Rocky Mountain Herbarium (RM), University of Wyoming
https://rmh.uwyo.edu/data/search.php

Database Search Results

406 matching records found (of 406).
Search query: Genus begins with Ambrosia, Species begins with psilostachya, (search polygon not defined)
Sorted by: Scientific Name

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1.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, El Paso County: East-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.  Elev. 6580 ft.
T12S R66W S29.  38.974 N, 104.807 W.  zone 13, 516691E, 4313709N.  
Weedy, highly disturbed ground with sandy soils along roadway. Phenology: flowering. 

Timothy W. Chumley, 7239.  10/2/1997. 		RM 
     with Randy Pratt
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2.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Thunder Basin National Grassland and Vicinity: along the Cheyenne River from Sheep Creek down stream ca 1 mi, ca 22 air mi NE of Bill; ca 54 air mi NNE of Douglas.  Elev. 4290 ft.
T40N R67W S7 W1/2.  43.4562 N, 104.9508 W; uncertainty 1 mi..  
Banks along the river. Phenology: flowering. 

B. E. Nelson, 57990.  8/14/2002. 		RM 
     with Peter Ebertowski
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3.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Thunder 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.  Elev. 4280-4360 ft.
T40N R68W S22 NW1/4; also NE1/4 S21.  43.4275 N, 105.0107 W; uncertainty 1 mi..  
Sand bars and sandy silt flats along the river. Phenology: flowering. 

B. E. Nelson, 58018.  8/14/2002. 		RM 
     with Peter Ebertowski
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4.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Thunder 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.  Elev. 4460 ft.
T40N R69W S5 South1/4.  43.4706 N, 105.1705 W; uncertainty 1 mi..  
Sand flats in the stream bottom. Phenology: flowering. 

B. E. Nelson, 58149.  8/16/2002. 		RM 
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5.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Thunder Basin National Grassland and Vicinity: west side of Cow Creek Buttes on a ridge S of Middle Creek and Coal Draw, ca 14 air mi E of Bill; ca 41 air mi NNE of Douglas.  Elev. 4680-4800 ft.
T38N R68W S13 W1/2.  43.2695 N, 104.9708 W; uncertainty 1 mi..  
Scoria ridges, slopes, and flats. Phenology: flowering. 

B. E. Nelson, 58173.  8/19/2002. 		RM 
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6.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Thunder 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.  Elev. 3960-3980 ft.
T38N R64W S18 SE1/4.  43.2625 N, 104.5827 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Creek bed. Phenology: flowering. 

Peter J. Ebertowski, 1676.  7/13/2002. 		RM 
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7.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: Cottonwood Creek E of County Road 7A, ca 32 air mi ESE of Wright; ca 41 air mi WSW of Newcastle.  Elev. 4370-4510 ft.
T41N R67W S4 NW1/4.  43.5585 N, 104.9103 W; uncertainty 0.5 mi..  
Grassy gully leading to creek. Phenology: flowering. 

Peter J. Ebertowski, 2738.  8/11/2002. 		RM 
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8.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Thunder 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.  Elev. 4810-4840 ft.
T40N R73W S35.  43.3921 N, 105.5892 W; uncertainty 1 mi..  
Stream channel. Phenology: flowering. 

Peter J. Ebertowski, 2855.  8/13/2002. 		RM 
     with B. E. Nelson
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9.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: along Coal Creek and one of its tributaries ca 2 air mi WSW of Coal Creek's confluence with Little Powder River, ca 24 air mi ENE of Gillette; ca 31 air mi NW of Moorcroft.  Elev. 3880-3960 ft.
T54N R71W S36 South1/2.  44.6145 N, 105.3393 W; uncertainty 1 mi..  
Creek floodplain, stony soil. Phenology: flowering. 

Peter J. Ebertowski, 3287.  8/20/2002. 		RM 
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10.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: hills above and N of Wild Horse Creek, on two-track road off York or Forest Road 900, ca 27 air mi NNE of Gillette; ca 29 air mi NNW of Moorcroft.  Elev. 3840-3980 ft.
T54N R70W S26.  44.6292 N, 105.238 W; uncertainty 1 mi..  
Slopes with little bluestem and yucca. Phenology: flowering. 

Peter J. Ebertowski, 3318.  8/20/2002. 		RM 
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11.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: ridge above and NE of Duck Creek, on gravel road ca 1 air mi SE of Rocky Point or County Road 85, ca 38 air mi NNE of Gillette; ca 39 air mi NNW of Moorcroft.  Elev. 3740-3960 ft.
T56N R70W S36 NE1/4.  44.7908 N, 105.2178 W; uncertainty 0.5 mi..  
Little bluestem and yucca. Phenology: flowering. 

Peter J. Ebertowski, 3353.  8/20/2002. 		RM 
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12.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Thunder Basin National Grassland and Vicinity: Crooked Creek on Cheyenne River or County Road 6, ca 11.5 air mi W of Mule Creek Junction; ca 33 air mi SSW of Newcastle.  Elev. 3840 ft.
T40N R63W S32 NW1/4.  43.4069 N, 104.4581 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Roadside in little bluestem/sandreed grassland. Phenology: flowering. 

Peter J. Ebertowski, 3447.  8/25/2002. 		RM 
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13.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: along Piney Creek off of Piney Canyon or County Road 17, ca 25 air mi SE of Wright; ca 27 air mi NNE of Bill.  Elev. 4580-4640 ft.
T42N R68W S29 NE1/4.  43.5868 N, 105.05 W; uncertainty 0.5 mi..  
Creek bank. Phenology: flowering. 

Peter J. Ebertowski, 3508.  8/26/2002. 		RM 
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14.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Thunder Basin National Grassland and Vicinity: Sage Creek on County Road 64, ca 14 air mi NNE of Lusk; ca 19 air mi NE of Manville.  Elev. 4420 ft.
T34N R62W S5 SW1/4.  42.944 N, 104.3376 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Fenceline along grassland and wet meadow. Phenology: flowering. 

Peter J. Ebertowski, 3563.  8/30/2002. 		RM 
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15.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: low ridge draining to and N of Little Thunder Creek on Wyo Hwy 450, ca 29 air mi ESE of Wright; ca 38 air mi WSW of Newcastle.  Elev. 4340-4430 ft.
T43N R67W S32 N1/2.  43.6576 N, 104.9303 W; uncertainty 1 mi..  
Sandy knolls and bowls; yucca, sandreed and sand bluestem. Phenology: flowering & fruiting. 

Peter J. Ebertowski, 3637.  9/1/2002. 		RM 
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16.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: upper (northern) part of Fields Draw, on Wyo Hwy 450, ca 32 air mi WSW of Newcastle; ca 33 air mi E of Wright.  Elev. 4320-4440 ft.
T43N R67W S24.  43.6859 N, 104.8505 W.  
Ravine floor, with scattered big sagebrush. Phenology: flowering. 

Peter J. Ebertowski, 7656.  8/4/2003. 		RM 
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17.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: West Fork Cottonwood Creek, on Avon Road, ca 15 air mi ENE of Gillette; ca 6 air mi N of Rozet.  Elev. 4120-4220 ft.
T51N R70W S36 N1/2.  44.3592 N, 105.2164 W.  
Creek bank. Phenology: flowering & fruiting. 

Peter J. Ebertowski, 8089.  8/13/2003. 		RM 
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18.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: hills and ravines ca 0.5 mi E of Soda Well, on Forest Road 1247, ca 31 air mi NNE of Gillette; ca 33 air mi NNW of Moorcroft.  Elev. 3940-4040 ft.
T54N R70W S3 W1/2.  44.688 N, 105.2583 W.  
Ravine floor with occasional Rocky Mountain juniper. Phenology: flowering & fruiting. 

Peter J. Ebertowski, 8135.  8/13/2003. 		RM 
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19.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Thunder Basin National Grassland and Vicinity: Gibson Draw, ca 0.7 mi N of Antelope Creek, on Forest Road 973, ca 25 air mi SE of Wright; ca 53 air mi N of Douglas.  Elev. 4460-4500 ft.
T41N R69W S32 SW1/4.  43.4876 N, 105.1697 W.  
Creek bed and bank. Phenology: flowering. 

Peter J. Ebertowski, 8232.  8/15/2003. 		RM 
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20.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Thunder 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.  Elev. 4320-4400 ft.
T40N R69W S14 NW1/4.  43.4418 N, 105.1106 W.  
Broad sandy stream terrace with clusters of large cottonwoods. Phenology: flowering & fruiting. 

Peter J. Ebertowski, 8521.  8/22/2003. 		RM 
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21.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: grassland in Mush Creek Oil Field, ca 1 mi NE of South Beaver Creek, on Wyo Hwy 450, ca 14 air mi WSW of Newcastle; ca 23 air mi SSE of Upton.  Elev. 4140-4280 ft.
T44N R64W S23 E1/2.  43.7709 N, 104.5114 W.  
Sandy hills with rock outcrops, yucca and prairie sandreed abundant. Phenology: flowering. 

Peter J. Ebertowski, 8537.  8/23/2003. 		RM 
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22.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: hills ca 1 mi E of Dry Fork Spring Creek, on two-track road off York or Forest Road 900, ca 29 air mi NNE of Gillette; ca 31 air mi NW of Moorcroft.  Elev. 3860-3960 ft.
T54N R70W S14 NW1/4.  44.6586 N, 105.238 W.  
Ravine floor in grassland. Phenology: flowering. 

Peter J. Ebertowski, 8654.  8/25/2003. 		RM 
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23.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: near the dam on Upper Lake Mary, S of Anderson Mesa, ca 10.5 air mi SE of Flagstaff.  Elev. 6800-6840 ft.
T20N R8E S27 SE1/4.  35.081 N, 111.5314 W; GPS Reading.  
Roadside, edge of parking lot, and other disturbed sites near the spillway. Phenology: flowering & fruiting. 

B. E. Nelson, 63496.  9/24/2004. 		RM 
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24.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: Diversion Park on County Road 3 (Forest Hwy 3), ca 19 air mi ESE of Sedona.  Elev. 7340 ft.
T16N R9E S7 SW1/4; also NW1/4 S18.  34.7822 N, 111.4416 W; GPS Reading.  
Meadow. Phenology: flowering. 

B. E. Nelson, 63542.  9/24/2004. 		RM 
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25.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: in and along James Canyon from I-17 W, ca 11 air mi S of Flagstaff.  Elev. 6500-6600 ft.
T19N R7E S7 SE1/4.  35.0466 N, 111.6907 W; GPS Reading.  
Rocky shallow canyon. Phenology: flowering & fruiting. 

B. E. Nelson, 63600.  9/25/2004. 		RM 
     with James F. Fowler
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26.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: County Road (Forest Hwy) 3, ca 9 air mi N of Clints Well.  Elev. 7371 ft.
T15N R9E S26; also S27.  34.6588 N, 111.3753 W; GPS Reading.  
Roadside. Phenology: flowering & fruiting. 

Ronald L. Hartman, 79906.  8/22/2004. 		RM 
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27.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Hat Creek Breaks: ridge between S Bar and East Indian Creeks, ca 1.5 air mi SW of Whitman; ca 18 air mi NE of Lusk.  Elev. 4700 ft.
T33N R61W S1.  42.8688 N, 104.1291 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Roadside. Phenology: fruiting. 

B. E. Nelson, 11608.  9/10/1984. 		RM 599465	Barcode: RM0231542
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28.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: County Road (Forest Hwy) 3, ca 7 air mi N of Clints Well.  Elev. 7095 ft.
T15N R9E S35.  35.2137 N, 111.6499 W; GPS Reading.  
Ponderosa pine. Phenology: flowering & fruiting. 

Ronald L. Hartman, 79927.  8/22/2004. 		RM 
     with James F. Fowler
_________________________________________________________________________

29.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: ca 8 air mi SSW of Flagstaff; Kelly and Fry canyons, area of intersection.  Elev. 6273-6299 ft.
T19N R6E S1; also S2.  35.0614 N, 111.7201 W to 35.0588 N, 111.7169 W; GPS Reading.  
Stream bottom. Phenology: flowering & fruiting. 

Ronald L. Hartman, 80264.  8/29/2004. 		RM 
     with James F. Fowler
_________________________________________________________________________

30.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: Skunk Canyon where Forest Road 720 crosses, ca 3.5 air mi S of Flagstaff.  Elev. 6900-6950 ft.
T20N R7E S3 E1/4.  35.1452 N, 111.6394 W; GPS Reading.  
Open weedy valley bottom. Phenology: flowering. 

B. E. Nelson, 66536.  9/13/2005. 		RM 
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31.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: ridge between Fay and Skunk canyons off Forest Road 720, down to Skunk Canyon, ca 3.5 air mi S of Flagstaff.  Elev. 6860-6960 ft.
T20N R7E S2 NE1/4; also T21N R7E S35 SW1/4.  35.1503 N, 111.6223 W; GPS Reading.  
Open ponderosa pine forest. Phenology: flowering. 

B. E. Nelson, 66579.  9/13/2005. 		RM 
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32.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Kaibab National Forest: Barney Flat at the intersection of Forest Road 108 and County Road 73, ca 6 air mi S of Williams.  Elev. 7010 ft.
T21N R2E S26 SW1/4.  35.1643 N, 112.1576 W.  
Forb meadow and adjacent roadside. Phenology: flowering. 

B. E. Nelson, 69832.  8/24/2006. 		RM 
     with James F. Fowler
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33.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Kaibab National Forest: Barney Flat at the intersection of Forest Road 108 and County Road 73, ca 6 air mi S of Williams.  Elev. 7010 ft.
T21N R2E S26 SW1/4.  35.1643 N, 112.1576 W.  
Forb meadow and adjacent roadside. Phenology: flowering. 

B. E. Nelson, 69849.  8/24/2006. 		RM 
     with James F. Fowler
_________________________________________________________________________

34.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Sitgreaves National Forest: Mogollon Plateau: Chevelon Canyon Campground and Chevelon Crossing on Forest Road 504, ca 15.5 air mi NW of Heber; ca 30.5 air mi S of Winslow.  Elev. 6140-6200 ft.
T14N R15E S19 NE1/4.  34.5916 N, 110.7879 W.  
Juniper woodland on sandy slope. Phenology: flowering. 

B. E. Nelson, 69929.  8/25/2006. 		RM 
     with James F. Fowler, Brian Reif
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35.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Archuleta County: Eastern San Juan Mountains: San Juan National Forest: U.S. Hwy 160 W to Forest Road 620 then ca 4 road mi NNW; ca 21 air mi W of Pagosa Springs. Central  Elev. 7170 ft.
T35N R5W S35 E1/4.  37.2684 N, 107.3797 W.  
Roadside and grazed opening in ponderosa pine forest. Phenology: flowering. 

Jeanette Flaig, 2740.  8/16/2003. 		RM 794543
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36.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Archuleta County: Eastern San Juan Mountains: northeast end of Mesa Cortado, S of U.S. Hwy 84, ca 17.5-18 air mi SE of Pagosa Springs.  Elev. 7800-8300 ft.
T33N R1E S28 N1/2.  37.0727 N, 106.8505 W; GPS Reading.  
Old roadbed in valley bottom. Phenology: flowering. 

B. E. Nelson, 62646.  8/15/2004. 		RM 
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37.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: at the intersection of Ariz Hwy 87 and Forest Road 300 in the vicinity of Baker Lake, ca 1 air mi N of the Mogollon Rim, ca 53 air mi SSE of Flagstaff.  Elev. 7430 ft.
T12N R9E S3 W1/4.  34.4546 N, 111.396 W.  
Highway right-of-way and adjacent ponderosa pine forest with oak. Phenology: flowering. 

B. E. Nelson, 70543.  8/31/2006. 		RM 
     with James F. Fowler
_________________________________________________________________________

38.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: cattle loading pens across from Limestone Ranch turnoff (Forest Road 137).  Elev. 7300 ft.
T13N R12E S30 NW1/4.  34.4906 N, 111.1237 W.  
Disturbed area. Phenology: flowering. 

Ronald L. Hartman, 83902.  9/13/2006. 		RM 
     with James F. Fowler
_________________________________________________________________________

39.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: roadside pullout on I-17, ca 9 air mi SE of Sedona.  Elev. 6300-6400 ft.
T17N R7E S36.  34.808 N, 111.6002 W; uncertainty 0.25 mi..  
Phenology: flowering. 

Ronald L. Hartman, 84041.  9/14/2006. 		RM 
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40.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: Schnebly Hill Vista and along rim for 1/4 mi.  Elev. 5900-5950 ft.
T17N R6E S2 NW1/4.  34.889 N, 111.7031 W.  
Arizona cypress. Phenology: flowering & fruiting. 

Ronald L. Hartman, 84064.  9/14/2006. 		RM 
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41.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Yavapai County: Prescott National Forest: Woodchute Trailhead to south end of Woodchute Wilderness.  Elev. 7120 ft.
T15N R2E S4.  34.7107 N, 112.1547 W to 34.7144 N, 112.1599 W.  
Parking lot and along trail and oak thickets. Phenology: flowering. 

Ronald L. Hartman, 84085.  9/14/2006. 		RM 
_________________________________________________________________________

42.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: intersection of Forest roads 90 and 240, ca 1 air mi W of Morman Lake.  Elev. 7130 ft.
T18N R9E S18.  34.9457 N, 111.4891 W.  
Roadside and wet area. Phenology: flowering. 

Ronald L. Hartman, 84329.  9/14/2006. 		RM 
     with James F. Fowler
_________________________________________________________________________

43.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: Transfer Station at Willard Interchange on I-17.  Elev. 6738 ft.
T18N R6E S1.  34.9736 N, 111.6925 W.  
Roadsides and disturbed areas around station. Phenology: flowering. 

Ronald L. Hartman, 84377.  9/14/2006. 		RM 
     with James F. Fowler
_________________________________________________________________________

44.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Navajo County: Sitgreaves National Forest: Black Canyon along Forest Road 86, ca 5.5 air mi SW of Heber.  Elev. 6800 ft.
T11N R16E S9.  34.3684 N, 110.6447 W; uncertainty 0.25 mi..  
Stream bottom. Phenology: buds. 

Ronald L. Hartman, 84766.  9/21/2006. 		RM 
_________________________________________________________________________

45.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Colfax County: I-25 at interchange 455, ca 1 air mi NNW of Raton.  Elev. 6900-7000 ft.
T31N R23E S13.  36.9243 N, 104.4519 W; uncertainty 0.25 mi..  
Juniper-oak road cuts. Phenology: flowering. 

Ronald L. Hartman, 63654.  8/17/1998. 		RM 960927	Barcode: RM0216559
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46.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Catron County: Datil National Forest.  Elev. 7800 ft.
T7S R16W S26.  
Park grass community in shallow, gravelly loam on a 20% south slope with blue grama and sunflower; not abundant; distributed in park and woodland communities. Phenology: vegetative only. 

Barnard A. Hendricks, H-8.  9/23/1925. 		USFS 469650
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47.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Sierra County: Datil National Forest: Valley land.  Elev. 7400 ft.
Weed community in rocky soil on an east slope with weeds; scattered abundance; distribution confined to overgrazed areas. Phenology: fruiting. 

Benton S. Rogers, 19.  10/3/1921. 		USFS 469651
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48.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Gila County: Crook National Forest: Summit Erosion Plot.  Elev. 3900 ft.
T2N R14E S4.  
Semidesert weed grass community in shallow sandy loam on a 20% south slope with Bouteloua filiformis, sideoats and Calliandra; very common; semidesert mesas and slopes. Phenology: flowering & fruiting. 

Barnard A. Hendricks, 2170.  9/29/1937. 		USFS 469734
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49.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Yavapai County: Coconino National Foerst: Beaver Creek watershed, Stoneman Lake Road, 1 mi E of Ariz Hwy 79.
Juniper-Pinyon pine forest and watershed; occasional. Phenology: flowering. 

Charles Feddema, 3694.  8/15/1967. 		USFS 469657
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50.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Gila County: Sierra Ancha National Forest: North Fork Workman Creek.  Elev. 7000 ft.
T6N R14E S33.  
Clearcut in Ponderosa pine on a 10% south exposure with mixed grasses and forbs. Phenology: flowering & fruiting. 

Charles P. Pase, 1780.  10/24/1967. 		USFS 469649
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51.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Flagstaff vicinity.  Elev. 7000 ft.
T21N R7E S16.  
Phenology: buds. 

D. T. MacDougal, 308.  7/18/1898. 		RM 31629
_________________________________________________________________________

52.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Dona Ana County: Organ Mountains.  Elev. 5000 ft.
Phenology: flowering & fruiting. 

E. O. Wooton, 450.  9/5/1897. 		RM 18118
_________________________________________________________________________

53.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Dona Ana County: Las Cruces.  Elev. 3900 ft.
Phenology: flowering & fruiting. 

E. O. Wooton, 466.  9/10/1897. 		RM 17839
_________________________________________________________________________

54.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 20 mi SSE of Hermosa, next to the Cheyenne River.  Elev. 2750 ft.
T5S R9E S33.  43 34.03' N, 103 3.36' W; GPS Reading.  
In sandy soil on river banks. Phenology: flowering. 

Grace M. Kostel, 2904.  6/25/2004. 		RM 
_________________________________________________________________________

55.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 14.5-15 air mi SE of Hermosa and 2.4 mi N of County Road 18.  Elev. 2800-3100 ft.
T4S R9E S24 N1/2; also SE1/4 S13.  43 42.14' N, 103 0.3' W to 43 41.27' N, 102 58.1' W to 43 41.52' N, 102 58.76' W; GPS Reading.  
Butte rock slopes and top. Phenology: flowering. 

Grace M. Kostel, 3277.  7/2/2004. 		RM 
_________________________________________________________________________

56.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Navajo County: Sitgreaves National Forest.  Elev. 6500 ft.
T11N R20E S32 NW1/4.  
Near dry wash on a south slope with weeds and grasses. Phenology: flowering. 

F. R. Wigely, 56.  9/1/1914. 		USFS 469648
_________________________________________________________________________

57.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 22 air mi SE of Hermosa on the Cheyenne River.  Elev. 2600 ft.
T4S R11E S21.  43.5158 N, 103.0557 W; GPS Reading.  
On west bank of river in sand soil. Phenology: flowering. 

Grace M. Kostel, 4195.  7/26/2004. 		RM 
_________________________________________________________________________

58.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 22 air mi SE of Hermosa on the Cheyenne River.  Elev. 2600 ft.
T4S R11E S21.  43.5158 N, 103.0557 W; GPS Reading.  
On west bank of river in sand soil. Phenology: flowering. 

Grace M. Kostel, 4199.  7/26/2004. 		RM 
_________________________________________________________________________

59.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 15.5-16 air mi SSE of Hermosa, French Creek.  Elev. 3050 ft.
T5S R9E S9 NE1/4.  43.6349 N, 103.0618 W; GPS Reading.  
Along banks of creek.  Soils are silty and mucky in creek bottom. Phenology: flowering. 

Grace M. Kostel, 4366.  8/3/2004. 		RM 
     with Steve Popovich
_________________________________________________________________________

60.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 15-15.5 air mi SSE of Hermosa and 0.5 mi NW of Forest Road 7064.  Elev. 3100-3150 ft.
T5S R9E S4 SW1/4.  43 38.35' N, 103 3.57' W; GPS Reading.  
In cattle exclosure around spring seep in the hillside.  Area is floristically diverse and permanently protected from grazing. Phenology: flowering. 

Grace M. Kostel, 4413.  8/5/2004. 		RM 
_________________________________________________________________________

61.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 6-6.5 air mi NW of Crawford, Little Cottonwood Creek.  Elev. 3800 ft.
T32N R5E S14; N12 S14.  42 45.44' N, 103 30.07' W; GPS Reading.  
In creek of actively flowing water.. Phenology: flowering. 

Grace M. Kostel, 4484.  8/6/2004. 		RM 
_________________________________________________________________________

62.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 21 air mi SW of Edgemont.  Elev. 3200 ft.
T11S R1E S12 W1/2.  43.1103 N, 103.9503 W; GPS Reading.  
Silver sagebrush plant community in silty soils of ephemeral draws. Phenology: flowering. 

Grace M. Kostel, 4574.  8/14/2004. 		RM 
_________________________________________________________________________

63.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest: Munds Park Administration site.  Elev. 7000 ft.
Clayey loam with evening primrose, lupines, Douglas fir and knotweed; abundant; widely distributed. Phenology: flowering. 

Floyd E. Betts, 45.  8/17/1923. 		USFS 469655
_________________________________________________________________________

64.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 14.5 air mi SSE of Wall.  Elev. 2560 ft.
T3S R16E S15 N1/2.  43 47.144' N, 102 11.572' W; GPS Reading.  
Soils are gravel and sand. Phenology: flowering & fruiting. 

Grace M. Kostel, 8200.  7/7/2005. 		RM 
_________________________________________________________________________

65.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 1.5 air mi due N of Scenic.  Elev. 2800 ft.
T3S R13E S10 W1/2.  43 48.007' N, 102 33.269' W; GPS Reading.  
In badlands floodplain wetland, soils are black clay alkaline muck. Phenology: buds. 

Grace M. Kostel, 8763.  7/17/2005. 		RM 
_________________________________________________________________________

66.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 1 air mi NW of Redshirt and ca 2 air mi due W of County Road 40, Cheyenne River.  Elev. 2675 ft.
T4S R10E S27.  43 40.327' N, 102 54.664' W; GPS Reading.  
At the shores of river, soils are gravel and sand. Phenology: flowering. 

Grace M. Kostel, 8977.  7/20/2005. 		RM 
_________________________________________________________________________

67.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 10.5 air mi SE of Fairburn.  Elev. 2755 ft.
T5S R9E S22 E1/2.  43 36.063' N, 103 2.196' W; GPS Reading.  
Soils are sand overlain with gravel sediments. Phenology: flowering. 

Grace M. Kostel, 8992.  7/21/2005. 		RM 
_________________________________________________________________________

68.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 18 air mi ESE of Fairburn, Cheyenne River.  Elev. 2850 ft.
T4S R11E S30 South1/2.  43 40.232' N, 102 51.123' W; GPS Reading.  
On sand bluff overlooking the river, south aspect, soil is sand. Phenology: flowering. 

Grace M. Kostel, 9044.  7/21/2005. 		RM 
_________________________________________________________________________

69.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 9.5 air mi NW of Edgemont.  Elev. 3725 ft.
T8S R1E S10 NE1/4.  43 22.557' N, 103 59.026' W; GPS Reading.  
In rolling grassland with sandy soils. Phenology: flowering & fruiting. 

Grace M. Kostel, 9334.  8/5/2005. 		RM 
_________________________________________________________________________

70.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 20 air mi NNW of Crawford in Sand Creek.  Elev. 3750 ft.
T33N R53W S25 SW1/4.  42 48.157' N, 103 30.808' W; GPS Reading.  
Soils are sand and clay. Phenology: flowering & fruiting. 

Grace M. Kostel, 9455.  8/6/2005. 		RM 
_________________________________________________________________________

71.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 24 air mi due W of Montrose.  Elev. 4000 ft.
T34N R56W S13 NE1/4.  42 55.587' N, 103 58.56' W; GPS Reading.  
In an ephemeral stream upland of reservoir, soil is silty loam. Phenology: flowering & fruiting. 

Grace M. Kostel, 9476.  8/6/2005. 		RM 
_________________________________________________________________________

72.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 12 air mi NW of Crawford in Little Cottonwood Creek.  Elev. 3875 ft.
T32N R53W S14 NE1/4.  42 45.237' N, 103 30.406' W; GPS Reading.  
Perennial stream, soils are sand and loamy clay. Phenology: flowering & fruiting. 

Grace M. Kostel, 9498.  8/6/2005. 		RM 
_________________________________________________________________________

73.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 11.5-12 air mi ESE of Farmingdale and adjacent to west bank of Cheyenne River.  Elev. 2450 ft.
T2S R12E S9 NE1/4.  43 53.909' N, 102 40.712' W; GPS Reading.  
In an abandoned channel of river, soil of clay muck.. Phenology: flowering & fruiting. 

Grace M. Kostel, 9564.  8/7/2005. 		RM 
_________________________________________________________________________

74.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 9 air mi SE of Farmingdale in Cole Draw.  Elev. 2560 ft.
T2S R12E S18 NW1/4.  43 52.86' N, 102 43.777' W; GPS Reading.  
Soils are shale and silt. Phenology: flowering. 

Grace M. Kostel, 9609.  8/7/2005. 		RM 
_________________________________________________________________________

75.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 2.5 air mi due E of Wall.  Elev. 2700 ft.
T1S R16E S2 NW1/4.  43 59.681' N, 102 11.2' W; GPS Reading.  
On an abandoned roadway in small stream cut, loam soil. Phenology: flowering. 

Grace M. Kostel, 9693.  8/9/2005. 		RM 
_________________________________________________________________________

76.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 5.5 air mi SSE of Wall in Bloom Basin.  Elev. 2700 ft.
T1S R16E S26 W1/2.  43 55.612' N, 102 10.353' W; GPS Reading.  
In wet ground depression, soil is silty clay. Phenology: flowering. 

Grace M. Kostel, 9749.  8/10/2005. 		RM 
_________________________________________________________________________

77.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 6 air mi SW of Wall just SW of Kelley Dam.  Elev. 2700 ft.
T1S R15E S34 W1/2.  43 55.034' N, 102 11.5' W; GPS Reading.  
In wet clay ground depression, soils are clay and clay loam. Phenology: flowering. 

Grace M. Kostel, 9769.  8/10/2005. 		RM 
_________________________________________________________________________

78.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Jackson County: Buffalo Gap National Grassland and Vicinity: ca 12 air mi SW of Kadoka.  Elev. 2280 ft.
T4S R20E S3 NE1/4.  43 43.982' N, 101 42.655' W; GPS Reading.  
In wetland reservoir, soils are clay loam muck. Phenology: flowering. 

Grace M. Kostel, 9884.  8/15/2005. 		RM 
_________________________________________________________________________

79.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Jackson County: Buffalo Gap National Grassland and Vicinity: ca 11.5 air mi SW of Kadoka.  Elev. 2300 ft.
T3S R20E S21 E1/2.  43 46.267' N, 101 43.439' W; GPS Reading.  
In wetland reservoir. Phenology: flowering. 

Grace M. Kostel, 9905.  8/16/2005. 		RM 
_________________________________________________________________________

80.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Rio Arriba County: Carson National Forest and Vicinity: Mogote Ridge: around Puertecito Tank and vicinity at Puertecito de las Ranas, ca 8 air mi SE of Canjilon; ca 24.5 air mi SE of Tierra Amarilla.  Elev. 9000-9100 ft.
T25N R6E S18 SE1/4.  36.3946 N, 106.3388 W; GPS Reading.  
Areas around the reservoir. Phenology: flowering. 

B. E. Nelson, 66034.  8/2/2005. 		RM 940348	Barcode: RM0112087
_________________________________________________________________________

81.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Rio Arriba County: Carson National Forest and Vicinity: Jicarilla Ranger District: Arroyo La Jara near west forest boundary, just S of U.S. Hwy 64, WSW of Dulce.  Elev. 6570-6750 ft.
T29N R5W S24 SE1/4; also T29N R4W SW1/4 S19.  36.7099 N, 107.3028 W; GPS Reading.  
Arroyo floodplain and flats with Artemisia tridentata and chamisa. Phenology: flowering. 

Jill E. Larson, 4634.  8/22/2005. 		RM 940350	Barcode: RM0112089
_________________________________________________________________________

82.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Rio Arriba County: Carson National Forest and Vicinity: Jicarilla Ranger District: Eul Point on Carracas Mesa via Forest Road 218/2182, 0.5 air mi S of state line, W of Dulce.  Elev. 7300-7550 ft.
T32N R4W S10.  36.9929 N, 107.3534 W; GPS Reading.  
Gas pad site with wild horse salt block. Phenology: flowering. 

Jill E. Larson, 4713.  8/22/2005. 		RM 940349	Barcode: RM0112088
_________________________________________________________________________

83.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Sierra County: Datil National Forest.
Phenology: flowering & fruiting. 

James A. Simmons, 102.  //1920. 		USFS 469652
_________________________________________________________________________

84.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Cochise County: Chiricahua Mountains: Wilgus Ranch.  Elev. 4900 ft.
T18S R28E S9.  
Springy soil along creek near premises, underlain by andesitic table rock. Phenology: fruiting. 

J. C. Blumer, 1779.  10/10/1907. 		RM 155165
_________________________________________________________________________

85.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Greenlee County: Apache National Forest: Sixshooter Gap. [Sixshooter Canyon]  Elev. 6450 ft.
T4S R31E S1.  
Phenology: vegetative only. 

M. L. Nichols, 134.  10/10/1913. 		USFS 469658
_________________________________________________________________________

86.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Navajo County: Sitgreaves National Forest: Lakeside Ranger Station.  Elev. 6600 ft.
T9N R22E S23.  
Yellow pine community in rocky soil on a flat slope; common. Phenology: flowering. 

M. W. Talbot, 135.  8/27/1916. 		USFS 469647
     with P. H. Roberts
_________________________________________________________________________

87.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Wetlands and Adjacent Areas: Horse Creek, ca 8.5 air mi SW of Yoder.  Elev. 4195 ft.
T22N R61W S23 E1/2.  41.8621 N, 104.1523 W; GPS Reading.  
Dry uplands. Phenology: flowering. 

Rachel Newton, 2856.  7/31/2005. 		RM 
_________________________________________________________________________

88.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: Wetlands and Adjacent Areas: Bear Creek, ca 9 air mi SSE of Chugwater.  Elev. 5441 ft.
T19N R66W S10 NE1/4.  41.6353 N, 104.7636 W; GPS Reading.  
Moist banks and flood plains. Phenology: flowering. 

Rachel Newton, 2879.  7/31/2005. 		RM 
_________________________________________________________________________

89.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Wetlands and Adjacent Areas: Antelope Creek and pond formed by damming, ca 14 air mi NNW of Chugwater.  Elev. 4822 ft.
T23N R67W S28 NW1/4.  41.9406 N, 104.8982 W; GPS Reading.  
Dry uplands. Phenology: flowering. 

Rachel Newton, 2923.  7/31/2005. 		RM 
_________________________________________________________________________

90.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Wetlands and Adjacent Areas: Black Canyon Point, Guernsey Reservoir, ca 3 air mi NW of Guernsey.  Elev. 4391 ft.
T27N R66W S15 SW1/4.  42.3091 N, 104.7702 W; GPS Reading.  
Rocky dry slopes. Phenology: flowering & fruiting. 

Rachel Newton, 3756.  9/3/2005. 		RM 
_________________________________________________________________________

91.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Maricopa County: 14.4 mi S of Sunflower; along Hwy 87.  Elev. 2500 ft.
Juniper-Fraxinus community. Phenology: flowering & fruiting. 

N. Duane Atwood, 17128.  9/9/1991. 		RM 575976
_________________________________________________________________________

92.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Wetlands and Adjacent Areas: Belle Fouche River, ca 1 air mi NW of Moorcroft.  Elev. 4173 ft.
T50N R68W S36 South1/2 of NW1/4.  44.27462 N, 105.97758 W; GPS Reading.  
Dry uplands. Phenology: flowering. 

Rachel Newton, 6371.  7/28/2006. 		RM 
_________________________________________________________________________

93.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Wetlands and Adjacent Areas: Plum Creek, ca 6 air mi NW of Newcastle.  Elev. 4358 ft.
T46N R62W S27 SW1/4 of SE1/4.  43.93375 N, 104.28365 W; GPS Reading.  
Dry uplands. Phenology: flowering. 

Rachel Newton, 6399.  7/28/2006. 		RM 
_________________________________________________________________________

94.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Mohave County: 2.5 mi NW of Mount Dellenbaugh and 0.5 mi W of Mociac Well.  Elev. 5916 ft.
T32N R12W S28.  
Ponderosa-oak-juniper community. Phenology: flowering & fruiting. 

N. Duane Atwood, 27941.  10/10/2001. 		RM 741480
     with L. C. Higgins
_________________________________________________________________________

95.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Larimer County: Roosevelt National Forest: Front Range: Hell Canyon Road (Forest Road 4021), from U.S. Hwy 36 to Estes Park, ca 15 air mi SW of Loveland. C  Elev. 8200-8400 ft.
T4N R72W S2; S2.  40.3406 N, 105.4303 W; uncertainty 0.5 mi..  
South facing slopes of ponderosa pine, and occasional aspen in shallow ravines. Phenology: flowering. 

Sarah Nunn, 4009.  8/2/2001. 		RM 765619
_________________________________________________________________________

96.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: 2-3 mi NE of Chugwater.  Elev. 5000 ft.
T21N R66W S20.  41.7831 N, 104.7913 W; NAD 83, uncertainty 1 mi., Digital Map.  
Dry, grassy hills. "on Hwy 34 along Sybille Creek"-fieldbook Phenology: flowering. 

C. L. Porter, 10082.  8/14/1965. 		RM 278228	Barcode: RM0231541
     with Marjorie W. Porter
_________________________________________________________________________

97.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Grant County: Mangas Springs, 18 mi NW of Silver City.  Elev. 4770 ft.
Phenology: flowering & fruiting. 

O. B. Metcalfe, 816.  9/28/1903. 		RM 55281
_________________________________________________________________________

98.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: Between Carpenter and Pine Bluffs.  Elev. 4800 ft.
T14N R61W S29.  41.1565 N, 104.2214 W; NAD 83, uncertainty 2 mi., Digital Map.  
Common roadside weed in cultivated areas. *might be ca 5,200 ft* Phenology: flowering. 

C. L. Porter, 7691.  8/19/1958. 		RM 255916	Barcode: RM0231546
     with Marjorie W. Porter
_________________________________________________________________________

99.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Palmer Canyon Road 5-15 mi W of Wheatland.  Elev. 4800 ft.
T24N R69W S18.  42.0493 N, 105.1677 W; NAD 83, uncertainty 3 mi., Digital Map.  
Common weed of cultivated areas. "5 mi W of Wheatland" Phenology: flowering. 

C. L. Porter, 8008.  8/6/1959. 		RM 260145	Barcode: RM0231544
     with Marjorie W. Porter
_________________________________________________________________________

100.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: Fenton Lake, 4.8 air mi W of La Cueva. From state park parking lot S ca 500 ft on NM Hwy 126, and W ca 500 ft from parking lot along north edge of lake.  Elev. 7675 ft.
T19N R2E S9 SE1/4.  35 53.155' N, 106 43.466' W; GPS reading.  
Roadside. Phenology: flowering. 

Brian Reif, 2521.  7/17/2002. 		RM 806244	Barcode: RM0106247
_________________________________________________________________________

101.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Rio Mora, 2 air mi S of Cowles. NE 0.6 air mi along river on Trail 240 from parking lot in Mora River Campground.  Elev. 7900-8000 ft.
T18N R12E S22 NE1/4; also NW1/4 S23 and SW1/4 S14.  35 46.744' N, 105 39.355' W; GPS reading.  
Mixed conifer forest with grass/sedge understory. Phenology: flowering & fruiting. 

Brian Reif, 2780.  7/28/2002. 		RM 806243	Barcode: RM0106246
_________________________________________________________________________

102.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: NM Hwy 83 in vicinity of Barillas Peak, 10 air mi E of Pecos. From crossing of Sebadilla Creek on NM Hwy 83 S 0.2 air mi along creek.  Elev. 8300-8850 ft.
T16N R14E S32.  35 34.523' N, 105 29.407' W; GPS reading.  
Wet to dry meadow in canyon bottom, surrounding excised creek drainage lined with alder, through mixed conifer/aspen forest. Phenology: flowering & fruiting. 

Brian Reif, 3156.  8/5/2002. 		RM 806193	Barcode: RM0106245
_________________________________________________________________________

103.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Dalton Canyon on Forest Road 123 branching W off the Pecos River, 6 air mi NNW of Pecos.  Elev. 7600 ft.
T17N R11E S25 N1/2.  35 40.285' N, 105 43.531' W; GPS reading.  
Canyon bottom including meadow and roadside. Phenology: flowering & fruiting. 

Brian Reif, 3326.  8/6/2002. 		RM 806192	Barcode: RM0106244
_________________________________________________________________________

104.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, San Miquel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Indian Creek off of NM Hwy 63, 9 air mi N of Pecos. SE on road along creek ca 0.8 air mi.  Elev. 7720-7960 ft.
T17N R12E S5 SW1/4; also NW1/4 S8.  35 43.007' N, 105 41.854' W; GPS reading.  
Meadow and drainage in canyon bottom. Phenology: flowering & fruiting. 

Brian Reif, 4334.  8/20/2002. 		RM 806191	Barcode: RM0106243
_________________________________________________________________________

105.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Coconino County: Coconino National Forest.  Elev. 6800 ft.
T20N R7E S29.  
Coconino/Yavapai counties. Phenology: flowering. 

Robert R. Hill, 187.  8/11/1911. 		USFS 469656
_________________________________________________________________________

106.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Rio Arriba County: Santa Fe National Forest and Vicinity: Jemez Mountains: Forest Road 144, Los Cerros area, 11 air mi W of Espanola.  Elev. 8000-8200 ft.
T21N R6E S23 South1/2; also N1/2 S26.  36 1.856' N, 106 15.818' W; GPS reading.  
Roadside and ponderosa pine forest. Phenology: flowering & fruiting. 

Ronald L. Hartman, 76021.  7/19/2002. 		RM 806187	Barcode: RM0106239
_________________________________________________________________________

107.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Forest Road 60 along Sapello River, 2 air mi SW of Rociada.  Elev. 8000 ft.
T18N R14E S3 W1/2.  35.8129 N, 105.448 W; GPS Reading.  
Canyon bottom parking area at corral and trailhead, including riparian of river and south-facing bank (below road) of mature aspen with Gambels oak. Phenology: flowering & fruiting. 

Brian Reif, 8726.  8/18/2003. 		RM 806190	Barcode: RM0106242
_________________________________________________________________________

108.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Mora County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Capulin Canyon, 4 air mi WSW of Ledoux. N35.9006 W105.4152 S 0.5 air mi to mouth of Ute Canyon at N35.8933 W105.4178.  Elev. 8050-8200 ft.
T19N R14E S1 W1/2.  35.9006 N, 105.4152 W to 35.8933 N, 105.4178 W; GPS Reading.  
Grazed meadow of canyon bottom in surrounding ponderosa pine forest. Phenology: flowering & fruiting. 

Brian Reif, 9087.  8/27/2003. 		RM 806189	Barcode: RM0106241
_________________________________________________________________________

109.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Mora County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Road BO22 along Canoncito Creek, 1 3/4 air mi SW of Holman; from creek crossing to NW 0.2 air mi on road.  Elev. 7700 ft.
36.0216 N, 105.4054 W; GPS Reading.  
Roadside in meadow bottom including lower, south-facing slope of Gambels oak/ pinyon pine, and riparian at creek crossing; ponderosa pine forest. Phenology: flowering. 

Brian Reif, 9228.  8/29/2003. 		RM 806188	Barcode: RM0106240
_________________________________________________________________________

110.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Anton Chico Grant: 5 air mi ENE of Villanueva. N35.2365 W105.2558 to NE 0.5 air mi along Pecos River.  Elev. 5500 ft.
T12N R16E S28 N1/2.  35.2365 N, 105.2558 W; GPS Reading.  
River bottom, mostly juniper with Russian olive and narrowleaf cottonwood. Phenology: flowering. 

Brian Reif, 10060.  8/6/2004. 		RM 804936	Barcode: RM0106238
_________________________________________________________________________

111.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Albany County: City Park, Laramie.  Elev. 7200 ft.
T16N R73W S33.  41.3133 N, 105.5844 W; uncertainty 1 mi..  
Phenology: buds. 

Aven Nelson, 1177.  9/30/1894. 		RM 2839	Barcode: RM0231563
_________________________________________________________________________

112.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Platte Hills near Hartville.  Elev. 4500 ft.
T27N R66W S27.  42.285 N, 104.76333 W; uncertainty 5 mi..  
Phenology: flowering. 

Aven Nelson, 425.  7/11/1894. 		RM 3066	Barcode: RM0231524
_________________________________________________________________________

113.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Albany County: Laramie.  Elev. 7200 ft.
T16N R73W S33.  41.3133 N, 105.5844 W; uncertainty 1 mi..  
Phenology: flowering & fruiting. 

Aven Nelson, 5304.  9/8/1898. 		RM 12729	Barcode: RM0231551
_________________________________________________________________________

114.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Santa Cruz County: Coronado National Forest: Potraro Canyon.  Elev. 3800 ft.
T24S R13E S35.  
Open grass country in gravel to sandy loam on a south slope with summer annuals; abundant; well distributed over the range in all canyon bottoms or flats. Phenology: vegetative only. 

Robert Thompson, 12.  9/1/1921. 		USFS 469686
_________________________________________________________________________

115.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Wheatland.  Elev. 4700-4800 ft.
T24N R68W S13.  42.0545 N, 104.9539 W; uncertainty 9+ mi..  
Phenology: flowering. 

B. C. Buffum, s.n..  8/11/1891. 		RM 1419	Barcode: RM0231523
_________________________________________________________________________

116.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: Ca 5 mi NE of Cheyenne, Wayne Childs Ranch.  Elev. 6150 ft.
41.2185 N, 104.7609 W; NAD 83, , Nat. Geog. TOPO!.  
Abundant in spots, disturbed ground, and roadside gravel. Phenology: flowering & fruiting. 

Barry Hammel, 755.  9/17/1977. 		RM 302153	Barcode: RM0231562
_________________________________________________________________________

117.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Pima County: Pisinemo.
Phenology: buds. 

Sister Mary Agatha, 568.  9//1938. 		RM 180482
_________________________________________________________________________

118.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Gila County: Tonto National Forest: Reynolds Creek Ranger Station field.  Elev. 5500 ft.
T6N R13E S12.  
Park weed community on a gentle northeast slope with Marrubium and sumac. Phenology: flowering. 

W. Ellis Wiltbank, 22.  7/16/1929. 		USFS 469673
_________________________________________________________________________

119.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Johnson County: Buffalo.  Elev. 4000-5000 ft.
T51N R82W S34.  44.3509 N, 106.7125 W; uncertainty 5 mi..  
Rocky hills. Phenology: flowering & fruiting. 

Frank Tweedy, 3130.  10//1900. 		RM 38310	Barcode: RM0231526
_________________________________________________________________________

120.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Cottonwood Creek, 32 road mi NW of Wheatland.  Elev. 1616 m.
T27N R70W S23; also S24.  42.2979 N, 105.2141 W; uncertainty 2 mi..  
Creek banks. Phenology: flowering. 

Jan Pollet, 323.  8/2/1989. 		RM 544416	Barcode: RM0231505
_________________________________________________________________________

121.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Laramie River, 12 road mi NE of Wheatland.  Elev. 4700 ft.
T25N R67W S23.  42.1259 N, 104.8617 W; uncertainty 1 mi..  
Creek banks and grassland. Phenology: flowering. 

Jan Pollet, 348.  8/8/1989. 		RM 543874	Barcode: RM0231507
_________________________________________________________________________

122.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Laramie River, 12 road mi NE of Wheatland.  Elev. 4700 ft.
T25N R67W S23.  42.1259 N, 104.8617 W; uncertainty 1 mi..  
South bank of river. Phenology: flowering. 

Jan Pollet, 406.  8/8/1989. 		RM 544417	Barcode: RM0231504
_________________________________________________________________________

123.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Cottonwood Creek, 32 road mi NW of Wheatland.  Elev. 1616 m.
T27N R70W S23; also S24.  42.2979 N, 105.2141 W; uncertainty 2 mi..  
Creek bank, dry. Phenology: flowering. 

Jan Pollet, 452.  8/14/1989. 		RM 544415	Barcode: RM0231503
_________________________________________________________________________

124.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Between Fish Creek and Fish Creek Road, 18 road mi NW of Wheatland.  Elev. 4748 ft.
T26N R68W S18.  42.2262 N, 105.0575 W; uncertainty 1 mi..  
Stock ponds and drainage of ponds. Phenology: flowering & fruiting. 

Jan Pollet, 734.  9/3/1989. 		RM 544418	Barcode: RM0231502
_________________________________________________________________________

125.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Deadhead Creek, 6 road mi E of Wyo Hwy 34, 12 road mi SW of Wheatland.  Elev. 5087 ft.
T22N R69W S31.  41.8345 N, 105.1662 W; uncertainty 1 mi..  
Creekbanks and creekbed. Phenology: flowering. 

Jan Pollet, 779a.  9/8/1989. 		RM 543873	Barcode: RM0231506
_________________________________________________________________________

126.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: SE of rest area on top of bluffs; ca 0.8 air mi SW of Pine Bluffs.  Elev. 5250 ft.
T14N R60W S15.  41.1794 N, 104.0711 W; uncertainty 1 mi..  
Ponderosa pine/grassland ecotone. Phenology: fruiting. 

Karin M. Guernsey, 164.  11/9/1987. 		RM 398832	Barcode: RM0231547
_________________________________________________________________________

127.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southeastern Plains: Wyoming Game and Fish Department Rawhide Unit: island in North Platte River, ca 3 mi SE of Lingle and 1 1/4 mi S of the U.S. Hwy 85.  Elev. 4100 ft.
T25N R62W S33 NE1/4 SE1/4.  42.0934 N, 104.3081 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Small patch of Populus deltoides/Fraxinus pennsylvanica woods between 2 old overflow channels.  Understory of Symphoricarpos occidentalis, Poa pratensis, and Calamovilfa longifolia.  Soil sandy alluvium. Phenology: fruiting. 

Michele Barlow, 668.  9/8/1992. 		RM 703848	Barcode: RM0231514
     with Steve Kettler
_________________________________________________________________________

128.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Camp Guernsey: near Warm Springs.  Elev. 1359 m.
Level floodplain in sand with Artemisia, Bromus, Calamovilfa, Euphorbia, and Populus spp. Phenology: flowering. 

Patricia P. Douglas, 451.  8/21/1995. 		RM 726896	Barcode: RM0231510
     with B. E. Nelson, R. M. Smith, N. E. Hastings
_________________________________________________________________________

129.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: 12 mi W of Torrington.  Elev. 4400 ft.
T24N R63W S16.  42.0545 N, 104.4309 W; uncertainty 5 mi..  
Phenology: fruiting. 

Robert E. Pfadt, 118.  9/3/1943. 		RM 197409	Barcode: RM0231525
_________________________________________________________________________

130.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: N of Gillette.  Elev. 4550 ft.
T50N R71W S6; also T51N R72W.  44.4344 N, 105.4392 W; uncertainty 6 mi..  
Roadside. Phenology: buds. 

Richard F. Harner, 92.  7/14/1974. 		RM 293317	Barcode: RM0231521
_________________________________________________________________________

131.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: 7 mi SE of Mule Creek Junction.  Elev. 4000 ft.
T39N R60W S31 SW1/4 of SW1/4.  43.3126 N, 104.112 W.  
Roadside with Grindelia and Helianthus. 

Robert D. Dorn, 8116.  9/3/1999. 		RM 
_________________________________________________________________________

132.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: 7 mi SE of Mule Creek Junction.  Elev. 4000 ft.
T39N R60W S31 SW1/4 SW1/4.  43.3084 N, 104.1227 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
Roadside with Grindelia and Helianthus. Phenology: buds. 

Robert D. Dorn, 8116.  9/3/1999. 		RM 643032	Barcode: RM0231522
_________________________________________________________________________

133.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Sheridan County: Hills SE of Sheridan.  Elev. 3800 ft.
Roadsides. Phenology: fruiting. 

Seymour S. Sharp, 414.  9/7/1913. 		RM 78077	Barcode: RM0231520
_________________________________________________________________________

134.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Sheridan County: Hills SE of Sheridan.  Elev. 3800 ft.
Roadsides. Phenology: fruiting. 

Seymour S. Sharp, 414.  9/7/1913. 		RM 78107	Barcode: RM0231519
_________________________________________________________________________

135.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southeastern Plains: Little Cottonwood Draw, ca 5 air mi E of the Laramie River Power Station SE of the Greyrocks Road.  Elev. 4520 ft.
T25N R66W S27 NW1/4 of SE1/4.  42.1115 N, 104.7638 W; uncertainty 0.25 mi..  
Open canopy Populus deltoides community on terrace above stream on sandy soil; understory of Salix amygdaloides, Artemisia cana, and Elymus smithii. Phenology: flowering & fruiting. 

Steve Kettler, 813.  6/13/1991. 		RM 681744	Barcode: RM0231499
_________________________________________________________________________

136.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southeast Plains: Horseshoe Creek, off Horseshoe Creek Road, ca 8 air mi SW of Glendo and I-25.  Elev. 4987 ft.
T28N R70W S1 N1/2.  42.427 N, 105.1946 W; NAD 83, uncertainty 1 mi., Nat. Geog. TOPO!.  
Young stands of Populus angustifolia growing in narrow bands parallel to the stream channel on sandy floodplain; understory sparse. Phenology: flowering. 

Steve Kettler, 883.  8/29/1991. 		RM 644045	Barcode: RM0231500
_________________________________________________________________________

137.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southeast Plains: south bank of Laramie River, ca 1 mi E of Uva and N of landfill.  Elev. 4430 ft.
T25N R67W S21 SW1/4 of NW1/4.  42.1259 N, 104.9009 W; uncertainty 0.25 mi..  
Mature Populus deltoides with occasional Salix amygdaloides along old side channels and understory of Bromus inermis; on sandy-rocky soils of stream terrace. Phenology: flowering. 

Steve Kettler, 917.  9/6/1991. 		RM 644044	Barcode: RM0231501
_________________________________________________________________________

138.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Sheridan County: Goose Creek area, West Lane.  Elev. 4200-4400 ft.
T54N R84W S7.  44.6729 N, 107.0188 W; uncertainty 5 mi..  
Roadsides. Phenology: flowering. 

Vie Willits, 356.  8/9/1909. 		RM 68890	Barcode: RM0231517
_________________________________________________________________________

139.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Foothills of Laramie Range: northwest shore Wheatland Reservoir #1; ca 6 air mi SW of Wheatland.  Elev. 4290 ft.
T23N R68W S6 NE1/4 of NE1/4.  41.9964 N, 105.04889 W; uncertainty 0.25 mi..  
Sagebrush grassland on low bluff on dry, gravelly soil. Phenology: flowering & fruiting. 

Walter Fertig, 14621.  9/21/1993. 		RM 602375	Barcode: RM0231516
     with Jane Struttmann
_________________________________________________________________________

140.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Sandoval County: Valles Caldera National Preserve: Jemez Mountains: San Antonio Hot Springs, hillside above, vicinity of buildings, and 0.5 air mi down San Antonio Creek.  Elev. 8400-8500 ft.
35 58' 18.6" N, 106 33' 38.2" W; uncertainty 1 mi..  
Streamside, rocky slopes, roadsides. Phenology: flowering. 

Ronald L. Hartman, 73851.  8/15/2001. 		RM 711731	Barcode: RM0070409
_________________________________________________________________________

141.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southeast Plains: Horseshoe Creek, off Horseshoe Creek Road, ca 8 air mi SW of Glendo and I-25.  Elev. 4987 ft.
T28N R70W S1 N1/2.  42.427 N, 105.1946 W; uncertainty 1 mi..  
Young stands of Populus angustifolia growing in narrow bands parallel to the stream channel on sandy floodplain; understory sparse. Phenology: flowering. 

Steve Kettler, 883.  //. 		RM 644045
_________________________________________________________________________

142.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southeast Plains: south bank of Laramie River, ca 1 mi E of Uva and N of landfill.  Elev. 4430 ft.
T25N R67W S21 SW1/4 of NW1/4.  42.1259 N, 104.9009 W; uncertainty 0.25 mi..  
Mature Populus deltoides with occasional Salix amygdaloides along old side channels and understory of Bromus inermis; on sandy-rocky soils of stream terrace. Phenology: flowering. 

Steve Kettler, 917.  //. 		RM 644044
_________________________________________________________________________

143.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Grant County: Gila National Forest; Fort Bayard.  Elev. 6500 ft.
Phenology: buds. 

Alvin L. Medina, 142.  8/4/1981. 		RMRS 
_________________________________________________________________________

144.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Grant County: Gila National Forest; Fort Bayard.  Elev. 6500 ft.
Phenology: buds. 

Alvin L. Medina, 142.  8/5/1981. 		RMRS 
_________________________________________________________________________

145.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Gila County: Sierra Ancha National Forest; north fork Workman Creek.  Elev. 7000 ft.
T6N R14E S33.  
Phenology: flowering & fruiting. 

Charles P. Pase, 1780.  10/24/1967. 		RMRS 
_________________________________________________________________________

146.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Gila County: Sierra Ancha Experimental Forest; Wilbank's Ranch.  Elev. 7200 ft.
Phenology: flowering & fruiting. 

R. Roy Johnson, s.n..  8/21/1960. 		RMRS 
_________________________________________________________________________

147.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Pima County: Tucson; Santa Cruz Valley.  Elev. 2400 ft.
Phenology: flowering. 

J. J. Thornber, 41.  9/24/1903. 		RMRS 
_________________________________________________________________________

148.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Grant County: Ft. Bayard Experiment Area.  Elev. 6000 ft.
Phenology: flowering. 

Virgil Scott, s.n..  8/26/1969. 		RMRS 
_________________________________________________________________________

149.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Rapid City, Tourist Park.  Elev. 3200 ft.
T2N R7E S36.  
Common weed. Phenology: flowering. 

Arthur C. McIntosh, 586.  8/10/1924. 		RM 99320	Barcode: RM0231949
_________________________________________________________________________

150.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Fall River County: 4 mi S of Cheyenne River.  Elev. 3400 ft.
T8S R5E S20.  
Frequent in wooded soils. Phenology: flowering. 

Arthur C. McIntosh, 935.  8/19/1927. 		RM 105004	Barcode: RM0231948
_________________________________________________________________________

151.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Fall River County: 5 mi E of Edgemont.  Elev. 3780 ft.
T8S R3E S34.  
Foothills; south slope of hills; grass association; xero-mesophytic. Phenology: flowering. 

Herman E. Hayward, 2508.  7/28/1927. 		RM 111268	Barcode: RM0231960
_________________________________________________________________________

152.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Lawrence County: Whitewood.  Elev. 3600-5000 ft.
T5N R4E S5.  
Canyon; north-facing slope; oak, willow, and elm association. Phenology: flowering. 

Herman E. Hayward, 2589.  8/3/1927. 		RM 111268	Barcode: RM0231950
_________________________________________________________________________

153.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Jewel Cave National Monument: bank near steps from vistors center to parking lot.  Elev. 5400 ft.
T4S R2E S1.  
Phenology: fruiting. 

Hollis Marriott, 9960.  9/2/1985. 		RM 365361	Barcode: RM0231952
_________________________________________________________________________

154.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National grassland: 3 mi N of Conata; prairie dog town.  Elev. 2530 ft.
T3S R16E S21.  43.771 N, 102.1995 W; uncertainty 1 mi..  
Infrequent. Phenology: fruiting. 

K. A. Fagerstone, s.n..  7/29/1975. 		RM 604184	Barcode: RM0231953
_________________________________________________________________________

155.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Custer County: Harney National Forest: forest boundary on Drew Road.  Elev. 4700 ft.
T4S R2E S30.  
5% south slope; deep sandy loam soil; weed type; distriubted along roadsides; common. Phenology: flowering. 

Paul L. Ginter, 135.  8/10/1928. 		USFS 469666	Barcode: USFS0069785
_________________________________________________________________________

156.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Fall River County: 
Phenology: flowering. 

S. S. Visher, 2710.  8/3/1911. 		RM 76177	Barcode: RM0231951
_________________________________________________________________________

157.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Harding County: Extreme northwest corner of county.  Elev. 2850-3300 ft.
T23N R1E S36.  
Phenology: flowering. 

S. S. Visher, 366.  7/15/1910. 		RM 70118
_________________________________________________________________________

158.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Harding County: Little Missouri River Valley: 25 mi N of Ashcroft. [ends up in North Dakota]  Elev. 2900-3300 ft.
T23N R1E S24.  
Open woods. Phenology: buds. 

S. S. Visher, 367.  7/11/1910. 		RM 70092
_________________________________________________________________________

159.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Harding County: Little Missouri Valley: 12 mi N of Crook.  Elev. 3040 ft.
T20N R2E S18.  
Spring soil. Phenology: flowering. 

S. S. Visher, 369.  7/23/1910. 		RM 70090
_________________________________________________________________________

160.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Harding County: West Short Pine Hills.  Elev. 3450-3750 ft.
T17N R1E S13.  
Shaded brooks. Phenology: flowering. 

S. S. Visher, 404.  8/27/1910. 		RM 81395
_________________________________________________________________________

161.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Arapahoe County: Engelwood: field N of 6136 S Niagara Court; near housing development.  Elev. 5300 ft.
Sandy soil, slopes of ravine. Phenology: flowering & fruiting. 

Barry Hammel, 709.  9/7/1977. 		RM 302360
_________________________________________________________________________

162.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Arapahoe County: Along I-70, 2 mi NW of Deer Trail, 36 mi NW of Limon.  Elev. 5100 ft.
Freeway right of way adjacent to cottonwood grove. Phenology: flowering & fruiting. 

Bruce A. Stein, 1954.  8/19/1984. 		RM 526424
_________________________________________________________________________

163.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Archuleta County: San Juan National Forest: Taylor Canyon.  Elev. 7100 ft.
Level, dry adobe with fair humus content. Phenology: flowering & fruiting. 

C. B. Mack, 50.  9/20/1913. 		USFS 469660
_________________________________________________________________________

164.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland. Approx. 40 mi SW of Springfield, along Oklahoma boundary.  Elev. 4400 ft.
T35S R48W S13.  
Canyon grassland, sandstone outcrops. Phenology: vegetative only. 

Charles Feddema, 4365.  6/6/1972. 		RM 469664
_________________________________________________________________________

165.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Logan County: Along U.S. Hwy 6; 2.8 mi E of junction with I-76.  Elev. 4060 ft.
T8N R52W S25.  40.6331 N, 103.1294 W; uncertainty 1 mi..  
Sandy soil with Dalea, Muhlenbergia and Artemesia filifolia. Phenology: flowering & fruiting. 

Dieter H. Wilken, 13893.  9/29/1982. 		RM 345059
_________________________________________________________________________

166.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Larimer County: Poudre River: near confluence with Dry Creek; 3 km ESE of junction of CO Hwy 14 and U.S. Hwy 287.  Elev. 1510 m.
T7N R68W S18 N1/2.  40.5753 N, 105.05 W; uncertainty 1 mi..  
Open, sandy soil with Salix and Populus. Phenology: flowering. 

Dieter H. Wilken, 15002.  8/30/1989. 		RM 733118
     with K. Cook
_________________________________________________________________________

167.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Mesa de Maya Region.  Elev. 5020 ft.
T33S R51W S29 SW1/4.  
Disturbed roadside edge in sandy-clay soils with Salsola australis. Phenology: flowering. 

Dina Clark, 532.  9/14/1994. 		RM 745807
_________________________________________________________________________

168.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Garfield County: White River National Forest: 3 mi N of New Castle.  Elev. 5700 ft.
T5S R91W 23S.  
5 degree east slope, sandy clay: with Artemesia and Chrysothamnus. Phenology: flowering & fruiting. 

E. R. Ware, 191.  10/5/1932. 		USFS 469674
_________________________________________________________________________

169.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: Grover, CO.
Fields. Phenology: flowering. 

Earl L. Johnston, 1173.  7/28/1927. 		RM 117398
_________________________________________________________________________

170.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: Grover: West Pawnee.
Phenology: flowering & fruiting. 

Earl L. Johnston, 147.  9/11/1925. 		RM 105104
_________________________________________________________________________

171.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, El Paso County: Manitou.  Elev. 2100 m.
Phenology: flowering. 

F. E. Clements, 29.  8/16/1901. 		RM 33932
     with E. S. Clements
_________________________________________________________________________

172.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Boulder County: Near Boulder.
Phenology: vegetative only. 

Francis Ramaley, A.196.  10/1/1900. 		RM 23327
_________________________________________________________________________

173.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, no county County: Montezuma National Forest: State Bridge on Dolores Canyon.
Flat, sandy loam. Phenology: flowering & fruiting. 

Frank H. Rose, R-150.  9/22/1922. 		USFS 469665
_________________________________________________________________________

174.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Boulder County: Near Boulder.  Elev. 5000-6000 ft.
Phenology: flowering & fruiting. 

Frank Tweedy, 4873.  7//1902. 		RM 43044
_________________________________________________________________________

175.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Boulder County: Plains and foothills near Boulder.  Elev. 5000 ft.
Phenology: fruiting. 

Frank Tweedy, 4874.  10//1902. 		RM 43043
_________________________________________________________________________

176.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: New Windsor.
Phenology: flowering & fruiting. 

George E. Osterhout, 2350.  8/4/1901. 		RM 155168
_________________________________________________________________________

177.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: New Windsor.
Phenology: flowering & fruiting. 

George E. Osterhout, 2350.  7/11/1901. 		RM 31153
_________________________________________________________________________

178.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: New Windsor.
Phenology: flowering. 

George E. Osterhout, 3451.  8/28/1906. 		RM 155169
_________________________________________________________________________

179.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Larimer County: Fort Collins.
Phenology: flowering. 

George E. Osterhout, 4392.  9/5/1910. 		RM 155149
_________________________________________________________________________

180.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: Windsor.
Phenology: flowering & fruiting. 

George E. Osterhout, 7594.  9/25/1931. 		RM 155164
_________________________________________________________________________

181.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: Windsor.
Phenology: flowering & fruiting. 

George E. Osterhout, 7601.  8/29/1931. 		RM 155162
_________________________________________________________________________

182.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: Windsor, river.
Phenology: flowering & fruiting. 

George E. Osterhout, 7647.  10/19/1931. 		RM 155166
_________________________________________________________________________

183.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Laramie Range: Spring Creek valley off Glendo or County Road 6, ca 16 air mi NE of Laramie Peak, ca 5.3 air mi NE of Esterbrook; ca 21 air mi SSE of Douglas.  Elev. 5700-5800 ft.
T29N R70W S19 SE1/4.  42.4716 N, 105.2949 W.  
At the edge of the channel and lower slopes. Phenology: flowering. 

B. E. Nelson, 42464.  8/11/1997. 		 677552
_________________________________________________________________________

184.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: New Windsor.
Phenology: fruiting. 

George E. Osterhout, 955.  7/27/1896. 		RM 155167
_________________________________________________________________________

185.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Larimer County: Poudre Canyon.
Phenology: flowering. 

George E. Osterhout, s. n.  9/21/1920. 		RM 312241
_________________________________________________________________________

186.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: Windsor.
Phenology: flowering & fruiting. 

George E. Osterhout, s.n..  9/11/1912. 		RM 312952
_________________________________________________________________________

187.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Laramie Range: along Spring Creek below Ridge or County Road 6, ca 16 air mi NE of Laramie Peak, ca 5.5 air mi NE of Esterbrook; ca 13.5 air mi W of Glendo.  Elev. 5660-5700 ft.
T29N R70W S20 W1/4.  42.4716 N, 105.2752 W.  
Banks along the stream channel. Phenology: flowering. 

B. E. Nelson, 42505.  8/11/1997. 		 677551
_________________________________________________________________________

188.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Archuleta County: San Juan National Forest.  Elev. 8000 ft.
T36N R1W S21.  
Steep adobe, transitional timber; with tarweed, bluestem and bluegrass. Phenology: flowering. 

Glenn Dalton, D-4.  8/29/1930. 		USFS 469659
_________________________________________________________________________

189.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Albany County: Laramie 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.  Elev. 5560-5900 ft.
T28N R71W S11 SE1/4; also NW1/4 S13 and NE1/4 S14.  42.4131 N, 105.3324 W.  
Dry canyon bottom and lower rocky slopes with scattered ponderosa pine. Phenology: flowering & fruiting. 

B. E. Nelson, 42608.  8/12/1997. 		 677550
_________________________________________________________________________

190.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Laramie Range: along Mill Creek and Esterbrook or County Road 5, ca 1 air mi W of Elk Mountain, ca 3.7 air mi NNW of Esterbrook; ca 20.5 air mi S of Douglas.  Elev. 5620 ft.
T29N R71W S20 SE1/4.  42.4716 N, 105.3932 W.  
Roadside. Phenology: flowering & fruiting. 

B. E. Nelson, 42633.  8/13/1997. 		 677549
_________________________________________________________________________

191.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Larimer County: Fort Collins: college grounds.
Waste places. Phenology: flowering & fruiting. 

J. H. Cowen, 3276.  7/24/1896. 		RM 47340
_________________________________________________________________________

192.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, El Paso County: 1 mi NE of Falcon, on Hwy 24.  Elev. 6900 ft.
T13S R64W S5.  38.9478 N, 104.581 W; uncertainty 1 mi..  
Disturbed short grass railroad prairie, in sandy soil. Phenology: fruiting. 

Kate Nelson, 2.  9/3/1985. 		RM 529353
     with Sara Mayben
_________________________________________________________________________

193.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Arapahoe County: Buckley Air Force Base: transect across the slope; west end of the transect 880 m N of southwest corner of the installation.  521144E 4393376N to 521290E 4393214N to 521319E 4393176N.  Elev. 1705 m.
zone 13, 4393376E, 521144N; GPS Reading.  
Up to 10 degree slope shortgrass prairie on silt-like loam; with Opuntia polyacantha, Artemisia frigida, Cirsium arvense, Elymus elymoides, Bouteloua gracilis, Buchloe dactyloides, Aristida purpurea, Bromus japonicus. Phenology: flowering & fruiting. 

L. Blay, 53.  8/11/2004. 		RM 793993
     with N. E. Hastings
_________________________________________________________________________

194.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Denver County: Denver.  Elev. 5200 ft.
T3S R68W; also T4S R68W.  39.74004 N, 104.98738 W; NAD 83, uncertainty 6 mi., Nat. Geog. TOPO!.  
Phenology: flowering. 

L. M. Schedin, 463.  //. 		RM 97755
     with N. T. Schedin
_________________________________________________________________________

195.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, El Paso County: 1 mi NE of Falcon, on Hwy 24.  Elev. 6900 ft.
R64W T13S S5.  38.9478 N, 104.581 W; uncertainty 1 mi..  
Disturbed short grass railroad prairie, in sandy soil. Phenology: flowering. 

Mary Butcher, 1.  9/3/1985. 		RM 529249
     with Anne Petersen
_________________________________________________________________________

196.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Arapahoe County: Buckley Air Force: south end of transect 680 m NE of the southwest corner of the installaion.  521710E 4392860N to 521321E 4393348N.  Elev. 1700-1705 m.
zone 13, 4392860E, 521710N; GPS Reading.  
Level with steep banks in cottonwood/willow (riparian) community on silt-like loam to clay loam; with Populus deltoides, Salix exigua, S. amygdaloides, Apocynum cannabinum, Glycyrrhiza lepidota, Asclepias speciosa, Poa pratensis. Phenology: fruiting. 

N. E. Hastings, 285.  9/14/2005. 		RM 793991
     with C. Bern
_________________________________________________________________________

197.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Larimer County: 1 mi E of La Porte.  Elev. 5300 ft.
Park, plowed ground; level, deep silt loam. Phenology: flowering & fruiting. 

Paul L. Ginter, 456.  8/13/1941. 		USFS 469661
_________________________________________________________________________

198.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County:   Elev. 5000 ft.
T10N R66W S12.  40.8503 N, 104.7243 W.  
Dry creek-wash. Phenology: flowering & fruiting. 

Robert M. Muir, 164.  8/13/1937. 		RM 172027
_________________________________________________________________________

199.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County:   Elev. 5000 ft.
T10N R66W S13.  40.8358 N, 104.7243 W; uncertainty 1 mi..  
Dry creekbank, sandy loam. Phenology: fruiting. 

Robert M. Muir, 220.  8/31/1937. 		RM 172028
_________________________________________________________________________

200.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Colfax County: Philmont Scout Ranch, near Cimarron: South Ponil Creek, 2 mi W of Ponil.  Elev. 7480 ft.
Moist, shaded, grassy areas. Phenology: flowering & fruiting. 

Ronald L. Hartman, 2641.  8/6/1968. 		RM 299529
_________________________________________________________________________

201.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Boulder County: Boulder Mountain Parks: Enchanted Mesa.  Elev. 5800 ft.
Dry grassland and Pinus ponderosa woodland. Phenology: flowering & fruiting. 

Tim Hogan, 1982.  8/29/1992. 		RM 577065
_________________________________________________________________________

202.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Larimer County: Eastern foothills of Colorado Front Range: adjacent to KOA Campground and U.S. Hwy 287, ca 12 air mi N of Fort Collins.
Open canopy blue grama/needle and thread shortgrass grassland and slopes. Phenology: flowering. 

Walter Fertig, 13048.  7/17/1992. 		RM 579516
_________________________________________________________________________

203.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Weld County: Natural Fort adjacent to I-25, ca 3 air mi S of Wyoming state line.  Elev. 5900 ft.
T11N R67W S6.  40.952 N, 104.9338 W; uncertainty 1 mi..  
Open canopy disturbed soil at edge of narrowleaf cottonwood grove. Phenology: flowering & fruiting. 

Walter Fertig, 13411.  8/28/1992. 		RM 580012
     with Jane Struttmann
_________________________________________________________________________

204.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Maricopa County: 14.4 mi S of Sunflower; along Hwy 87.
Juniper-Fraxinus community. Phenology: flowering & fruiting. 

N. Duane Atwood, 17128.  9/9/1991. 		RM 575976
_________________________________________________________________________

205.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Arizona, Mohave County: 2.5 mi NW of Mount Dellenbaugh and 0.5 mi W of Mociac Well.  Elev. 1805 m.
T32N R12W S28.  
Ponderosa-oak-juniper community. Phenology: flowering & fruiting. 

N. Duane Atwood, 27941.  10/10/2001. 		RM 741480
     with L. C. Higgins
_________________________________________________________________________

206.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 5.3 air mi N of Jay Em; ca 27.5 air mi N of Lingle; ca 0.5 mi E of U.S. Hwy 85 near "Five Buttes".  Elev. 4800 ft.
T30N R62W S31.  42.5378 N, 104.3574 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Barrow pits and road cuts. Phenology: fruiting. 

B. E. Nelson, 11548.  9/10/1984. 		RM 599467	Barcode: RM0231552
_________________________________________________________________________

207.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: "Five Buttes", ca 5.3 air mi of Jay Em; ca 27.5 air mi N of Lingle, just E of U.S. Hwy 85.  Elev. 4900 ft.
T30N R63W S36.  42.5349 N, 104.3632 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
Slopes of the buttes. Phenology: fruiting. 

B. E. Nelson, 11557.  9/10/1984. 		RM 599466	Barcode: RM0231553
_________________________________________________________________________

208.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Hat Creek Breaks: ridge between S Bar and East Indian Creeks, ca 1.5 air mi SW of Whitman; ca 18 air mi NE of Lusk.  Elev. 4700 ft.
T33N R61W S1.  42.8688 N, 104.1291 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Roadside. Phenology: flowering. 

B. E. Nelson, 11608.  9/10/1984. 		RM 
_________________________________________________________________________

209.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along North Laramie River, ca 15.5 air mi SE of Laramie Peak; ca 13.5 air mi NW of Wheatland.  Elev. 4800 ft.
T25N R69W S6.  42.1686 N, 105.1692 W; uncertainty 1 mi..  
Stony sandbar. Phenology: flowering & fruiting. 

B. E. Nelson, 17266.  7/19/1989. 		RM 599368	Barcode: RM0231492
     with Jan Pollet
_________________________________________________________________________

210.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Sybille Creek off Wyo Hwy 310, Palmer Canyon Road, ca 6.7 air mi W of Wheatland.  Elev. 4700-4740 ft.
T24N R69W S14.  42.0544 N, 105.0872 W; uncertainty 1 mi..  
Open cottonwood woodland on bench. Phenology: flowering. 

B. E. Nelson, 17347.  7/19/1989. 		RM 599367	Barcode: RM0231498
     with Jan Pollet
_________________________________________________________________________

211.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 7.5 air mi S of Spotted Horse, ca 28 air mi NW of Gillette along North Windmill Draw.  Elev. 4100 ft.
T53N R75W S2 NE1/4.  44.60111 N, 105.84917 W; uncertainty 1 mi..  
Loamy clay in grassy bottomland with Gutierrezia. Occasional. Phenology: fruiting. 

B. E. Nelson, 2056.  9/19/1978. 		RM 324250	Barcode: RM0231936
_________________________________________________________________________

212.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 4 air mi NW of Spotted Horse, ca 37.5 air mi NW of Gillette, breaks above Spotted Horse Creek.  Elev. 4000 ft.
T55N R75W S16 NW1/4.  44.7444 N, 105.88944 W; uncertainty 0.5 mi..  
Grassy bottom with Gutierrezia. Common. Phenology: fruiting. 

B. E. Nelson, 2083.  9/19/1978. 		RM 324249	Barcode: RM0231937
_________________________________________________________________________

213.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 42 air mi N of Gillette, ca 8 air mi S of Montana on Wyo Hwy 59, just N of Deep Creek on Little Powder River.  Elev. 3550 ft.
T57N R71W S35 SW1/4.  44.8883 N, 105.36194 W; uncertainty 0.5 mi..  
Disturbed areas with Kochia. Common. Phenology: fruiting. 

B. E. Nelson, 2133.  9/20/1978. 		RM 324255	Barcode: RM0231935
_________________________________________________________________________

214.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 13 air mi S of Rozet, ca 20.5 air mi SE of Gillette on Bishop Road along Canyon Creek.  Elev. 4400 ft.
T48N R69W S31 SW1/4.  44.0969 N, 105.19028 W; uncertainty 1 mi..  
Bottom grassland with Ceratoides and Artemisia cana. Common. Phenology: fruiting. 

B. E. Nelson, 2214.  9/21/1978. 		RM 324251	Barcode: RM0231934
_________________________________________________________________________

215.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Powder River Basin: ca 7.5 air mi NW of Bill, ca 39 air mi N of Douglas on Wyo Hwy 59 along Dry Fork of the Cheyenne River.  Elev. 4600 ft.
T39N R71W S35 N1/2.  43.3117 N, 105.3458 W; uncertainty 1 mi..  
Sandy soil in river bottom with Elymus. Frequent. Phenology: fruiting. 

B. E. Nelson, 2295.  9/22/1978. 		RM 324248	Barcode: RM0231943
_________________________________________________________________________

216.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 3 air mi W of La Grange, ca 30 air mi S of Torrington on Wyo Hwy 151, along Bear Creek.  Elev. 4600 ft.
T19N R61W S5 SW1/4.  41.6388 N, 104.2214 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
In bottomland with Gutierrezia. Common. 

B. E. Nelson, 2330.  9/25/1978. 		RM 
_________________________________________________________________________

217.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Goshen Hole: ca 1-1.5 mi SW of Torrington, S of golf course along North Platte River.  Elev. 4100 ft.
T24N R61W S17 NE1/4.  42.0549 N, 104.2132 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
In sandy soil in river bottom with Heterotheca and Panicum. Common. Phenology: fruiting. 

B. E. Nelson, 2366.  9/26/1978. 		RM 317796	Barcode: RM0231938
_________________________________________________________________________

218.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Goshen Hole: ca 9 air mi SE of Torrington, ca 1 air mi SW of Henry, Nebraska on north side of North Platte River.  Elev. 4050 ft.
T23N R60W S3 SE1/4.  41.9882 N, 104.0571 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Clay in the river bottom with Solidago and Panicum. Common. Phenology: fruiting. 

B. E. Nelson, 2410.  9/26/1978. 		RM 317795	Barcode: RM0231941
_________________________________________________________________________

219.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 7 air mi NE of Lingle, ca 11 air mi NNW of Torrington, ca 2 mi E of U.S. Hwy 85 on Kettle Rock Road along Rawhide Creek.  Elev. 4400 ft.
T26N R62W S24 NW1/4.  42.218 N, 104.2597 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
In bottomland with Hordeum. Common. Phenology: fruiting. 

B. E. Nelson, 2425.  9/27/1978. 		RM 317794	Barcode: RM0231942
_________________________________________________________________________

220.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 5.5 air mi WSW of Jay Em, ca 30.5 air mi NW of Torrington, at Muskrat Creek, just S of Ft. Laramie Road.  Elev. 4750 ft.
T29N R63W S31 NW1/4.  42.4473 N, 104.4774 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
In sandy bottomland with Aster and Gutierrezia. Abundant. Phenology: fruiting. 

B. E. Nelson, 2446.  9/27/1978. 		RM 317793	Barcode: RM0231939
_________________________________________________________________________

221.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Goshen Hole: Springer Reservoir (Goshen Hole Reservoir) ca 1.5 air mi S of Yoder, ca 13.5 air mi SSW of Torrington.  Elev. 4300 ft.
T22N R62W S10 NE1/4.  41.8968 N, 104.301 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Upland with Artemisia filifolia and Senecio. Abundant. Phenology: fruiting. 

B. E. Nelson, 2473.  9/28/1978. 		RM 317792	Barcode: RM0231940
_________________________________________________________________________

222.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: Horse Creek Ranch, ca 9 air mi NW of Weston.  Elev. 4000 ft.
T55N R72W S26.  44.72083 N, 105.4825 W; uncertainty 1 mi..  
Eroded uplands, ponderosa pine ridges, ravines, sagebrush plains, open clayey slopes, loose talus; plains. Phenology: flowering. 

Keith H. Dueholm, 3541.  7/8/1978. 		RM 324259	Barcode: RM0231529
     with Mary Alice Sanguinetti
_________________________________________________________________________

223.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 10 road mi NNW of Gillette.  Elev. 4300 ft.
T52N R73W S36.  44.44167 N, 105.5825 W; uncertainty 1 mi..  
Rolling plains, sandstone uplift, outcrops, sandy ravines, highway right-of-way; plains. Phenology: flowering. 

Keith H. Dueholm, 3722.  7/9/1978. 		RM 324260	Barcode: RM0231540
     with Mary Alice Sanguinetti
_________________________________________________________________________

224.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: grounds of Agricultural Experiment Station, ca 1/4 mi E of Gillette.  Elev. 4500 ft.
T50N R72W S25.  44.28361 N, 105.4617 W; uncertainty 1 mi..  
Plantations, small section of plains, knolls; openings. Phenology: flowering. 

Keith H. Dueholm, 4425.  7/21/1978. 		RM 324257	Barcode: RM0231530
_________________________________________________________________________

225.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 4 air mi ENE of Adonis.  Elev. 4100 ft.
T52N R69W S5; also T53N R69W S32 and S33.  44.5186 N, 105.1825 W; uncertainty 2 mi..  
Sagebrush plains, ponderosa pine slopes, ravines, eroded slopes, creek bottom; slopes. Phenology: buds. 

Keith H. Dueholm, 4652.  7/23/1978. 		RM 324253	Barcode: RM0231538
_________________________________________________________________________

226.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 6 air mi SSE of Gillette.  Elev. 4800 ft.
T49N R71W S30.  44.19611 N, 105.4406 W; uncertainty 1 mi..  
Scoria topped butte, loose talus slopes, plains; ditch. Phenology: buds. 

Keith H. Dueholm, 5137.  7/28/1978. 		RM 324256	Barcode: RM0231533
_________________________________________________________________________

227.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: along Dry Fork Spring Creek, ca 3.5 air mi NE of Soda Wells.  Elev. 3900 ft.
T54N R70W S10; also S11.  44.6781 N, 105.2594 W; uncertainty 2 mi..  
Sagebrush plains, draw, bottoms along creek, cottonwood, plum thickets; plains. Phenology: flowering & fruiting. 

Keith H. Dueholm, 5446.  8/5/1978. 		RM 324252	Barcode: RM0231537
_________________________________________________________________________

228.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 3 air mi SE of Wyodak.  Elev. 4600 ft.
T49N R71W S11.  44.2403 N, 105.35861 W; uncertainty 1 mi..  
Rolling plains, sandy roadcut; plains. Phenology: flowering. 

Keith H. Dueholm, 5816.  8/9/1978. 		RM 324254	Barcode: RM0231535
_________________________________________________________________________

229.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Johnson County: Powder River Basin: ca 19 air mi NE of Buffalo.  Elev. 4200 ft.
T52N R79W S10.  44.49306 N, 106.3508 W; uncertainty 1 mi..  
Wooded draw, plains; roadfill, along draw. Phenology: flowering. 

Keith H. Dueholm, 5903.  8/10/1978. 		RM 324245	Barcode: RM0231531
_________________________________________________________________________

230.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Sheridan County: Powder River Basin: ca 3 mi N of Leiter.  Elev. 4200 ft.
T55N R78W S9.  44.75389 N, 106.2553 W; uncertainty 1 mi..  
Dry plains, slopes; plains. Phenology: flowering & fruiting. 

Keith H. Dueholm, 5920.  8/11/1978. 		RM 324244	Barcode: RM0231534
_________________________________________________________________________

231.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Campbell County: Powder River Basin: Dry Trail Creek, along Trail Creek Road, 3.8 road mi E of Wyo Hwy 59.  Elev. 3600 ft.
T58N R70W S33.  44.97556 N, 105.2794 W; uncertainty 1 mi..  
Sandy cuts in plains, small stream and draw; cuts. Phenology: flowering & fruiting. 

Keith H. Dueholm, 6121.  8/25/1978. 		RM 324258	Barcode: RM0231539
_________________________________________________________________________

232.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Johnson County: Powder River Basin: Jack Moore Reservoir, along Boxelder Creek, ca 1.5 air mi E of south end of Lake De Smet.  Elev. 4500 ft.
T52N R82W S23; also S26.  44.4619 N, 106.69333 W; uncertainty 2 mi..  
Flats around margin of holding pond, meadow along creek, gravelly roadside, hilly plains on clinker; flats. Phenology: flowering & fruiting. 

Keith H. Dueholm, 8637.  8/3/1979. 		RM 333364	Barcode: RM0231536
_________________________________________________________________________

233.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: plains S of head of West Kellehan Creek on Sorenson or County Road 156, ca 5.7 air mi WNW of Albin; ca 38 air mi NE of Cheyenne.  Elev. 5425 ft.
T17N R61W S16 SW1/4.  41.4372 N, 104.2077 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Rangeland subjected to "improvement". Phenology: buds. 

B. E. Nelson, 26926.  7/18/1993. 		RM 599366	Barcode: RM0231548
_________________________________________________________________________

234.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern 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.  Elev. 4340-4400 ft.
T27N R66W S27 SE1/4.  42.285 N, 104.7633 W.  
Dry disturbed area above the river. Phenology: flowering & fruiting. 

B. E. Nelson, 27587.  7/26/1993. 		RM 599365	Barcode: RM0231493
_________________________________________________________________________

235.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern 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.  Elev. 4400-4450 ft.
T37N R67W S3 SW1/4.  43.21 N, 104.8908 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Sand bars, flats, and low benches along stream channel. Phenology: buds. 

B. E. Nelson, 27987.  7/30/1993. 		RM 599364	Barcode: RM0231554
_________________________________________________________________________

236.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: Haystack Range: Hell Gap and vicinity on Whalen Canyon or County Road 202, ca 10 air mi NE of Guernsey; ca 14.5 air mi NW of Fort Laramie.  Elev. 5060-5240 ft.
T28N R65W S15 S1/2.  42.3982 N, 104.6416 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Sandy meadow in ponderosa pine forest. Phenology: flowering. 

B. E. Nelson, 28105.  8/2/1993. 		RM 599363	Barcode: RM0231497
_________________________________________________________________________

237.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: along Wyo Hwy 159, ca 5.5 air mi N of Torrington; ca 7.5 air mi E of Lingle.  Elev. 4290-4350 ft.
T25N R61W S16 NW1/4.  42.1422 N, 104.2013 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Rolling sandy plains of sand sage-grassland. Phenology: flowering. 

B. E. Nelson, 28227.  8/3/1993. 		RM 599362	Barcode: RM0231545
_________________________________________________________________________

238.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: Southern 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.  Elev. 5400-5480 ft.
T19N R66W S11 NW1/4.  41.63378 N, 104.74519 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Sandy slopes and plains above the creek. Phenology: flowering & fruiting. 

B. E. Nelson, 28541.  8/17/1993. 		RM 599361	Barcode: RM0231549
_________________________________________________________________________

239.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern 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.  Elev. 5160-5180 ft.
T19N R65W S14 NE1/4.  41.6166 N, 104.6186 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Sandy flats between the creeks and bluffs. Phenology: flowering & fruiting. 

B. E. Nelson, 28633.  8/17/1993. 		RM 599360	Barcode: RM0231555
_________________________________________________________________________

240.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along a tributary of Twentymile Creek on Manning or County Road 53, ca 24.5 air mi NE of Douglas; ca 14 air mi N of Lost Springs.  Elev. 4800 ft.
T35N R68W S36 SW1/4.  42.9667 N, 104.9625 W.  
Benches and banks along drainage channel. Phenology: fruiting. 

B. E. Nelson, 28974.  8/22/1993. 		RM 599359	Barcode: RM0231494
_________________________________________________________________________

241.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Lance Creek off Lance Creek or County Road 14, ca 7.3 air mi N of Lance Creek; ca 27.5 air mi NNW of Lusk.  Elev. 4170-4200 ft.
T37N R65W S36 SW1/4.  43.1378 N, 104.617 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Sandy plains. Phenology: flowering & fruiting. 

B. E. Nelson, 29008.  8/22/1993. 		RM 599358	Barcode: RM0231486
_________________________________________________________________________

242.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Converse County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along the North Platte River ca 0.5-0.8 mi above the mouth of Wagon Hound Creek, ca 6.8 air mi S of Douglas.  Elev. 4740 ft.
T31N R71W S16 N1/4.  42.6569 N, 105.3725 W; uncertainty 1 mi..  
Open flats above the river. Phenology: fruiting. 

B. E. Nelson, 29251.  8/26/1993. 		RM 599357	Barcode: RM0231490
_________________________________________________________________________

243.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Hat Creek Breaks: between S Bar or County Road 62 and S Bar Creek, ca 18 air mi NE of Lusk; ca 15 air mi N of Van Tassell.  Elev. 4540-4720 ft.
T34N R61W S36 SE1/4.  42.877 N, 104.1291 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Sandy slopes with sandstone outcrops and scattered ponderosa pine. Phenology: flowering & fruiting. 

B. E. Nelson, 29426.  8/29/1993. 		RM 599356	Barcode: RM0231561
_________________________________________________________________________

244.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Indian Creek off Hat Creek or County Road 64, ca 16 air mi NE of Lusk; ca 19.8 air mi NW of Van Tassell.  Elev. 4280-4300 ft.
T34N R61W S18 N1/4.  42.9287 N, 104.2273 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Disturbed areas in the creek bottom. Phenology: fruiting. 

B. E. Nelson, 29484.  8/29/1993. 		RM 599355	Barcode: RM0231560
_________________________________________________________________________

245.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: along North Platte River just below mouth of Laramie River, at east edge of Fort Laramie National Historic Site, ca 1.3 air mi SSW of Fort Laramie; ca 20 air mi WNW of Torrington.  Elev. 4220-4240 ft.
T26N R64W S27 South1/2.  42.1965 N, 104.5296 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Cottonwood woodland in the river bottom. Phenology: fruiting. 

B. E. Nelson, 29565.  8/31/1993. 		RM 599354	Barcode: RM0231557
_________________________________________________________________________

246.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: along the North Platte River on London Flats, ca 2.2 air mi S of Lingle, ca 9.5 air mi WNW of Torrington.  Elev. 4140 ft.
T25N R62W S30 SW1/4.  42.1072 N, 104.3566 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Drier flats in the river bottom. Phenology: fruiting. 

B. E. Nelson, 29660.  8/31/1993. 		RM 599490	Barcode: RM0231489
_________________________________________________________________________

247.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Bushnell Creek, ca 3 air mi upstream from Horse Creek, ca 6 air mi NNW of Albin; ca 22.5 air mi N of Pine Bluffs.  Elev. 4860-4960 ft.
T18N R61W S25 NE1/4.  41.5018 N, 104.1333 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Under junipers and boxelders above the creek. Phenology: fruiting. 

B. E. Nelson, 29703.  9/23/1993. 		RM 599489	Barcode: RM0231550
_________________________________________________________________________

248.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: 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.  Elev. 4660-4780 ft.
T19N R61W S36.  41.5708 N, 104.1408 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
Gullies and steep slopes along the creek. Phenology: fruiting. 

B. E. Nelson, 29727.  9/23/1993. 		RM 599488	Barcode: RM0231483
_________________________________________________________________________

249.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: Wyoming Game and Fish Table Mountain Wildlife Habitat Management Area: ca 2 mi W of Table Mountain; ca 8.5 air mi NE of Hawk Springs; ca 14.5 air mi S of Torrington.  Elev. 4150 ft.
T22N R61W S24 SW1/4.  41.8579 N, 104.1448 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Disturbed and reseeded areas above the marshes. Phenology: fruiting. 

B. E. Nelson, 29753.  9/24/1993. 		RM 599487	Barcode: RM0231488
_________________________________________________________________________

250.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: between Horse Creek and Table Mountain on Wyoming Game and Fish Table Mountain Wildlife Habitat Management Area, ca 4 air mi SSE of Huntley; ca 14 air mi S of Torrington.  Elev. 4120-4160 ft.
T22N R60W S18.  41.8756 N, 104.1193 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
Moist to wet disturbed area. Phenology: fruiting. 

B. E. Nelson, 29772.  9/24/1993. 		RM 599486	Barcode: RM0231487
_________________________________________________________________________

251.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: off Sheep Creek or County Road 43 ca 3.5-4 air mi ENE of Torrington.  Elev. 4200-4250 ft.
T24N R60W S5 SW1/4.  42.0789 N, 104.1049 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Flats in the sand hills. Phenology: fruiting. 

B. E. Nelson, 29792.  9/27/1993. 		RM 599485	Barcode: RM0230489
_________________________________________________________________________

252.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: Wyoming Game and Fish Rawhide Wildlife Management Area: along a channel of the North Platte River from Rawhide Creek downstream ca 2/3 mi, ca 5.3-6 air mi WNW of Torrington.  Elev. 4130 ft.
T25N R62W S33 N1/2.  42.0961 N, 104.3142 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
In a two track through the floodplain. Phenology: fruiting. 

B. E. Nelson, 29860.  9/27/1993. 		RM 599331	Barcode: RM0231556
_________________________________________________________________________

253.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Fort Laramie or County Road 8, ca 3.8 air mi NNE of Fort Laramie; ca 21.3 air mi NW of Torrington.  Elev. 4480-4520 ft.
T27N R64W S36 SW1/4.  42.2649 N, 104.4931 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Shallow swale in mixed grass plains. Phenology: fruiting. 

B. E. Nelson, 29872.  9/27/1993. 		RM 599330	Barcode: RM0231558
_________________________________________________________________________

254.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: McMaster Reservoir on the Niobrara River just N of U.S. Hwy 20, ca 2.5 air mi W of Van Tassell; ca 17.3 air mi SE of Lusk.  Elev. 4750-4770 ft.
T31N R61W S13 NW1/4.  42.6686 N, 104.1404 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
Sandy slopes and adjacent flats above the reservoir. Phenology: fruiting. 

B. E. Nelson, 29901.  9/29/1993. 		RM 599329	Barcode: RM0231559
_________________________________________________________________________

255.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Hat Creek Breaks: along an old section of U.S. Hwy 18 and 85, ca 3.3 air mi SSW of Hat Creek, ca 9.7 air mi NNE of Lusk.  Elev. 4800-5000 ft.
T34N R63W S27 NE1/4.  42.8943 N, 104.4071 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
Road banks along abandoned highway. Phenology: fruiting. 

B. E. Nelson, 29925.  9/29/1993. 		RM 599328	Barcode: RM0231484
_________________________________________________________________________

256.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Old Woman Creek at old crossing of U.S. Hwy 18/85, ca 1.5 mi W of south end of Old Woman Creek Hills, ca 15 air mi ENE of Lance Creek; ca 23.5 air mi NNE of Lusk.  Elev. 4120 ft.
T36N R63W S24 NE1/4.  43.0885 N, 104.3621 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
Meadows and low flats in the creek bottom. Phenology: fruiting. 

B. E. Nelson, 29948.  9/29/1993. 		RM 599327	Barcode: RM0231485
_________________________________________________________________________

257.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: Sandy Beach along Guernsey Reservoir in Guernsey State Park, ca 4 air mi NW of Guernsey.  Elev. 4440 ft.
T27N R66W S17 SW1/4.  42.3139 N, 104.8028 W; uncertainty 0.5 mi..  
Sandy sagebrush-grassland. Phenology: fruiting. 

B. E. Nelson, 30063.  10/1/1993. 		RM 599326	Barcode: RM0231491
_________________________________________________________________________

258.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: in the canyon along Spring Creek, ca 34 air mi NNW of Cheyenne; ca 11 air mi ENE of Farthing (Iron Mountain).  Elev. 6020-6220 ft.
T19N R68W S21 NW1/4.  41.6096 N, 105.0167 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
Canyon bottom along a sandy wash. Phenology: flowering. 

B. E. Nelson, 32551.  7/8/1994. 		RM 663664	Barcode: RM0231904
_________________________________________________________________________

259.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern 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.  Elev. 5050-5160 ft.
T30N R64W S15 SE1/4.  42.5699 N, 104.5224 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Moist to dry flats above the wash. Phenology: flowering. 

B. E. Nelson, 32674.  7/11/1994. 		RM 663663	Barcode: RM0231882
_________________________________________________________________________

260.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: along a triburtary of Silver Springs Creek on Silver Springs or County Road 54, ca 8.5 air mi SSW of Lusk.  Elev. 5340-5500 ft.
T31N R64W S22 NE1/4.  42.6506 N, 104.5218 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
Roadcut through sandstone knoll. Phenology: flowering. 

B. E. Nelson, 32728.  7/11/1994. 		RM 663662	Barcode: RM0231902
_________________________________________________________________________

261.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern 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.  Elev. 4240-4260 ft.
T26N R64W S28 SW1/4.  42.1961 N, 104.5516 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Sandy lowlands. Phenology: flowering & fruiting. 

B. E. Nelson, 33099.  7/20/1994. 		RM 663661	Barcode: RM0231896
     with David Reilly and Jim Cahill
_________________________________________________________________________

262.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern 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.  Elev. 4980 ft.
T19N R64W S14 NE1/4.  41.6197 N, 104.5039 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Sandy flats in the creek bottom with patches of snowberry, chokecherry or boxelder. Phenology: flowering & fruiting. 

B. E. Nelson, 33288.  8/2/1994. 		RM 663660	Barcode: RM0231897
     with Tim Chumley and Robbin Romberg
_________________________________________________________________________

263.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Chugwater Creek, ca 4 air mi SW of Chugwater, ca 22.5 air mi S of Wheatland.  Elev. 5400-5420 ft.
T20N R67W S4 SE1/4.  41.7349 N, 104.8913 W.  
Steep creek banks and flats above near hay field. Phenology: flowering. 

B. E. Nelson, 33351.  8/3/1994. 		RM 663659	Barcode: RM0231903
     with Tim Chumley and Robbin Romberg
_________________________________________________________________________

264.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Chugwater Creek SE of Degans Butte, ca 7.5-8.5 air mi SW of Chugwater; ca 25 air mi S of Wheatland.  Elev. 5540-5580 ft.
T20N R68W S24.  41.6911 N, 104.9492 W.  
Steep banks along the creek. Phenology: flowering. 

B. E. Nelson, 33374.  8/3/1994. 		RM 663658	Barcode: RM0231890
     with Tim Chumley and Robbin Romberg
_________________________________________________________________________

265.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: along the Laramie River E of the fort ca 2.5 air mi WSW of Fort Laramie (town); ca 21 air mi WNW of Torrington.  Elev. 4240 ft.
T26N R64W S28 NE1/4.  42.2004 N, 104.5421 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Cobblestone gravel bar. Phenology: flowering. 

B. E. Nelson, 33564.  8/8/1994. 		RM 663700	Barcode: RM0231899
     with David Reilly
_________________________________________________________________________

266.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: along the Laramie River E of the fort ca 2.5 air mi WSW of Fort Laramie (town); ca 21 air mi WNW of Torrington.  Elev. 4240 ft.
T26N R64W S28 NE1/4.  42.2004 N, 104.5421 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Cobblestone gravel bar. Phenology: flowering & fruiting. 

B. E. Nelson, 33571.  8/8/1994. 		RM 663699	Barcode: RM0231887
     with David Reilly
_________________________________________________________________________

267.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Richeau Creek between I-25 and Wyo Hwy 314, ca 3/4 air mi W to 1.5 air mi WSW of Slater; ca 14 air mi SSE of Wheatland.  Elev. 5020-5080 ft.
T22N R67W S24 NW1/4; also NE1/4 S23.  41.864 N, 104.8377 W.  
Large, coarse sand sand bar. Phenology: flowering. 

B. E. Nelson, 33797.  8/11/1994. 		RM 663698	Barcode: RM0231888
     with Tim Chumley and Robbin Romberg
_________________________________________________________________________

268.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Chugwater Creek, ca 0.5 air mi N of Bordeaux, ca 9.5 air mi SE of Wheatland.  Elev. 4840 ft.
T23N R67W S25 NW1/4.  41.9373 N, 104.8377 W.  
Steep creek bank and sand bars. Phenology: flowering. 

B. E. Nelson, 33845.  8/11/1994. 		RM 663697	Barcode: RM0231901
     with Tim Chumley and Robbin Romberg
_________________________________________________________________________

269.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along the Laramie River above and below Chugwater Creek and along Chugwater Creek, ca 7.5 air mi NE of Wheatland.  Elev. 4420-4440 ft.
T25N R67W S23 & S24.  42.1256 N, 104.8583 W; uncertainty 1 mi..  
Riparian benches, streambanks and adjacent meadows. Phenology: flowering. 

B. E. Nelson, 33879.  8/12/1994. 		RM 663696	Barcode: RM0231894
     with Tim Chumley and Robbin Romberg
_________________________________________________________________________

270.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Rocky Hollow between Bear and Horse creeks, ca 1/2-3/4 air mi N of Laramie County, ca 15 air mi WSW of La Grange; ca 36 air mi SSW of Torrington.  Elev. 5180-5220 ft.
T19N R63W S33 NW1/4.  41.5754 N, 104.4355 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Roadside and adjacent right-of-way. Phenology: flowering & fruiting. 

B. E. Nelson, 34097.  8/18/1994. 		RM 663695	Barcode: RM0231891
_________________________________________________________________________

271.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 0.5 mi S of Horseshoe Creek along Horseshoe Creek or County Road 59 ca 15.5 air mi SW of Glendo; ca 27.5 air mi NNW of Wheatland.  Elev. 4880-4960 ft.
T29N R69W S33 SE1/4.  42.4426 N, 105.1375 W.  
At the edge of pavement and on the right-of-way. Phenology: flowering. 

B. E. Nelson, 34272.  8/23/1994. 		RM 663693	Barcode: RM0231889
_________________________________________________________________________

272.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 0.5 mi S of Horseshoe Creek along Horseshoe Creek or County Road 59 ca 15.5 air mi SW of Glendo; ca 27.5 air mi NNW of Wheatland.  Elev. 4880-4960 ft.
T29N R69W S33 SE1/4.  42.4426 N, 105.1375 W.  
At the edge of pavement and on the right-of-way. Phenology: flowering. 

B. E. Nelson, 34272.  8/23/1994. 		RM 663694	Barcode: RM0231900
_________________________________________________________________________

273.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: Bump-Sullivan Reservoir, ca 4 air mi S of Yoder; ca 15 air mi SSW of Torrington.  Elev. 4290 ft.
T22N R62W S21 South1/2.  41.8615 N, 104.3114 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
At the high water line along the reservoir. Phenology: flowering & fruiting. 

B. E. Nelson, 34512.  8/28/1994. 		RM 705640	Barcode: RM0231495
_________________________________________________________________________

274.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Niobrara County: 7 mi SE of Mule Creek Junction.  Elev. 4000 ft.
T39N R60W S31 SW1/4 of SW1/4.  43.3128 N, 104.1117 W; uncertainty 0.25 mi..  
Roadside with Grindelia and Helianthus. Phenology: buds. 

Robert D. Dorn, 8116.  9/3/1999. 		RM 643032
_________________________________________________________________________

275.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Wyo Hwy 34, ca 4 air mi E of Albany County.  Elev. 5260 ft.
T22N R70W S11 E1/2.  41.895 N, 105.2133 W; uncertainty 1 mi..  
Sandy plains with short-grass prairie. Phenology: buds. 

Ronald L. Hartman, 39754.  7/4/1993. 		RM 599325	Barcode: RM0231513
_________________________________________________________________________

276.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Wheatland Reservoir 1, 6 air mi SW of Wheatland.  Elev. 4900 ft.
T23N R68W S6 NE1/4.  41.9364 N, 105.0489 W; uncertainty 0.5 mi..  
Sandy plains and slopes with adjacent irrigation canals. Phenology: flowering. 

Ronald L. Hartman, 39861.  7/4/1993. 		RM 599324	Barcode: RM0231528
_________________________________________________________________________

277.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Johnson Reservoir 3, ca 6 air mi NNW of Wheatland.  Elev. 4500 ft.
T25N R68W S22 N1/2.  42.1256 N, 104.995 W.  
Sandy slopes and lake margin. Phenology: flowering. 

Ronald L. Hartman, 39991.  7/4/1993. 		RM 599323	Barcode: RM0231508
_________________________________________________________________________

278.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Wyo Hwy 34 and I-25 interchange, ca 7 mi S of Wheatland.  Elev. 4900 ft.
T23N R68W S13 E1/2.  41.9675 N, 104.9517 W.  
Sandy slopes and stream bottom. Phenology: flowering. 

Ronald L. Hartman, 40629.  7/11/1993. 		RM 599322	Barcode: RM0231509
_________________________________________________________________________

279.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 2 mi E of Slater on breaks.  Elev. 4900-5300 ft.
T22N R66W S16; also N1/4 S21.  41.8783 N, 104.7867 W.  
Sandstone outcrops and sandy slopes. Phenology: buds. 

Ronald L. Hartman, 40704.  7/11/1993. 		RM 599321	Barcode: RM0231512
_________________________________________________________________________

280.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 7 air mi SW of Chugwater, on breaks west of railroad.  Elev. 5900 ft.
T20N R67W S18 SW1/4.  41.7047 N, 104.9325 W; uncertainty 1 mi..  
Sandy slopes. Phenology: buds. 

Ronald L. Hartman, 40947.  7/11/1993. 		RM 599320	Barcode: RM0231511
_________________________________________________________________________

281.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Laramie County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along the bed of Crow Creek from County Road 203 ca 1.5 mi downstream, ca 1 air mi SW of Carpenter; ca 23.6 air mi ESE of Cheyenne.  Elev. 5390-5400 ft.
T12N R63W S1 E1/2; also NE1/4 S12.  41.0335 N, 104.3774 W; uncertainty 0.75 mi..  
Dry sandy-gravelly creek bed and dry slopes and flats above the creek bed. Phenology: flowering & fruiting. 

Timothy W. Chumley, 205.  8/18/1994. 		RM 663692	Barcode: RM0231892
_________________________________________________________________________

282.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: along Horse Creek between County Road 180 and County Road 182, ca 1/2 air mi E of Hawk Springs, ca 19.3 air mi SSW of Torrington.  Elev. 4320-4340 ft.
T21N R62W S13 E1/2.  41.791 N, 104.2552 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
Along open banks of creek, in grazed pasture and along irrigation ditches in the pasture. Phenology: flowering & fruiting. 

Timothy W. Chumley, 299.  8/24/1994. 		RM 663691	Barcode: RM0231893
_________________________________________________________________________

283.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: along Horse Creek ca 5 air mi N of Hawk Springs; ca 13.5 air mi SSW of Torrington.  Elev. 4240-4250 ft.
T22N R62W S24 N1/2.  41.8669 N, 104.2601 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Along sandy-clay shores of heavily grazed creek. Phenology: flowering. 

Timothy W. Chumley, 332.  8/24/1994. 		RM 663690	Barcode: RM0231895
_________________________________________________________________________

284.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: along Bear Creek ca 1 air mi W of Wyo Hwy 151 crossing, ca 10 air mi S of Hawk Springs, ca 46 air mi NE of Cheyenne.  Elev. 4770-4780 ft.
T19N R61W S6 South1/2; also NW1/4 NW1/4 S8.  41.639 N, 104.2328 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
Along wooded and entrenched stream with steep to vertical banks. Phenology: flowering. 

Timothy W. Chumley, 423.  8/26/1994. 		RM 663689	Barcode: RM0231898
_________________________________________________________________________

285.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountains: Reuter Campground, ca 3 air mi NW of Sundance.  Elev. 3400 ft.
T54N R60W S19.  44.6567 N, 104.0981 W; uncertainty 1 mi..  
Edge of road. Phenology: flowering & fruiting. 

B. E. Nelson, 11697.  9/12/1984. 		RM 371531	Barcode: RM0231932
_________________________________________________________________________

286.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountains: along Pine Creek, ca 8 air mi NNW of Aladdin; ca 25 air mi NNE of Sundance.  Elev. 3500 ft.
T55N R62W S24.  44.7447 N, 104.245 W; uncertainty 1 mi..  
Disturbed areas. Phenology: fruiting. 

B. E. Nelson, 11784.  9/12/1984. 		RM 371530	Barcode: RM0231931
_________________________________________________________________________

287.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountains: along a canyon leading into Beaver Creek, ca 0.8 air mi NW of Alva, ca 7.5 air mi ENE of Hulett.  Elev. 4100 ft.
T54N R63W S5.  44.6975 N, 104.4475 W; uncertainty 1 mi..  
Meadow above the canyon. Phenology: flowering & fruiting. 

B. E. Nelson, 11901.  9/13/1984. 		RM 371529	Barcode: RM0231930
_________________________________________________________________________

288.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: along Boundary Gulch, ca 5 air mi SSE of Beulah, ca 16 air mi ENE of Sundance.  Elev. 4400 ft.
T52N R60W S28.  44.4661 N, 104.0622 W; uncertainty 1 mi..  
Roadside. Phenology: fruiting. 

B. E. Nelson, 11951.  9/16/1984. 		RM 371528	Barcode: RM0231928
_________________________________________________________________________

289.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Belle Fourche River, ca 1.8 air mi W of Devils Tower Junction, ca 19.5 air mi NE of Moorcroft on Inyan Kara Road.  Elev. 4000 ft.
T52N R66W S13.  44.4911 N, 104.7325 W; uncertainty 1 mi..  
Sandy slope between the river and cliffs. Phenology: fruiting. 

B. E. Nelson, 12028.  9/18/1984. 		RM 371527	Barcode: RM0231929
_________________________________________________________________________

290.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Belle Fourche River just below Keyhole Dam, ca 12 air mi NE of Moorcroft.  Elev. 4000 ft.
T51N R66W S22.  44.3908 N, 104.7694 W; uncertainty 1 mi..  
Sandy flats along river. Phenology: flowering & fruiting. 

B. E. Nelson, 12040.  9/18/1984. 		RM 371526	Barcode: RM0231925
_________________________________________________________________________

291.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountains: Planting Spring, ca 2.4 air mi E of Alva, ca 10.4 air mi E of Hulett.  Elev. 4700 ft.
T54N R63W S2.  44.6983 N, 104.38722 W; uncertainty 1 mi..  
On old beaver dams. Phenology: fruiting. 

B. E. Nelson, 12159.  9/20/1984. 		RM 371525	Barcode: RM0231926
_________________________________________________________________________

292.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountains: Harding Gulch, ca 6.5 air mi NE of Alva, ca 12.8 air mi NE of Hulett.  Elev. 4100 ft.
T55N R63W S2.  44.7847 N, 104.3886 W; uncertainty 1 mi..  
South-facing slope with scattered ponderosa pine. Phenology: fruiting. 

B. E. Nelson, 12169.  9/20/1984. 		RM 371524	Barcode: RM0231927
_________________________________________________________________________

293.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Little Missouri River Breaks: ca 14 air mi N of Hulett; ca 33.5 air mi NNW of Sundance.  Elev. 4000 ft.
T56N R64W S3.  44.8731 N, 104.5289 W; uncertainty 1 mi..  
Disturbed areas. Phenology: buds. 

B. E. Nelson, 9010.  7/12/1982. 		RM 371532	Barcode: RM0231933
_________________________________________________________________________

294.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Devils Tower, Little Missouri Butte  Elev. 3900-4300 ft.
T53N R66W S2.  44.5931 N, 104.71 W; uncertainty 2 mi..  
*sheet. Phenology: flowering & fruiting. 

David Griffiths, s.n..  8/13/1897. 		RM 68195	Barcode: RM0231527
     with L. W. Carter
_________________________________________________________________________

295.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Black Hills: Thoeming Draw, east side of LAK Reservoir, ca 5.5 air mi ESE of Newcastle.  Elev. 4400 ft.
T45N R60W S31.  43.8358 N, 104.10611 W; uncertainty 1 mi..  
Disturbed soil near lake. Phenology: flowering. 

Hollis Marriott, 1868.  8/5/1982. 		RM 371548	Barcode: RM0231741
_________________________________________________________________________

296.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Goldie Divide near junction of Goldie and New Haven roads; ca 5 air mi NW of Hulett.  Elev. 4500 ft.
T55N R65W S28; also S29.  44.72333 N, 104.67028 W; uncertainty 2 mi..  
Ponderosa pine-bur oak forest, roadside. Phenology: flowering. 

Hollis Marriott, 5231.  8/2/1983. 		RM 371547	Barcode: RM0231736
_________________________________________________________________________

297.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Coal Divide just N of 1-90 (near parking area); ca 9 air mi SW of Sundance.  Elev. 4800 ft.
T50N R64W S14 NW1/4.  44.31972 N, 104.50806 W; uncertainty 0.5 mi..  
Roadside. Phenology: flowering. 

Hollis Marriott, 5529.  8/4/1983. 		RM 371546	Barcode: RM0231738
_________________________________________________________________________

298.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: headwaters of Bitter Creek, ca 2.5 air mi WNW of Alva.  Elev. 4100 ft.
T55N R64W S36 NE1/4.  44.7111 N, 104.4845 W.  
Grassland. Phenology: flowering. 

Hollis Marriott, 5671b.  8/22/1983. 		RM 371545	Barcode: RM0231924
_________________________________________________________________________

299.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Belle Fourche River near Mona; ca 14.5 air mi NNE of Hulett.  Elev. 3500 ft.
T56N R63W S15 E1/2.  44.84361 N, 104.40528 W; uncertainty 1 mi..  
Disturbed grassland near river. Phenology: flowering & fruiting. 

Hollis Marriott, 5852.  8/29/1983. 		RM 371544	Barcode: RM0231923
_________________________________________________________________________

300.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Belle Fourche River near Mona, ca 14.5 air mi NNE of Hulett.  Elev. 3500 ft.
T56N R63W S15 E1/2.  44.8436 N, 104.4053 W; uncertainty 1 mi..  
Disturbed grassland near river. Phenology: flowering & fruiting. 

Hollis Marriott, 5852.  8/29/1983. 		RM 371554
_________________________________________________________________________

301.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Tributary of Spring Creek near northwest end of Dakota Divide, ca 14.5 air mi NNE of Moorcroft.  Elev. 4200 ft.
T52N R66W S32 NW1/4.  44.4472 N, 104.8117 W; uncertainty 1 mi..  
Grassland with scattered pines, south and west-facing slopes. Phenology: flowering & fruiting. 

Hollis Marriott, 6004.  9/1/1983. 		RM 371543	Barcode: RM0231743
_________________________________________________________________________

302.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Tributary of Spring Creek near northwest end of Dakota Divide, ca 14.5 air mi NNE of Moorcroft.  Elev. 4200 ft.
T52N R66W S32 NW1/4.  44.4472 N, 104.8117 W; uncertainty 1 mi..  
Disturbed sandy soil in grassland. Phenology: fruiting. 

Hollis Marriott, 6020.  9/1/1983. 		RM 371542	Barcode: RM0231744
_________________________________________________________________________

303.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Keyhole Reservoir, Cottonwood Creek and Dry Cove Campground, ca 11.5 air mi NE of Moorcroft.  Elev. 4100 ft.
T51N R66W S34 NE1/4.  44.3619 N, 104.7694 W; uncertainty 1 mi..  
Grassland. Phenology: fruiting. 

Hollis Marriott, 6079.  9/1/1983. 		RM 371541	Barcode: RM0231742
_________________________________________________________________________

304.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Black Hills: West Plum Creek ca 1 mi N of confluence with East Plum Creek, ca 8 air mi NNW of Newcastle.  Elev. 4700 ft.
T46N R62W S14.  43.9661 N, 104.2678 W; uncertainty 1 mi..  
Grassland in canyon botton, on sandy soil. Phenology: flowering. 

Hollis Marriott, 8392.  8/2/1984. 		RM 371540	Barcode: RM0231740
_________________________________________________________________________

305.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Black Hills: Elk Mountain area, Clifton Canyon above confluence with Lost Canyon, ca 13.5 air mi SSE of Newcastle.  Elev. 4500 ft.
T43N R60W S33 NW1/4 of.  43.6622 N, 104.0705 W; uncertainty 1 mi..  
Grassy openings on northwest side of canyon. Phenology: buds. 

Hollis Marriott, 8800.  8/8/1984. 		RM 371539	Barcode: RM0231745
     with Dennis Horning
_________________________________________________________________________

306.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Black Hills: Oil Creek, below confluence with Plum Creek; ca 6.5 air mi NW of Newcastle.  Elev. 4500 ft.
T45N R62W S4.  43.90778 N, 104.30639 W; uncertainty 1 mi..  
Broad creek bottom. Phenology: flowering. 

Hollis Marriott, 9020.  8/14/1984. 		RM 371537	Barcode: RM0231737
_________________________________________________________________________

307.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Black Hills: Antelope Flats near head of Cave Springs Canyon, ca 3.5 air mi NW of Newcastle.  Elev. 4900 ft.
T45N R62W S12.  43.8933 N, 104.2458 W; uncertainty 1 mi..  
Sagebrush-grassland (Artemisia tridentata). Phenology: flowering. 

Hollis Marriott, 9067.  8/14/1984. 		RM 371536	Barcode: RM0231739
_________________________________________________________________________

308.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Inyan Kara Mountain, east half.  Elev. 5400 ft.
T49N R62W S30.  44.20139 N, 104.3447 W; uncertainty 1 mi..  
Grassland on southeast-facing slope. Phenology: flowering & fruiting. 

Hollis Marriott, 9204.  8/18/1984. 		RM 371535	Barcode: RM0231879
_________________________________________________________________________

309.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Sand Creek, ca 0.5 mi S of Beulah.  Elev. 3500 ft.
T52N R60W S31.  44.5392 N, 104.0989 W; uncertainty 1 mi..  
Streambank. Phenology: flowering & fruiting. 

Hollis Marriott, 9339.  8/27/1984. 		RM 371534	Barcode: RM0231880
_________________________________________________________________________

310.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Black Hills: U. S. Highway 16 near State Line (Gillette Canyon), ca 8.5 air mi SE of Newcastle.  Elev. 4450 ft.
T44N R60W S21.  43.7777 N, 104.0697 W; uncertainty 1 mi..  
Grassland near road. Phenology: fruiting. 

Hollis Marriott, 9406.  9/3/1984. 		RM 371533	Barcode: RM0231881
_________________________________________________________________________

311.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Powder River Basin: ca 8.5 air mi NW of Oshoto.  Elev. 4200 ft.
T54N R68W S8.  44.67722 N, 105.05583 W; uncertainty 1 mi..  
Plains, sandy slopes, sandstone outcrops; plains. Phenology: flowering & fruiting. 

Keith H. Dueholm, 5557.  8/5/1978. 		RM 324247	Barcode: RM0231532
_________________________________________________________________________

312.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Belle Fourche River, 1.5 mi SE of Branaman Mountain and ca 8 mi N of Alva.  Elev. 3500 ft.
T56N R63W S20 SE1/4.  44.8232 N, 104.4432 W; uncertainty 0.5 mi..  
Sparse Artemisia frigida/Stipa comata vegetation on sandy gravel and cobbles of stream terrace. Phenology: fruiting. 

Michele Barlow, 556.  8/1/1992. 		RM 704034	Barcode: RM0231515
     with Steve Kettler
_________________________________________________________________________

313.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Weston County: Newcastle.  Elev. 4400 ft.
T45N R61W S29.  43.853 N, 104.2097 W; uncertainty 5 mi..  
Dryish hill. Phenology: flowering. 

Otto Degener, 16159.  7/16/1942. 		RM 194042	Barcode: RM0231518
     with Leroy Peiler
_________________________________________________________________________

314.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Devils Tower National Monument: Belle Fourche Campground.  Elev. 4300 ft.
T53N R65W S7.  
Red sandstone, ponderosa pine/bur oak community. Phenology: fruiting. 

Ron Kass, 4862.  8/18/1996. 		RM 743025	Barcode: RM0231543
_________________________________________________________________________

315.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Devils Tower National Monument: trail E from Joyner Ridge parking lot.  Elev. 3900-4100 ft.
T53N R65W S7.  44.59306 N, 104.71 W; uncertainty 1 mi..  
Grassy ridge, sandstone outcrops and ponderosa pine understory. Phenology: flowering. 

Ronald L. Hartman, 13695.  7/18/1981. 		RM 371523	Barcode: RM0231733
     with Hollis Marriot and Gael Fonken
_________________________________________________________________________

316.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: ca 2 air mi NE of Aladdin.  Elev. 3600 ft.
T54N R61W S22.  44.6567 N, 104.1592 W; uncertainty 1 mi..  
Prairie, sandstone outcrops, and dry drainage; sandy slopes. Phenology: flowering. 

Ronald L. Hartman, 16192.  7/15/1983. 		RM 371522	Barcode: RM0231734
_________________________________________________________________________

317.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: Beaver Creek; ca 6.5 air mi NNW of Alva.  Elev. 3800 ft.
T55N R64W S1.  44.7847 N, 104.48833 W; uncertainty 1 mi..  
Wooded creek bottoms, prairie, sandy slopes below rock outcrop, and roadside; roadside. Phenology: flowering. 

Ronald L. Hartman, 16476.  7/18/1983. 		RM 371521
_________________________________________________________________________

318.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Black Hills: headwaters of Bitter Creek; ca 2.5 air mi WNW of Alva.  Elev. 4100 ft.
T55N R64W S36.  
Grassland. Phenology: flowering. 

Hollis Marriott, 5671B.  8/22/1983. 		RM 371545
_________________________________________________________________________

319.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Grant County: Gila National Forest; Fort Bayard.  Elev. 6500 ft.
Phenology: buds. 

Alvin L. Medina, 142.  8/5/1981. 		RMRS 
_________________________________________________________________________

320.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: ca 12 air mi SE of Springfield.  Elev. 4300 ft.
T32S R45W S19.  37.2431 N, 102.534 W; GPS Reading.  
Sandsage prairie. Phenology: flowering & fruiting. 

Bernadette Kuhn, 2581.  7/11/2007. 		RM 
_________________________________________________________________________

321.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: Southeastern Colorado Research Station, 7.5 mi WSW of Springfield.  Elev. 4629 ft.
T31S R47W S6; also S7.  37.3691 N, 102.7428 W; GPS Reading.  
House site and pasture dominated by Aristida sp. and BuchloÃ« dactyloides. Phenology: flowering & fruiting. 

Bernadette Kuhn, 2802.  8/3/2007. 		RM 
_________________________________________________________________________

322.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: Carrizo Creek, Carrizo Canyon, ca 29 air mi SW of Springfield.  Elev. 4755 ft.
T33S R50W S27 South1/2; also N1/2 S34.  37.1348 N, 103.0167 W; GPS Reading.  
Near 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: flowering & fruiting. 

Bernadette Kuhn, 2917.  8/4/2007. 		RM 
     with Amy Tomson
_________________________________________________________________________

323.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: ca 15 air mi WSW of Springfield.  Elev. 4909 ft.
T32S R49W S2 SW1/4; also SE1/4 S3.  37.2801 N, 102.9051 W; GPS Reading.  
Roadside right of way near pump station. Shortgrass prairie dominated by Aristida purpurea, Sporobolus airoides and Elymus spp. Sandy soil. Phenology: flowering & fruiting. 

Bernadette Kuhn, 2991.  8/4/2007. 		RM 
     with Amy Tomson
_________________________________________________________________________

324.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland: between Bravo Canyon and Purgatoire River, ca 29.5 air mi SSW of La Junta.  Elev. 4566 ft.
T28S R55W S35 NE1/4.  37.5706 N, 103.6615 W; GPS Reading.  
Along base of sandstone outcrops, dominated by Juniperus monosperma, Bouteloua curtipendula, and Cercocarpus montanus. Phenology: flowering & fruiting. 

Bernadette Kuhn, 3205.  8/8/2007. 		RM 
     with Joe Rankin
_________________________________________________________________________

325.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Otero County: Comanche National Grassland: ca 15 air mi S of La Junta.  Elev. 4220 ft.
T26S R54W S17 SE1/4.  37.779 N, 103.478 W; GPS Reading.  
Weedy canyonside dominated by Juniperus monosperma. Phenology: flowering & fruiting. 

Bernadette Kuhn, 3596.  8/25/2007. 		RM 
     with Joe Rankin
_________________________________________________________________________

326.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland: Tobe Creek, 2.5 mi S of Tobe; ca 54.5 air mi S of La Junta.  Elev. 5416 ft.
T33S R55W S6 NE1/4.  37.1991 N, 103.6118 W; GPS Reading.  
Along creek. Phenology: flowering & fruiting. 

Bernadette Kuhn, 3624.  8/25/2007. 		RM 
     with Joe Rankin
_________________________________________________________________________

327.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Otero County: Comanche National Grassland: Colo Hwy 109 ca 5 mi S of La Junta at the entrance sign to Comanche National Grassland.  Elev. 4330 ft.
T25S R55W S2 NE1/4.  37.9097 N, 103.5331 W; GPS Reading.  
Roadside and shortgrass prairie with grama grass and annual sunflower; soils grayish and limestone derived. Phenology: flowering & fruiting. 

Brian Elliott, 11719.  9/20/2003. 		RM 
_________________________________________________________________________

328.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Otero County: Comanche National Grassland: ca 12 air mi S of La Junta at the junction of Colo Hwy 109 and David Canyon Road (County Road 802), near McMahon Arroyo.  Elev. 4400 ft.
T26S R54W S7 NE1/4.  37.8033 N, 103.4965 W; GPS Reading.  
Shortgrass prairie with grama grass and annual sunflower, with scattered juniper. Phenology: flowering & fruiting. 

Brian Elliott, 11756.  9/20/2003. 		RM 
_________________________________________________________________________

329.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Otero County: Comanche National Grassland: Vogel Canyon, ca 14-15 air mi S of La Junta, ca 3 air mi W of Higbee.  Elev. 4300 ft.
T26S R54W S19 W1/2; also T26S R55W E1/2 S24.  37.7611 N, 103.5121 W; GPS Reading.  
Riparian with tall forbs, Populus, Salix. Phenology: flowering & fruiting. 

Brian Elliott, 11851.  9/20/2003. 		RM 
_________________________________________________________________________

330.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: at junction of County Road M and County Road 13, ca 16 mi S of Pritchett.  Elev. 4750 ft.
T33S R48W S19 SE1/4; also NE1/4 S30.  37.1491 N, 102.8512 W; GPS Reading.  
Shortgrass prairie and roadside, sandy soil. Phenology: flowering & fruiting. 

Brian Elliott, 11939.  10/4/2003. 		RM 
_________________________________________________________________________

331.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: at a windmill and exclosure ca 3/4 mi N of County Road M, ca 9 mi NW of Campo, ca 10 mi N of Picture Canyon Picnic Area.  Elev. 4600 ft.
T33S R47W S20 NW1/4.  37.1594 N, 102.7392 W; GPS Reading.  
Shortgrass prairie, heavily grazed. Phenology: flowering & fruiting. 

Brian Elliott, 11961.  10/4/2003. 		RM 
_________________________________________________________________________

332.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: 3/4 mi N of Picture Canyon Picnic Area, ca 2 mi N of Oklahoma, ca 10.5 mi SW of Campo.  Elev. 4300 ft.
T35S R47W S6 NE1/4.  37.0255 N, 102.7475 W; GPS Reading.  
Sandstone bluffs, hills, cliffs, and canyons. Phenology: flowering & fruiting. 

Brian Elliott, 12003.  10/4/2003. 		RM 
_________________________________________________________________________

333.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland: along and adjacent to Tobe Creek, ca 1.2 mi S of Tobe and U.S. Hwy 160; ca 14 mi SE of Kim.  Elev. 5765 ft.
T33S R55W S5 NW1/4.  37.201 N, 103.6138 W; GPS Reading.  
Shortgrass prairie and riparian. Phenology: flowering & fruiting. 

Brian Elliott, 12067.  10/5/2003. 		RM 
_________________________________________________________________________

334.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: at junction of Colo Hwy 165 and County Road 273 or Greenhorn Road, at Colorado City.  Elev. 6000 ft.
T24S R67W S26 NW1/4.  37.933 N, 104.8527 W.  
Prairie Phenology: flowering. 

Brian Elliott, 4838.  8/4/1998. 		RM 828215
_________________________________________________________________________

335.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland and Vicinity: along County Road 34, ca 13 air mi E of Kim.  Elev. 5173 ft.
T32S R51W S23.  37.2355 N, 103.1143 W; NAD 83, , GPS Reading.  
Right of way in sandy prairie dominated by Artemisia filifolia. Phenology: flowering & fruiting. 

Bernadette Kuhn, 6457.  7/11/2008. 		RM 
_________________________________________________________________________

336.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland: ca 6 air mi E of Kim.  Elev. 5351 ft.
T32S R52W S22.  37.2376 N, 103.2415 W; NAD 83, , GPS Reading.  
At windmill, in pasture canyon dominated by Ipomoea leptophylla and Aristida purpurea, scattered Juniperus monosperma. Phenology: flowering. 

Bernadette Kuhn, 6735.  7/15/2008. 		RM 
_________________________________________________________________________

337.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland: along County Road 211, ca 7 air mi ESE of Kim.  Elev. 5356 ft.
T32S R52W S34; also S35.  37.2199 N, 103.228 W; NAD 83, , GPS Reading.  
Sandy prairie pasture, dominated by Stipa sp. and Aristida purpurea. Phenology: flowering & fruiting. 

Bernadette Kuhn, 6764.  7/15/2008. 		RM 
_________________________________________________________________________

338.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland: on County Road 30, ca 5 air mi S of Andrix; ca 9.5 air mi ESE of Kim.  Elev. 5433 ft.
T32S R51W S31; also T32S R52W S36.  37.2071 N, 103.1916 W; NAD 83, , GPS Reading.  
Prairie pasture dominated by Aristida purpurea and BuchloÃ« dactyloides with scattered Ipomoea leptophylla. Phenology: flowering. 

Bernadette Kuhn, 6778.  7/15/2008. 		RM 
_________________________________________________________________________

339.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland: ca 6 air mi SE of Kim.  Elev. 5550 ft.
T33S R52W S5.  37.2001 N, 103.2653 W; NAD 83, , GPS Reading.  
Along two track with Prunus thicket. Phenology: flowering. 

Bernadette Kuhn, 6826.  7/15/2008. 		RM 
_________________________________________________________________________

340.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: ca 5 air mi E of Utleyville; ca 20 air mi WSW of Springfield.  Elev. 4969 ft.
T32S R49W S8 N1/2.  37.2769 N, 102.9411 W; NAD 83, , GPS Reading.  
Sandsage prairie with large stands of Sporobolus and Andropogon gerardii. Phenology: flowering & fruiting. 

Bernadette Kuhn, 7045.  7/23/2008. 		RM 
_________________________________________________________________________

341.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: Middle Sand Canyon on County Road M, ca 15.5 air mi SSW of Pritchett.  Elev. 4827 ft.
T33S R49W S27 NE1/4.  37.1488 N, 102.908 W; NAD 83, , GPS Reading.  
Sandy prairie dominated by Sporobolus, Aristida, and Schedonnardus. Phenology: flowering. 

Bernadette Kuhn, 7195.  7/23/2008. 		RM 
_________________________________________________________________________

342.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Kansas, Morton County: Cimarron National Grassland: ca 2.5 air mi S of Rolla.  Elev. 3331 ft.
T34S R40W S13.  37.0907 N, 101.6267 W; NAD 83, , GPS Reading.  
In sandsage prairie, along two track leading to well. Phenology: flowering & fruiting. 

Bernadette Kuhn, 7366.  7/25/2008. 		RM 
_________________________________________________________________________

343.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Comanche National Grassland and Vicinity: Miller Canyon, ca 3 mi S of Withers Canyon Trailhead, ca 25 air mi S of La Junta.  Elev. 4398 ft.
T28S R55W S11.  37.6273 N, 103.534 W; NAD 83, , GPS Reading.  
At spring. Phenology: flowering. 

Bernadette Kuhn, 7522.  7/28/2008. 		RM 
     with Joe Rankin
_________________________________________________________________________

344.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: at radio tower and Mt. Carmel Cemetary, ca 11 air mi ESE of Campo.  Elev. 4047 ft.
T34S R44W S22.  37.0751 N, 102.3794 W; NAD 83, , GPS Reading.  
Sandy prairie dominated by Yucca glauca and Bothriochloa laguroides. Phenology: flowering & fruiting. 

Bernadette Kuhn, 7619.  7/28/2008. 		RM 
_________________________________________________________________________

345.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Baca County: Comanche National Grassland: 0.5 mi N of County Road C, along two track, ca 11 air mi SE of Campo.  Elev. 4048 ft.
T35S R44W S5.  37.0222 N, 102.4119 W; NAD 83, , GPS Reading.  
Dominated by Yucca, Artemisia filifolia, and Sporobolus. Phenology: flowering. 

Bernadette Kuhn, 7656.  7/29/2008. 		RM 
     with Joe Rankin
_________________________________________________________________________

346.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Otero County: Comanche National Grassland: ca 1/4 mile E of Colo Hwy 109, ca 11.5 air mi S of La Junta.  Elev. 4590 ft.
T25S R54W S31.  37.8256 N, 103.5058 W; NAD 83, , Nat. Geog. TOPO!.  
Pond dominated by Ambrosia and Eleocharis. Phenology: flowering. 

Bernadette Kuhn, 7918.  9/14/2008. 		RM 
     with Don Hazlett
_________________________________________________________________________

347.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: along the Canadian River at mouth of Dargol Canyon; 14 air mi W of Raton.  Elev. 7288 ft.
36 55' 40.3" N, 104 40' 56.9" W; WGS 84, uncertainty 3 m., GPS reading.  
Rocky riverbanks and adjacent dry gravel bars, with scattered small Pinus ponderosa saplings, Senecio, Verbascum thapsus, Ratibida columnifera, grasses. Flowers pale yellow; common in sandy soil. Phenology: flowering. 

Ben Legler, 5855.  7/12/2007. 		RM 840262	Barcode: RM0018191
_________________________________________________________________________

348.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Las Animas County: Vermejo Park Ranch: in Long Canyon 0.65 air mi N of mouth of Joe Baker Canyon; 1.1 air mi N of New Mexico and 15 air mi SW of Raton.  Elev. 6950 ft.
37 0' 36.9" N, 104 41' 56.6" W; WGS 84, uncertainty 6 m., GPS reading.  
Rocky bar adjacent to flowing stream, with Verbascum thapsus, Ambrosia, Ratibida columnifera, grasses. Flowers yellow, heads nodding; frequent in sandy soil among rocks on stream bar. Phenology: flowering. 

Ben Legler, 7023.  8/3/2007. 		RM 840261	Barcode: RM0018190
_________________________________________________________________________

349.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Colfax County: Vermejo 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.  Elev. 6651 ft.
36 34' 47.9" N, 104 57' 23" W; WGS 84, uncertainty 4 m., GPS reading.  
Sandy creek bottoms dominated by dense growth of Symphoricarpos occidentalis, Conyza canadensis, and Bromus, with scattered Alnus incana and Juniperus scopulorum. Occasional. Phenology: flowering & fruiting. 

Ben Legler, 7814B.  8/16/2007. 		RM 840260	Barcode: RM0018189
_________________________________________________________________________

350.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Fremont County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: ca 4 mi N of Wetmore on Colo Hwy 67.  Elev. 5650 ft.
T20S R69W S22 E1/4.  38.2966 N, 105.0957 W.  
Roadside and prairie. Phenology: flowering & fruiting. 

Brian Elliott, 5647.  8/19/1998. 		RM 828359
_________________________________________________________________________

351.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., New Mexico, Mora County: Coyote Creek State Park: 16 air mi S of Angel Fire.  Elev. 2478 m.
36 10' 22" N, 105 13' 57" W; GPS reading.  
Mountain meadow sourrounding stream. Phenology: flowering & fruiting. 

Michael Schiebout, 8807.  8/10/2005. 		RM 824246	Barcode: RM0128369
_________________________________________________________________________

352.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Harding County: Custer National Forest: North Cave Hills: Browns Pond and vicinity on Campbell Creek, ca 6.5 air mi WSW of Ludlow; ca 15 air mi N of Buffalo.  Elev. 2900-2940 ft.
T21N R5E S10 SW1/4.  45.7949 N, 103.4983 W; NAD 83, , GPS reading.  
Reservoir shore and adjacent banks. Phenology: flowering. 

B. E. Nelson, 78443.  7/30/2009. 		USFS 885294	Barcode: USFS0052884
_________________________________________________________________________

353.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., South Dakota, Harding County: Unnamed tributary of South Fork Moreau River, ca 0.5 air mi SW of County Road 897 and ca 3 air mi S of junction of 897 and Dillon Road, ca 21 air mi SSE of Camp Crook.  Elev. 3110-3160 ft.
T15N R3E S18 SW1/4.  45.2632 N, 103.808 W; WGS 83, , GPS reading.  
Grazing land dominated by grasses. Phenology: fruiting. 

Hans Hallman, 2232.  7/16/2009. 		RM 
_________________________________________________________________________

354.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Ca 0.5 air mi E of Mont Hwy 484 or Otter Creek Road, ca 6.5 air mi N of Fort Howes and ca 15 air mi SSE of Ashland.  Elev. 3240-3290 ft.
T5S R45E S22 NE1/4.  45.3935 N, 106.162 W; NAD 83, , GPS reading.  
Grass-dominated grazing land. Phenology: flowering. 

Hans Hallman, 2695.  7/22/2009. 		RM 
_________________________________________________________________________

355.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Carter County: Custer National Forest: Long Pines: in Cheesman Draw, just NE of Pioneer Cemetery off of Forest Road 3045, ca 8.5 air mi WNW of Camp Cook, SD.  Elev. 3630-3670 ft.
T3S R61E S12 South1/2.  45.5862 N, 104.144 W; NAD 83, , GPS reading.  
In and near margin of reservoir. Phenology: flowering. 

Hans Hallman, 4027.  8/11/2009. 		USFS 883255	Barcode: USFS0049241
_________________________________________________________________________

356.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: just N of Fifteenmile Creek or Forest Road 4094, ca 1 air mi NNE of Dalzells Spring, ca 21 air mi ESE of Ashland.  Elev. 3840-3960 ft.
T5S R47E S9 SE1/4; also SW1/4 S10, NW1/4 S15, and NE1/4 S16.  45.4033 N, 105.9277 W; NAD 83, , GPS reading.  
Green ash-dominated meadow with scattered ponderosa pine. Phenology: flowering. 

Hans Hallman, 4121.  8/13/2009. 		 	Barcode: USFS0050092
_________________________________________________________________________

357.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Carter County: Custer 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.  Elev. 3420-3520 ft.
T1N R59E S19 NE1/4.  45.8362 N, 104.4314 W; NAD 83, , GPS reading.  
In and around pond dominated by Scirpus and Typha spp. and grasses on its margin. Phenology: flowering. 

Hans Hallman, 4492.  8/18/2009. 		USFS 885314	Barcode: USFS0052904
     with G. Gust
_________________________________________________________________________

358.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: in and E of Stagville Draw on Forest Road 3813 at Stagville Spring, SE past Forest Road 3813B to east boundary of Forest, ca 5.5 air mi SSE of Ekalaka.  Elev. 3790-3900 ft.
T1N R58E S27 NW1/4; also NE1/4 S28 and SW1/4 S21.  45.8179 N, 104.5024 W; NAD 83, , GPS reading.  
Green ash and Prunus spp.-dominated draw. Phenology: flowering. 

Hans Hallman, 4538.  8/18/2009. 		USFS 885313	Barcode: USFS0052903
     with G. Gust
_________________________________________________________________________

359.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: in the vicinity of Gundlach Well off of Forest Road 3103, ca 6 air mi ESE of Ekalaka.  Elev. 3740-3800 ft.
T1N R59E S7 South1/2; also N1/2 S7.  45.866 N, 104.4346 W; NAD 83, , GPS reading.  
Symphoricarpos and grass-dominated grazed meadow. Phenology: flowering. 

Hans Hallman, 4669.  8/18/2009. 		USFS 885312	Barcode: USFS0052902
     with G. Gust
_________________________________________________________________________

360.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., North Dakota, Cass County: Fargo.
Prairie. Phenology: buds. 

O. A. Stevens, s.n..  8/31/1935. 		RM 154303
_________________________________________________________________________

361.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., North Dakota, Benson County: Leeds.
Waste places. Phenology: flowering. 

J. Lunell, s.n..  8/21/1902. 		RM 39140
_________________________________________________________________________

362.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., North Dakota, Ramsey County: Devils Lake.
Date is hand written as "8/20". Phenology: flowering. 

no collector, 220.  8/20/. 		RM 74268
_________________________________________________________________________

363.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., North Dakota: Walhalla.
Phenology: flowering. 

L. R. Waldron, 1543.  8/7/1902. 		RM 44753
_________________________________________________________________________

364.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., North Dakota, Towner County: Maza.
Prairie. Phenology: flowering. 

J. Kildahl, 57.  8/3/1900. 		RM 35506
_________________________________________________________________________

365.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Nebraska, Grant County: Lake region: 3 mi NE of Whitman.
Phenology: flowering. 

N. P. Tulen, s.n..  8/1/1893. 		RM 226823
_________________________________________________________________________

366.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Nebraska, Sheridan County: Metcalf Public Hunting Grounds: 13 mi N of Hay Springs.  Elev. 3300 ft.
Disturbed bottom area among open ridges and Pinus ponderosas forest. Phenology: flowering. 

Elray S. Nixon, 228.  8/15/1964. 		RM 275451
_________________________________________________________________________

367.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Nebraska, Thomas County: 7 mi SW of Halsey.
T22N R26W S19 SE1/4.  
Sandy soil; 5% slope, east exposure; sandhill grassland with Calo, Anha, Amps, Stipa, Pipo. Phenology: flowering. 

Keith Evans, 27.  7/24/1964. 		USFS 469663
_________________________________________________________________________

368.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana: Custer National Forest: Taylor Creek: Stewarts Ranch.  Elev. 2600 ft.
West slope; deep clay loam and fine gravel. Widely distributed and dominant. Phenology: flowering. 

J. A. Cramer, 19.  9/26/1925. 		RM 469675
_________________________________________________________________________

369.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Big Horn County: Slopes above Fort Smith near substation.  Elev. 3500 ft.
T6S R31E S17.  
Tall grass prairie. Phenology: flowering. 

Robert W. Lichvar, 6928.  8/9/1983. 		RM 355421
_________________________________________________________________________

370.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana: Custer National Forest: Poker Jim Ranger Station.  Elev. 3000 ft.
Slope 5%, west exposure; sandy loam soil; with pepper-grass, sedge and bedstraw. Rare; moderate distribution. Phenology: vegetative only. 

Glenn Flathers, 38.  8/3/1922. 		USFS 469667
_________________________________________________________________________

371.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana: Custer National Forest: head of King Creek, district 3.  Elev. 3000 ft.
West slope; gravelly loam soil; grass cover type. Everywhere, abundant. Phenology: flowering. 

Glenn Flathers, 18.  9/21/1922. 		USFS 469668
_________________________________________________________________________

372.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana: Billings.
Phenology: flowering. 

J. W. Blankinship, s.n..  9/25/1903. 		RM 121971
_________________________________________________________________________

373.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Forest Road 4516, ca 2 air mi W of Mont Hwy 484 or Otter Creek Road, ca 6.5 air mi NNW of Fort Howes.  Elev. 3300-3420 ft.
T5S R45E S20 E1/4; also S21 W1/2.  45.3875 N, 106.1952 W; NAD 83, , GPS reading.  
Grass and sagebrush-dominated grazing land. Phenology: flowering. 

Hans Hallman, 6035.  7/10/2010. 		USFS 885311	Barcode: USFS0052901
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374.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Griffin Pass, E of Forest Road 4431, ca 21.5 air mi ENE of Ashland.  Elev. 3740-3800 ft.
T2S R48E S20 NW1/4; also S17 SW1/4.  45.6526 N, 105.8345 W; NAD 83, , GPS reading.  
Ponderosa pine woodland with grass-dominated understory. Phenology: flowering. 

Hans Hallman, 6115.  7/12/2010. 		USFS 885310	Barcode: USFS0052900
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375.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of East Fork Spring, just S of East Fork Otter Creek Road, ca 14 air mi ENE of Ashland.  Elev. 3760-3780 ft.
T2S R46E S25.  45.6345 N, 105.9923 W; NAD 83, , GPS reading.  
Grass-dominated meadow adjacent to Prunus, Crataegus, and green ash-dominated draw. Phenology: flowering. 

Hans Hallman, 6140.  7/13/2010. 		USFS 885309	Barcode: USFS0052899
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376.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Suicide Pass near Forest Road 4777, ca 1 air mi N of U.S. Hwy 212, ca 18.5 air mi E of Ashland.  Elev. 4040-4080 ft.
T3S R47E S23 N1/4; also S14 S1/4.  45.5634 N, 105.8942 W; NAD 83, , GPS reading.  
Meadow dominated by grasses, snowberry, sagebrush, and Perideridia. Phenology: flowering. 

Hans Hallman, 6365.  7/18/2010. 		USFS 885308	Barcode: USFS0052898
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377.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: In the vicinity of unnamed reservoir on Flood Creek, ca 0.5 air mi E of Moorehead Road, ca 15 air mi SW of Broadus.  Elev. 3240-3360 ft.
T6S R50E S19 SE1/4; also S20 SW1/4.  45.2941 N, 105.6344 W; NAD 83, , GPS reading.  
Grass and sagebrush-dominated grazing land with scattered badlands and gravelly slopes. Phenology: flowering. 

Hans Hallman, 6431.  7/19/2010. 		RM 
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378.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer 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.  Elev. 3650-3800 ft.
T3S R47E S17 NW1/4.  45.5758 N, 105.9554 W; NAD 83, , GPS reading.  
Ponderosa pine woodland with grass-dominated understory. Phenology: flowering & fruiting. 

Hans Hallman, 6517.  7/21/2010. 		USFS 885307	Barcode: USFS0052897
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379.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer 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.  Elev. 3440-3600 ft.
T6S R45E S26 NE1/4.  45.292 N, 106.1827 W; NAD 83, , GPS reading.  
Burned hillside with rocky, sandy soils and scattered rock outcrops. Phenology: flowering. 

Hans Hallman, 6850.  7/27/2010. 		USFS 885306	Barcode: USFS0052896
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380.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Dry Gulch Reservoir E of Forest Road 4432D, ca 3.5 air mi E of Fort Howes.  Elev. 3840-4020 ft.
T6S R46E S22 SE1/4.  45.3013 N, 106.0786 W; NAD 83, , GPS reading.  
Grass and sagebrush-dominated steppe. Phenology: flowering. 

Hans Hallman, 6903.  7/28/2010. 		USFS 885305	Barcode: USFS0052895
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381.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: in the vicinity of O'Dell Reservoir, ca 1 air mi ENE of Poker Jim Butte, ca 19 air mi SSW of Ashland.  Elev. 4000-4120 ft.
T6S R44E S9 SE1/4.  45.329 N, 106.3488 W; NAD 83, , GPS reading.  
Mixed sagebrush and grass-dominated steppe and hardwood draw with scattered ponderosa pine; heavily grazed and trodden on by cattle. Phenology: flowering. 

Hans Hallman, 7004.  7/28/2010. 		USFS 885304	Barcode: USFS0052894
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382.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in Bridge Canyon, ca 1 air mi E of Taylor Butte, ca 2 air mi ESE of Fort Howes.
T6S R46E S28 W1/4; also S29 E1/4.  45.2869 N, 106.1179 W; NAD 83, , GPS reading.  
East-facing slope in hardwood draw with Prunus and grass-dominated understory. Phenology: fruiting. 

Hans Hallman, 7043.  7/30/2010. 		USFS 885303	Barcode: USFS0052893
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383.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in Bridge Canyon, ca 1 air mi E of Taylor Butte, ca 2 air mi ESE of Fort Howes.
T6S R46E S28 W1/4; also S29 E1/4.  45.2869 N, 106.1179 W; NAD 83, , GPS reading.  
East-facing slope in hardwood draw with Prunus and grass-dominated understory. Phenology: flowering. 

Hans Hallman, 7063.  7/30/2010. 		USFS 885302	Barcode: USFS0052892
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384.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of South Fork Bloom Creek, just N of Bloom Creek Road, ca 3 air mi ESE of Diamond Butte, ca 14.5 air mi ESE of Fort Howes.  Elev. 3620-3680 ft.
T7S R48E S8 SW1/4.  45.2359 N, 105.8759 W; NAD 83, , GPS reading.  
Lowland dominated by cottonwood, green ash, Rosa, Ribes, and Symphoricarpos. Phenology: fruiting. 

Hans Hallman, 7130.  7/31/2010. 		USFS 885301	Barcode: USFS0052891
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385.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Forest Road 47842, ca 1/4 road mi from its junction with Forest Road 4784, ca 1.5 air mi S of Fifteen Mile Creek Road, ca 22 air mi SE of Ashland.  Elev. 3690-3850 ft.
T5S R47E S29 E1/2.  45.3676 N, 105.9549 W; NAD 83, , GPS reading.  
Grass and sagebrush-dominated steppe with scattered islands of open ponderosa pine woodland. Phenology: flowering. 

Hans Hallman, 7196.  8/3/2010. 		USFS 885300	Barcode: USFS0052890
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386.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: SW of the junction of Forest roads 4769 and 4427, ca 3 air mi S of Liscom Butte, ca 16 air mi ENE of Ashland.  Elev. 3640-3960 ft.
T1S R47E S31 S1/2.  45.7002 N, 105.9802 W; NAD 83, , GPS reading.  
Ponderosa pine woodland with grass-dominated understory and moist draws dominated by green ash and hawthorn. Phenology: flowering. 

Hans Hallman, 7277.  8/5/2010. 		USFS 885299	Barcode: USFS0052889
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387.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: along Forest Road 47696 between Sartin Draw Reservoir and Sartin Draw Spring, ca 16 air mi NE of Ashland.  Elev. 3440-3560 ft.
T1S R46E S25 N1/2.  45.7213 N, 105.9928 W; NAD 83, , GPS reading.  
In green ash and Crataegus-dominated draw surrounded by open ponderosa pine woodland with grass-dominated understory. Phenology: flowering. 

Hans Hallman, 7324.  8/6/2010. 		USFS 883260	Barcode: USFS0049246
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388.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Mud Turtle Reservoir, N of Forest Road 4432, ca 3 air mi NW of Diamond Butte, ca 25.5 air mi SE of Ashland.  Elev. 3920-4000 ft.
T6S R47E S28 S1/2.  45.2849 N, 105.9668 W; NAD 83, , GPS reading.  
Steppe dominated by Artemisia, Psoralidium, and grasses. Phenology: flowering. 

Hans Hallman, 7371.  8/10/2010. 		USFS 885298	Barcode: USFS0052888
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389.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: Tongue River Breaks Hiking and Riding Area: along North Fork Poker Jim Creek, ca 3.5 air mi N of Poker Jim Butte, ca 15.5 air mi SSW of Ashland.  Elev. 3680-3920 ft.
T5S R43E S25.  45.3793 N, 106.3708 W; NAD 83, , GPS reading.  
Draw dominated by green ash, Prunus, and Symphoricarpos. Phenology: flowering. 

Hans Hallman, 7469.  8/11/2010. 		USFS 885297	Barcode: USFS0052887
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390.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: Tongue River Breaks Hiking and Riding Area: in the vicinity of Black Eagle Spring N of Forest Road 4023, ca 3.5 air mi WNW of Poker Jim Butte, ca 19 air mi SSW of Ashland.  Elev. 3880-3960 ft.
T6S R43E S2.  45.3417 N, 106.4304 W; NAD 83, , GPS reading.  
Hardwood draw dominated by Crataegus and Prunus. Phenology: flowering. 

Hans Hallman, 7544.  8/15/2010. 		USFS 885296	Barcode: USFS0052886
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391.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: just SE of Cottonwood Spring in vicinity of unnamed reservoir off of Forest Road 4801, ca 2.5 air mi WSW of Poker Jim Butte, ca 21 air mi SSW of Ashland.  Elev. 3620-3650 ft.
T6S R43E S13 SW1/4.  45.3015 N, 106.4169 W; NAD 83, , GPS reading.  
Rocky and sandy slope above reservoir with green ash, ponderosa pine, Juniperus, and grasses. Phenology: flowering. 

Hans Hallman, 7606.  8/15/2010. 		USFS 885295	Barcode: USFS0052885
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392.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Carter County: Custer National Forest: Long Pines: in Cheesman Draw, just NE of Pioneer Cemetery off of Forest Road 3045, ca 8.5 air mi WNW of Camp Cook, SD.  Elev. 3630-3670 ft.
T3S R61E S12 South1/2.  45.5862 N, 104.144 W; NAD 83, , GPS reading.  
In and near margin of reservoir. Phenology: flowering. 

Hans Hallman, 4027.  8/11/2009. 		 	Barcode: USFS0050557
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393.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: just N of Fifteenmile Creek or Forest Road 4094, ca 1 air mi NNE of Dalzells Spring, ca 21 air mi ESE of Ashland.  Elev. 3840-3960 ft.
T5S R47E S9 SE1/4; also SW1/4 S10, NW1/4 S15, and NE1/4 S16.  45.4033 N, 105.9277 W; NAD 83, , GPS reading.  
Green ash-dominated meadow with scattered ponderosa pine. Phenology: flowering. 

Hans Hallman, 4121.  8/13/2009. 		USFS 885315	Barcode: USFS0052905
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394.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Delta County: Gunnison Gorge National Conservation Area: Gunnison River, ca 1 mi SW of the confluence of the North Fork and Gunnison rivers, ca 7 air mi WSW of Hotchkiss.  Elev. 5092 ft.
T15S R94W S1 NW1/4.  38.7781 N, 107.8528 W; NAD 83, , GPS reading.  
Sandy, disturbed area along river. Phenology: flowering & fruiting. 

Lori E. Brummer, 11678.  9/10/2012. 		RM 
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395.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Mesa County: Uncompahgre Plateau: Dominguez Canyon, just above the mouth of the canyon, ca 18 air mi NW of Delta.  Elev. 4760 ft.
T14S R98W S17 SW1/4.  38.8289 N, 108.3794 W; NAD 83, , GPS reading.  
Salt desert shrub on sandy soils. Phenology: flowering & fruiting. 

Lori E. Brummer, 12014.  9/17/2012. 		RM 
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396.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Goshen County: North Platte River at Nebraska, south bank.  Elev. 4100 ft.
41 59.3' N, 104 3.2' W; unknown, , Specimen Label.  
River bank, with Oenothera villosa and Potentilla paradoxa. Phenology: buds. 

Robert D. Dorn, 10848.  8/14/2013. 		RM 914518	Barcode: RM0231496
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397.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Delta County: Escalante Canyon Road and Dominguez Rim, ca 12 air mi WNW of Delta.  Elev. 4800-5400 ft.
T4S R3E S33 South1/2; also SW1/4 S27 and SW1/4 S29.  38.7777 N, 108.2505 W to 38.7619 N, 108.2547 W; GPS reading.  
Desert shrub community. Phenology: flowering. 

Lori E. Brummer, 2255.  8/19/2010. 		RM 
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398.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Delta County: North Fork Valley: Chipeta Unit of Hotchkiss National Fish Hatchery, NE of the main hatchery, ca 0.5 road mi SE of J Road, ca 2 air mi SW of Hotchkiss.  Elev. 5280 ft.
T15S R8W S2 NE1/4.  38.78219 N, 107.74667 W; NAD 83, , Nat. Geog. TOPO!.  
Along road in riparian area in desert shrub community. Phenology: flowering & fruiting. 

Lori E. Brummer, 1999-16.  8/27/1999. 		RM 
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399.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Ca 20 mi NW of Wheatland.  Elev. 5500 ft.
42 16.8' N, 105 13.9' W; unknown, , GPS reading.  
Grassland, with Eriogonum alatum and Dalea candida. Phenology: flowering. 

Robert D. Dorn, 11458.  7/28/2014. 		RM 921426	Barcode: RM0079931
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400.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Rock Lake, ca 6 mi SW of Wheatland.  Elev. 5000 ft.
41 59.3' N, 105 1.6' W; unknown, , GPS reading.  
Grassland, with Liatris and Plantago. Phenology: flowering. 

Robert D. Dorn, 11532.  8/11/2014. 		RM 921602	Barcode: RM0079600
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401.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Crook County: Ca 3.5 mi E of Alva.  Elev. 4800 ft.
44 41.6' N, 104 22.3' W; unknown, , GPS reading.  
Open ponderosa pine, with Grindelia and Solidago. Phenology: fruiting. 

Robert D. Dorn, 11627.  9/24/2014. 		RM 921700	Barcode: RM0079561
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402.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Camp Guernsey: Osburn Ranch parcel; east end of transect ca 4.0 km due E of North Platte River, ca 8.4 km NW of Range Control.  Elev. 1433 m.
510862E, 4693414N to 510800E, 4693443N; unknown, GPS reading.  
Level to rolling to sloped; mixed grass prairie with scattered silver sagebrush; silty loam with rocks; with Artemisia cana, Hesperostipa comata, Bromus japonicus, Opuntia polyacantha, Liatris spicata, Bouteloua curtipendula, Artemisia frigida, Achnatherum hymenoides, Juniperus scopulorum, Carex filifolia. Local; erect, rhizomatous, perennial herb; 1.5 dm tall. Phenology: vegetative only. 

Nancy E. Hastings, 437.  8/28/2007. 		RM 958049	Barcode: RM0210931
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403.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Camp Guernsey: Gray Rocks Ranch parcel, Box Springs; ca 3.5 km SW of Warm Springs, ca 4.4 km SE of U.S. Hwy 26.  Elev. 1445 m.
515547E, 4674359N to 515744E, 4674208N; unknown, GPS reading.  
Level to moderately sloping on sides; disturbed riparian; silty loam with mud;  with Juniperus scopulorum, Salix amygdaloides, Glycyrhiza lepidota, Rosa woodsii, Prunus virginiana, Melilotus officinalis, Phleum pratense, Nassella viridula, Ribes sp. Scattered; erect, rhizomatous, perennial herb; to 3dm tall. Phenology: flowering. 

Nancy E. Hastings, 19.  8/17/2006. 		RM 958050	Barcode: RM0210932
     with P. Block
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404.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Camp Guernsey: Deercorn Spring Creek, ca 0.7 km W of Broom Creek.  Elev. 1500 m.
zone DMC, 518500E, 4695750N to 518050E, 4696000N; unknown, GPS reading.  
Gentle slope; riparian; rocky sandy loam; with Eleocharis palustris, Poa pratensis, Melilotus officinalis, Scirpus, Juncus spp. Infrequent; erect herb; 5 dm tall; deep rooted. Phenology: flowering & fruiting. 

Carlos A. Popolizio, 1077.  8/28/1996. 		RM 957577	Barcode: RM0214220
     with Donald L. Hazlett
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405.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Wyoming, Platte County: Camp Guernsey: 2.5 km NE of Old 4J Ranch, ca 0.7 km E of Wyo Hwy 270.  Elev. 1584 m.
zone DMC, 525500E, 4703500N; unknown, GPS reading.  
Rolling; grassland with silstone and limestone outcrops; silty sand with large cobbles; with Andropogon, Artemisia, Bromus, Heterotheca spp. Locally common; erect, rhizomatous, perennial herb; to 45 cm tall. Phenology: flowering & fruiting. 

Patricia P. Douglas, 508.  8/22/1995. 		RM 957639	Barcode: RM0214231
     with B. E. Nelson
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406.  Ambrosia psilostachya DC. 				Asteraceae

U.S.A., Colorado, Jefferson County: East-central Colorado: Mosquito Range to Plains: Platte Canyon: along the South Platte River and adjacent canyons and ridges ca 4.7 air mi NE of town of South Platte.  Elev. 5600-6900 ft.
T7S R69W S5 E1/2; also NW1/4 S9; also T6S R69W S33 and S34.  39.4683 N, 105.1385 W; uncertainty 1 mi..  zone 13.  
Steep, rocky slopes above the river with sandy soils in mountain mahogany and Gambel's oak. Phenology: flowering. 

Timothy W. Chumley, 4734.  7/17/1996. 		 
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