Record Number Database Code Specimen ID Project Herbarium Accession Number Barcode NPS Accession NPS Catalog Family Genus 1 Specific Epithet 1 Specific Author 1 Infraspecific Rank 1 Infraspecific Epithet 1 Infraspecific Author 1 Name 1 Qualifier Name 1 Qualifier Position Hybrid Symbol Genus 2 Specific Epithet 2 Specific Author 2 Infraspecific Rank 2 Infraspecific Epithet 2 Infraspecific Author 2 Name 2 Qualifier Name 2 Qualifier Position Conservation Status Annotations Site Key Collector Collector Number Other Collectors Day Collected Month Collected Year Collected Verbatim Collection Date Country State County Locality Site Description Minimum Elevation Maximum Elevation Elevation Unit LatitudeLongitude UTM TRS Decimal Latitude Decimal Longitude Geodetic Datum Coordinate Uncertainty Coordinate Uncertainty Unit Elevation Georeferenced TRS Georeferenced Georeference Sources Georeference Remarks Georeferenced By Specimen Notes Other Notes Phenology Cultivated Images Type Specimen? TypeDetails 1 RM 114301 Ebertowski 2002 RM Asteraceae Ambrosia artemisiifolia L. RM-14466 Peter J. Ebertowski 3689 1 9 2002 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: along West Plum Creek on Plum Creek or County Road 30, ca 6.5 air mi NW of Newcastle, ca 7 air mi ESE of Osage. Mosaic of sagebrush/grassland and ponderosa pine. 4460 ft. 43.9359° N, 104.289° W; uncertainty 0.5 mi. T46N R62W S27 SE1/4 43.9359 -104.289 1 mi. Flowering and Fruiting N N 2 RM 119122 Ebertowski 2003 RM Asteraceae Ambrosia artemisiifolia L. RM-14587 Peter J. Ebertowski 7791 7 8 2003 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: ravine running NE from Buck Creek, on Forest Road 926, ca 24 air mi E of Wright; ca 39 air mi W of Newcastle. Ravine of sand and sandstone formations. 4480 4540 ft. 43.7568° N, 105.0101° W T44N R68W S27 NE1/4 43.7568 -105.0101 Flowering N N 3 RM 119370 Ebertowski 2003 RM Asteraceae Ambrosia artemisiifolia L. RM-14595 Peter J. Ebertowski 8039 11 8 2003 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: Lake Creek and hills to the E, on Forest Road 1420C, ca 34 air mi SE of Wright; ca 44 air mi NNE of Douglas. Ravine floor with inland saltgrass and alkali sacaton. 4460 4610 ft. 43.37° N, 105.0906° W T39N R69W S12 N1/4 43.37 -105.0906 Flowering N N 4 RM 272085 Larson 2006 RM 949630 RM0154748 Asteraceae Ambrosia artemisiifolia L. RM-22425 Ronald L. Hartman 83126 13 8 2006 U.S.A. New Mexico Taos [location and coordinates withheld] Canyon slopes and bottom. 7960 8000 ft. Flowering N RM0154748 N 5 RM 272124 Larson 2006 RM 949629 RM0154747 Asteraceae Ambrosia artemisiifolia L. RM-22425 Ronald L. Hartman 83165 13 8 2006 U.S.A. New Mexico Taos [location and coordinates withheld] Canyon slopes and bottom. 7960 8000 ft. Flowering N RM0154747 N 6 RM 272364 Larson 2006 RM 949628 RM0154746 Asteraceae Ambrosia artemisiifolia L. RM-22431 Ronald L. Hartman 83404 15 8 2006 U.S.A. New Mexico Taos Carson National Forest and Vicinity: Arroyo Aquaje de la Petaca. Arroyo bottom by collapsed bridge. 8100 ft. 36.6927° N, 105.9648° W; uncertainty 0.25 mi. T28N R9E S3 NE1/4; also W1/4 S2 36.6927 -105.9648 0 mi. Flowering N RM0154746 N 7 RM 27896 Arizona/New Mexico USFS 469685 Asteraceae Ambrosia artemisiifolia L. RM-6020 Jack Magee 379 5 9 1925 U.S.A. Arizona Pima Coronado National Forest: near Florida Station. Woodland grass-browse community in sandy loam on a steep north slope with boutelouas, hilaria and prosopis. 4300 ft. Flowering and Fruiting N N 8 RM 325061 Newton 2006 RM Asteraceae Ambrosia artemisiifolia L. RM-25307 Rachel Newton 6446 28 7 2006 U.S.A. Wyoming Weston [location and coordinates withheld] Dry, shaded uplands. 4674 ft. Flowering N N 9 RM 325079 Newton 2006 RM Asteraceae Ambrosia artemisiifolia L. RM-25309 Rachel Newton 6464 29 7 2006 U.S.A. Wyoming Crook Wetlands and Adjacent Areas: Keyhole Reservoir, ca 9 air mi NE of Moorcroft. Dry, rocky uplands. 4193 ft. 44.36615° N, 104.83463° W; GPS Reading T51N R66W S30 SE1/4 44.36615 -104.83463 NAD 83 GPS Reading Flowering N N 10 RM 325086 Newton 2006 RM Asteraceae Ambrosia artemisiifolia L. RM-25310 Rachel Newton 6471 29 7 2006 U.S.A. Wyoming Crook Wetlands and Adjacent Areas: Oak Creek, ca 16 air mi NW of Beulah; ca 24 air mi NE of Sundance. Dry uplands. 3746 ft. 44.71639° N, 104.25112° W; GPS Reading T55N R62W S36 N1/2 of SW1/4 44.71639 -104.25112 NAD 83 GPS Reading Flowering N N 11 RM 325156 Newton 2006 RM Asteraceae Ambrosia artemisiifolia L. RM-25311 Rachel Newton 6540 29 7 2006 U.S.A. Wyoming Weston Wetlands and Adjacent Areas: seeping spring, ca 7 air mi NE of Newcastle. Dry, sandy Pinus forest. 4834 ft. 43.89099° N, 104.07884° W; GPS Reading T45N R60W S8 NE1/4 of SE1/4 43.89099 -104.07884 NAD 83 GPS Reading Flowering N N 12 RM 325171 Newton 2006 RM Asteraceae Ambrosia artemisiifolia L. RM-25312 Rachel Newton 6555 29 7 2006 U.S.A. Wyoming Weston [location and coordinates withheld] Dry, wooded uplands. 4689 ft. Flowering N N 13 RM 344735 Reif 2002 RM 806247 RM0106237 Asteraceae Ambrosia artemisiifolia L. RM-32879 Brian Reif 3454 8 8 2002 U.S.A. New Mexico Santa Fe Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Rio Frijoles Trail 154 just E of Santo Domingo de Cundiyo Land Grant, 8 air mi SE of Chimayo. SE in canyon along trail for 0.2 air mi from E edge of land grant. Riparian of river, and meadows, in canyon bottom with mixed conifer slopes. Canyon tightening upstream with encroachment of granitic cliffs. 7000 ft. 35° 56.278' N, 105° 52.398' W; GPS reading T20N R10E S27 NW1/4 35.937967 -105.8733 GPS reading Flowering N RM0106237 N 14 RM 353240 Reif 2003 RM 806246 RM0106236 Asteraceae Ambrosia artemisiifolia L. RM-33164 Brian Reif 9409 2 9 2003 U.S.A. New Mexico San Miguel Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Anton Chico Grant: Pecos River at prominent oxbow, 5 air mi ENE of Villanueva. Grazed, north, sedimentary bank of river dominated by Russian olive. 5610 ft. 35.2695° N, 105.2804° W; GPS Reading T12N R16E S18 NE1/4 35.2695 -105.2804 GPS Reading Flowering N RM0106236 N 15 RM 353298 Reif 2003 RM 806245 RM0106235 Asteraceae Ambrosia artemisiifolia L. RM-33167 Brian Reif 9466 3 9 2003 U.S.A. New Mexico Los Alamos [location and coordinates withheld] Roadside and canyon bottom on tuft/volcanics in ponderosa pine forest. 6300 ft. Flowering N RM0106235 N 16 RM 358083 RMHERB1 RM 7611 RM0231588 Asteraceae Ambrosia artemisiifolia L. RM-34629 Aven Nelson 2483 21 7 1896 U.S.A. Wyoming Sheridan Pass Creek. 4400 5000 ft. 44.9758° N, 107.45° W; uncertainty 5 mi. T58N R88W S26 44.9758 -107.45 5 mi. Y Y Flowering N RM0231588 N 17 RM 361140 RMHERB1 RM 7610 RM0231572 Asteraceae Ambrosia artemisiifolia L. RM-36444 Aven Nelson s.n. 7 9 1896 U.S.A. Wyoming Albany Laramie. 7200 ft. 41.3133° N, 105.5844° W; uncertainty 5 mi. T16N R73W S33 41.3133 -105.5844 5 mi. Flowering N RM0231572 N 18 RM 374807 RMHERB1 RM 38311 RM0231587 Asteraceae Ambrosia artemisiifolia L. RM-18639 Frank Tweedy 3129 9 1900 U.S.A. Wyoming Johnson Buffalo. 4000 5000 ft. 44.3509° N, 106.6924° W; uncertainty 3 mi. T51N R82W S35 44.3509 -106.6924 3 mi. Fruiting N RM0231587 N 19 RM 391870 RMHERB1 RM 600629 RM0231590 Asteraceae Ambrosia artemisiifolia L. RM-53669 Robert D. Dorn 6764 30 9 1995 U.S.A. Wyoming Laramie 1 mi SE of Cheyenne. Roadside with Helianthus and Oenothera. 6000 ft. 41.1175° N, 104.7338° W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO! T13N R66W S2 SE1/4 SE1/4 41.1175 -104.7338 NAD 83 700 ft. N N Nat. Geog. TOPO! BEN Fruiting N RM0231590 N 20 RM 406617 RMRS RMRS Asteraceae Ambrosia artemisiifolia L. 1. Ambrosia artemisiifolia L.
Annotated by Doris W. Hayes. RM-2399 Charles P. Pase 1265 19 8 1961 U.S.A. Arizona Apache Apache National Forest: 1 mi W of Eagar. 7100 ft. T8N R29E S10 34.11099 -109.26739 NAD 83 1 mi. N N Nat. Geog. TOPO! Flowering N N 21 RM 408380 RMRS RMRS Asteraceae Ambrosia artemisiifolia L. RM-64016 Herbert W. Graham 8-17-10 17 8 1910 U.S.A. Arizona Pima Near Tucson; along Mission Road; in garden. 2400 ft. Flowering N N 22 RM 437212 South Dakota USFS 469689 USFS0069786 Asteraceae Ambrosia artemisiifolia L. RM-66761 Clarke A. Anderson 40 27 7 1945 U.S.A. South Dakota Pennington Black Hills National Forest: Big Bend. 5% south slope; coarse gravel soil; comeback land type; distributed in disturbed areas. 4200 ft. 44.0608° N, 103.4028° W; uncertainty 1 mi. T1N R6E S9 44.0662 -103.4114 NAD 83 1 mi. Y Nat. Geog. TOPO! ELEVSTR 4300 f (USGS 7.5) G. Bryson Flowering N USFS0069786 N 23 RM 438506 South Dakota RM 568176 RM0231955 Asteraceae Ambrosia artemisiifolia L. RM-67412 Gary E. Larson 10655 James R. Johnson 19 8 1991 U.S.A. South Dakota Custer Custer State Park: disturbed roadside on alluvial plain of French Creek. Redbed soils. 3700 ft. 43.7118° N, 103.3511° W; uncertainty 0.5 mi. T4S R6E S12 SW1/4 43.7118 -103.3511 1 mi. Common. Flowering N RM0231955 N 24 RM 441881 Jewel Cave RM 365360 RM0231956 Asteraceae Ambrosia artemisiifolia L. RM-68469 Hollis Marriott 9946 20 8 1985 U.S.A. South Dakota Custer Jewel Cave National Monument: U.S. Hwy 16 between Jewel Cave Road and old area. Roadside. 5550 ft. T4S R2E S1 N1/2 43.7369 -103.8309 NAD 83 0 mi. Nat. Geog. TOPO! Flowering N RM0231956 N 25 RM 442575 South Dakota USFS 469688 USFS0069787 Asteraceae Ambrosia artemisiifolia L. RM-68916 Ralph K. Gierisch 1554 20 8 1949 U.S.A. South Dakota Custer Harney National Forest. Level slope; deep loam soil; roadside and cultivated field vegetation type; distributed in disturbed soil; common. 5300 ft. 43.7009° N, 103.6039° W; uncertainty 1 mi. T4S R4E S14 43.7009 -103.6039 1 mi. Y ELEVSTR: 5270 5470 f (USGS 7.5') G. Bryson RMH Buds N USFS0069787 N 26 RM 443410 South Dakota RM 70089 Asteraceae Ambrosia artemisiifolia L. RM-69208 S. S. Visher 372 11 7 1910 U.S.A. South Dakota Harding Little Missouri River Valley: 25 mi N of Ashcroft. [ends up in North Dakota] Open woods. 2900 3300 ft. T23N R1E S24 45.9448 -103.9365 NAD 83 5 mi. Y Y Nat. Geog. TOPO! Buds N N 27 RM 443863 South Dakota RM 92465 RM0231954 Asteraceae Ambrosia artemisiifolia L. RM-69443 W. H. Over 13822 2 8 1921 U.S.A. South Dakota Lawrence Whitewood. Vacant lot. 3650 ft. T6N R4E S21 44.4618 -103.6384 NAD 83 1 mi. Y Y Nat. Geog. TOPO! GKB Flowering N RM0231954 N 28 RM 481061 So Rocky Mts RM 393627 Asteraceae Ambrosia artemisiifolia L. RM-89269 Dieter H. Wilken 14564 30 8 1985 U.S.A. Colorado Larimer North side of Dixon Reservoir, at base of Dixon Canyon Dam, Horsetooth Reservoir. SC1/4 On gravelly soil with Agropyron beneath Populus. 5250 ft. 40.5608° N, 105.1451° W; uncertainty 1 mi. T7N R69W S20; S20 (sic) 40.5608 -105.1451 1 mi. Fruiting N N 29 RM 488271 So Rocky Mts RM 155161 Asteraceae Ambrosia artemisiifolia L. RM-91679 George E. Osterhout 4193 14 10 1909 U.S.A. Colorado Weld New Windsor. Fruiting N N 30 RM 489503 So Rocky Mts RM 155154 Asteraceae Ambrosia artemisiifolia L. RM-91821 George E. Osterhout 6348 21 9 1924 U.S.A. Colorado Weld Windsor. Fruiting N N 31 RM 489506 So Rocky Mts RM 155147 Asteraceae Ambrosia artemisiifolia L. Ambrosia artemisiifolia L.
Annotated by C. L. Porter in 1968. RM-91822 George E. Osterhout 6353 27 9 1924 U.S.A. Colorado Larimer Along road S of Forks Hotel. Fruiting N N 32 RM 489508 So Rocky Mts RM 99507 Asteraceae Ambrosia artemisiifolia L. Ambrosia artemisiifolia L.
Annotated by C. L. Porter in 1968. RM-91822 George E. Osterhout 6353 27 9 1924 U.S.A. Colorado Larimer Along road S of Forks Hotel. Fruiting N N 33 RM 489511 So Rocky Mts RM 155156 Asteraceae Ambrosia artemisiifolia L. RM-81240 George E. Osterhout 6358 30 9 1924 U.S.A. Colorado Weld Windsor: lakeshore near the depot. Fruiting N N 34 RM 489773 So Rocky Mts RM 155151 Asteraceae Ambrosia artemisiifolia L. Ambrosia artemisiifolia L.
Annotated by C. L. Porter in 1968. RM-72454 George E. Osterhout 6874 12 9 1927 U.S.A. Colorado Larimer Gulch SE of Horsetooth. Flowering and Fruiting N N 35 RM 489868 So Rocky Mts RM 157220 Asteraceae Ambrosia artemisiifolia L. RM-72460 George E. Osterhout 7100 24 9 1928 U.S.A. Colorado Weld Windsor. Fruiting N N 36 RM 490009 So Rocky Mts RM 155153 Asteraceae Ambrosia artemisiifolia L. RM-91825 George E. Osterhout 7600 14 10 1924 U.S.A. Colorado Weld Windsor. Flowering and Fruiting N N 37 RM 490233 So Rocky Mts RM 155157 Asteraceae Ambrosia artemisiifolia L. RM-72160 George E. Osterhout 954 27 7 1896 U.S.A. Colorado Weld New Windsor. Fruiting N N 38 RM 490554 So Rocky Mts RM 312934 Asteraceae Ambrosia artemisiifolia L. RM-91721 George E. Osterhout s.n. 11 9 1912 U.S.A. Colorado Weld Windsor. Fruiting N N 39 RM 495756 So Rocky Mts RM 47333 Asteraceae Ambrosia artemisiifolia L. RM-94560 no collector 3279 27 8 1895 U.S.A. Colorado Larimer Fort Collins: College Farm. Fruiting N N 40 RM 496695 So Rocky Mts USFS 469687 Asteraceae Ambrosia artemisiifolia L. 1. Ambrosia artemisiifolia L.
Annotated by S. F. Blake. RM-94986 Paul L. Ginter 387 13 8 1941 U.S.A. Colorado Larimer 1 mi E of La Porte. Level, deep clay loam. 5300 ft. Fruiting N N 41 RM 497578 So Rocky Mts USFS 469696 Asteraceae Ambrosia artemisiifolia L. 1. Ambrosia artemisiifolia L.
Annotated by Jane W. Roller. RM-95475 Ralph K. Gierisch 1697 26 9 1952 U.S.A. Colorado Jefferson Denver Federal Center: Building 85. Roadside, disturbed soil, 2% east slope, deep loam. 5500 ft. Fruiting N N 42 RM 502962 So Rocky Mts RM 580767 Asteraceae Ambrosia artemisiifolia L. RM-98141 William A. Weber 18096 14 9 1990 U.S.A. Colorado Boulder Boulder: University of Colorado campus, along walkway leading down to Boulder Creek from Recreation Center. Flowering N N 43 RM 567820 SE WY 1984 RM 599469 RM0231566 Asteraceae Ambrosia artemisiifolia L. RM-104266 B. E. Nelson 11460 9 9 1984 U.S.A. Wyoming Laramie [location and coordinates withheld] Bottom of draw. 5600 ft. Fruiting N RM0231566 N 44 RM 574164 Dueholm 1978 RM 324243 RM0231564 Asteraceae Ambrosia artemisiifolia L. RM-104794 B. E. Nelson 2177 20 9 1978 U.S.A. Wyoming Campbell Powder River Basin: ca 47.5 air mi NE of Gillette, ca 5 air mi S of Montana on Trail Creek Road. Abundant in sandy clay in intermittant reservoir with Xanthium, Muhlenbergia, and Chenopodium glaucum. 3800 ft. 44.9336° N, 105.2011° W; uncertainty 700 ft. T57N R69W S18 NE1/4 44.9336 -105.2011 700 ft. N N Flowering and Fruiting N RM0231564 N 45 RM 574747 SE WY 1978 RM Asteraceae Ambrosia artemisiifolia L. RM-104854 B. E. Nelson 2383 26 9 1978 U.S.A. Wyoming Goshen Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Goshen Hole: ca 1.5 mi SW of Torrington, along south side of North Platte River. On river bank with Aster and Euthamia. 4100 ft. 42.051° N, 104.2133° W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO! T24N R61W S17 SE1/4 42.051 -104.2133 NAD 83 0 mi. N N Nat. Geog. TOPO! BEN Infrequent. N N 46 RM 579235 Bighorn Basin RM 661235 RM0231580 Asteraceae Ambrosia artemisiifolia L. RM-105252 B. E. Nelson 7022 11 8 1980 U.S.A. Wyoming Big Horn Bighorn Basin: Big Horn Canyon National Recreation Area: on the Pryor Mountain Wild Horse Range, ca 10.5 air mi NE of Lovell, near Horseshoe Bend. Marshy area and subirrigated area. 3800 ft. 44.9647° N, 108.2814° W; uncertainty 1 mi. T58N R95W S35 44.9647 -108.2814 1 mi. N RM0231580 N 47 RM 600089 Dueholm 1979 RM 333366 RM0231569 Asteraceae Ambrosia artemisiifolia L. RM-106704 Keith H. Dueholm 8638 3 8 1979 U.S.A. Wyoming Johnson Powder River Basin: Jack Moore Reservoir, along Boxelder Creek, ca 1.5 air mi E of south end of Lake De Smet. Flats around margin of holding pond, meadow along creek, gravelly roadside, hilly plains on clinker; along creek. 4500 ft. 44.4619° N, 106.69333° W; uncertainty 2 mi. T52N R82W S23; also S26 44.4619 -106.69333 2 mi. Flowering and Fruiting N RM0231569 N 48 RM 600155 Dueholm 1979 RM 333338 RM0231567 Asteraceae Ambrosia artemisiifolia L. RM-106706 Keith H. Dueholm 8704 3 8 1979 U.S.A. Wyoming Johnson Powder River Basin: Boxelder Creek, ca 5 air mi ENE of Lake De Smet. Meadows along creek, sandy plains, ridges; meadow. 4400 ft. 44.5189° N, 106.6397° W; uncertainty 1 mi. T53N R81W S32 44.5189 -106.6397 1 mi. Flowering N RM0231567 N 49 RM 600320 Dueholm 1979 RM 333339 RM0231568 Asteraceae Ambrosia artemisiifolia L. RM-106717 Keith H. Dueholm 8869 9 8 1979 U.S.A. Wyoming Sheridan Powder River Basin: along U.S. Hwy 87, ca 2 road mi NW of Ranchester. Wet ditches, meadows along small stream, tall grass prairie of big bluestem and slough grass, between railroad and wet ditch; prairie. 4800 ft. 44.9294° N, 107.2242° W; uncertainty 1 mi. T57N R86W S10 44.9294 -107.2242 1 mi. Flowering and Fruiting N RM0231568 N 50 RM 608243 Big Horn Mts RM 330173 RM0231589 Asteraceae Ambrosia artemisiifolia L. RM-106942 Ronald L. Hartman 10578 3 8 1979 U.S.A. Wyoming Sheridan Big Horn Mountains: ca 4.5 air mi SSW of Dayton. Gypsum Springs Formation and Chugwater red beds and roadside. 4800 ft. 44.8142° N, 107.31306° W; uncertainty 1 mi. T56N R87W S23 44.8142 -107.31306 1 mi. Buds N RM0231589 N 51 RM 641167 SE WY 1993 RM 599468 RM0231565 Asteraceae Ambrosia artemisiifolia L. RM-108415 B. E. Nelson 29717 23 9 1993 U.S.A. Wyoming Goshen Southern 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. Meadows along the creek. 4660 4780 ft. 41.5708° N, 104.1408° W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO! T19N R61W S36 41.5708 -104.1408 NAD 83 1 mi. N N Nat. Geog. TOPO! BEN Fruiting N RM0231565 N 52 RM 645005 SE WY 1994 RM 663688 RM0231579 Asteraceae Ambrosia artemisiifolia L. RM-108565 B. E. Nelson 34010 18 8 1994 U.S.A. Wyoming Laramie Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Chivington Draw W of Egbert or County Road 154 ca 10 air mi N of Egbert; ca 13.3 air mi NW of Pine Bluffs. Stony, gravelly channel in the valley. 5330 5380 ft. 41.31516° N, 104.25723° W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO! T16N R62W S36 NE1/4 41.31516 -104.25723 NAD 83 0 mi. N N Nat. Geog. TOPO! TB Flowering N RM0231579 N 53 RM 645007 SE WY 1994 RM 663687 RM0231578 Asteraceae Ambrosia artemisiifolia L. RM-108565 B. E. Nelson 34012 18 8 1994 U.S.A. Wyoming Laramie Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Chivington Draw W of Egbert or County Road 154 ca 10 air mi N of Egbert; ca 13.3 air mi NW of Pine Bluffs. Stony, gravelly channel in the valley. 5330 5380 ft. 41.31516° N, 104.25723° W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO! T16N R62W S36 NE1/4 41.31516 -104.25723 NAD 83 0 mi. N N Nat. Geog. TOPO! TB Flowering and Fruiting N RM0231578 N 54 RM 646493 RMHERB1 RM 600629 Asteraceae Ambrosia artemisiifolia L. RM-109000 Robert D. Dorn 6764 30 9 1995 U.S.A. Wyoming Laramie 1 mi SE of Cheyenne. Roadside with Helianthus and Oenothera. 6000 ft. 41.1248° N, 104.743° W T13N R66W S2 SE1/4 of SE1/4 41.1248 -104.743 Fruiting N N 55 RM 662117 Marriott 1982 RM 371549 RM0231581 Asteraceae Ambrosia artemisiifolia L. RM-110034 B. E. Nelson 9104 12 7 1982 U.S.A. Wyoming Crook Black Hills: along Humboldt Creek N of Colony, ca 35.5 air mi N of Sundance. Oak savannah. 3300 ft. 44.8867° N, 104.1375° W; uncertainty 1 mi. T57N R61W S35 44.8867 -104.1375 1 mi. Flowering N RM0231581 N 56 RM 666759 Marriott 1983 RM 371559 RM0231577 Asteraceae Ambrosia artemisiifolia L. RM-110604 Hollis Marriott 5198 28 7 1983 U.S.A. Wyoming Crook Black Hills: Redwater Creek; ca 2.2 air mi WNW of Beulah. Grassland; roadside. 3600 ft. 44.5557° N, 104.1226° W; uncertainty 0.5 mi. T53N R61W S25 NW1/4 44.5557 -104.1226 1 mi. Buds N RM0231577 N 57 RM 666908 Marriott 1983 RM 371558 RM0231586 Asteraceae Ambrosia artemisiifolia L. RM-105598 Hollis Marriott 5350 2 8 1983 U.S.A. Wyoming Crook Black Hills: Goldie Divide near jct of Goldie and New Haven roads, ca 5 air mi NW of Hulett. Grassland, reservoir margins. 4500 ft. 44.7225° N, 104.69028° W; uncertainty 1 mi. T55N R65W S29 44.7225 -104.69028 1 mi. Flowering N RM0231586 N 58 RM 667224 Marriott 1983 RM 371557 RM0231583 Asteraceae Ambrosia artemisiifolia L. RM-24950 Hollis Marriott 5671a 22 8 1983 U.S.A. Wyoming Crook Black Hills: headwaters of Bitter Creek, ca 2.5 air mi WNW of Alva. Grassland. 4100 ft. 44.7111° N, 104.4845° W T55N R64W S36 NE1/4 44.7111 -104.4845 1 mi. Flowering N RM0231583 N 59 RM 667225 Marriott 1983 RM 371557 Asteraceae Ambrosia artemisiifolia L. RM-24950 Hollis Marriott 5671a 22 8 1983 U.S.A. Wyoming Crook Black Hills: headwaters of Bitter Creek, ca 2.5 air mi WNW of Alva. Grassland. 4100 ft. 44.7111° N, 104.4845° W T55N R64W S36 NE1/4 44.7111 -104.4845 1 mi. Flowering and Fruiting N N 60 RM 667267 Marriott 1983 RM 371556 RM0231576 Asteraceae Ambrosia artemisiifolia L. RM-24954 Hollis Marriott 5712 24 8 1983 U.S.A. Wyoming Crook Black Hills: Houston Creek where it turns south (near Harvey Divide), ca 10 air mi W of Sundance. Grassland, on dirt road. 4600 ft. 44.4042° N, 104.5887° W T51N R64W S18 SE1/4 44.4042 -104.5887 1 mi. N N Fruiting N RM0231576 N 61 RM 667336 Marriott 1983 RM 371555 RM0231582 Asteraceae Ambrosia artemisiifolia L. RM-24954 Hollis Marriott 5781 24 8 1983 U.S.A. Wyoming Crook Black Hills: Houston Creek where it turns south (near Harvey Divide), ca 10 air mi W of Sundance. Grassland, reservoir margins. 4600 ft. 44.4042° N, 104.5887° W T51N R64W S18 SE1/4 44.4042 -104.5887 1 mi. N N Flowering and Fruiting N RM0231582 N 62 RM 667362 Marriott 1983 RM 371554 RM0231574 Asteraceae Ambrosia artemisiifolia L. RM-24955 Hollis Marriott 5807 24 8 1983 U.S.A. Wyoming Crook Black Hills, Bear Lodge Mountains, head of Rocky Ford Creek, Government Valley Road, ca 3 air mi NNE of Sundance. Grassland; roadside. 4800 ft. 44.4495° N, 104.3457° W T52N R62W S31 SW1/4 44.4495 -104.3457 1 mi. Flowering and Fruiting N RM0231574 N 63 RM 670400 Marriott 1984 RM 371553 RM0231584 Asteraceae Ambrosia artemisiifolia L. RM-105661 Hollis Marriott 8729 Dennis Horning 8 8 1984 U.S.A. Wyoming Weston Black Hills: Elk Mountain area, Mix Spring, ca 14.5 air mi SSE of Newcastle. Draw below spring. 4800 ft. 43.6767° N, 104.0705° W; uncertainty 1 mi. T43N R60W S28 43.6767 -104.0705 1 mi. Flowering and Fruiting N RM0231584 N 64 RM 670603 Marriott 1984 RM 371552 RM0231573 Asteraceae Ambrosia artemisiifolia L. RM-105665 Hollis Marriott 8925 10 8 1984 U.S.A. Wyoming Weston [location and coordinates withheld] Grassland, in draw between limestone sinkhole and reservoir. 5850 ft. Flowering N RM0231573 N 65 RM 670959 Marriott 1984 RM 371551 RM0231585 Asteraceae Ambrosia artemisiifolia L. RM-105674 Hollis Marriott 9268 21 8 1984 U.S.A. Wyoming Crook [location and coordinates withheld] Big sagebrush-grassland, around reservoir. 3200 ft. Flowering N RM0231585 N 66 RM 670978 Marriott 1984 RM 371550 RM0231575 Asteraceae Ambrosia artemisiifolia L. RM-105674 Hollis Marriott 9285 21 8 1984 U.S.A. Wyoming Crook [location and coordinates withheld] In draw with oak and green ash. 3200 ft. Flowering N RM0231575 N 67 RM 671598 Dueholm 1978 RM 324246 RM0231570 Asteraceae Ambrosia artemisiifolia L. RM-106537 Keith H. Dueholm 5000 26 7 1978 U.S.A. Wyoming Crook Powder River Basin: ca 8 air mi NNE of New Haven. Bur oak savannah, mottes of oak, sandy grassland, eroded, loose shaley ridge with oak and pine; plains, near road. 3800 ft. 44.8567° N, 104.82056° W; uncertainty 1 mi. T56N R66W S7; also S8 44.8567 -104.82056 1 mi. Flowering N RM0231570 N 68 RM 672419 WY Black Hills RM 304791 RM0231571 Asteraceae Ambrosia artemisiifolia L. RM-111408 Ronald G. Schreibeis AL-127 31 7 1976 U.S.A. Wyoming Crook Ca 5 mi NW of Aladdin. Rare to occasional. 3700 3800 ft. 44.697° N, 104.2231° W; uncertainty 0.25 mi. T54N R61W S6 NE1/4 of NE1/4 44.697 -104.2231 0 mi. Flowering and Fruiting N RM0231571 N 69 RM 775170 Missouri Plateau RM 154304 Asteraceae Ambrosia artemisiifolia L. RM-132176 O. A. Stevens s.n. 24 8 1933 U.S.A. North Dakota Cass Fargo. Roadside. Flowering N N 70 RM 775171 Missouri Plateau RM 39139 Asteraceae Ambrosia artemisiifolia L. RM-132177 J. Lunell s.n. 10 9 1902 U.S.A. North Dakota Ward Minot. Roadsides. Flowering N N 71 RM 775172 Missouri Plateau RM 389376 Asteraceae Ambrosia artemisiifolia L. RM-123411 Jerry Pieper 480 27 8 1968 U.S.A. North Dakota Sargent Tewaukon National Wildlife Refuge: north side of Pool 5, 5 mi S of Cayuga. Upland area. Flowering N N 72 RM 775173 Missouri Plateau RM 74270 Asteraceae Ambrosia artemisiifolia L. RM-131677 no collector 219 25 7 1911 U.S.A. North Dakota Nelson Tolna. Sandy hills. Buds N N 73 RM 775174 Missouri Plateau RM 226821 Asteraceae Ambrosia artemisiifolia L. RM-132178 Harry Hapeman s.n. 30 8 1941 U.S.A. Nebraska Kearney Minden. Buds N N 74 RM 775237 Missouri Plateau RM 121972 Asteraceae Ambrosia artemisiifolia L. RM-132227 J. W. Blankinship s.n. 9 9 1900 U.S.A. Montana Phillips Malta. Flowering and Fruiting N N 75 RM 775238 Missouri Plateau USFS 469676 Asteraceae Ambrosia artemisiifolia L. RM-132228 E. J. Woolfolk W-123 15 10 1937 U.S.A. Montana Custer US Range Livestock Experiment Station: Hogback, Pasture E. Bank, northwest slope; sandy soil. 2450 ft. Flowering N N 76 RM 775239 Missouri Plateau USFS 469690 Asteraceae Ambrosia artemisiifolia L. RM-27684 Frank F. Liebig 317 10 7 1929 U.S.A. Montana Flathead Flathead National Forest: Coram Ranger Station. Level ground; sandy and coarse gravel soil; pasture; with shepherds purse and snowberry; open waste places. 3200 ft. 48.5475° N, 113.9848° W; uncertainty 1 mi. 48.5475 -113.9848 1 mi. Quite common. Flowering N N 77 RM 789189 Charboneau 2010 RM Asteraceae Ambrosia artemisiifolia L. RM-129450 B. E. Nelson 81290 16 9 2010 U.S.A. Montana Valley Along Porcupine Creek at Roosevelt Trail and Fort Peck Indian Reservation, ca 5 air mi N of Nashua. Gravel and sandbars on the flood plain. 2130 ft. 48.2061° N, 106.3837° W; NAD 83, GPS reading T28N R41E S2 SE1/4 48.2061 -106.3837 NAD 83 GPS reading Flowering and Fruiting N 78 RM 792708 Charboneau 2010 RM Asteraceae Ambrosia artemisiifolia L. RM-128033 Joseph L. M. Charboneau 3251 12 8 2010 U.S.A. Montana Valley Charles M. Russell National Wildlife Refuge: Carpenter Coulee, S of Harper Ridge Road, ca 9 air mi SSW of Halfpint Reservoir, ca 41.5 air mi SW of Glasgow. Moist areas of clay soil in draw bottoms. 2580 2770 ft. 47.7474° N, 107.1677° W; NAD 83, GPS reading T23N R35E S24 NE1/4; also S13 SE1/4 47.7474 -107.1677 NAD 83 GPS reading Flowering and Fruiting N 79 RM 822169 Charboneau 2011 RM Asteraceae Ambrosia artemisiifolia L. RM-142143 Joseph L. M. Charboneau 6621 3 7 2011 U.S.A. Montana Valley Uhlan 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. Moist coulee bottoms. 2550 2700 ft. 48.3321° N, 106.4504° W to 48.3246° N, 106.4493° W; NAD 83, GPS reading T30N R41E S30 NW1/4 48.3321 -106.4504 NAD 83 GPS reading Flowering N 80 RM 823421 Charboneau 2011 RM Asteraceae Ambrosia artemisiifolia L. RM-142294 Joseph L. M. Charboneau 7874 19 7 2011 U.S.A. Montana Phillips American 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. Moist coulee bottom. 2560 2620 ft. 47.9455° N, 108.0445° W; NAD 83, GPS reading T25N R29E S6 SW1/4 47.9455 -108.0445 NAD 83 GPS reading Flowering and Fruiting N 81 RM 823956 Charboneau 2011 RM Asteraceae Ambrosia artemisiifolia L. RM-142330 Joseph L. M. Charboneau 8407 31 7 2011 U.S.A. Montana Phillips Bennett Lake, just W of intersection of Content Road and Sun Prairie Road, ca 5.5 air mi SSW of Drabbels Reservoir, ca 13.5 air mi N of Beaver Creek, ca 11 air mi SSE of Malta. Moist areas around edge of reservoir. 2600 2610 ft. 48.2141° N, 107.7905° W; NAD 83, GPS reading T28N R30E S1 NE1/4 48.2141 -107.7905 NAD 83 GPS reading Flowering N 82 RM 824593 Charboneau 2011 RM Asteraceae Ambrosia artemisiifolia L. RM-142392 Joseph L. M. Charboneau 8744 4 8 2011 U.S.A. Montana Valley Glasgow Base Ponds, W of Mont Hwy 24, ca 4.5 air mi W of Porcupine Creek, ca 3.5 air mi NW of St. Marie; ca 18 air mi N of Glasgow. Moist grasslands surrounding pond with willows, Russian olive, and snowberry thickets. 2720 2740 ft. 48.4481° N, 106.5791° W; NAD 83, GPS reading T31N R39E S18 NE1/4 48.4481 -106.5791 NAD 83 GPS reading Flowering N 83 RM 825209 Charboneau 2011 RM Asteraceae Ambrosia artemisiifolia L. RM-142440 Joseph L. M. Charboneau 9359 11 8 2011 U.S.A. Montana Phillips McNeil Slough Waterfowl Production Area: Milk River, ca 1 air mi N of Hewitt Lake, ca 13.5 air mi NW of Saco; ca 20 air mi NE of Malta. Open, filled-in slough. 2210 2240 ft. 48.5557° N, 107.5889° W to 48.5591° N, 107.5878° W; NAD 83, GPS reading T32N R32E S5 SW1/4 48.5557 -107.5889 NAD 83 GPS reading Buds N 84 RM 899327 OConner 2017 RM Asteraceae Ambrosia artemisiifolia L. 1. Ambrosia artemisiifolia L.. RM-448374 Crista L. O'Conner 5043 16 8 2017 U.S.A. Idaho Idaho Clearwater Mountains: Middle Fork Clearwater River, ca 3 1/4 air mi E of Syringa along U.S. Hwy. 12. Disturbed roadside pull-out. 1455 ft. 46.1393° N, 115.6627° W; WGS 84, , GPS reading T32N R6E S2 SE1/4 46.1393 -115.6627 WGS 84 GPS reading Flowering N