: 1.21 $2024-03-29T08:42:15-7:003.237.87.69searchRMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7232Timothy W. Chumley Randy Pratt1997102275U.S.A.ColoradoEl PasoEast-central Colorado: Mosquito Range to Plains: at scenic overlook on I-25, ca 1/3 air mi E of U. S. Air Force Academy airport, ca 9 air mi N of Colorado Springs.-104.80738.9742006Weedy, highly disturbed ground with sandy soils along roadway. Phenology: fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.57945B. 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 slopes, banks, and flats along stream channel. Phenology: flowering.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.58150B. 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: flowering.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.3155Peter J. Ebertowski2002818230U.S.A.WyomingCampbellThunder Basin National Grassland and Vicinity: playa and grassland ca 1.5 air mi N of North Prong Little Thunder Creek on County Road 89, ca 8 air mi E of Wright; ca 38 air mi SSE of Gillette.-105.329243.742614391448Sandy area near oil well and tank. Phenology: flowering.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.8481Peter J. Ebertowski2003822234U.S.A.WyomingConverseThunder Basin National Grassland and Vicinity: Antelope Creek, ca 0.5 mi W of its confluence with Wildcat Creek, on Forest Road 949, ca 28 air mi SE of Wright; ca 51 air mi NNE of Douglas.-105.110643.441813171341Deep, fine sand above first stream terrace. Phenology: flowering & fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.63708B. E. Nelson James F. Fowler2004925269U.S.A.ArizonaCoconinoCoconino National Forest: along I-17 from James Canyon S ca 1/4 mi, ca 12 air mi S of Flagstaff.-111.685635.04072012Roadside and right of way. Phenology: fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.80057Ronald L. Hartman2004823236U.S.A.ArizonaCoconinoCoconino National Forest: U.S. Hwy 180, ca 5 air mi NW of Flagstaff center, between mile posts 220-221.-111.686235.24562195Highway right of way including ponderosa pine margin. Phenology: flowering & fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.80212Ronald L. Hartman2004829242U.S.A.ArizonaCoconinoCoconino National Forest: County Road (Forest Hwy) 3, just SW of Mormon Lake Ranger District Office, for 0.7 air mi SW of coordinate.-111.65635.15262134Ponderosa pine woodland and adjacent highway right of way. Phenology: flowering & fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.80344Ronald L. Hartman James F. Fowler2004828241U.S.A.ArizonaCoconinoCoconino National Forest: Sterling Canyon, last mile of Manzanita Trail to Manzanita Campground and down road to Encinoso Picnic Area.-111.74734.936614411478Ponderosa pine slopes. Phenology: flowering & fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.66742B. E. Nelson James F. Fowler2005916259U.S.A.ArizonaCoconinoKaibab National Forest: Kaibab Plateau: between U.S. Hwy 89A and House Rock Canyon in the vicinity of the scenic overlook, ca 8-8.5 air mi E of Jacob Lake; ca 29.5-30 air mi SE of Fredonia.-112.058636.722217681844Steep slopes above the canyon with limy ledges. Phenology: flowering.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.67078B. E. Nelson2005921264U.S.A.ArizonaApacheApache National Forest: mesa on east side of Murray Basin, ca 2 air mi E of Flat Top, ca 4.5 air mi SE of Springerville.-109.228334.089922862329Weedy flats below the slopes. Phenology: fruiting.RMRM818653 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.33290Erwin F. Evert1997622173U.S.A.WyomingHot SpringsBighorn Basin: Public Fishing Access Site along the east side of the Big Horn River, just NE of Lucerne, 7 mi N of Thermopolis.1280Weedy, riparian area in sandy soil with Bromus tectorum, Malcolmia africana, Sporobolus airoides, and Centaurea repens. Phenology: vegetative only.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.69646B. E. Nelson James F. Fowler2006823235U.S.A.ArizonaCoconinoCoconino National Forest: northwest edge of Black Bill Park just E of U.S. Hwy 89 on Forest Road 776, ca 10.5 air mi NE of Flagstaff.-111.544835.32922073Roadside and adjacent disturbed areas. Phenology: flowering.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.69788B. 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.-111.828435.24262173Cinder roadbank and pavement edge. Phenology: flowering & fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.70062B. E. Nelson James F. Fowler, Brian Reif2006825237U.S.A.ArizonaNavajoSitgreaves National Forest: Mogollon Plateau: Wildcat Canyon above Forest Road 504, ca 10.5 air mi NW of Heber; ca 25.5 air mi S of Winslow.-110.728434.540219721993Canyon bottom, walls, and slopes on limestone. Phenology: flowering & fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.70126B. E. Nelson James F. Fowler, Brian Reif2006825237U.S.A.ArizonaNavajoSitgreaves National Forest: Mogollon Plateau: above Daze Canyon on Forest Road 504, ca 10 air mi NW of Heber; ca 26 air mi S of Winslow.-110.716634.53272012Disturbed area around limestone quarry. Phenology: flowering.RMRM794544 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.2632Jeanette Flaig2003814226U.S.A.ColoradoRio GrandeEastern San Juan Mountains: Rio Grande National Forest: Colo Hwy 149 N, ca 2.5 air mi N of South Fork.-106.695237.71492548Along highway. Phenology: flowering & fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.70296B. E. Nelson James F. Fowler2006828240U.S.A.ArizonaCoconinoCoconino National Forest: at the intersection of U.S. Hwy 89 and Forest Road 418-420 just E of the base of San Francisco Mountain, ca 12.5 air mi NNE of Flagstaff.-111.576335.37232213Roadside, barrow pit, and adjacent ponderosa pine savana. Phenology: flowering.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.83720Ronald L. Hartman2006912255U.S.A.ArizonaCoconinoCoconino National Forest: Forest Road 514, 7.5 air mi NE of Kendrick Park.-111.642535.467221952225Pinyon-juniper woodland on cinder substrate. Phenology: flowering & fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.84743Ronald L. Hartman2006921264U.S.A.ArizonaNavajoSitgreaves National Forest: Black Canyon along Forest Road 86, ca 3 air mi SW of Heber.-110.626734.39032073Limestone outcrop with sandy soil below. Phenology: fruiting.RMUSFS469695 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1265Charles P. Pase1961819231U.S.A.ArizonaApacheApache National Forest: 1 mi W of Eagar.-109.2673934.110992164Shortgrass community on a 3% north slope with Bouteloua gracilis and Juniperus monosperma. Phenology: flowering & fruiting.RMUSFS469637 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.PA-42Clifford E. Hulbert192096250U.S.A.New MexicoGrantGila National Forest: Pinos Altos Ranger Station.-108.2215932.86352134Phenology: vegetative only.RMRM736782 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.10894D. Seigler197832180U.S.A.ArizonaPimaWest edge of Tucson.-111.020432.21273731Phenology: flowering.RMRM133321 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1325Earl F. Castetter1932920264U.S.A.New MexicoBernalilloAlbuquerque.-106.6521935.084614931676Low waste place. Phenology: flowering & fruiting.RMRM155484 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.E. O. Wooton19071011284U.S.A.New MexicoDona AnaMesilla Valley.-106.6436931.918091158Phenology: flowering.RMRM58335 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.E. O. Wooton189510274U.S.A.New MexicoDona AnaMesilla Valley.-106.703932.154611281798Phenology: flowering.RMRM666207 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7873Amy J. Roderick Kevin J. Taylor199886218U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Ferris Mountains: Sand Creek Canyon at east end of range, ca 17 air mi N of Independence Rock.-107.123842.23851981Creek and adjacent sand dunes. Phenology: flowering.RMRM949632 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.10848Jill E. Larson2006822234U.S.A.New MexicoRio ArribaCarson National Forest and Vicinity: Canada de los Comanches along Taos County line, ca 2 air mi SE of Servilleta Plaza and ca 6 air mi NW of Taos Junction.-105.953436.41112126Sandy soils with Gutierrezia sarothrae, Chrysothamnus nauseous, Heterotheca villosa, Bouteloua gracilis, and Sporobolus species. Phenology: flowering.RMRM949631 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.83490Ronald L. Hartman2006816228U.S.A.New MexicoTaosCarson National Forest and Vicinity: cut and fill along old Chili Line Railroad Grade and adjacent roadside along U.S. 285.-105.974436.90332500Disturbed areas. Phenology: flowering.RMUSFS469749 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.431Jacob D. Schoeller19231031304U.S.A.New MexicoDona AnaJornada Range Reserve: 3.5 mi NE of Middle Well.-106.750132.715691356Level, pure sand; in mesquite with shadscale, sage, and scrapweed; spotted occurrence on sand hills. Phenology: fruiting.RMRM803949 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.57866B. E. Nelson2002723204U.S.A.WyomingWashakieBighorn Basin: along East Fork Nowater Creek, ca 3 air mi W of Joe Henry Fork, ca 11.5 air mi SE of Worland.-107.77343.923513101317Silt/sand bars, banks along stream channel, and adjacent sandy flats with scattered cottonwoods. Phenology: flowering.RM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.6553Margarette J. Lyon Laura Cosse199482214U.S.A.ColoradoMesaSan Miguel and Lower Dolores River Drainages: along Colo Hwy 141 on Unaweep Divide.-108.556738.86442134With pinyon, juniper, big sage, and rabbitbrush. Phenology: flowering & fruiting.RMUSFS469748 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.21Leon C. Hurtt191591244U.S.A.New MexicoDona AnaJornada Range Reserve: 1 mi S of Middle Well.-106.779632.67831310Level, dry, sandy loam; with grama grass and sunflower. Phenology: flowering.RMUSFS469634 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.223M. W. Talbot1915921264U.S.A.New MexicoCatronDatil National Forest: Largo, near National Forest boundary.-108.548534.22972195Deep, slightly sandy soil beneath cottonwood trees; abundant over small areas; typical of flat canyon bottoms. Catron/Socorro counties. Phenology: flowering.RMUSFS469636 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.30M. W. Talbot19221030303U.S.A.ArizonaGilaCrook National Forest: Edge of Globe.-110.792533.403591564Weed-browse community in gravelly loam on a 5 degree south slope with weeds, mesquite and browse; common; widely distributed. Phenology: vegetative only.RM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.9099Lynn Marie Moore Marie Rambo1996918262U.S.A.ColoradoSan MiguelUpper Dolores River Drainage and Adjacent Areas: Colorado Hwy 141, mouth of Disappointment Valley. ca. 20 air miles N of Dove Creek Colorado.-108.874238.03141750Desert Shrub community. Phenology: flowering & fruiting.RM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.9111Lynn Marie Moore Marie Rambo1996918262U.S.A.ColoradoSan MiguelUpper Dolores River Drainage and Adjacent Areas: ca 18 air mi N of Dove Creek, W of Hwy 141.-108.910938.01692000Pinyon Juniper, sandy soil and cap rock. Phenology: flowering & fruiting.RMRM49541 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.4148Marcus E. Jones184494248U.S.A.New MexicoBernalilloAlbuquerque.-106.6521935.084614931676RMRM49567 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.4251Marcus E. Jones1884917261U.S.A.ArizonaCochiseBowie.-109.486531.32591158Phenology: vegetative only.RMRM576108 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.16902N. Duane Atwood Judy Atwood199194247U.S.A.ArizonaCoconinoJunction of I-40 and Walnut Canyon Road.-111.5173935.20852042Phenology: flowering.RMRM196426 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.Paul Schallert194391244U.S.A.ArizonaCoconinoFlagstaff: Navajo Ordinance Depot.-111.7413935.183592195Mesa. Phenology: flowering & fruiting.RMRM196445 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.Paul Schallert194392245U.S.A.ArizonaCoconinoFlagstaff: Navajo Ordnance Depot.-111.7413935.183592195Mesa. Phenology: flowering & fruiting.RMUSFS469747 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.182Rudolph L. Hensel1918928271U.S.A.ArizonaPimaSanta Rita Range Reserve: west side of pasture #1.-110.8789731.843841250Slender grama browse community in deep sandy loam on a 5% to west slope with foothill gramas; common to abundant; distributed over entire reserve. [Found in a variety of soils in types extending from the lower to the higher elevations] (annotation). Phenology: flowering.RMRM366177 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.547Andrew Warren1983718199U.S.A.WyomingFremontWind River Basin: west side of Boysen Reservoir, ca 4 air mi W of Shoshone.-108.192343.23641457Common on disturbed sandy slopes below sandstone outcrops with Bromus, Oryzopsis, and Artemisia cana. Phenology: flowering & fruiting.RMRM2825 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1190Aven Nelson189499252U.S.A.WyomingSweetwater River.Phenology: fruiting.RMRM3741 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.626Aven Nelson1894722203U.S.A.WyomingPlatteWillow Creek Hills.-104.881842.55871463Phenology: flowering.RMRM2895 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.707Aven Nelson189485217U.S.A.WyomingFremontBig Wind River.-108.961843.2221707Phenology: flowering & fruiting.RMRM7620 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.Aven Nelson1896921265U.S.A.WyomingAlbanyLaramie.-105.584441.31332195Phenology: fruiting.RMRM706379 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.2076Bonnie Heidel2001714195U.S.A.WyomingBig HornYellowtail Wildlife Management Area: N of road.-108.261244.87921121Uncommon on loose sands, occurs with Sporobolus cryptandrus, Chrysothamnus linifolius. Phenology: flowering & fruiting.RMRM726777 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1097C. A. Popolizio D. Hazlett1996829242U.S.A.WyomingPlatteCamp Guernsey: ca 0.2 km SW of Guernsey Reservoir, near Stokes Siding.-104.831742.31511370Scattered on disturbed site within Pinus ponderosa-Juniper woodland on gentle to moderate slopes of gravelly loamy sand with Pinus ponderosa, Juniperus scopulorum, Carduus nutans, Ambrosia psilostachya, and Bromus tectorum. Phenology: flowering & fruiting.RMRM764922 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1054D. Hazlett C. A. Popolizio1996827240U.S.A.WyomingPlatteCamp Guernsey: ca 0.1 km E of North Platte River, ca 0.4 km N of U.S. Hwy 26, and ca 1.6 km S of Hartville Canyon.-104.752442.28111330Very infrequent in disturbed mixed grass prairie on level to steep slopes of gravelly loamy sand with Opuntia polyacantha, Rhus trilobata, Thelesperma megapotamicum, Bouteloua gracilis, and Bromus tectorum. Phenology: flowering.RMRM189209 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1045Volney H. Jones193997250U.S.A.ArizonaNavajoAwatovi2134Thin sand on bedrock; common. Phenology: flowering.RMRM305097 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.572W. Hess D. B. Dunn and Spellman1965831243U.S.A.New MexicoSocorroAtomic Bomb Test Site: east transect at 1400 feet.-106.475633.6769West-facing alluvial soils. Phenology: flowering & fruiting.RMRM155477 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7518George E. Osterhout1931817229U.S.A.WyomingGoshenS of Torrington.-104.256641.937313101493On the plains. Phenology: flowering.RMUSFS469633 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.M-38Walter G. Mann1927927270U.S.A.ArizonaCoconinoKaibab National Forest: 2 mi N of Kane [Cane].-111.979636.589191676Sagebrush grass community in gravel soil on a flat slope with grama; sparsely abundant; generally distributed. Phenology: flowering.RMRM382676 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.10514Hollis Marriott1986729210U.S.A.WyomingFremontLysite Badlands: eroded slopes draining N into Badwater Creek.-107.747743.26471646Badlands slope on sandy soil. Phenology: flowering & fruiting.RMRM189348 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.Robert E. Pfadt194291244U.S.A.WyomingConverseDouglas.-105.373642.76181463Phenology: fruiting.RMRM319636 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.3411Robert D. Dorn1979830242U.S.A.WyomingGoshenCa 10 road mi N of Lingle along U.S. Hwy 85.-104.294742.26971341Sandy plains with Helianthus and Euphorbia. Phenology: flowering & fruiting.RMRM594859 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.5762Robert D. Dorn199485217U.S.A.WyomingPlatte8 mi SSE of Glendo.-104.9842.39881402Sandy wash with Euphorbia and Eragrostis. Phenology: fruiting.RMRM643033 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.8115Robert D. Dorn199993246U.S.A.WyomingNiobraraMule Creek Junction.-104.217543.37661158Sandy roadside with Melilotus and Helianthus. Phenology: flowering & fruiting.RMRM741249 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.9718Robert D. Dorn2003828240U.S.A.WyomingGoshenFort Laramie National Historic Site.-104.56542.2133331310Roadside with Artemisia filifolia and Chamaesyce. Common; prostrate. Phenology: flowering.RMRM354761 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.3243Thomas W. Nelson Jane P. Nelson, James L. Nelson, and Kathy M. Nelson1976828241U.S.A.WyomingFremontWyo Hwy 20/26; ca 5 mi E of Shoshone.-108.024743.22181524Growing on dry, sandy soil. Phenology: fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.17158Walter Fertig1996820233U.S.A.WyomingNatronaNorth Platte River Valley: west side of North Platte River at Alcova, between Alcova Reservoir and Gray Reef Reservoir, ca 0.5 mi SE of Wyo Hwy 220; ca 27 air mi SW of Casper.-106.727742.55491615Dry, sandy gravel knolls and low ridges at edge of Sarcobatus clay flats. Phenology: flowering.RMRM386877 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.5568June Haines1985816228U.S.A.WyomingFremontHaines Farm, ca 9 air mi W of Riverton on U.S. Hwy 26.-108.527743.09161639Lane between horse pasture and big field. Phenology: flowering & fruiting.RMRM387715 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.5568June Haines1985816228U.S.A.WyomingFremontHaines Farm, ca 9 air mi W of Riverton on U.S. Hwy 26.-108.527743.09161639Lane between horse pasture and big field. Phenology: flowering & fruiting.RMRM319636 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.3411Robert D. Dorn1979830242U.S.A.WyomingGoshenCa 10 road mi N of Lingle along Wyo Hwy 85.-104.294742.26971341Sandy plains with Helianthus and Euphorbia. Phenology: flowering & fruiting.RMRM594859 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.5762Robert D. Dorn199485217U.S.A.WyomingPlatte8 mi SSE of Glendo along-104.9842.39881402Sandy wash with Euphorbia and Eragrostis. Phenology: fruiting.RMRMRS Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1852Charles P. Pase1971918261U.S.A.ArizonaApacheOff Apache National Forest; near St. Johns and Lyman Lake; old U.S. 66; roadside.1829Phenology: flowering & fruiting.RMRMRS Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1043Hendricks Boud1931103276U.S.A.New MexicoTaos3 miles southwest of Taos Junction.2286Phenology: fruiting.RMRM70088 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.370S. S. Visher1910817229U.S.A.South DakotaHardingGrand River, Buffalo.-103.520245.5719853871Sandy flood plain. Phenology: flowering.RMRM70087 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.371S. S. Visher1910817229U.S.A.South DakotaHardingGrand River, Buffalo.-103.520245.5719853871Sandy flood plain. Phenology: flowering.RMRM76245 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.667S. S. Visher191299253U.S.A.South DakotaHardingPhenology: flowering.RMUSFS469742 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1043Barnard A. Hendricks W. F. Bond1931103276U.S.A.New MexicoRio Arriba13 mi SW of Taos Junction.-106.0550936.27171875Sandy soil. Phenology: flowering & fruiting.RMRM278200 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.10131C. L. Porter1965910253U.S.A.ColoradoAlamosaNear Great Sand Dunes National Monument.2317In loose sand, with Sarcobatus. Phenology: flowering.RMUSFS469635 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.381Clarence E. Taylor191791244U.S.A.Coloradono countySan Isabel National Forest.2399Sandy soil. Phenology: flowering.RMRM736806 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.12136D. Seigler1985810222U.S.A.ColoradoWashington3 mi W of Anton.Phenology: flowering & fruiting.RMRM736808 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.DS-12417D. Seigler J. Kramer1985925268U.S.A.ColoradoKit Carson18 mi N of Seibert.Phenology: flowering & fruiting.RMRM736794 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.DS-12421D. Seigler J. Kramer1985725206U.S.A.ColoradoEl PasoNW of Yoder: 4.4 mi N of CO Hwy 94.Phenology: flowering.RMRM127967 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.572Earl F. Castetter1931820232U.S.A.New MexicoSandovalJemez Springs.-106.691435.76951890Roadside. Phenology: flowering.RMRM29974 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.653F. K. Vreeland1900910253U.S.A.ColoradoHuerfanoIn Huerfano Valley, near Gardner.2134Sandy creek bottom. Phenology: flowering.RMRM155440 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.659F. K. Vreeland1900910253U.S.A.ColoradoHuerfanoIn Huerfano Valley, near Gardner.2134Sandy creek bottom. Phenology: flowering.RMRM132860 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.12534Francis Ramaley1930810222U.S.A.ColoradoAlamosaSan Luis Lakes.Phenology: flowering.RMRM132862 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.14035Francis Ramaley1932813226U.S.A.ColoradoAdamsAlamosaPhenology: flowering.RMRM140119 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.14519Francis Ramaley1934912255U.S.A.ColoradoWeldRoggen.Sand hill. Phenology: flowering.RMRM155444 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.3419George E. Osterhout1906822234U.S.A.ColoradoChaffeeSalida.Phenology: flowering.RMRM70293 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.3419George E. Osterhout1906820232U.S.A.ColoradoChaffeeSalida.Phenology: flowering.RMRM155442 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.4819George E. Osterhout1912828241U.S.A.ColoradoSedgwickJulesburg.Phenology: flowering.RMRM155483 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.956George E. Osterhout1896813226U.S.A.ColoradoLoganSterling.Phenology: flowering.RMRM47335 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.3259J. H. Cowen189793246U.S.A.ColoradoDeltaDelta.Phenology: flowering.RMRM126651 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.71Lois B. Payson1913929272U.S.A.New MexicoBernalilloBetween Socorro and Santa Fe.Flats. Phenology: flowering.RMUSFS469639 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.4M. W. Talbot1923823235U.S.A.New MexicoRio ArribaNear Espanola; Santa Clara Indian Reservation; District 3.-106.1384935.981791676Level, shifting sands, with Cenchrus pauchiflorus. Phenology: vegetative only.RMRM580499 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.18387Ronald C. Wittmann William A. Weber199196249U.S.A.ColoradoLas AnimasCorner of Road T.Sandy soil between fence and road. Phenology: flowering.RMRM718263 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.11155Robert Merril King Robert M. Garvey1999916259U.S.A.ColoradoWeldCounty Road 27, ca 1 mi N of Brighton.-104.82666740.0058331523Phenology: flowering & fruiting.RMRM41111 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.75T. D. A. Cockerell829242U.S.A.New MexicoColfaxRaton.-104.440536.90219512500Phenology: flowering.RMRM576108 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.16902N. Duane Atwood Judy Atwood199194247U.S.A.ArizonaCoconinoJunction of I-40 and Walnut Canyon Road.Phenology: flowering.RMRM670732 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.39723B. E. Nelson1996811224U.S.A.WyomingSweetwaterSouth-central Wyoming: along BLM Road 4412 at the edge of Skull Creek Rim above Skull Creek, ca 55 air mi SE of Rock Springs; ca 35 air mi W of Baggs.-108.344141.06952109Sand dune with greasewood and rabbitbrush. Phenology: flowering & fruiting.RMRM670733 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.2762Beth 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.-107.539641.418122312346Spring area. Phenology: flowering.RMRM661237 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.13574B. E. Nelson1987618169U.S.A.WyomingHot SpringsBighorn Basin: along Sand Draw in the vicinity of Sand Draw and Voss Springs, ca 5 air mi WNW of Kirby, ca 12.5 air mi NNW of Thermopolis.-108.281243.82111371Second bench above the stream. Phenology: fruiting.RMRM661236 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.13945B. E. Nelson1987626177U.S.A.WyomingParkBighorn Basin: Along Wyo Hwy 114, ca 3 air mi NNW of Garland, ca 6 air mi NE of Powell.-108.6830644.81921371Clay wash. Phenology: fruiting.RMRM317776 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.2542B. E. Nelson1978928271U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: Goshen Hole: UW Experimental Farm, ca 2.3 air mi NW of Torrington, ca 7.3 air mi SE of Lingle on U.S. Hwy 26.-104.220842.7931250In sandy soil along irrigation ditch at end of hay field with Setaria and Eragrostis. Infrequent. Phenology: fruiting.RMRM661238 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.8645B. E. Nelson1981723204U.S.A.WyomingHot SpringsBighorn Basin: along the Big Horn River, ca 7 air mi NNE of Thermopolis; ca 1 air mi ENE of Lucerne.-108.156543.74681310Sandy flats above the river. Phenology: fruiting.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.5568June Haines1985816228U.S.A.WyomingFremontHaines Farm, ca 9 air mi W of Riverton on U.S. Hwy 26.-108.527743.09161639Lane between horse pasture and big field.RMRM599471 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.28649B. E. Nelson1993817229U.S.A.WyomingGoshen[location and coordinates withheld]15061512Roadside shaded by boxelder and willow trees. Phenology: flowering.RMRM599470 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.29688B. E. Nelson1993923266U.S.A.WyomingLaramie[location and coordinates withheld]14811512Sandy flats above the creek. Phenology: fruiting.RMRM663686 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.33198B. E. Nelson1994729210U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along County Road 27, ca 1.5 air mi N of the end of Wyo Hwy 159, ca 2.3 air mi NE of Tea Kettle Rock; ca 13.5 air mi N of Torrington.-104.19142.253413961420Siltstone road cut and adjacent slopes. Phenology: flowering.RMRM663685 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.34073B. E. Nelson1994818230U.S.A.WyomingLaramieSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along County Road 143 ca 1 air mi S of Little Horse Creek and ca 2.5 air mi N of U.S. Hwy 85 at Midway, ca 18.7 air mi W of Albin; ca 28 air mi NE of Cheyenne.-104.4572641.4412116921746Sandy road right-of-way adjacent to mixed grass plains. Phenology: flowering.RMRM663684 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.34145B. 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.-105.689543.221815731588Roadside and adjacent right-of-way. Phenology: flowering.RMRM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.34229B. 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.-105.82843.421615601567Large disturbed area in the bottom of a large dry wash. Phenology: flowering.RMRM663683 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.34229B. E. Nelson1994821233U.S.A.WyomingConverseSouthern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Bull Gulch 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.-105.82843.421615601567Large disturbed area in the bottom of a large dry wash. Phenology: flowering.RMRM663682 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.34371B. E. Nelson1994824236U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Goshen Hole: along County Road 41, ca 2 air mi N of the North Platte River, ca 3.5 air mi ESE of Lingle; ca 6 air mi NW of Torrington.-104.279342.11741285Roadside, adjacent right-of-way and fence row. Phenology: flowering.RMRM663681 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.34407B. E. Nelson1994824236U.S.A.WyomingGoshenSouthern Powder River Basin/Southeastern Plains: Southeastern Plains: along County Road 21 ca 6 air mi E of the confluence of Red Cloud Slough and Rawhide Creek, ca 7.8 air mi ESE of Jay Em; ca 28 air mi N of Torrington.-104.221142.436514391442Roadside, adjacent right-of-way and fence row. Phenology: flowering & fruiting.RMRM643033 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.8115Robert D. Dorn199993246U.S.A.WyomingNiobraraMule Creek Junction.-104.211543.37031158Sandy roadside with Melilotus and Helianthus. Phenology: flowering & fruiting.RMRM462 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.B. C. Buffum1892830243U.S.A.WyomingWestonInyan Kara Divide.-104.202844.130317371768Phenology: flowering & fruiting.RMRM615018 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.17158Walter Fertig1996820233U.S.A.WyomingNatronaNorth Platte River Valley: west side of North Platte River at Alcova between Alcova Reservoir and Gray Reef Reservoir, ca 0.5 mi SE of Wyo Hwy 220; ca 27 air mi SW of Casper.1615Dry sandy gravel knolls and low ridges at edge of Sarcobatus clay flats. Phenology: flowering.RMRM840277 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7117Ben Legler200786218U.S.A.New MexicoColfaxVermejo Park Ranch: along Dillon Canyon Road (NM Hwy 476) opposite mouth of Gardiner Canyon, on southwest side of golf course on southwest side of Raton.-104.472027836.88652019Dry weedy road shoulders, with Helianthus annuus, Ericameria nauseosa, grasses. Occasional along road edge. Phenology: flowering.RMRM840276 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7376Ben Legler200789221U.S.A.New MexicoColfaxVermejo Park Ranch: along Crow Canyon Road 0.4 air mi SE of Koehler townsite.-104.612722236.737138891972Old coal mine spoils, sparsely vegetated with Ambrosia acanthicarpa, Ericameria nauseosa, numerous grass species. Flowers yellow; common. Phenology: flowering & fruiting.RMRM840275 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7507Ben Legler2007812224U.S.A.New MexicoColfaxVermejo Park Ranch: roadside along Vermejo River at mouth of Gachupin Canyon; 9.3 air mi SE of Casa Grande.-104.864722236.785833332109Dry weedy roadside with Kochia scoparia, Ambrosia acanthicarpa, Chenopodium spp., grasses. Heads pale yellow; common.RMRM840274 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7583Ben Legler2007813225U.S.A.New MexicoColfaxVermejo Park Ranch: small dirt road at west end of Vermejo Park, south side of Vermejo River 1.5 air mi WNW of Casa Grande.-105.006472236.896833332298Weedy roadside and adjacent grassland, silty soil, with Ambrosia acanthicarpa, Amaranthus powellii, Bidens tenuisecta, grasses. Heads pale yellow; common along road edge. Phenology: flowering.RMRM840273 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7814ABen Legler2007816228U.S.A.New MexicoColfaxVermejo Park Ranch: along banks of Ponil Creek 0.7 air mi downstream (SE of) junction of North Ponil Creek and South Ponil Creek; 5.3 air mi NW of Cimarron.-104.956388936.579972222027Sandy creek bottoms dominated by dense growth of Symphoricarpos occidentalis, Conyza canadensis, and Bromus, with scattered Alnus incana and Juniperus scopulorum. Occasional. Phenology: flowering & fruiting.RMRM840272 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.10472Ben Legler200889222U.S.A.New MexicoColfaxVermejo Park Ranch: along south side of the Vermejo River 0.8 air mi E of I-25; 3.2 air mi SSW of Maxwell.-104.55903636.4895251784River bottoms and adjacent dry washes, with Salix exigua, Helianthus annuus, and Schizachyrium scoparium; silty soil. Stems to over 1 meter tall, erect or sprawling, branched below; common in silty soil. Photographed. Specimen GPS: 36.49041, -104.559082. Phenology: flowering.RMRM840271 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.10802Ben Legler2008815228U.S.A.New MexicoColfaxVermejo Park Ranch: old Aeromotor watering pump on south side of U.S. Hwy 64 3.5 air mi NE of Cimarron and 0.2 air mi SW of where highway crosses Encinosa Creek.-104.85480536.532071959Moist to wet soil around water pump, with Schoenoplectus, Polypogon monspeliensis, and Kochia scoparia. Stems erect; occasional in moist soil. Photographed. Specimen GPS: 36.531242, -104.853172. Phenology: flowering.RMRM840268 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.11031Ben Legler2008913257U.S.A.New MexicoColfaxVermejo Park Ranch: slope on northeast side of Vermejo River opposite mouth of Pooler Canyon; 4 air mi SE of Casa Grande.-104.92740636.8465422200Grassland on edge of pinyon-juniper woodland on dry, gentle south-facing slope above river bottoms; with Ambrosia acanthicarpa, Guterrezia sarothrae, Artemisia frigida, and Sporobolus cryptandrus. Stems erect; common. Photographed. Specimen GPS: 36.846516, -104.927444. Phenology: fruiting.RMRM840267 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.11203Ben Legler2008914258U.S.A.New MexicoColfaxVermejo Park Ranch: slope on west side of Cerrososo Canyon 0.8 air mi S of mouth of Plaza Canyon; 5.5 air mi NNE of Cimarron.-104.88597136.594782057Dry north-facing hillside of Pinus edulis and Quercus Ă—undulata over sandstone. Occasional among grasses at base of slope. Specimen GPS: 36.59486, -104.886032. Phenology: flowering & fruiting.RMRM828216 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.63718Ronald L. Hartman1998819231U.S.A.ColoradoFremontWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Sangre de Cristo Range: McCoy Gulch, ca 3.2 air mi S of Cotopaxi.-105.66638.32072240Oak-pinyon-juniper woodland and openings. Phenology: flowering & fruiting.RMRM828363 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.63839Ronald L. Hartman1998819231U.S.A.ColoradoChaffeeWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Sangre de Cristo Range: ca 1-2 air mi S of Salida (city center).-105.997838.516521952378Pinyon-oak shrubland with grassy openings. Phenology: flowering.RMRM155434 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.J. Lunell1911814226U.S.A.North DakotaBensonTurtle Mountains: Pleasant Lake, near St. John.In deep gravel. Phenology: flowering & fruiting.RMRM154044 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.O. A. Stevens William A. Kluender1935818230U.S.A.North DakotaMcHenryDenbigh.Sand dunes (abundant). Phenology: flowering.RMRM250524 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.s.n.J. H. Flodman1941815227U.S.A.NebraskaCheyennePhenology: flowering.RMRM2648 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.179P. A. Rydberg1891815227U.S.A.NebraskaCheyennePotter.Sand draw. Phenology: flowering.RMRM469640 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.1724James C. Whitham1934716197U.S.A.MontanaGallatinCameron.1585Level ground; dry clay, sandy; open pasture with sagebrush; roadsides. Common. Phenology: flowering.RMRM831078 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.10193Brian Elliott Pete Schneider1999731212U.S.A.ColoradoCostillaWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: Forbes Trinchera Ranch: ca 2 mi E of Fort Garland on U.S. Hwy 160.-105.394437.42922408Along the railroad right-of-way and roadside. Phenology: flowering.RMRM831081 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.10607Brian Elliott Elizabeth Mark199989221U.S.A.ColoradoLas Animas[location and coordinates withheld]2012Stream bottom, mixed grass and forbs. Phenology: flowering.RMRM831079 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.66052Ronald L. Hartman1999817229U.S.A.ColoradoAlamosaWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: Colo Hwy 150, 1.2 road mi N of U.S. Hwy 160.-105.699937.4952286Roadside. Phenology: flowering & fruiting.RMRM831080 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.66572Ronald L. Hartman1999823235U.S.A.ColoradoFremontWet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Sangre de Cristo Range: Spring Gulch and near highway.-105.925538.502420732317Canyon bottom and sides. Phenology: flowering & fruiting.RM Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.7873Amy J. Roderick199882214U.S.A.WyomingCarbonUpper North Platte and Laramie River Drainages: Ferris Mountains: Sand Creek Canyon at east end of range, ca 17 air mi N of Independence Rock.1981Creek and adjacent sand dunes. Phenology: flowering.RMRM706289 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.2076Bonnie Heidel2001714195U.S.A.WyomingBig HornYellowtail Wildlife Management Area: N of road.-108.261244.87921121Loose sands, occurs with Sporobolus cryptandrus, Chrysothamnus linifolius. Uncommon. Phenology: flowering & fruiting.RMRM666206 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.8488Amy 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.-107.081642.54031815Disturbed roadside. Phenology: flowering & fruiting.RMRM666205 Ambrosia acanthicarpaphysical specimenAsteraceaeAmbrosiaacanthicarpaHook.8511Amy J. Roderick1998821233U.S.A.WyomingNatronaUpper North Platte and Laramie River Drainages: North Platte River near Fort Caspar, ca 0.5 air mi S of Mills townsite.-106.371942.84381554Willows, cottonwoods, and gravelly banks of river. Phenology: flowering & fruiting.36003,1,0true