges: Wyoming Range: Stump Lake, ca 12 air mi SE of Alpine Junction.-110.82543.069220362109Spruce-fir forest surrounding lake and stream. Phenology: spores.RMRM1014636 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32187Ronald L. Hartman Bruce Embury1992511132U.S.A.WyomingLincolnWyoming/Salt River Ranges: Gannett Hills : 0.5-1 air mi E of Idaho; 13 air mi N of Border Junction.-111.021442.400619142222South exposure, steep rocky slopes and grassy or sagebrush ridge and wet roadside below. Phenology: spores.RMRM1014635 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32850Ronald L. Hartman Bruce Embury1992621173U.S.A.WyomingLincolnWyoming/Salt River Ranges: Gannett Hills: Spring Creek E to ridge; ca 10 air mi SSW of Afton.-111.023942.613620242399Sagebrush/grassy slopes with scattered Douglas fir, aspen, chokecherry, rabbitbrush, coralberry, and antelope bitterbrush. Phenology: spores.RMRM1014634 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun35080Ronald L. Hartman1992728210U.S.A.WyomingSubletteWyoming/Salt River Ranges: Wyoming Range: headwaters of Fisherman Creek; 11 air mi SE of Bondurant.-110.233943.144722432277Willow thickets along stream and lower slopes with lodgepole pine. Phenology: spores.RMRM1014633 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun36474Ronald L. Hartman1992821234U.S.A.WyomingLincoln[location and coordinates withheld]1737Streamside and adjacent uplands. Phenology: spores.RMRM1014632 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun36900Ronald L. Hartman1992824237U.S.A.WyomingSubletteWyoming/Salt River Ranges: Wyoming Range: Straight Creek just S and a little E of Mount Schidler; ca 2-2.5 air mi NE of Middle Piney Lake.-110.521942.629425302560Stream side and banks. Phenology: spores.RMRM9883 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10013B. E. Nelson1983627178U.S.A.WyomingHot SpringsBighorn Basin: along Left Hand Creek, ca 3 air mi SW of Dickie (LU Ranch); ca 38 air mi NW of Thermopolis.-108.799443.98391829Creek bottom.RMRM932179 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10571B. E. Nelson1983731212U.S.A.WyomingHot SpringsBighorn Basin: along Gooseberry Creek, ca 1 mi W of Wyo Hwy 120; ca 3.5 air mi E of Dickie (LU Ranch); ca 34.5 air mi NW of Thermopolis.-108.679443.99921676Grassy creek bottom.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10648B. E. Nelson1983731212U.S.A.WyomingParkBighorn Basin: along Gooseberry Creek, ca 10.5 air mi SSE of Meeteetse.-108.8005644.013061829Creek bottom.RMRM932178 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10703B. E. Nelson198382214U.S.A.WyomingHot SpringsBighorn Basin: along Grass Creek, ca 4.5 air mi WSW of Grass Creek (town); ca 33 air mi NW of Thermopolis.-108.739443.925281829Flats along the creek.RMRM932177 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11398B. E. Nelson198475187U.S.A.WyomingHot SpringsBighorn Basin: along Cottonwood Creek, ca 7 air mi E of Squaw Teat Butte; ca 33 air mi WNW of Thermopolis.-108.842743.76692042Sand-rock bars.RMRM919475 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11455B. E. Nelson1984722204U.S.A.WyomingCarbonMedicine Bow Mountains: along Douglas Creek, ca 9 air mi W of Foxpark, ca 25.5 air mi ESE of Encampment.-106.332241.09472469Meadow along small stream. Phenology: spores.RMRM919472 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun12258B. E. Nelson1985630181U.S.A.WyomingCarbonMedicine Bow Mountains: along Douglass Creek ca 6 air mi above (ESE) the North Platte River, ca 25.5 air mi ESE of Encampment.-106.332241.080624392500Low bench along creek with scattered lodgepole pine. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4828Amy J. Roderick1998611162U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: North Platte River S of County Road 408, ca 0.3 air mi E of Pathfinder Dam; ca 9 air mi SW of Alcova townsite.-106.845742.46751737River banks and adjacent granite rocks; Rhus toxicodendron abundant. Phenology: spores.RMRM535206 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun12365B. E. Nelson1985712193U.S.A.WyomingParkNorthern Absarokas: Crandall Ranger Station off Wyo Hwy 296, ca 36 air mi NW of Cody.-109.633944.848331968Ridge with scattered sagebrush, with scattered aspen on lower edge. Phenology: spores.RMRM932176 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun14060B. E. Nelson1987629180U.S.A.WyomingParkBighorn Basin: University of Wyoming Agricultural Experiment Station, ca 1.5 mi N of Powell on Wyo Hwy 295.-108.743344.77441341Irrigation canal bank.RMRM932175 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun14179B. E. Nelson1987630181U.S.A.WyomingBig HornBighorn Basin: along Whistle Creek, ca 6 air mi SW of Byron, ca 12 air mi SW of Lovell.-108.5838944.716111280Wooded stream bottom.RMRM932174 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun14934B. E. Nelson Erik Nelson1988529150U.S.A.WyomingBig HornBighorn Basin: along and above St. Joe Canal off Dorsey Creek Road, ca 18 air mi W of Basin, ca 5 air mi SSE of Burlington.-108.4013944.377784400Canal banks.RMRM932173 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun15641B. E. Nelson Erik Nelson198869161U.S.A.WyomingParkBighorn Basin: along Line Creek, ca 7 air mi NW of Clark, ca 30 air mi NW of Powell.-109.2727844.995281707Sagebrush bench above creek.RMRM600072 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun17161B. E. Nelson Jan Pollet1989718199U.S.A.WyomingPlatteLaramie Mountains: Cottonwood Creek above the falls, ca 23 air mi NW of Wheatland; ca 11 air mi ENE of Laramie Peak.-105.253942.31281676Edge of stream. Phenology: spores.RMRM600071 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun17286B. E. Nelson Jan Pollet1989719200U.S.A.WyomingPlatte[location and coordinates withheld]1463Bench above river. Phenology: vegetative only.RMRM600070 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun17345B. E. Nelson Jan Pollet1989719200U.S.A.WyomingPlatte[location and coordinates withheld]14321445Floodplains. Phenology: spores.RMRM583811 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun20233B. E. Nelson1990825237U.S.A.WyomingTetonWest Slope Wind River Range: along Purdy Creek NE of South Fork Fish Creek, ca 31.5-32 air mi ENE of Jackson.-110.140843.57312378Moist meadow in creek bottom. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun21834B. E. Nelson1991726207U.S.A.WyomingFremontOwl Creek/Bridger Mountains: Bridger Mountains: along East Fork Dry Creek at the abondoned Berger Ranch, ca 12 air mi NW of Lysite, ca 37 air mi NE of Riverton.-107.863343.39361814Abandoned hay field.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun22012B. E. Nelson199184216U.S.A.WyomingHot SpringsOwl Creek/Bridger Mountains: Bridger Mountains: along Ackles Fork ca 1.5 mi above confluence with East Kirby Creek, ca 20 air mi ESE of Thermopolis.-107.827543.56611646Clay soil in wet creek bottom.RMRM349141 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3183B. E. Nelson197978189U.S.A.WyomingSheridanBig Horn Mountains: in Wolf Creek Canyon above Wolf Post Office (Eaton Ranch), ca 8 air mi S of Dayton, ca 15.5 air mi W of Sheridan.-107.2666744.770281524By the creek. Phenology: spores.RMRM349136 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5198B. E. Nelson198066158U.S.A.WyomingWashakieBig Horn Mountains: near the mouth of Tensleep Canyon, ca 5 air mi NE of Ten Sleep.-107.3586144.070281493Brushy bottom of canyon and along the creek. Phenology: spores.RMRM349138 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6727B. E. Nelson1980720202U.S.A.WyomingJohnsonBig Horn Mountains: along Clear Creek just off U.S. Hwy 16, ca 5.3 air mi WSW of Buffalo.-106.8113944.33141676Dry, stony canyon bottom. Phenology: spores.RMRM349137 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7153B. E. Nelson Gael Fonken1980814227U.S.A.WyomingWashakieBig Horn Mountains: near the mouth of Tensleep Canyon, ca 5 air mi NE of Ten Sleep.-107.3586144.070281463In and around overflow areas. Phenology: vegetative only.RMRM932180 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9883B. E. Nelson Robert S. Kirkpatrick1983623174U.S.A.WyomingHot SpringsBighorn Basin: along Cottonwood Creek, ca 5 air mi W of Hamilton Dome; ca 24.5 air mi WNW of Thermopolis.-108.662243.76641890Stream bottom.RMRM384834 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1305Gael Fonken Ronald L. Hartman1981626177U.S.A.WyomingNatronaWind River Basin: Rattlesnake Mountains: Garfield Peak and northeast slope.-107.272542.788921342513Sandstones, shales, and limestone on lower slopes with granite above, streambanks, open slopes, and limber pine woodlands. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4153June Haines1985613164U.S.A.WyomingFremontHaines' Farm, ca 9 mi W of Riverton on U.S. Hwy 26.-108.527743.09161639Irrigation canal bank, at edge of water.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4690aJune Haines Georgia Haines and Nora Little198574185U.S.A.WyomingFremontBig Camp Creek Area, ca 6 air mi WSW of Muddy Gap Junction (Three Forks).-107.532742.339720732134Moist stream banks.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5090June Haines Georgia Haines1985727208U.S.A.WyomingFremontSoutheast edge of Trail Lake at inlet of Torrey Creek, ca 8.2 air mi SSE of Dubois; ca 6.9 mi S on Trail Lake Road.-109.545843.43452256Wet creek banks.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5285June Haines Georgia Haines198584216U.S.A.WyomingFremontGreen Mountain Park, West Fork Middle Cottonwood Creek, ca 9.5 air mi SSE of Jeffrey City.-107.727442.38323782500Creek banks and wet meadows.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5385June Haines198587219U.S.A.WyomingFremontGranite Mountain Uplift: Sweetwater River, ca 3 air mi NE of Jeffrey City.-107.7890842.5263518991932Meadow north of river.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6715June Haines Georgia Haines1986621172U.S.A.WyomingNatronaSweetwater Rocks: Savage Pocket, ca 13 air mi NE of Muddy Gap Junction.-107.258542.48218652073Wet rush-sedge meadow adjacent to creek.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10442Heather Bradtke200285217U.S.A.OregonGrantUmatilla National Forest and Vicinity: North Fork John Day Wilderness: from China Meadows to middle of Packsaddle Trail, ca 7 mi N and 5 mi W of Granite.-118.50544.91777816151890Slope 0-15; aspect southeast. Phenology: spores.RMRM396964 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11743Keith H. Dueholm1981710191U.S.A.WyomingSweetwaterRock Springs Uplift: southwest base of Miller Mountain.-109.168341.15142256Seepage areas with sedge meadows, sagebrush slopes; meadow. Phenology: vegetative only.RMRM524478 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11769Keith H. Dueholm1981719200U.S.A.WyomingCampbellPowder River Basin: ca 18 air mi SE of Reno Junction.-105.2543.55691463Streambed with standing water, slopes of deep cut gully, margins of dried holding pond, upland terraces; gully. Phenology: spores.RMRM321878 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1520Keith H. Dueholm Ronald L. Hartman1978527147U.S.A.WyomingCampbell[location and coordinates withheld]1463Dissected plains along permanent stream; lower slope, near stream. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10684Heather Bradtke2002812224U.S.A.OregonGrantUmatilla National Forest and Vicinity: Granite Creek near mouth of Lick Creek, ca 2 mi N and 5 mi W of Granite.-118.517544.8463891341Weedy creek bank; slope 0. Phenology: spores.RMRM321881 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1633Keith H. Dueholm Ronald L. Hartman1978529149U.S.A.WyomingCampbellPowder River Basin: along Mud Spring Creek, ca 5 air mi SE of Savageton.-105.699243.82781524Rolling plains; near creek. Phenology: spores.RMRM321886 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1643Keith H. Dueholm Ronald L. Hartman1978529149U.S.A.WyomingCampbell[location and coordinates withheld]1524Along creek and on adjacent plains; near edge of pond, behind holding dam. Phenology: vegetative only.RMRM321891 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2151Keith H. Dueholm Ronald L. Hartman1978610161U.S.A.WyomingCampbell[location and coordinates withheld]1432Rocky slopes, stream margins, ponderosa pine woodland, juniper slopes; slope near stream. Phenology: spores.RMRM321888 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2735Keith H. Dueholm1978625176U.S.A.WyomingCampbell[location and coordinates withheld]1463Plains, creek, and roadside; streambank. Phenology: spores.RMRM321887 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2808Keith H. Dueholm1978625176U.S.A.WyomingCampbell[location and coordinates withheld]1432Flats along creek, old streambed, and standing water; flats. Phenology: spores.RMRM321883 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2946Keith H. Dueholm1978626177U.S.A.WyomingCampbell[location and coordinates withheld]1128Thermal creek, adjacent plains; plains. Phenology: spores.RMRM321889 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3285Keith H. Dueholm Mary Alice Sanguinetti197875186U.S.A.WyomingConverse[location and coordinates withheld]1432Flats and stream outlet; muddy streambank. Phenology: spores.RMRM321885 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3486Keith H. Dueholm Mary Alice Sanguinetti197877188U.S.A.WyomingCampbell[location and coordinates withheld]1189Streambank, shaded ravine, gravel slope, highway right-of-way; near stream. Phenology: spores.RMRM321882 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5948Keith H. Dueholm1978811223U.S.A.WyomingSheridan[location and coordinates withheld]1250Grassy flats along streambed. Phenology: vegetative only.RMRM332246 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6414Keith H. Dueholm197963154U.S.A.WyomingSheridan[location and coordinates withheld]1219Ditch between highway and creek; roadside. Phenology: spores.RMRM332245 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7018Keith H. Dueholm1979618169U.S.A.WyomingNiobrara[location and coordinates withheld]1341Sandy flats above creek, rich, moist meadows along creek, sandy plains; flats. Phenology: vegetative only.RMRM332251 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7579Keith H. Dueholm1979630181U.S.A.WyomingJohnson[location and coordinates withheld]1524Rich hillsides above creek, aspen thickets along creek bottom, sedge meadows in wet areas; hillside. Phenology: spores.RMRM332250 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7990Keith H. Dueholm1979711192U.S.A.WyomingNiobrara[location and coordinates withheld]1402Large seepage area along small creek below holding dam, sagebrush plains; edge of seepage area. Phenology: spores.RMRM332247 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8094Keith H. Dueholm1979712193U.S.A.WyomingJohnson[location and coordinates withheld]1432Sagebrush plains, wet draw, hills with clinker outcrops; bottom of draw. Phenology: spores.RMRM332252 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8416Keith H. Dueholm1979721202U.S.A.WyomingJohnson[location and coordinates withheld]1402Sandy flats along lake, edges and meadows along creek; meadows. Phenology: spores.RMRM332249 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8878Keith H. Dueholm197989221U.S.A.WyomingSheridanPowder River Basin: along U.S. Hwy 87, ca 2 road mi NW of Ranchester.-107.224244.92941463Wet ditches, meadows along small stream, tall grass prairie of big bluestem and slough grass, between railroad and wet ditch; prairie. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5125Amy J. Roderick1998616167U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Cherry Creek, ca 5.2 air mi S of Wyo Hwy 220; ca 13.6 air mi SW of Independence Rock.-107.299142.33972042Aspen grove near stream. Phenology: spores.RMRM554922 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3142Robert S. Kirkpatrick1984629181U.S.A.WyomingParkAbsaroka Mountains: ca 16 air mi SW of Meeteetse, upper end of the North Fork of Dick Creek, ca 5 mi from the Wood River.-109.103244.013323172408Riparian, lower Montane, with Salix; moist banks and slopes. Phenology: vegetative only.RMRM554921 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4982Robert S. Kirkpatrick1984726208U.S.A.WyomingParkAbsaroka Mountains: ca 22 air mi SW of Meeteetse, in the vicinity and west of the junction of the Middle Fork of the Wood River and Beaver Creek.-109.183443.909822862530Riparian, montane; wet, marshy areas. Phenology: spores.RMRM332248 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10405Ronald L. Hartman B. E. Nelson197981213U.S.A.WyomingNatronaWind River Basin: ca 6 air mi NNE of Arminto.-107.227543.26361920Chugwater red beds topped by limestone. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5641Heather Bradtke2002614165U.S.A.OregonMorrowUmatilla National Forest and Vicinity: Sunflower Flats on Forest Road 22, ca 25 mi S of Heppner.-119.56658345.0042221271In open meadow with fine, deep, chocolate brown soil over basalt; slope 0; aspect none. Phenology: vegetative only.RMRM930629 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10914Ronald L. Hartman Keith H. Dueholm1980522143U.S.A.WyomingWashakieBighorn Basin: Spring Creek Road 2.3 mi E of junction with Wyo Hwy 434.-107.3363943.9392Moist area along stream. No elevation listed in field book.RMRM932213 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11112Ronald L. Hartman Keith H. Dueholm1980524145U.S.A.WyomingBig HornBighorn Basin: Wyo Hwy 30, ca 2.2 air mi SSE of Burlington.-108.4216744.421391310Roadside in farmland with irrigation ditch and planted trees. No elevation listed in field notebook.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11340Ronald L. Hartman Keith H. Dueholm1980528149U.S.A.WyomingBig HornBighorn Basin: U.S. 14: ca 0.5 mi E of Greybull.-108.0433344.49751189Sandstone outcrops and sandy plains.RMRM932164 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun12757Ronald L. Hartman Keith H. Dueholm1981527147U.S.A.WyomingHot SpringsBighorn Basin: intersection of Wyo Hwy 431 and Gooseberry Creek, ca 26 air mi W of Worland.-108.517843.9983Greasewood flats and banks of creek at highway crossing.RMRM384831 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun13051Ronald L. Hartman Gael Fonken1981626177U.S.A.WyomingNatronaRattlesnake Mountains: Garfield Peak and northeast slope.-107.272542.788921342513Sandstones, shales, and limestone on lower slopes with granite above; streambanks, open slopes, and limber pine woodlands. Phenology: vegetative only.RMRM339863 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun14035Ronald L. Hartman1982719200U.S.A.WyomingFremontIce Slough, ca 9 air mi WNW of Jeffrey City.-107.981442.53031966Marsh with very boggy peat deposits and adjacent margins. Phenology: spores.RMRM554920 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun19650Ronald L. Hartman1984827240U.S.A.WyomingParkSoutheastern Absarokas: South Fork Shoshone River Trail, between Younts and Marston creeks.-109.7213943.952823172378Wet meadows and coniferous forests. Phenology: vegetative only.RMRM384832 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun20366Ronald L. Hartman June Haines198562153U.S.A.WyomingNatronaWind River Basin: Sentinel Rocks, 2.5 air mi SE of Independence Rock.-107.118642.483918902195Sandy sagebrush covered plains, granite mountains with massive boulders and moist seeps, aspen woodlands in drainages; granite mountains and drainages. Phenology: spores.RMRM384833 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun20482Ronald L. Hartman198563154U.S.A.WyomingFremontWind River Basin: Crooks Gap Road, ca 6.5 air mi S of Jeffrey City.-107.841742.39891981Sagebrush flats and stream margin. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5251Amy J. Roderick1998621172U.S.A.WyomingFremontUpper North Platte and Laramie River Drainages: Granite Mountains: Lankin Gap between Lankin Dome and McIntosh Peak, ca 3 air mi NW of Split Rock.-107.553442.51121966Sagebrush-grassland; sandy. Phenology: spores.RMRM583814 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun27174Ronald L. Hartman1990712193U.S.A.WyomingTetonWest Slope Wind River Range: Fish Creek/Moccasin Basin Area, Harness Gulch from North Fork Fish Creek to upper watershed. AlsoS14, 15.-110.120843.602223782621Sagebrush grasslands. Phenology: spores.RMRM583813 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun27569Ronald L. Hartman1990718199U.S.A.WyomingSubletteWest Slope Wind River Range: Jim Creek, 1.5 air mi E of Wyo Hwy 352.25452606Streamside with scattered Engelmann spruce; lodgepole pine forest and meadows slightly above. Phenology: spores.RMRM583812 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun28322Ronald L. Hartman1990825237U.S.A.WyomingTetonWest Slope Wind River Range: South Fork Fish Creek between Purdy and Hackamore Creeks.-110.120843.573123622378Meadows, gravel bars, and adjacent lodgepole pine forests. Phenology: spores.RMRM595164 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun33810Ronald L. Hartman199279191U.S.A.WyomingAlbanyLaramie Plains: Meeboer Lake, ca 15 air mi SE of Laramie.-105.813541.21052225In seep area above dark green bands of Juncus and near spring; forming a nearly continuous band along northwest side. Associates include Deschampsia cespitosa, Crepis runciniata, Senecio debilis, Platanthera hyperborea and Cicuta maculata. Phenology: spores.RMRM321892 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5542Ronald L. Hartman Keith Dueholm1978526146U.S.A.WyomingCampbellPowder River Basin: ca 2.3 mi S of Montana.-105.1977844.97531158Pond and valley to the east; open slope. Phenology: spores.RMRM321880 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5664Ronald L. Hartman Keith Dueholm1978528148U.S.A.WyomingCampbellPowder River Basin: Pumpkin Buttes: North Butte.-105.955343.80061844Plains and foothills, steep eroded west slopes with limber pine, caprock, and flat to gently rolling plains on top; upper sandy slopes. Phenology: spores.RMRM321884 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5889Ronald L. Hartman Keith Dueholm197863154U.S.A.WyomingCampbellPowder River Basin: ca 14.5 air mi SSE of Reno Junction.-105.331743.57111463Gently sloping plains with moist sedge flats. Phenology: spores.RMRM321879 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6251Ronald L. Hartman Keith Dueholm197867158U.S.A.WyomingCampbellPowder River Basin: 3 mi N of Four Corners.-105.5422244.836111189Stream margin. Phenology: spores.RMRM321877 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6528Ronald L. Hartman Keith Dueholm1978610161U.S.A.WyomingCampbellPowder River Basin: along Porcupine Creek, ca 15 air mi SSE of Reno Junction.-105.331743.58561432Margins and adjacent sandy flats. Phenology: spores.RMRM349140 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9317Ronald L. Hartman Ann Odasz1979625176U.S.A.WyomingSheridanBig Horn Mountains: Little Bighorn River Canyon, ca 17 air mi W of Parkman.-107.673644.975816461829Grassy slopes and limestone outcrops. Phenology: spores.RMRM349139 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9704Ronald L. Hartman1979628179U.S.A.WyomingJohnsonBig Horn Mountains: North Fork Crazy Woman Creek, ca 13 air mi SW of Buffalo.-106.831444.201112073Limestone outcrops and rocky slopes, shaded stream side, and aspen woodlands with adjacent meadows; aspen woodland and adjacent meadow. Phenology: spores.RMRM583821 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1944Walter Fertig1990617168U.S.A.WyomingSubletteWest Slope Wind River Range: north shore of Upper Green River Lake, ca 26.5 air mi N of Pinedale.-109.819243.270824292451Open canopy lakeshore with sandy soil. Phenology: spores.RMRM583820 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2425Walter Fertig1990625176U.S.A.WyomingSubletteWest Slope Wind River Range: Kendall Warm Springs, adjacent to Green River Road, ca 29 air mi NNW of Pinedale.-110.013143.282823782402Open bank of warm springs. Phenology: spores.RMRM583819 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2490Walter Fertig1990625176U.S.A.WyomingSubletteWest Slope Wind River Range: Half Moon Lake, ca 8 air mi NE of Pinedale.-109.750642.931423472408Shady aspen woods. Phenology: spores.RMRM583818 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3153Walter Fertig199076187U.S.A.WyomingTetonWest Slope Wind River Range: beaver pond adjacent to ford of Cottonwood Creek, ca 25 air mi E of Jackson.-110.2643.55892286Wet, open margins of pond. Phenology: spores.RMRM583817 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3872Walter Fertig1990714195U.S.A.WyomingSubletteWest Slope Wind River Range: Mill Creek, ca 0.5 mi NE of north shore of Lower Green River Lake.-109.837843.31362500Open, wet, marshy bank of creek. Phenology: spores.RMRM583816 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4673Walter Fertig1990728209U.S.A.WyomingSubletteWest Slope Wind River Range: Kendall Warm Springs and bank of Green River adjacent to Warm Springs Falls, ca 30 air mi NNW of Pinedale.-110.021943.28062378Wet bank of Green River. Phenology: spores.RMRM583815 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4808aWalter Fertig1990728209U.S.A.WyomingSubletteWest Slope Wind River Range: Lime Creek, ca 30 air mi NNW of Pinedale.-110.013143.282823752585Grassy banks at confluence of Lime Creek and the Green River. Phenology: spores.RMRM583121 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8067Walter Fertig1991618169U.S.A.WyomingSubletteWest Slope Wind River Range: Pole Creek drainage and adjacent ridges, between Fayette Lake and Half Moon Lake, ca 9 air mi NE of Pinedale.-109.691142.945623172743Open, grassy bank of small beaver pond S of Grouse Lake. Phenology: spores.RMRM600069 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun25635B. E. Nelson1993613164U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along Horse Creek and adjacent plains W of County Road 191, ca 4 air mi S of La Grange; ca 34 air mi S of Torrington.-104.140841.570814201457Meadows in the stream bottom. Phenology: spores.RMRM600068 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun27523B. E. Nelson1993726207U.S.A.WyomingPlatteSouthern Powder River Basin/Southeastern Plains: Hartville Uplift: along Patten Creek ca 0.5 mi W of Wyo Hwy 270 on Patten Creek or County Road 208, ca 16 air mi ESE of Glendo; ca 12.3 air mi N of Guernsey.-104.740842.442815301536Moist to wet meadows in creek bottom. Phenology: vegetative only.RMRM600067 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun27610B. E. Nelson1993726207U.S.A.WyomingPlatteSouthern Powder River Basin/Southeastern Plains: Hartville Uplift: along North Platte River ca 0.6-0.8 air mi SE of Guernsey Dam, ca 1 air mi NW of Guernsey.-104.763342.28513231341Thickets on steep rocky slopes on the river bank. Phenology: vegetative only.RMRM600066 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun27941B. E. Nelson1993730211U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Dry Creek ca 0.5 mi above and N of Lightning Creek, ca 0.5 air mi W of Niobrara County on Walker Creek or County Road 43, ca 29.5 air mi NE of Douglas.-104.904243.17111310Sagebrush-greasewood flats above the creek. Phenology: vegetative only.RMRM600065 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun27996B. E. Nelson1993730211U.S.A.WyomingNiobraraSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Deep Creek on Field or County Road 50 SE of Cow Creek Buttes, ca 17 air mi NW of Lance Creek, ca 30.5 air mi NW of Lusk.-104.890843.2113411356Sand bars, flats, and low benches along stream channel. Phenology: vegetative only.RMRM600064 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun28196B. E. Nelson199383215U.S.A.WyomingNiobrara[location and coordinates withheld]14481454Moist to wet meadows along the river. Phenology: spores.RMRM600063 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun28462B. E. Nelson1993817229U.S.A.WyomingLaramie[location and coordinates withheld]17831829Benches and flats along the creek with patches of Symphoricarpos. Phenology: vegetative only.RMRM600062 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun28535B. E. Nelson1993817229U.S.A.WyomingLaramieSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along Bear Creek on Marsh or County Road 245-1, ca 3/4 mi W of (upside down V)X Ranch, ca 25.5 air mi ENE of Iron Mountain (Farthing); ca 35 air mi N of Cheyenne.-104.7451941.6337816461670Drier cobblestone gravel bars. Phenology: vegetative only.RMRM600061 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun28610B. E. Nelson1993817229U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along Bear Creek ca 1/4 mi above Little Bear Creek on County Road 153, ca 14.3 air mi SE of Chugwater; ca 38.5 air mi SW of Torrington.-104.618641.616615731579Meadows and low benches along the stream. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5468Amy J. Roderick1998623174U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: Rattlesnake Hills: Burnt Wagon Draw, ca 6.5 air mi S of Poison Spider or County Road 210; ca 31.2 air mi SW of Casper.-106.94442.72971981Willow thicket and marsh surrounding drainage. Phenology: spores.RMRM60060 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun29311B. E. Nelson1993826238U.S.A.WyomingConverse[location and coordinates withheld]1554Thickets in the stream bottom. Phenology: vegetative only.RMRM600059 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun29341B. E. Nelson1993826238U.S.A.WyomingConverse[location and coordinates withheld]1503Open Salix exigua stands. Phenology: vegetative only.RMRM600058 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun29947B. E. Nelson1993929272U.S.A.WyomingNiobrara[location and coordinates withheld]1256Meadows and low flats in the creek bottom. Phenology: vegetative only.RMRM600057 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun30019B. E. Nelson1993101274U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along the North Platte River above Glendo Reservoir, ca 5.3 air mi SE of Orin; ca 18.3 air mi SE of Douglas.-105.098142.613614111414River bank. Phenology: vegetative only.RMRM704243 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun30588B. E. Nelson1994523143U.S.A.WyomingNatronaSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Okie Draw and a tributary NW of Notches Dome, ca 12 air mi NE of Waltman; ca 44.5 air mi NW of Casper.-107.05543.207617921817Benches along the stream channel. Phenology: spores.RMRM704242 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun31560B. E. Nelson1994615166U.S.A.WyomingLaramieSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along Horse Creek and bluffs to the north, ca 4.5 air mi S of Indian Hill, ca 24.5 air mi N of Cheyenne.-104.751241.472617341768Benches, streambank, and old sandbars. Phenology: spores.RMRM704241 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun31889B. E. Nelson1994621172U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Cow Creek and the north end of Cow Creek Buttes, ca 15 air mi ENE of Bill; ca 43 air mi NE of Douglas.-104.970843.312613811384Low benches and old stream bars. Phenology: vegetative only.RMRM704240 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32211B. E. Nelson1994627178U.S.A.WyomingNatronaSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along McKenzie Draw and vicinity just above Sand Spring Creek on Ormsby or County Road 705, ca 14 air mi NNE of Casper.-106.214643.033516611667Meadows in the drainage channel. Phenology: spores.RMRM704239 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32679B. E. Nelson1994711192U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Hartville Uplift: along a draw leading into Rawhide Creek ca 1 mi W of Middle Rawhide Butte, ca 11 air mi NW of Jay Em; ca 38.5 air mi NW of Torrington.-104.522442.569915391573Moist to dry flats above the wash. Phenology: spores.RMRM704238 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32788B. E. Nelson1994713194U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: upper Gillam Draw on the west side of Pine Ridge, ca 53 air mi NW of Douglas; ca 11.5 air mi SW of Ross.-106.065543.33616761695Silt at the base of bluffs along the drainage channel. Phenology: vegetative only.RMRM704237 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun32975B. E. Nelson1994718199U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along Lost Creek at U.S. Hwy 18-20 just ESE of Lost Springs, ca 23 air mi E of Douglas.-104.921242.76181487Stream bottom with willows. Phenology: spores.RMRM704236 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun33093B. E. Nelson David Reilly and Jim Cahill1994720201U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: S of the Laramie River along the north side of the Fort Laramie Canal, ca 2 air mi SW of Fort Laramie (town); ca 21 air mi NW of Torrington.-104.551642.196112921298Seep area along small drainage. Phenology: vegetative only.RMRM704235 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun33314B. E. Nelson Tim Chumley and Robbin Romberg199482214U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along Bear Creek ca 0.5 mi above the mouth of Spring Run, ca 17.7 air mi W of LaGrange, ca 34.5 air mi SSW of Torrington.-104.503941.61971518Steep banks at the edge of the creek and sand bars. Phenology: vegetative only.RMRM704234 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun34163B. E. Nelson1994821233U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Ross or County Road 31 between Dry Fork Cheyenne River and Cheyenne River Draw and along Cheyenne River Draw, ca 36 air mi NNW of Douglas.-105.689543.221815731588Meadows and grassy channel in the draw. Phenology: vegetative only.RMRM704246 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun34212B. E. Nelson1994821233U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Antelope Creek and Ross or County Road 31, ca 31 air mi WNW of Bill, ca 50.5 air mi NNW of Douglas, ca 3.5 air mi SE of Ross.-105.82843.421615571573Moist meadows in the valley bottom. Phenology: vegetative only.RMRM601008 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5969Robert D. Dorn199568159U.S.A.WyomingBig Horn1.5 mi E of Lucerne.-108.146943.73941310Roadside ditch with Poa and Bromus. Phenology: spores.RMRM600488 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6607Robert D. Dorn199592245U.S.A.WyomingUintaBear River at Evanston.-110.936841.26462073Riverbank with E. arvense and E. variegatum. Phenology: spores.RMRM600055 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun39945Ronald L. Hartman199374185U.S.A.WyomingPlatte[location and coordinates withheld]1493Calcareous slopes and sandy flats. Phenology: spores.RMRM600054 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun40106Ronald L. Hartman199374185U.S.A.WyomingConverse[location and coordinates withheld]1432Sandy soil along river and railroad. Phenology: spores.RMRM600053 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun40272Ronald L. Hartman T. W. Nelson199376187U.S.A.WyomingNatronaSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 1.2 air mi NNW of Waltman.-107.213343.09081899Sandy draw and slopes. Phenology: spores.RMRM600052 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun41345Ronald L. Hartman1993713194U.S.A.WyomingPlatteSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 12 air mi SW of Wheatland.-105.164741.99691554Stream side. Phenology: spores.RMRM642611 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun45065Ronald L. Hartman Tom Cramer and Charmaine Refsdal1994522142U.S.A.WyomingSweetwaterGreen River Basin: area along Big Sandy River from gaging station, ca 1 air mi to the east; ca 10 air mi SW of Farson.-109.560842.014419511981Disturbed and bottom areas along river, slopes with sagebrush and rabbitbrush. Phenology: spores.RMRM624569 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun45768Ronald L. Hartman Tom Cramer1994529149U.S.A.WyomingTetonGros Ventre Area: road to Granite Falls; ca 3.4 road mi from U.S. Hwy 191/189.-110.469443.29952256Grassy slopes near lodgepole pine and stream bottom. Phenology: spores.RMRM624570 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun46367Ronald L. Hartman1994623174U.S.A.WyomingSubletteGros Ventre Area: Slide Creek; ca 9 air mi E of Bondurant.-110.235843.19123712408Shaley to sandy slopes and willow bottoms with stands of spruce. Phenology: spores.RMRM642610 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2286Thomas Cramer1994723204U.S.A.WyomingSubletteGreen River Basin: Marsh Creek, ca 12 air mi N of Cora.-110.026743.103623472378Creekside meadows and nearby sagebrush. Phenology: spores.RMRM633485 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2584Thomas Cramer1994731212U.S.A.WyomingSubletteGreen River Basin: South Piney Creek just E of Bridger-Teton National Forest, ca 19 air mi W of Big Piney.-110.480642.499223652408Creek bottom willows and meadows; hillside Douglas fir stands and sagebrush meadows. Phenology: spores.RMRM642609 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2892Thomas Cramer199484216U.S.A.WyomingSubletteGreen River Basin: edge of Green River, ca 1 air mi N of La Barge.-110.191342.2742006Riverside mudflats, meadows, and willows. Phenology: spores.RMRM642597 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4423Thomas Cramer Ben and Becky Cramer1994821233U.S.A.WyomingSweetwaterGreen River Basin: Big Sandy River, ca 1 air mi SW of Farson.-109.4642.09812003Riverside meadows, sagebrush, and open hillsides. Phenology: spores.RMRM633487 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun444Thomas Cramer1994612163U.S.A.WyomingSubletteGreen River Basin: east bank of Green River at south end of Long Island, ca 9 air mi N of La Barge.-110.100342.37972027River bank, cottonwoods, willows, and mud sloughs. Phenology: spores.RMRM633484 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4940Thomas Cramer1994825237U.S.A.WyomingSubletteGreen River Basin: New Fork River, ca 3 air mi WNW of Boulder.-109.761442.765721342164Riverside meadows, willows and cottonwoods, stagnant ponds, irrigation ditchsides, and piney bluffside. Phenology: spores.RMRM828585 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1006Brian Elliott Kenneth Elliott199864155U.S.A.ColoradoLas AnimasWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Purgatoire River; E on County Road 75 from Exit 18 on I-25.-104.457437.21461789Riparian. Phenology: spores.RMRM637973 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5801Thomas Cramer1995610161U.S.A.WyomingSweetwaterGreen River Basin: Big Sandy River, ca 4.5 air mi SW of Farson.-109.507742.06031981Riverside mud and meadows. Phenology: spores.RMRM637972 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6385Thomas Cramer Jane T. Kellett1995619170U.S.A.WyomingSubletteGreen River Basin: ca 4 air mi WNW of Boulder.-109.783242.77592134Riverside meadows and willows. Phenology: spores.RMRM828584 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1213Brian Elliott1998610161U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: North Creek Picnic Ground on the North Creek Road, ca 3 road mi from junction of County Road 387.-105.050438.12272240Riparian with Abies concolor and Pinus edulis. Phenology: vegetative only.RMRM828583 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1238Brian Elliott1998610161U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: Lewis Creek, NE of junction of Colo Hwy 96 and Colo Hwy 165.-105.108938.19562134End of road; riparian with Pinus ponderosa and Abies concolor. Phenology: spores.RMRM637971 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8291Thomas Cramer Jane T. Kellett1995715196U.S.A.WyomingSubletteGreen River Basin: Green River, ca 13 air mi N of Daniel Junction.-110.085743.07752309Wet draw meadow with sagebrush sides. Phenology: spores.RMRM633486 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun912Thomas Cramer1994620171U.S.A.WyomingSubletteGreen River Basin: Big Sandy River, ca 18 air mi N of Farson.-109.517542.35692079Riverbank. Phenology: spores.RMRM637970 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9204Thomas Cramer Jane T. Kellett1995723204U.S.A.WyomingSubletteGreen River Basin: Water Hole Draw at Big Sandy River, ca 23.5 air mi N of Farson.-109.450942.45322103Riverside meadows and willows. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5669Amy J. Roderick1998627178U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: Platte River Parkway, ca 0.3 air mi N of Wyo Hwy 220; ca 1 air mi S of Mills.-106.371942.82921554Thickets along river and adjacent gravelly areas; canary grass common. Phenology: spores.RMRM370945 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11682B. E. Nelson1984912256U.S.A.WyomingCrookBlack Hills: Bear Lodge Mountains: Reuter Campground, ca 3 air mi NW of Sundance.-104.098144.65671036Between the road and fence. Phenology: vegetative only.RMRM828582 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1566Brian Elliott1998613164U.S.A.ColoradoCuster[location and coordinates withheld]2469By a small pond; pasture. Phenology: spores.RMRM382120 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1293Hollis Marriott1982710191U.S.A.WyomingCrookDevils Tower National Monument: between Prairie Dog Town and River.-104.704344.5871173Common on alluvial soil with Stipa comata. Phenology: spores.RMRM370922 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2692Hollis Marriott198367158U.S.A.WyomingCrook[location and coordinates withheld]1097Deciduous woods along stream. Phenology: spores.RMRM370923 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2863Hollis Marriott1983610161U.S.A.WyomingCrook[location and coordinates withheld]1097Deciduous woods along creek. Phenology: vegetative only.RMRM370925 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4131Hollis Marriott198377188U.S.A.WyomingCrookBlack Hills: Bear Lodge Mountains: headwaters of Oak Creek, Cliff Spring, ca 3.4 air mi E of Alva.-104.366944.69861402Pine-oak-aspen forest near spring. Phenology: vegetative only.RMRM370927 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4322Hollis Marriott1983712193U.S.A.WyomingCrook[location and coordinates withheld]1219Roadside. Phenology: vegetative only.RMRM370928 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4388Hollis Marriott1983712193U.S.A.WyomingCrook[location and coordinates withheld]1219Deciduous woods along creek. Phenology: spores.RMRM370929 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4484Hollis Marriott1983712193U.S.A.WyomingCrook[location and coordinates withheld]1371Grassland and disturbed soil around lake. Phenology: spores.RMRM370930 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4884Hollis Marriott1983721202U.S.A.WyomingCrookBlack Hills: Keyhole Reservoir, Belle Fourche River below dam; ca 12 air mi NE of Moorcroft.-104.7897244.39081219River bank. Phenology: spores.RMRM828581 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1923Brian Elliott1998616167U.S.A.ColoradoLas Animas[location and coordinates withheld]1920Riparian; pinyon-juniper. Phenology: spores.RMRM370931 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5119Hollis Marriott1983728209U.S.A.WyomingCrookBlack Hills: Redwater Creek, ca 2.2 air mi WNW of Beulah.-104.1402844.55331097Streambank. Phenology: spores.RMRM370934 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5789Hollis Marriott1983824236U.S.A.WyomingCrookBlack Hills: Houston Creek where it turns south (near Harvey Divide), ca 10 air mi W of Sundance.-104.588744.40421402Grassland, reservoir margins. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5729Amy J. Roderick1998628179U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: North Fork of Casper Creek S of County Road 295, ca 9.4 air mi SE of Alcova townsite.-106.637142.42642060Creek banks dominated by graminoids. Phenology: spores.RMRM370935 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7076Hollis Marriott1984623175U.S.A.WyomingCrook[location and coordinates withheld]1128Strembank. Phenology: spores.RMRM370936 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7096Hollis Marriott1984623175U.S.A.WyomingCrook[location and coordinates withheld]1128Stream margin on mud. Phenology: vegetative only.RMRM370937 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7399Hollis Marriott1984627179U.S.A.WyomingWeston[location and coordinates withheld]1463Bank above small cattail marsh in draw. Phenology: spores.RMRM335909 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun767Hollis Marriott198173184U.S.A.WyomingCrookDevils Tower National Monument: below Spring #2.-104.724444.59221234Common on wet soil in shady draw with Monarda fistulosa. Phenology: vegetative only.RMRM370938 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7750Hollis Marriott198476188U.S.A.WyomingCrook[location and coordinates withheld]1280Sagebrush-grassland (Artemisia cana and A. tridentata), near creek. Phenology: spores.RMRM370919 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8012Hollis Marriott1984711193U.S.A.WyomingCrook[location and coordinates withheld]1676Creek margin. Phenology: spores.RMRM370939 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8256Hollis Marriott1984730212U.S.A.WyomingCrook[location and coordinates withheld]1402Creek bottom in grassland-- on mud at edge of creek. Phenology: vegetative only.RMRM370940 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8358Hollis Marriott198482215U.S.A.WyomingWeston[location and coordinates withheld]1432Roadside (in grassland). Phenology: spores.RMRM370941 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8795Hollis Marriott Dennis Horning198488221U.S.A.WyomingWestonBlack Hills: Elk Mountain area, Clifton Canyon above confluence with Lost Canyon, ca 13.5 air mi SSE of Newcastle.-104.070543.66221371Canyon bottom -- ponderosa pine forest with chokecherry thickets. Phenology: spores.RMRM370942 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8932Hollis Marriott1984810223U.S.A.WyomingWeston[location and coordinates withheld]1783Grassland, in draw between limestone sinkhole and reservoir. Phenology: vegetative only.RMRM370944 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9141Hollis Marriott1984818231U.S.A.WyomingCrookBlack Hills: Inyan Kara Mountain (east half); ca 13.5 air mi S of Sundance.-104.344744.201391615Reservoir in grassland east fo mountain, on dam. Phenology: vegetative only.RMRM828580 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2433Brian Elliott1998622173U.S.A.ColoradoFremontWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: over BLM boundary on U.S. Hwy 50, W of Parkdale.-105.411738.48321829Riparian and pinyon-juniper. Phenology: spores.RMRM370948 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun15886Ronald L. Hartman1983711192U.S.A.WyomingCrookBlack Hills: Belle Fourche River: ca 16 air mi NE of Alva.-104.224444.8725990Shale bluffs, riverbottoms, and sagebrush plains above; flood plains. Phenology: spores.RMRM370933 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun16496Ronald L. Hartman1983718199U.S.A.WyomingCrookBlack Hills: Beaver Creek; ca 6.5 air mi NNW of Alva.-104.4883344.78471158Wooded creek bottoms, prairie, sandy slopes below rock outcrop, and roadside; stream side. Phenology: spores.RMRM828579 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2817Brian Elliott1998627178U.S.A.ColoradoLas Animas[location and coordinates withheld]2439Riparian with beaver marsh; ponderosa pine. Phenology: spores.RMRM828578 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2990Brian Elliott1998628179U.S.A.ColoradoPuebloWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: on Forest Road 320, S of San Isabel.-105.017437.97672439Small campground with Picea and Abies. Phenology: spores.RMRMRS8 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.Herbert W. Graham1926712193U.S.A.ArizonaSanta CruzSanta Rita Mountains: White House Canyon.1646Phenology: spores.RMUSFS884112 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun75049B. E. Nelson2008714196U.S.A.MontanaCarbonPryor Mountains: Custer National Forest: Sage Creek Campground and vicinity on Sage Creek, ca 19 air mi ESE of Bridger.-108.552145.211716821731Stream bank. Phenology: spores.RMUSFS884111 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun75397B. E. Nelson2008720202U.S.A.MontanaCarbonPryor Mountains: Custer National Forest: ridge between Dry Head and Punch Bowl creeks from Crow Indian Reservation boundary SW along trail, ca 28-29 air mi ESE of Bridger.-108.376545.209420122048Along trail through Douglas fir forest, open meadows, and brushy areas. Phenology: vegetative only.RMRM828577 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3449Brian Elliott199876187U.S.A.ColoradoCostilla[location and coordinates withheld]3048On exposed knob above creek with Douglas fir and spruce. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun831Bernadette Kuhn200767158U.S.A.ColoradoBacaComanche National Grassland: Picture Canyon, ca 28.5 air mi SSW of Springfield.-102.744537.01231306Lush canyon with Salix-dominated wet draw. Canyon rim dominated by Juniperus. Shortgrass prairie with Yucca sp., Opuntia sp., and Buchloë dactyloides; grazed. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1099Bernadette Kuhn2007611162U.S.A.KansasMortonCimarron National Grassland: at Recreation Area along the Cimarron River, 9.5 mi NNE of Elkhart.-101.823137.13571038Cottonwood gallery forest along the river with large stands of Tamarix; sandy soil. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2681Bernadette Kuhn Quinn Long, Jennifer Moody-Weiss, and Gianna Short2007713194U.S.A.ColoradoLas AnimasComanche National Grassland: along Purgatoire River, ca 29 air mi SSW of La Junta.-103.653137.57441354Along river bank with Salix exigua thickets. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2937Bernadette Kuhn Amy Tomson200784216U.S.A.ColoradoBacaComanche National Grassland: Carrizo Creek, Carrizo Canyon, ca 29 air mi SW of Springfield.-103.016737.13481449Near picnic area along creek. Hillside and lush creek banks. Uplands dominated by Bouteloua spp. and scattered Rhus aromatica. Creek banks with Salix exigua and Typha. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3888Bernadette Kuhn Darla Jackson, Lonnie Jackson2008512133U.S.A.ColoradoLas Animas[location and coordinates withheld]1557Along creek dominated by Scirpus and Eleocharis. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5673Bernadette Kuhn Cali Hemenway2008624176U.S.A.ColoradoLas Animas[location and coordinates withheld]1856Along base of mesa, dominated by Pinus edulis, Juniperus monosperma, and Juniperus scopulorum. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5783Bernadette Kuhn Cali Hemenway2008625177U.S.A.ColoradoBacaComanche National Grassland: Picture Canyon, ca 28.5 air mi SSW of Springfield.-102.746537.00841297Along creek and sandstone canyon walls. Phenology: spores.RMRM906176 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4098Ben Legler Neil Snow200769160U.S.A.New MexicoColfaxVermejo Park Ranch: along Van Bremmer Creek at Van Bremmer Narrows, 11.5 air mi NNE of Cimarron.-104.851388936.669166672079Small flowing stream in narrow sandstone canyon borderd by cliff on south side; surrounding slopes with open mixed conifer forest. Common on creekbanks; stems scattered. Phenology: spores.RMRM906175 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4223Ben Legler2007612163U.S.A.New MexicoColfaxVermejo Park Ranch: at mouth of Bernal Creek where it joins the Vermejo River at its passage through The Little Wall; 8 air mi NW of Vermejo Park.-105.126944436.949166672504Riparian Populus angustifolia stand with open understory of Ribes cereum, Poa pratensis, Pedicularis procera, Thermopsis montana. Rhizomatous, scattered in wet to moist soil on streamside. Phenology: spores.RMRM906188 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4307Ben Legler2007613164U.S.A.New MexicoColfaxVermejo Park Ranch: unnamed tributary to Gold Creek, 1.25 air mi NE of Upper Underwood Lake.-105.189638936.970555562913Small flowing stream and adjacent wet meadows, under mixed forest of Picea, Abies, and Populus tremuloides. Stems deciduous, scattered in wet rocky soil adjacent to stream. Phenology: spores.RMRM906187 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4548Ben Legler2007618169U.S.A.New MexicoColfaxVermejo Park Ranch: along Vermejo River 7.3 air mi SE of Casa Grande.-104.888888936.806944442150Open gravelly and muddy river bar with Juncus, Carex, Poa, Equisetum. Stems in loose clumps from rhizomes; common in sandy soil. Phenology: spores.RMRM906186 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4619Ben Legler2007619170U.S.A.New MexicoColfaxVermejo Park Ranch: in Spring Canyon 5.1 air mi NW of Casa Grande.-105.027166736.9492484Grassland along canyon floor; dominated by Poa, Bromus tectorum, Bromus sp. Stems scattered in moist soil adjacent to creek; frequent. Phenology: spores.RMRM906185 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5026Ben Legler2007626177U.S.A.ColoradoLas AnimasVermejo Park Ranch: in Lorencito Canyon 0.47 mi N of mouth of Cottonwood Canyon; 1.35 air mi N of Colorado and 21 air mi SW of Trinidad.-104.838333337.011944442270Gently sloping grassland in canyon bottom, with numerous non-native weeds; soil mesic to dry. Stems scattered from deep rhizomes; frequent in moist soil on creek banks. Phenology: spores.RMRM906184 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5220Ben Legler2007629180U.S.A.New MexicoColfaxVermejo Park Ranch: along Canadian River 0.13 mi S of (donwstream from) mouth of Jones Canyon; 9 air mi W of Raton.-104.606138936.909277782125Small flowing river with large dry gravel bar and narrow strip of marshy shoreline dominated by Carex spp., Equisetum laevigatum, grasses. Common in moist to wet soil; stems scattered. Phenology: spores.RMRM906174 Equisetum laevigatum ?physical specimenEquisetaceaeEquisetumlaevigatumA. Braun5841Ben Legler2007712193U.S.A.New MexicoColfaxVermejo Park Ranch: along the Canadian River at mouth of Dargol Canyon; 14 air mi W of Raton.-104.682472236.927861112221Rocky riverbanks and adjacent dry gravel bars, with scattered small Pinus ponderosa saplings, Senecio, Verbascum thapsus, Ratibida columnifera, grasses. Stems in tufts; in dry sandy soil; frequent. Phenology: vegetative only.RMRM906173 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6113Ben Legler2007717198U.S.A.New MexicoColfaxVermejo Park Ranch: road shoulder on north side of Vermejo River in west end of Vermejo Park 2.8 air mi WNW of Casa Grande.-105.029194436.899027782329Raodside ditch with flowing water; sandy soil, with Carex, grasses, Equisetum. Scattered in sandy moist soil; stems tough, apparently evergreen. Phenology: spores.RMRM906172 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6871Ben Legler2007731212U.S.A.New MexicoColfaxVermejo Park Ranch: below dike of cattle watering pond in headwaters of Caliente Canyon, 7.2 air mi ENE of Casa Grande.-104.855638936.924833332462Marshy stream bottom with saturated soil, dominated by Juncus saximontanus, grasses, Carex, Stachys palustris. Cones blunt at tips; stems scattered from deep rhizomes; frequent in saturated soil. Phenology: spores.RMRM906183 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8433Ben Legler200864156U.S.A.New MexicoColfaxVermejo Park Ranch: in Salyers Canyon 5.5 air mi NNW of its junction with the Vermejo River and 6.4 air mi SE of Vermejo Park.-104.88258436.85122274Dry grassy canyon bottom with slopes dominated by Pinus edulis. Scattered in moist soil along stream channel. Specimen GPS: 36.853451, -104.882423. Phenology: spores.RMRM906182 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8506Ben Legler200866158U.S.A.New MexicoColfaxVermejo Park Ranch: along Cerrososo Creek 2.1 air mi N of mouth of Plaza Canyon; 8.5 air mi NNE of Cimarron.-104.88890136.6354222124Small flowing stream with marshy banks, with Eleocharis, Juncus balticus, and Rorippa nasturtium-aquaticum. Common along creek. Specimen GPS: 36.635479, -104.888931. Phenology: spores.RMRM906181 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8635Ben Legler2008610162U.S.A.New MexicoColfaxVermejo Park Ranch: in Valdez Canyon 5.1 air mi NW of mouth of Valdez Canyon and 9.9 air mi SE of Van Bremmer Park.-104.93870536.7477152292Barely flowing stream under Populus angustifolia and Juniperus scopulorum; stream margins with Poa pratensis and Equisetum laevigatum. Scattered but common along creek. Specimen GPS: 36.747726, -104.938675. Phenology: spores.RMRM906180 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8916Ben Legler2008621173U.S.A.New MexicoColfaxVermejo Park Ranch: in upper part of Cerrososo Canyon 3.1 air mi SE of Van Bremmer Park and 3.1 air mi NW of mouth of Lookout Canyon.-105.05428336.801462499Grassland strip in canyon floor with Juncus balticus in low spots; surrounded by Pinus ponderosa forest. Frequent. Specimen GPS: 36.801453, -105.054298. Phenology: spores.RMRM829384 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun57Brian Elliott1998525145U.S.A.ColoradoPuebloWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Greenhorn Road just S of Colo Hwy 165 over Greenhorn Creek.-104.852737.93318171829By bridge; oak-pinyon and riparian. Phenology: spores.RMUSFS866588 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun71789B. E. Nelson Emily Elliott200762153U.S.A.MontanaCarbonBeartooth Mountains: Custer National Forest: along Robertson Draw at the intersection of Forest roads 2008 and 2009 ca 1-1.5 air mi N of Wyoming, ca 11.5 air mi S of Red Lodge.-109.257845.019119262012Gravelly, stony (granitic) slope in a burn. Phenology: spores.RMUSFS872104 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun73381B. E. Nelson2007728209U.S.A.MontanaGallatinGallatin Range: Gallatin National Forest: along Porcupine Creek from trailhead ro 3/4 air mi ESE, ca 3-3.5 air mi SSE of intersection of U.S. Hwy 191 and Mont Hwy 64 (Big Sky), ca 33 air mi SSW of Bozeman.-111.24245.223418651926Meadow draw on steep, stony slope. Phenology: spores.RMRM828600 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun674Brian Elliott Kenneth Elliott199863154U.S.A.ColoradoFremontWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: off U.S. Hwy 50 between Texas Creek and Canon City on Copper Gulch Road, just S of Sunset City.-105.450139.18062201By spring along streambed; riparian and pinyon-juniper. Phenology: spores.RMUSFS862918 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun278Emily Elliott Brian Elliott and B. E. Nelson2007524144U.S.A.WyomingParkBeartooth Mountains: Shoshone National Forest: Clarks Fork Canyon along Morrison Trail, ca 24-25 air mi. NNW of Cody-109.350444.80521414Decomposing granite/ cobble Phenology: spores.RMUSFS866586 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun410Emily Elliott Brian Elliott and B. E. Nelson2007527147U.S.A.MontanaCarbonBeartooth Mountains: Custer National Forest: along East Rosebud Creek, ca 3/4 air mi from forest boundary, ca 17.5 air mi WNW of Red Lodge.-109.588945.24571682Vegatated sand dunes and vegatated dune along roadside. Phenology: spores.RMUSFS872322 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1217aEmily Elliott Brian Elliott200768159U.S.A.MontanaParkGallatin Mountains: Gallatin National Forest: along Forest Road 978, ca 14 air mi SW of Livingston.-110.762545.518617802060Riparian in mixed conifer forest with moss and boggy areas. Phenology: spores.RMUSFS872325 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1517Emily Elliott Ronald L. Hartman2007611162U.S.A.MontanaGallatinGallatin Range: Gallatin National Forest: from 1/4 air mi W of Teepee Creek, towards summmit of Sunshine Point, ca 43 air mi S of Bozeman.-111.172745.062620732408Riparian area. Phenology: spores.RMRM828599 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun899Brian Elliott Kenneth Elliott199864155U.S.A.ColoradoSaguacheWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Cochetopa Hills: Rio Grande National Forest boundary on County Road 46AA NW of Saguache.-106.148338.16872682Riparian; pinyon-ponderosa. Phenology: spores.RMUSFS872326 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2586Emily Elliott Ken Elliott200776187U.S.A.MontanaGallatinGallatin Range: Gallatin National Forest: just off Forest Road 62 by Window Rock Cabin, ca 15.5 air mi SSE of Bozeman.-110.957245.463120542085Open meadow dominated by forbs and stream bank with beaver ponds. Phenology: vegetative only.RMRM828576 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun100Charity Hall Brian Jacobs and Alex Morgan199866157U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: ca 1.5 mi on Forest Road 382 off of Colo Hwy 165; ca 0.5 mi along and around trail from Squirrel Creek Trailhead.-105.05438.049725602621Dominant species: ponderosa, blue spruce, aspen, and willow; soil included granite chunks. Phenology: spores.RMUSFS866587 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3718Emily Elliott Brian Elliott and Bonnie Hiedel2007727208U.S.A.MontanaParkBeartooth Mountains: Custer National Forest: E of U.S. Hwy 212 and Clarks Fork Yellowstone and Broadwater rivers at Lillis Lake, ca 31 air mi WSW of Red Lodge.-109.840445.018524692500Riparian, moist meadow, lake shore. Phenology: spores.RMRM828569 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1031Charity Hall Brian Jacobs and Alex Morgan1998621172U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountain Valley: intersection of County roads 119 and 130.-105.438338.06432434Soil fine-grained to gravelly in texture; dominant species: Trifolium and grasses. Phenology: spores.RMUSFS863421 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun85516Ronald L. Hartman2007614165U.S.A.MontanaStillwaterBeartooth Mountains: Custer National Forest: ca 4 air mi SW of Nye, along Stillwater River.-109.859345.4031490Roadside park along the river and adjacent limestone outcrop. Phenology: spores.RMRM938799 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun85770Ronald L. Hartman2007617168U.S.A.MontanaCarbonWater Birch Fishing Access on Rock Creek, ca 0.5 mi either way of center of access area.-109.193345.31641477Stream bottom and adjacent parking lot. Phenology: spores.RMRM938800 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun85799Ronald L. Hartman2007617168U.S.A.MontanaCarbon0.5 air mi S of Columbus on Mont Hwy 78 at Itch-kep-pe Park along the Yellowstone River.-109.252145.62841088Along river and throughout park. Phenology: spores.RMRM938798 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun38144B. E. Nelson Ronald L. Hartman1996612164U.S.A.WyomingParkBeartooth Mountains: between Line Creek and Montana at the foot of Beartooth Plateau, ca 9.5-10.5 air mi NW of Clark; ca 35.5-36 air mi NNW of Cody-109.279545.003117982103Banks and meadows along the creek. Phenology: vegetative only.RMRM919474 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun305Laura E. Lukas2007610161U.S.A.WyomingAlbanyMedicine Bow Mountains: Sheep Mountain, along Johns Creek, W of former County Road 424, ca 23 mi W of Laramie; ca 6.5 mi SE of Centennial.-106.02241.26522459Prunus thicket with conifers and maple. Phenology: spores.RMRM919517 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun614Laura E. Lukas2007616167U.S.A.WyomingAlbanyMedicine Bow Mountains: around confluence of Owen and Squaw creeks, ca 2 mi NW of intersection of County Road 47 (Fox Creek Road) and Wyo Hwy 230, ca 26 mi SW of Laramie.-106.045341.14052395Wet meadow in gulch. Phenology: vegetative only.RMRM919516 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun817Laura E. Lukas2007618169U.S.A.WyomingCarbonMedicine Bow Mountains: School Creek, 2 mi E of Platte River, 1 mi N of intersection of BLM Road 3404 and County Road 660 (French Creek Road), ca 21 air mi SE of Saratoga.-106.523841.22092357Wet meadow and woods. Phenology: fruiting.RMRM829383 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1391Charity Hall Brian Jacobs and Alex Morgan1998625176U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Sangre de Cristo Range: San Isabel National Forest: ca 3.2 road mi on County Road 198 from Colo Hwy 69.-105.66638.26542536Near stream; fine-grained soil; dominant species: oak and Thermopsis. Phenology: spores.RMRM919477 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1319Laura E. Lukas2007625176U.S.A.WyomingAlbanyMedicine Bow Mountains: Douglas and Lake Creek area, just E of Lake Creek Resort, near intersection of Forest roads 512 and 509, ca 13 air mi SW of Centennial.-106.238341.11692505Wet meadows along creek. Phenology: fruiting.RMRM919476 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1632Laura E. Lukas2007629180U.S.A.WyomingCarbonMedicine Bow Mountains: Sixmile Creek and Lost Park area, ca 3 air mi SW of Pelton Creek Campground, ca 40 air mi SW of Laramie; ca 36 sir mi SE of Saratoga.-106.354641.05522669Wet meadow along creek. Phenology: vegetative only.RMRM828567 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1469Charity Hall B. E. Nelson, Brian Jacobs and Alex Morgan1998627178U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: San Isabel National Forest: off of County Road 274 just beyond national forest entrance.-105.218738.210227592948Along stream and mountainsides; dominant species: aspen, oak, and Mertensia. Phenology: spores.RMRM919515 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3160Laura E. Lukas2007725206U.S.A.WyomingAlbanyMedicine Bow Mountains: near Lake Owen Creek, ca 1 air mi E of Lake Owen, ca 11 air mi S of Centennial.-106.065241.144823282506Brunt draw, near creek. Phenology: vegetative only.RMRM828568 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1933bCharity Hall Brian Jacobs and Alex Morgan199876187U.S.A.ColoradoHuerfanoWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Culebra Range: San Isabel National Forest: Trail 1302 or Spring Creek Trail, ca 1/4 trail mi beyond trailhead.-105.110437.374726822713Fine-grained soil; dominant species: ponderosa, aspen, and white fir. Phenology: spores.RMRM919473 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6574Laura E. Lukas2008723205U.S.A.WyomingCarbonMedicine Bow Mountains: area surrounding Lincoln Park Campground, ca 4 air mi N of Ryan Park; ca 16 air mi SE of Saratoga.-106.513341.37552448Along creek at edge of park and forest. Phenology: spores.RMRM828566 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2045Charity Hall Brian Jacobs and Alex Morgan1998710191U.S.A.ColoradoLas AnimasWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Culebra Range: North Fork State Wildlife Area: off of Forest Road 34 from Colo Hwy 12.-105.05637.243726522675Forest and open meadow; fine-grained soil; dominant species: aspen, oak, and ponderosa. Phenology: spores.RMRM828575 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun276Charity Hall Brian Jacobs and Alex Morgan1998610161U.S.A.ColoradoAlamosaWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity. Sangre de Cristo Range: Rio Grande National Forest: along Mosca Trail to Mosca Pass.-105.494937.725925302963Along stream and adjacent slopes; sandy soil. Phenology: spores.RMRM828574 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun359Charity Hall Brian Jacobs and Alex Morgan1998611162U.S.A.ColoradoHuerfanoWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Sangre de Cristo Range: Huerfano State Wildlife Area: ca 2.5 road mi on County Road 580 from junction of County Roads 581 and 580.-105.385437.682226522664Dominant species: Salix, pinyon pine, and Thermopsis. Phenology: vegetative only.RMRM154191 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun137O. A. Stevens Wm. A. Kluender1935711192U.S.A.North Dakotano countySandy bank above river. Phenology: spores.RMRM39087 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.J. Lunell1898713194U.S.A.North DakotaBensonLeeds.Wet soil. Phenology: spores.RMRM157817 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.J. Lunell1908630182U.S.A.North DakotaBensonLeeds.Phenology: vegetative only.RMRM154190 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.O. A. Stevens1935626177U.S.A.North DakotaRichlandKindred.Sandy ridge of low prairie. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.Frank E. Hepner189863154U.S.A.South DakotaBrookingsNear Brookings.Phenology: spores.RMRM46054 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.J. Lunell190368159U.S.A.North DakotaBensonLeeds.Wet ground. Phenology: spores.RMUSFS400924 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun19280Theodor Krueger191464155U.S.A.Nebraskano countyNebraska National Forest.Phenology: vegetative only.RMRM242653 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.Harry Hapeman18976152U.S.A.NebraskaKearneyMinden.Phenology: spores.RMRM242645 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.Carrie Hapeman1891511131U.S.A.NebraskaKearneyFort Kearney.Phenology: vegetative only.RMRM236036 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun28355Walter Kiener1952621173U.S.A.NebraskaDawson1 mi W of Gothenburg.780Wet meadow. Phenology: spores.RMRM539162 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun18817Ralph E. Brooks1987716197U.S.A.NebraskaBuffalo1/2 mi W of Poole, north side South Loup River.Grassy terrace several feet above water level; sandy, well drained soil. Scattered plants. Phenology: spores.RMRM398842 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun81Karin M. Guernsey198771182U.S.A.NebraskaKimballNorth side Lodgepole Creek: 1.7 mi NNE of Pine Bluffs, WY: E of road dividing sections 11 and 12.1368Wet meadow; first terrace. Phenology: spores.RMRM527901 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun16013Ralph E. Brooks1982629180U.S.A.NebraskaWebster2 mi N of Amboy, W of county road and E of railroad.Large spring fed marsh. Common. Phenology: spores.RMUSFS400931 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2354Peter F. Stickney1971721202U.S.A.MontanaMissoulaClearwater River: 0.3 mi W of Blanchard Lake, 12.1 mi SSE of Seeley Lake PO.1158River terrace; grassland; Festuca scabrella, Potentilla gracilis. Locally frequent. Phenology: vegetative only.RMUSFS407875 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun303J. C. Whitman19147182U.S.A.Montanano countyBeartooth National Forest.Phenology: spores.RMUSFS407876 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun741Jay J. McGlinch R. L. Harris1921825237U.S.A.MontanaStillwaterStillwater District: Meyers Creek.1745South slope; moist, black loam; Aster, Viola, Geranium; moist, shady places. Not abundant. Phenology: vegetative only.RMUSFS400930 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun547W. W. Wetzel1927820232U.S.A.MontanaParkGallatin National Forest: Big Creek Ranger Station.1798Pasture; slope level; swamp. Phenology: vegetative only.RMUSFS400929 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun43William G. McGinnies1924619171U.S.A.MontanaLewis and ClarkHelena National Forest: North Fork Soup Creek.1524South slope; gravel soil; Agropyron spicatum, Phacelia. Scattered. Phenology: spores.RMUSFS400928 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun21Frank A. Clark191485217U.S.A.MontanaCascadeMiilegan Ranger Station.1158Slope level; soil damp; river bottom; cocklebur, browse. Phenology: vegetative only.RMUSFS400927 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun80A. A. Saunders1912810223U.S.A.MontanaLewis and ClarkLewis And Clark National Forest: West Fork South Fork Sun River.1585Moist hummus soil in shade of spruce near stream. Phenology: vegetative only.RMUSFS400695 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1925Charles H. McDonald1965625176U.S.A.MontanaRavalliBitterroot National Forest: Stevensville Ranger Station.1006Slope 5% west; sandy loam soil; ditch banks; sedge, quack-grass, cicuta. Scattering. Phenology: spores.RMUSFS400712 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1377James C. Whitham193294248U.S.A.MontanaYellowstoneHeron Ranch.731Level, open-meadow; moist clay soil; Bluestem. Common. Phenology: spores.RMUSFS408779 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun387R. B. Rolfe1921630181U.S.A.MontanaPowder RiverCuster National Forest: Otter Creek.1036Steep slope; moist deep clay loam soil. Not very abundant. Phenology: vegetative only.RMRM739046 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun21667Erwin F. Evert199179190U.S.A.MontanaParkYellowstone Valley: south shore of Dailey Lake, ca 15 mi N of Gardiner.-110.807445.25561597Lakeshore with Distichlis stricta, Festuca arundinacea, Spartina gracilis, and Scirpus nevadensis. Phenology: spores.RMRM739138 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun21772Erwin F. Evert1991718199U.S.A.MontanaSweet Grass[location and coordinates withheld]1280Weedy riparian area with Populus balsamifera, Salix lasiandra, Agrostis stolonifera, and Betula occidentalis. Phenology: spores.RMRM739484 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun21138Erwin F. Evert1991627178U.S.A.MontanaStillwaterSwinging Bridge Fishing Access along the east side of the Stillwater River ca 6 mi NE of Absarokee.-109.32645.58891158Riparian area with Populus balsamifera, Toxicodendron rydbergii, and Cornus stolonifera. Phenology: spores.RMRM738599 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun20603Erwin F. Evert1991610161U.S.A.MontanaMadisonBear Trap Canyon along trail ca 2-3 mi S of trailhead along the east side of the Madison River.-111.588445.545214021432Shrubland and narrow riparian area with Toxicodendron rydbergii, Symphoricarpos occidentalis, and Prunus virginiana. Phenology: spores.RMRM612517 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun24771Erwin F. Evert199363154U.S.A.MontanaSweet GrassBeartooth Mountains: in foothills along Bridger Creek on Bridger Creek Road, ca 17 mi N of Nye.-109.757945.66161432Weedy, riparian area west of road and creek with Populus angustifolia, Cornus stolonifera, and Viola canadensis. Phenology: spores.RMRM610903 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun26386Erwin F. Evert199381213U.S.A.MontanaMadison[location and coordinates withheld]1814Disturbed and mowed areas above river with Bromus inermis, Sisymbrium altissimum, Matricaria matricarioides, and Alyssum desertorum. Phenology: spores.RMUSFS408778 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun415James C. Whitham1921719200U.S.A.MontanaPowder RiverCuster National Forest: Whitetail Ranger Station.1036Pasture. Phenology: vegetative only.RMRM355599 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6075Robert W. Lichvar1983613164U.S.A.MontanaCarbonYellowtail Reservoir: ca 3/4 mi upstream from Layout Creek.1115Rock amphitheater. Phenology: vegetative only.RMRM355534 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6154Robert W. Lichvar1983615166U.S.A.MontanaBig HornBlack Canyon Campground.1128Moist north facing slopes with Pinus. Phenology: spores.RMRM355398 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun782Ellen Collins1983616167U.S.A.MontanaBig HornYellowtail Reservoir: S of Big Bull Elk Creek.1128Sanddunes with Agropryon/Chrysothamnus cover class. Phenology: vegetative only.RMRM355554 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5865Robert W. Lichvar198369160U.S.A.MontanaCarbonNorth Fork Trail Creek.-108.203945.10841204Cottonwood bottom. Phenology: buds.RMRM21401 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3514P. A. Rydberg189778189U.S.A.MontanaMadisonNear Pony.2743Phenology: spores.RMRM89677 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun756J. W. Blankinship190661152U.S.A.MontanaGallatinBozeman.1402Wet meadows. Phenology: spores.RMRM89673 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Brauns.n.J. W. Blankinship1906820232U.S.A.MontanaDeer LodgeAnaconda.Low ground. Phenology: buds.RMRM157808 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun564L. M. Umbach1903728209U.S.A.MontanaGlacierMidvale Creek.Creek bank. Phenology: spores.RMRM384455 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1399Blaine H. M. Mooers1986817229U.S.A.MontanaRoosevelt40 km N of Brockton, 3 km W of Allen Bummer's farmstead.731Silt loam, slope 3% west, wet meadow range dominated by Spartina pectinata, site rarely grazed. Phenology: vegetative only.RMRM384598 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1169Blaine H. M. Mooers Gloria R. B. Moors1986611162U.S.A.MontanaSheridanSandhills Wilderness Area.614Silt loam, Slope 2% north; narrow wet meadow with several large pools. Phenology: spores.RMRM928883 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8976Laura E. Lukas2009615166U.S.A.WyomingCarbonSaratoga Valley: South Fork Lake Creek and Goetze Creek area, 2 mi W of forest Boundary and ca 7 air mi ENE of Saratoga.-106.693141.489721522156Creek in sagebrush steppe, Populus overstory. Phenology: spores.RMRM928882 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9116Laura E. Lukas2009622173U.S.A.WyomingCarbonMedicine Bow Mountains: Cedar Ridge and Cottonwood Creek, ca 3 air mi NE of Wyo hwys 130 and 230 intersection, ca 9 air mi SE of Saratoga.-106.706241.373621442151In and around creek in sagebrush hills. Phenology: spores.RMRM928881 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9473Laura E. Lukas2009629180U.S.A.WyomingCarbonHanna Basin: just S of I-80 and along the northeast end of Halleck Ridge, ca 12 air mi WNW of exit 255 (Elk Mountain/Hanna) and ca 1.5 air mi SW of Quealy Gap.-106.559441.7432205Draws in sagebrush hills. Phenology: spores.RMRM928880 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9938Laura E. Lukas200977188U.S.A.WyomingCarbonMedicine Bow Mountains: Bennet Peak and near North Platte River and campground, ca 28 air mi NE of Encampment and ca 14 air mi SW of Ryan Park.-106.576941.264822022231Banks of the river. Phenology: spores.RMRM828573 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun637Charity Hall Brian Jacobs and Alex Morgan1998615166U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountain Valley: ca 2.4 road mi on Airport Road from Colo Hwy 69.-105.310238.020526522713Along small stream and open fields; soil fine-grained to gravelly in texture; dominant species: Chrysothamnus. Phenology: spores.RMRM828572 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun675Charity Hall Brian Jacobs and Alex Morgan1998615166U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountain Valley: NE of De Weese Reservoir.-105.438338.210223172347Fine-grained soil; dominant species: Senecio and Penstemon. Phenology: spores.RMRM823558 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun322Michael Schiebout2004630182U.S.A.New MexicoUnionKiowa National Grassland: Forest Road K79; along Corrumpa Creek, 0.56 mi W of state line.-103.01583336.6663891420Shortgrass prairie and river basin. Phenology: flowering.RMRM828571 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun760Charity Hall Brian Jacobs and Alex Morgan1998615166U.S.A.ColoradoFremontWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: ca 0.5 road mi on Colo Hwy 69 just before the intersection with U.S. Hwy 50.-105.579138.398819111920Soil sandy in texture with granite chunks; dominant species: Chrysothamnus, juniper, and Salix. Phenology: vegetative only.RMRM824056 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6807Michael Schiebout2005629180U.S.A.New MexicoUnionClayton Lake State Park: 12 air mi NW of Clayton.-103.31388936.5869441574Rocky-sandy soil, from lake to steppe. Phenology: flowering & fruiting.RMRM824109 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3250Michael Schiebout2005511131U.S.A.New MexicoUnionClayton State Park: north end of park.-103.3136.5794441570Along and around trail, flood plain and up the cliff walls. Phenology: flowering & fruiting.RMRM828570 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun832Charity Hall Brian Jacobs and Alex Morgan1998615166U.S.A.ColoradoFremontWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Acres of Ireland, ca 1/4 mi on Highland Drive from U.S. Hwy 50.-105.832938.417520732103By a small stream; dominant species: oak, Douglas fir, and horsetails. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1514Rick McNeill200873185U.S.A.MontanaMeagherLewis and Clark National Forest: Little Belt Mountains: South Fork Tenderfoot Road, ca 2 air mi from junction with Forest Road 589.-111.095546.92041725Riparian zone and meadow NW of road; southwest aspect, 5-30% slope, limestone bedrock.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2935Rick McNeill2008729211U.S.A.MontanaLewis and ClarkLewis and Clark National Forest: Front Range: along South Fork Sun River at campground, ca 1 air mi N of the junction of South Fork Sun River with Wood Creek.-112.888647.50281614Riparian zone along river; Picea engelmannii/Populus tremuloides/Pseudotsuga menziesii; sandstone/limestone bedrock. Phenology: fruiting.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3740Rick McNeill2008815228U.S.A.MontanaTetonLewis and Clark National Forest: Front Range: at confluence of the North Fork Sun River and Circle Creek, ca 7 air mi NW of Mortimer Gulch Campground, ca 4 air mi NNW of K Bar L Ranch.-112.891347.6751495Island and riparian zone. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3755Rick McNeill Addy Wycgans2008816229U.S.A.MontanaTetonLewis and Clark National Forest: Front Range: North Fork Sun River Valley, along Forest Trail 268, from south slope of Elk Hill to junction with Forest Trail 201, ca 2 air mi NW of K Bar L Ranch.-112.874147.67691641In open meadow on east side of the river; west aspect, 5-25% slope; mixed sedimentary. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun87213Ronald L. Hartman Rick McNeill2008613165U.S.A.MontanaChouteauLewis and Clark National Forest: Highwood Mountains: Shonkin Creek at forest boundary, trail to Prospect Peak, ca 8 air mi S of Shonkin-110.511947.505413381646East aspect above creek with shrubs, forest margins, barren areas, and outcrops at summit. Phenology: fruiting.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun88197Ronald L. Hartman2008810223U.S.A.MontanaFergusLewis and Clark National Forest: Big Snowy Mountains: Half Moon Canyon.-109.316146.770819922186Sub alpine meadows with seep. Phenology: fruiting.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun88323Ronald L. Hartman2008812225U.S.A.MontanaMeagherCa 2 air mi SE of Forest Road 274 (Spring Creek Road) on U.S. Hwy 12 or 6.5 mi NW of Wheatland County.-110.407446.52061524Roadside ditch.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun88531Ronald L. Hartman2008816229U.S.A.MontanaFergusLewis and Clark National Forest: Big Snowy Mountains: Crystal Lake to Knife Blade Ridge. Crystal Lake Trail head up trail.-109.508946.793918571886Through coniferous forest, moderately dense to dense. Phenology: fruiting.RMUSFS872327 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4550Emily Elliott Brian Elliott200869161U.S.A.MontanaParkAbsaroka Range: Gallatin National Forest: along Forest Road 3245 between switchbacks, ca 2 mi NE of Gardiner .-110.678445.05121935Along beaver ponds and in saturated meadow. Phenology: spores.RMRM938797 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5204Emily Elliott Brian Elliott2008626178U.S.A.MontanaParkParadise Valley: U.S. Hwy 89 and the Yellowstone River at Grey Owl Boat ramp and fishing access, ca 19 air mi SSW of Livingston.-110.704245.39771463Riparian area in flooded flood plain. Phenology: spores.RMUSFS872328 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5725Emily Elliott Brian Elliott200879191U.S.A.MontanaGallatinGallatin Range: Gallatin National Forest: along Buffalo Horn Creek, ca 40 air mi S of Bozeman; from Buffalo Horn Trailhead to Tom Miner Trailhead.-111.198445.105720122567Stream bank. Phenology: spores.RMRM828565 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun60731Ronald L. Hartman Melanie Arnett, Charity Hall, Brian Jacobs, and Alex Morgan199861152U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountain Valley: Brush Hollow Road (County Road 260) along Brush Hollow Creek.-105.346838.18125302591Metamorphic outcrops, roadside, and stream bottom. Phenology: spores.RMRM828564 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun60819Ronald L. Hartman Melanie Arnett, Charity Hall, Brian Jacobs, and Alex Morgan199861152U.S.A.ColoradoFremontWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountain Valley: Bear Gulch at Grape Creek.-105.349638.328220732088Rocky slopes with oak and pinyon and area along creek. Phenology: spores.RMRM828563 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun61465Ronald L. Hartman1998617168U.S.A.ColoradoLas AnimasWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Raton Mesa: I-25 at confluence of Gallinas and Raton creeks to 1 air mi to N.-104.52537.058320122103Stream side and pinyon-juniper-oak woodland. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6974Rick McNeill2009720201U.S.A.MontanaJudith BasinLewis and Clark National Forest: Little Belt Mountains: tributary of Big Hill Creek, Forest Road 3304, ca 1.3 air mi SW of Holiday Camp Trailhead.-110.482446.74012103Small, wet meadow; stream flowing east; 0-10% slope; Pinus contorta. Phenology: spores.RMUSFS886557 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun77206B. E. Nelson2009613164U.S.A.South DakotaHardingCuster National Forest: South Cave Hills: upper Casper Gulch on the southwest side of the mesa, ca 11 air mi N of Buffalo.-103.566345.74389511036Canyon bottom with green ash. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun520Hans Hallman2009614165U.S.A.South DakotaHardingEast Short Pine Hills: ca 0.5 air mi N of Forest Road 3111, ca 6 air mi E of Harding.-103.710345.383311031213Wet hardwood draw dominated by green ash. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun597Hans Hallman2009618169U.S.A.South DakotaHardingS of SD Hwy 20 ca 3.5 air mi ESE of Jumpoff Divide, ca 9.5 air mi W of Buffalo.-103.735745.5698878935Grass-dominated open, rolling grazing land.RMUSFS891562 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1246Hans Hallman2009625176U.S.A.MontanaCarterCuster National Forest: Ekalaka Hills: in and around the head of Flasted Draw, 1.5-2 air mi SW of Red Hill and ca 3.5 air mi E of Ekalaka.-104.476445.891211001112Hardwood draw dominated by green ash and chokecherry. Phenology: spores.RMUSFS886558 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2038Hans Hallman2009712193U.S.A.South DakotaHardingCuster National Forest: West Short Pine Hills: in and around generally west-facing draws ca 2.5 air mi SSW of JK Butte, ca 10 air mi SSE of Camp Crook.-103.944845.426710851121Flowing water draw dominated by green ash and boxelder. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2103Hans Hallman2009713194U.S.A.South DakotaHardingOn the west side of The Jumpoff, ca 1 air mi E of County Road 897 and ca 3 air mi S of SD Hwy 20, ca 7.5 air mi ESE of Camp Crook.-103.827645.5361969975Aspen-dominated draw. Phenology: spores.RMUSFS891561 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3012Hans Hallman2009726207U.S.A.MontanaCarterCuster National Forest: Long Pines: in the vicinity of Red Bluff Spring, just W of Forest Road 3117, ca 5 air mi SSW of Mill Iron and ca 16.5 air mi ESE of Ekalaka.-104.235545.78579751006East-facing rocky slope with mix of ponderosa pine, green ash, and hardwood shrubs. Phenology: spores.RMUSFS891560 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3353Hans Hallman2009730211U.S.A.MontanaCarterCuster National Forest: Ekalaka Hills: in the vicinity of Russel Spring just S of Camp Needmore off of Forest Road 3104, ca 6.5 air mi SE of Ekalaka.-104.457145.823311611167Moist riparian area dominated by grasses. Phenology: spores.RMUSFS891559 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3570Hans Hallman200981213U.S.A.MontanaPowder RiverCuster National Forest: Ashland Ranger District: Cook Mountain Hiking and Riding Area: in the vicinity of Cliff Spring and areas SE, W of Forest Road 4772, ca 9 air mi NE of Ashland.-106.135145.671310791091Draw dominated by boxelder, ponderosa pine, and snowberry. Phenology: vegetative only.RMUSFS891558 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4497Hans Hallman G. Gust2009818230U.S.A.MontanaCarterCuster National Forest: Ekalaka Hills: in and around McNab Pond, at terminus of Forest Road 1401, ca 0.5 air mi NE of Mont Hwy 323, ca 7 air mi SE of Ekalaka.-104.431445.836210421073In and around pond dominated by Scirpus and Typha spp. and grasses on its margin. Phenology: spores.RMRM828562 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun62420Ronald L. Hartman1998722203U.S.A.ColoradoLas AnimasWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Picketwire Valley, ca 1 mi E of Cordova Plaza.-104.80237.12722042Roadside. Phenology: spores.RMRM828561 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun62754Ronald L. Hartman Jim Fowler and Jason Fowler1998724205U.S.A.ColoradoHuerfanoWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Culebra Range: Indian Creek from Indian Creek trailhead, ca 0.8 air mi NW.-105.130137.463626522682Mesic canyon with dry, sandy, volcanic outcrops to north. Phenology: spores.RMRM862919 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun14058Brian Elliott200876188U.S.A.WyomingParkBeartooth Mountains: Shoshone National Forest: near Clarks Fork Trailhead on Wyo Hwy 296, ca 17 air mi SE of Cooke City, Montana.-109.649144.88112030Pond and associated wetlands by old beaver dam. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6639Amy J. Roderick1998718199U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: Blue Gulch N of Wyo Hwy 220, ca 3.2 air mi NW of Alcova townsite.-106.747442.58417071725Draw with sagebrush, rabbitbrush, and wild licorice. Phenology: spores.RMUSFS891557 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5416Hans Hallman2010628179U.S.A.MontanaPowder RiverCuster National Forest: Ashland Ranger District: N of Forest Road 4409, generally between Cabin Creek Spring and Deer Creek Spring, ca 11 air mi ENE of Ashland.-106.070345.664310791097Wet draw with Amelanchier, Fraxinus, Prunus, Crataegus, grasses, and sedges surrounded by ponderosa pine forest. Phenology: spores.RMUSFS891556 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6510Hans Hallman2010721202U.S.A.MontanaPowder RiverCuster National Forest: Ashland Ranger District: in the vicinity of Cabin Spring near the junction of Forest roads 4425 and 4776D, ca 1.5 air mi N of U.S. Hwy 212, ca 15 air mi E of Ashland.-105.955445.575811121158Ponderosa pine woodland with grass-dominated understory. Phenology: vegetative only.RMUSFS891555 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6697Hans Hallman2010724205U.S.A.MontanaCarterCuster National Forest: Long Pines: ca 0.5 air mi S of the junction of Forest roads 3818 and 3036, ca 3.5 air mi WNW of Lantis Spring and ca 22 air mi SE of Ekalaka.-104.246145.647310361039Flowing-water draw with juniper, cottonwood, and green ash. Phenology: spores.RMUSFS891554 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6873Hans Hallman2010727208U.S.A.MontanaPowder RiverCuster National Forest: Ashland Ranger District: in the vicinity of Cow Creek, just S of Forest Road 4095, ca 1.5 air mi W of Otter Creek Road or Mont Hwy 484, ca 2 air mi WSW of Fort Howes.-106.184845.294310361060In vicinity of flowing-water draw with cottonwood, green ash, Juncus, and Salix. Phenology: vegetative only.RMUSFS898943 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2481Michael K. Kirkpatrick201076187U.S.A.ColoradoPitkin[location and coordinates withheld]2118Wet meadow fed by hot springs. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun79845B. E. Nelson Joseph L. M. Charboneau2010612163U.S.A.MontanaPhillipsLittle Rocky Mountains: above the old Landusky Mining Camp and just below the Zortman-Landusky Gold Mine on the south side of Gold Bug Butte, ca 47 air mi SW of Malta.-108.617847.907313811440Open aspen-ponderosa pine woods. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun471Joseph L. M. Charboneau2010624175U.S.A.MontanaValleyOn Ridge Road, on ridge above Tony Coulee, ca 2.5 air mi SW of Finn Reservoir, ca 36 air mi SW of Glasgow.-107.25947.91868954Drainage bottom. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun171Amy J. Roderick199674186U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Mill Creek NW of gravel pit, ca 3.5 air mi SW of town of Elk Mountain.-106.449741.664422402256Open meadow dominated by grasses, forbs, and willows. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1731Joseph L. M. Charboneau2010715196U.S.A.MontanaPhillipsAssiniboine Creek, W of Assiniboine Road, ca 8 air mi WNW of the confluence of Assiniboine Creek with the Milk River, ca 10 air mi NNW of Malta.-107.976148.4826762792Grassland valley. Phenology: vegetative only.RMRM828923 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7271Brian Elliott Elizabeth Mark and Kenneth Elliott1999617168U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: junction of Colo hwys 96 and 165 "McKenzie Junction".-104.637637.41992545Roadside and mixed Picea engelmannii and Pseudotsuga. Phenology: spores.RMRM828922 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7409Brian Elliott Elizabeth Mark1999618169U.S.A.ColoradoLas AnimasWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: along old railroad bed between Cordova Plaza and Weston.-104.838337.12722073Riparian, railroad right-of-way. Phenology: vegetative only.RMRM828921 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7444Brian Elliott Elizabeth Mark1999618169U.S.A.ColoradoLas AnimasWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Park Plateau: Bosque de Oso Wildlife Area, Torres Canyon, SW of Weston.-104.891737.09582256Riparian with Quercus. Phenology: spores.RMRM828920 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7725Brian Elliott Elizabeth Mark1999627178U.S.A.ColoradoSaguacheWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Sangre de Cristo Range: on Forest Road 990, ca 2 air mi E of Poncha Pass on U.S. Hwy 285, ca 1/2 mi W of Rio Grande National Forest.-106.055538.40362804Riparian. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7020Amy J. Roderick1998720201U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Pathfinder Reservoir: North Platte River E of BLM Road 3108, ca 4.2 air mi N of Kortes Dam.-106.890242.23851786Greasewood flats at rivers edge; disturbed. Phenology: spores.RMRM828919 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8048Brian Elliott Elizabeth Mark199971182U.S.A.ColoradoLas Animas[location and coordinates withheld]2439Riparian and wet meadow. Phenology: spores.RMRM828918 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8700aBrian Elliott Elizabeth Mark1999710191U.S.A.ColoradoCostilla[location and coordinates withheld]2621Riparian. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun82258B. E. Nelson2011626177U.S.A.MontanaValleyAlong Burnett Creek E of Rock Creek Road, ca 19 air mi NNE of Hinsdale.-106.956748.6475728Along the stream. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4417Joseph L. M. Charboneau201164155U.S.A.MontanaPhillipsAssiniboine Creek and ridge to the NE, ca 2.5 air mi W of the Milk River, ca 8 air mi NNE of Malta.-107.848848.4619710774Streamside. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4480Joseph L. M. Charboneau201164155U.S.A.MontanaPhillipsSpring Coulee, W of U.S. Hwy 191, ca 1.5 air mi W of the Milk River, ca 10.5 air mi NNE of Malta.-107.764948.496692762Streamside. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7102Amy J. Roderick1998723204U.S.A.WyomingFremontUpper North Platte and Laramie River Drainages: Big Diamond Spring N of Diamond Springs Road, ca 20.3 air mi NE of Jeffrey City.-107.592842.71522103Creek drainage and holding pond. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5777Joseph L. M. Charboneau Mark Majerus, Michael Dolan, Noorjahan Parwana, Katie Butts, and Mary Frieze2011624175U.S.A.MontanaPhillipsAmerican Prairie Reserve: West Edrix Road at bridge over Telegraph Creek, ca 5 air mi NE of Indian Lake, ca 38 air mi ESE of Zortman; ca 41.5 air mi SSE of Malta.-107.767347.779711Riparian area. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6296Joseph L. M. Charboneau2011630181U.S.A.MontanaPhillipsLarb Hills (North): N of Cottonwood Creek, ca 4 air mi S of Bauer Reservoir, ca 13 air mi SW of Saco; ca 17.5 air mi ESE of Malta.-107.508448.3002756807Moist coulee bottom with thickets. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6618Joseph L. M. Charboneau201173184U.S.A.MontanaValleyUhlan Coulee, ca 2.5 air mi W of Porcupine Creek, ca 23 air mi N of Fort Peck; ca 12 air mi NE of Glasgow.-106.450448.3321777823Moist coulee bottoms. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7022Joseph L. M. Charboneau201177188U.S.A.MontanaValleyS of Tiger Butte Road, ca 3 air mi SSE of Tiger Butte, ca 7 air mi NNW of Fort Peck; ca 9.5 air mi SE of Glasgow.-106.504248.0986670673Grasslands with fringed sage on sandy soil with swales. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7877Joseph L. M. Charboneau2011719200U.S.A.MontanaPhillipsAmerican Prairie Reserve: south bank of Beaver Creek ca 3.5 air mi NNE of Holzhey Reservoir, ca 23 air mi ENE of Zortman; ca 30 air mi SSW of Malta.-108.044547.9455780798Moist coulee bottom. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8440Joseph L. M. Charboneau2011731212U.S.A.MontanaPhillipsBowdoin National Wildlife Refuge: along Refuge Tour Road, near Black Coulee Pond, ca 6 air mi NW of Le Noir Reservoir, ca 3.5 air mi E of the Milk River, ca 7 air mi ENE of Malta.-107.735248.3844682689Wetlands interspersed with groves of cottonwood and Russian olive and chokecherry-willow thickets. Phenology: spores.RMRM828902 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun9261Brian Elliott Elizabeth Mark1999722203U.S.A.ColoradoCusterWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Sangre de Cristo Range: San Isabel National Forest: from Alvarado Campground up the Rainbow Trail to the Venable Peak Trail, ca 6 air mi SW of Westcliffe.-105.566438.07892804Abies concolor and Pinus ponderosa with Quercus gambellii. Phenology: vegetative only.RMUSFS Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun85516Ronald L. Hartman2007614165U.S.A.MontanaStillwaterBeartooth Mountains: Custer National Forest: ca 4 air mi SW of Nye, along Stillwater River.-109.859345.4031490Roadside park along the river and adjacent limestone outcrop. Phenology: spores.RMUSFS Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun410Emily Elliott Brian Elliott and B. E. Nelson2007527147U.S.A.MontanaCarbonBeartooth Mountains: Custer National Forest: along East Rosebud Creek, ca 3/4 air mi from forest boundary, ca 17.5 air mi WNW of Red Lodge.-109.588945.24571682Vegatated sand dunes and vegatated dune along roadside. Phenology: spores.RMRM816114 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun170Cynthia Villa2001618169U.S.A.ColoradoGrandBlue Valley Ranch: Downhill (SE) of Hydro approx. 100 meters, just above ditch.2353Phenology: vegetative only.RMRM816115 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun492Cynthia Villa200188220U.S.A.ColoradoGrandBlue Valley Ranch: E of river and W of Henney.2249Wet meadow. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7218Amy J. Roderick1998724205U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: Rattlesnake Hills: northwest end of range S of Dry Creek Road, ca 17.8 air mi SW of Waltman.-107.434142.8732103Wet meadow of graminoids and forbs. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun871bMichael K. Kirkpatrick2010531151U.S.A.ColoradoMesaBattlement Mesa: White River National Forest: upper Wallace Creek drainage, ca 6-7 air mi NNW of Collbran.-107.993139.329522562621Riparian channel and wet meadow. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1412bMichael K. Kirkpatrick2010615166U.S.A.ColoradoEagleUSFS-administered "tree farm" along the north shore of the Roaring Fork River, ca 1 air mi WSW of El Jebel.-107.105639.394519511966Riparian wetlands, woodlands, and dry meadows. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5561bMichael K. Kirkpatrick201162153U.S.A.ColoradoMesaBattlement Mesa: White River National Forest: Little Alkali Creek Canyon upstream of confluence with creek leading to Bull Basin, ca 1 air mi NW of Housetop Mountain and 7 air mi E of De Beque.-108.078239.33118291951Riparian corridor through juniper-oak woodland dominated by cottonwood, willow, and cattail. Phenology: vegetative only.RMRM828885 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun64631Ronald L. Hartman1999624175U.S.A.ColoradoHuerfanoWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: County Road 634 along Ute Log Gulch, ca 10 air mi NNW of Gardner.-105.23737.918425602591Ponderosa pine forest and streamside. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun75049B. E. Nelson2008714196U.S.A.MontanaCarbonPryor Mountains: Custer National Forest: Sage Creek Campground and vicinity on Sage Creek, ca 19 air mi ESE of Bridger.-108.552145.211716821731Stream bank. Phenology: spores.RMRM908234 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8116Jeanette Flaig2008715197U.S.A.ColoradoGrandBlue Valley Ranch: along Beaver Creek, W of Working Headquarters, S of Yust Reservoir.2235Along creek just off ranch road. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun659Emma E. Freeland2012613165U.S.A.MontanaMadisonRuby Range: Cottonwood Creek, ca 4 air mi WSW of Ruby River Reservoir, ca 20 air mi S of Sheridan.-112.22945.18221905Near a seep along the side of a road. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2038Hans Hallman2009712193U.S.A.South DakotaHardingCuster National Forest: West Short Pine Hills: in and around generally west-facing draws ca 2.5 air mi SSW of JK Butte, ca 10 air mi SSE of Camp Crook.-103.944845.426710851121Flowing water draw dominated by green ash and boxelder. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8618Lori E. Brummer2012610162U.S.A.ColoradoMesaUncompahgre Plateau: Dominguez Canyon: between 3 and 4 trail mi down canyon from Dominguez Campground, ca 23 air mi WSW of Delta.-108.500638.760920672085Small riparian area along seep/creek in pinyon/juniper. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8704Lori E. Brummer2012614166U.S.A.ColoradoDeltaNorth Fork Valley: along side road between Bowie and Colo Hwy 133, ca 6 air mi NE of Paonia.-107.507938.92181812Roadside along irrigation ditch. Phenology: spores.RMRM909925 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3603Bonnie Heidel201265157U.S.A.WyomingCrookBlack Hills: Devils Tower National Monument: between road and Belle Fourche River, ca 2 mi SW of entrance.1176Disturbed valley bottom, on loam, with Nassella viridula, Poa pratensis, and Elymus smithii. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3045Joshua J. Irwin2010728209U.S.A.IdahoCusterChallis National Forest: Lost River Range: valley of Bear Creek below Methodist Gulch, 8.4 air mi NE of Mackay.-113.4784343.987592211Sandy or gravelly soil in hydric herbaceous riparian vegetation; 9° slope, NNE aspect; silty, sandy limestone geology. Population is dominant throughout the area.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1447Joshua J. Irwin2010624175U.S.A.IdahoLemhiSalmon National Forest: Salmon River Mountains: Hot Springs Creek between the Hot Springs and forest road crossing, 5.5 air mi SSW of Shoup.-114.3372645.307481324Well developed soil in mesic woody riparian vegetation; 20° slope, WNW aspect; granite geology. 76-150 individuals apparent.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5009Joshua J. Irwin2011614165U.S.AIdahoLemhiSalmon National Forest: Salmon River Mountains: vicinity of Moyer Basin housing and work facility, 23.1 air mi WSW of Salmon.-114.3128945.020851686>150 plants estimated in xeric coarse textured soil within woody riparian vegetation, 9 degree slope, WNW aspect, quartzite geology. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5293Joshua J. Irwin2011620171U.S.AIdahoCusterSouthern Salmon River Mountains: lower seepage area of Alkali Spring, 14.8 air mi S of Challis.-114.2891544.29534171025-75 plants estimated in mesic coarse textured soil within a dry wash, 9 degree slope, NNW aspect, arenite geology. 25-75 plants estimated. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6275Joshua J. Irwin2011714195U.S.AIdahoLemhiBirch Creek Valley: Birch Creek tributary ca 0.8 mi N of the confluence with Rocky Canyon, 35.1 air mi SE of Leadore.-112.9769344.2521197225-75 plants estimated in xeric fine textured soil within shrub-steppe vegetation, no slope, alluvial geology. 25-75 plants estimated. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7886Joshua J. Irwin2011814226U.S.AIdahoCusterNorth end of Lost River Range: along U.S. Hwy 93, vicinity of pump station just N of Eagle Rock, 13.1 air mi NNE of Challis.-114.0763144.6611437>150 plants estimated in mesic coarse textured soil within woody riparian vegetation, no slope, trachyandesite geology. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun90359Ronald L. Hartman2010727208U.S.A.IdahoLemhiSalmon National Forest: Lemhi Range: Boulder Flat along Hayden Creek Road (Forest Road 08) 1.4 road mi from forest boundary, ca 14.5 air mi SW of Tendoy.-113.714644.75681882Douglas fir forest and adjacent stream.RMRM691161 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1609C. H. Refsdal199476187U.S.A.WyomingSweetwaterBasins and Mountains of Southwest Wyoming: Seedskadee National Wildlife Refuge: ca 30 air mi NW of Green River; west side of the Green River.-109.833441.91920Grasses and willows in sandy soils. Phenology: spores.RMRM914597 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10760Robert D. Dorn2013728209U.S.A.WyomingGoshenCa 4 air mi NE of Lingle.-104.28166742.1751310Moist meadow, with Carex and Juncus. Phenology: vegetative only.RMRM914380 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun10895Robert D. Dorn2013816228U.S.A.WyomingGoshenPacker Lake ca 5 mi ESE of Huntley.-104.06166741.91250Grassland, with artemisia filifolia and Calamovilfa. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun91576Ronald L. Hartman Emma E. Stewart2011613164U.S.A.IdahoLemhiNorthern Salmon River Mountains: Salmon Wild and Scenic River/Frank Church - River of No Return Wilderness: along Horse Creek from the river ca 0.5 mi N to Pinto Creek.-114.73676745.403683884932RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun92073Ronald L. Hartman2011816228U.S.A.IdahoCusterChallis National Forest: Southern Salmon River Mountains: ca 3 road mi N of Ida Hwy 75 on Squaw Creek Road, along road for ca 100 m, ca 19.5 air mi SW of Challis.-114.4669544.2799331736Talus slopes and roadside.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4678Emma E. Freeland2013530150U.S.A.MontanaMadisonMadison River and foothills of Gravelly Range: ca 21 air mi S of Ennis, ca 13 air mi NE of Black Butte, ca 1 air mi SW of BLM Ruby Creek Campground.-111.674945.05251692Dry meadow on a riverbank. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5345Emma E. Freeland2013611162U.S.A.MontanaBeaverheadBeaverhead Valley: Henneberry Gulch, ca 13 air mi SW of Dillon, ca 4 air mi NW of Gallagher Mountain.-112.791145.05041737Moist stream bank. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun5711Emma E. Freeland2013618169U.S.A.MontanaMadisonTobacco Root Mountains: Harris Creek, ca 14-15 air mi WNW of Ennis, ca 6 air mi SW of South Baldy Mountain.-112.016645.417121002115Dry to moist meadow on a hillside. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6035Emma E. Freeland2013623174U.S.A.MontanaBeaverheadCentennial Valley: north side of Red Rock River, ca 10 air mi SSE of Antone Peak, ca 48 air mi SE of Dillon.-112.128144.64492012Saturated meadow dominated by Salix candida. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6938Emma E. Freeland2013717198U.S.A.MontanaBeaverheadFoothills of the Snowcrest Range: Blacktail State Wildlife Management Area: East Fork Blacktail Deer Creek, ca 10 air mi NW of Antone Peak, ca 27 air mi SE of Dillon.-112.272544.90152042Banks of a large creek. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7679Emma E. Freeland201381213U.S.A.MontanaMadisonMadison Valley: Eight Mile Ford Fishing Access site, ca 4 air mi S of Ennis, along County Road 36.-111.755745.29891536Moist to wet meadow along a river and next to a boat access gravel road. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8065Emma E. Freeland2013810222U.S.A.MontanaMadisonMadison Valley: BLM Palisades Recreation Area, ca 26 air mi S of Ennis, ca 12 air mi NE of Black Butte.-111.657644.987917221731Dry, disturbed grasslands. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2375C. H. Refsdal Duane Atwood and Lucy Jordan199482214U.S.A.UtahDaggettSouthwestern Wyoming and Adjacent Utah: Grasshopper Island in the Green River, ca 11 air mi E of Dutch John.-109.290240.90881664Shoreline. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2448C. H. Refsdal Duane Atwood and Lucy Jordan199483215U.S.A.UtahDaggett[location and coordinates withheld]1652Irrigation ditch. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun833Lori E. Brummer201072183U.S.A.ColoradoDeltaGunnison Gorge Wilderness: Ute Trail to Gunnison River, ca 13 air mi ESE of Delta.-107.863938.682316031987Riparian area along river. Phenology: vegetative only.RMRM691159 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2672C. H. Refsdal199489221U.S.A.WyomingSweetwaterBasins and Mountains of Southwest Wyoming: Seedskadee National Wildlife Refuge: ca 27 air mi NW of Green River; 0.8 mi NE of Refuge Headquarters.-109.858141.91431926Dry meadow, prairie, sandy. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun3107Lori E. Brummer2011525145U.S.A.ColoradoMesaUncompahgre Plateau: Dominguez Canyon, middle section of trail to Cactus Park Trail junction, ca 20 air mi NNW of Delta.-108.43838.800315091737Riparian area in desert canyon. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4044Lori E. Brummer2011615166U.S.A.ColoradoMesaUncompahgre Plateau: Divide Road: Carson Hole Trailhead to Carson Hole, then NE along Dominguez Creek, ca 29.5 air mi W of Delta.-108.614538.736923292655Riparian area in ponderosa pine. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7638Amy J. Roderick Kevin J. Taylor199886218U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Ferris Mountains: Miners Canyon on northeastern side of range, ca 16 air mi N of Independence Rock.-107.123842.267419512012Along creek; chokecherry, hawthorn, willow, boxelder, and sagebrush common. Phenology: spores.RMRM921452 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11082Robert D. Dorn201469160U.S.A.WyomingPlatteCa 5 mi NW of Wheatland.-105.09166742.1033331402Roadside, with Sisymbrium and Equisetum. Phenology: flowering.RMRM799722 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun57Walter Fertig Jane Struttmann1991622173U.S.A.MontanaCarbonBighorn Canyon National Recreation Area: roadside campground in narrow canyon, ca 1.5 mi NW of Barrys Landing.12191463Grassy, open, west-facing sagebrush slopes above canyon.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2456Georgia G. Thomas2014527147U.S.A.IdahoIdahoNez Perce National Forest: Middle Fork Clearwater Wild and Scenic River: Race Creek Trail Head: along Selway River, ca 3 mi upriver from Race Creek along Forest Trail 4, above Balinger Rapids, ca 23 mi NNE of Elk City.-115.151246.0795565Rocky, open, Pinus ponderosa dominated streamside slope. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4751Georgia G. Thomas2014729210U.S.A.IdahoIdahoNez Perce National Forest: Middle Fork Clearwater Wild and Scenic River: Selway River Drainage: Selway Falls, ca 20 mi on Forest Road 223, ca 33 air mi E of Stites.-115.290146.0453624Rocky road cut.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun92342Ronald L. Hartman Jack Hartman2012610162U.S.A.IdahoIdahoNez Perce National Forest: Gospel Hump Wilderness: along the Wind River ca 1 air mi from Wind River Pack Bridge on Salmon River, ca 18.5 air mi E of Riggins.-115.9387545.4663762823Switch backs on open slope. Phenology: spores.RMRM940085 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun11884Robert D. Dorn2017621172U.S.A.South DakotaLawrenceCa 1.5 mi NW of Dalton Lake.-103.49544.2433331402Rocky roadside, with Medicago, Bromus. Phenology: fruiting.RMRM615283 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7058Robert D. Dorn1996720202U.S.A.WyomingBig HornManderson.-107.9644.26921219Roadside ditch, with Agropyron, Clematis. Phenology: spores.RMRM957920 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun54Nancy E. Hastings2013729210U.S.A.WyomingPlatteCamp Guernsey: east end of transect ca 5.2 km due W of Emigrant Hill Road, ca 5.5 km SW of Range Guard 1.1470Southwest-flowing drainage, drying below; perennial pools in drainage; silty loam to mud to water; with Veronica anagallis-aquatica, Salix exigua, Bouteloua curtipendula, Juniperus scopulorum, Typha latifolia, Agrostis stolonifera, Carex, Juncus spp. Local; ascending to erect, rhizomatous, fern-ally; 3 dm tall. Phenology: spores.RMRM957921 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun43Nancy Hastings2013618169U.S.A.WyomingPlatteCamp Guernsey: 2.39 [km] NNE of Baldy Mountain, 5.38 [km] due E of the North Platte River.1470Slightly sloped; ephemeral stream in drainage; silty loam to muck to water; with Juniperus scopulorum, Glyceria striata, Veronica anagallis-aquatica, Equisetum laevigatum, Carex, Poa spp. Local; erect, fern-ally; 4 dm tall. Phenology: vegetative only.RMRM957560 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun811Carlos A. Popolizio Nancy E. Hastings, Rosalie M. Smith, Donald L. Hazlett1996614166U.S.A.WyomingPlatteCamp Guernsey: Cantonment, just N of North Platte River, 0.5 km SW of Guernsey Landing Field.1340Riverfront with moderate stones; riparian; sand and stones; with Poa palustris, Poa pratensis, Salix, Carex spp., Mentha sp. Scattered; erect, rhizomatous, perennial herb; to 1 m tall. Phenology: spores.RMRM957561 Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun850Carlos A. Popolizio Nancy E. Hastings, Rosalie M. Smith, Donald L. Hazlett1996616168U.S.A.WyomingPlatteCamp Guernsey: south side of North Platte River, ca 2.2 km N of Cottonwood Creek and ca 2 km S of Impact Area.1340Gentle to steep slope; riverine; gravelly to stony loam; depression near culvert; with Acer negundo, Prunus virginiana, Symphoricarpos occidentalis, Ribes, Poa spp. Locally common; erect, rhizomatous, perennial herb; 6-8 dim tall; branching below collar. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7929Amy J. Roderick199888220U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: Pathfinder Reservoir and Mountain: Bishop Point Recreation Area, ca 3.4 air mi W of County Road 409; ca 10.5 air mi SW of Alcova townsite.-106.904742.49661792Along creek; graminoids dominant; Ribes and big sage common. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun6375C. H. Refsdal Barbara McNight199581213U.S.A.UtahDaggettSouthwestern Wyoming and Adjacent Utah: Browns Park: Green River, ca 13 air mi ESE of Dutch John; 1.8 mi S of junction of Jarvie Ranch/Browns Park roads on west side Browns Park Road.-109.137340.879816461670River's edge, river rock, clay soils. Phenology: vegetative only.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8092Amy J. Roderick1998812224U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Seminoe Mountains: Morgan and Marking Pen creeks on County Road 351, ca 2 air mi W of Seminoe Dam.-106.929142.16632103Along creek; cottonwood and aspen common. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun7872C. H. Refsdal199592245U.S.A.UtahDaggettNorth Slope Uinta Mountains: Flaming Gorge National Recreation Area: Carter Creek, ca 8.1 air mi S of Manila on north side of Utah Hwy 44.-109.57740.865321952225Creekside, willows, Picea, red sandy soils. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8219Amy J. Roderick1998815227U.S.A.WyomingNatrona[location and coordinates withheld]20302073Along creek; birch, chokecherry, willow, limber pine, and snowberry common. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1024Timothy W. Chumley1995621172U.S.A.ColoradoJeffersonEast-central Colorado: Mosquito Range to Plains: Rampart Range: Cheesman Mountain off County Road 126 along the Gill Trail, the South Platte River, and west-facing and north-facing slopes of the mountain, ca 2.5 air mi SW of Deckers.-105.268939.236619752418On coarse granitic sand and gravel of south-facing river bank, among occasional boulders. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1152Timothy W. Chumley1995623174U.S.A.ColoradoParkEast-central Colorado: Mosquito Range to Plains: off Blue Mountain or Wagon Tongue or County Road 98 or Forest Road 239 at intersection with Forest Road 240 at Blue Mountain and Fish Creek.-105.3638.918925602814On the banks of the stream. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1191Timothy W. Chumley1995628179U.S.A.ColoradoParkEast-central Colorado: Mosquito Range to Plains: Tarryall Mountains: off Forest Road 207, on the banks and slopes above the South Platte River, ca 1/2 road mi N of USFS Happy Meadows Campground; ca 2-1/2 air mi N of town of Lake George.-105.3639.020226822782Along the banks of the river. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun1293Timothy W. Chumley1995630181U.S.A.ColoradoFremontEast-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: Parkdale Recreation Area off U.S. Hwy 50 along the south bank of the Arkansas River, ca 11.4 air mi WNW of Canon City.-105.393138.483217531762Along the banks of the river. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun2463Timothy W. Chumley1995725206U.S.A.ColoradoFremontEast-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: along the north face of Little Crampton Mountain and W along Cottonwood Creek, ca 1.5 air mi W of Colo Hwy 9, ca 13.5 air mi WNW of Canon City.-105.448838.568820732347In a flat, low area adjacent to the creek. Phenology: spores.RMRM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun8457Amy J. Roderick1998818230U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: Steamboat Lake S of Wyo Hwy 220, ca 19 air mi W of Alcova townsite.-107.081642.54031786Alkaline flats near lake. Phenology: vegetative only.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun701Timothy W. Chumley1995612163U.S.A.ColoradoFremontEast-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: Rice Gulch between BLM Deer Park Trail Road 5826 or County Road 347 and County Road 69, along a tributary of Wilson Creek, ca 11.7 air mi SW of Cripple Creek.-105.337538.62624082579On banks of stream in open grassy drainage. Phenology: spores.RM Equisetum laevigatumphysical specimenEquisetaceaeEquisetumlaevigatumA. Braun4067Timothy W. Chumley1996625177U.S.A.ColoradoFremontEast-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: Gardner Peak/Crampton Mountain: on slopes, ridges and peaks and along Tallahassee Creek, off County Road 21A ca 15.2 air mi ENE of Canon City.-105.485838.540323782722In a rocky drainage in ponderosa pine at lower elevation. Phenology: spores.36003,1,0true