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

Database Search Results

335 matching records found (of 335).
Search query: Genus begins with Toxicodendron, Species begins with rydbergii, (search polygon not defined)
Sorted by: Scientific Name

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1.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: along West Fork Duck Creek, ca 7.5 air mi NE of Soda Well, ca 28 air mi NE of Gillette.  Elev. 3940-4000 ft.
T55N R69W S30 W1/2.  44.7173 N, 105.1975 W; uncertainty 1 mi..  
Draws leading to the creek with chokecherry and hawthorn. Phenology: vegetative only. 

B. E. Nelson, 57249.  6/18/2002. 		RM 
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2.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Niobrara County: Thunder Basin National Grassland and Vicinity: Old Woman Creek Hills, ca 2.5 air mi E of U.S. Hwy 85, ca 52 air mi S of Newcastle; ca 25 air mi NNE of Lusk.  Elev. 4250-4520 ft.
T36N R62W S16.  43.0966 N, 104.3171 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
Steep ravine. Phenology: vegetative only. 

Peter J. Ebertowski, 1110.  7/3/2002. 		RM 
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3.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: hills N of Weston Peak on Forest Road 1246, ca 25 air mi NNE of Gillette; ca 33 air mi NW of Moorcroft.  Elev. 3930-4420 ft.
T54N R71W S26 W1/2.  44.6292 N, 105.3595 W; uncertainty 1 mi..  
Near seep in shady ravine with Rocky Mountain juniper. Phenology: fruiting. 

Peter J. Ebertowski, 2523.  8/2/2002. 		RM 
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4.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: Wild Horse Creek on York or Forest Road 900, ca 27 air mi NNE of Gillette; ca 24 air mi N of Rozet.  Elev. 3960-4050 ft.
T54N R70W S25 SE1/4.  44.6292 N, 105.2178 W; uncertainty 0.5 mi..  
Creek bank and floodplain. Phenology: fruiting. 

Peter J. Ebertowski, 2562.  8/2/2002. 		RM 
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5.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: along West Plum Creek on Plum Creek or County Road 30, ca 6.5 air mi NW of Newcastle, ca 7 air mi ESE of Osage.  Elev. 4460 ft.
T46N R62W S27 SE1/4.  43.9359 N, 104.289 W; uncertainty 0.5 mi..  
Mosaic of sagebrush/grassland and ponderosa pine. Phenology: vegetative only. 

Peter J. Ebertowski, 3684.  9/1/2002. 		RM 
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6.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: above and S of reservoir in gully leading to Robbers Roost Creek, on Cheyenne River or County Road 54, ca 24 air mi SSW of Newcastle; ca 44 air mi SSE of Upton.  Elev. 3980-4060 ft.
T41N R62W S21 NE1/4.  43.516 N, 104.3119 W; uncertainty 0.5 mi..  
Grassland. Phenology: vegetative only. 

Peter J. Ebertowski, 769.  6/28/2002. 		RM 
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7.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: badlands ca 1 mi NW of Soda Well, on Forest Road 1247B, ca 31 air mi NNE of Gillette; ca 34 air mi NNW of Moorcroft.  Elev. 3860-4100 ft.
T55N R70W S33 W1/2.  44.7026 N, 105.2785 W.  
Sagebrush grassland, with ravines containing ponderosa pine and Rocky Mountain juniper. Phenology: vegetative only. 

Peter J. Ebertowski, 4077a.  5/30/2003. 		RM 
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8.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: Piney Canyon on Piney Canyon or County Road 69, ca 22 air mi ESE of Wright; ca 48 air mi WSW of Newcastle.  Elev. 4840-5060 ft.
T42N R69W S26.  43.5868 N, 105.1098 W.  
Slopes around spring with ponderosa pine. Phenology: buds. 

Peter J. Ebertowski, 4978.  6/16/2003. 		RM 
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9.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: hills N of confluence of North Fork Duck Creek and Duck Creek, off dirt road to Dickinson Ranch, ca 39 air mi NNE of Gillette; ca 39 air mi NNW of Moorcroft.  Elev. 3800-3940 ft.
T56N R69W S30 W1/2.  44.8086 N, 105.1883 W.  
Ravine slope with Rocky Mountain juniper and low shrubs. Phenology: vegetative only. 

Peter J. Ebertowski, 5926.  7/3/2003. 		RM 
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10.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: tributary of Skull Creek, E of Sunquist Draw, on County Road 14, ca 13 air mi ESE of Upton; ca 15 air mi NE of Newcastle.  Elev. 4580-4640 ft.
T47N R63W S14 W1/4.  44.0481 N, 104.3896 W.  
Grassland on rocky hillside. Phenology: vegetative only. 

Peter J. Ebertowski, 6223.  7/7/2003. 		RM 
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11.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Niobrara County: Thunder Basin National Grassland and Vicinity: Sage Creek on Old Highway 85 or County Road 9, ca 4.5 air mi E of Mule Creek Junction; ca 32 air mi S of Newcastle.  Elev. 3880-3960 ft.
T39N R61W S13 NE1/4.  43.3608 N, 104.1309 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Grassy ravine with silver sagebrush. Phenology: vegetative only. 

Peter J. Ebertowski, 6395.  7/9/2003. 		RM 
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12.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: tributary of Dry Fork Spring Creek, on York or Forest Road 900, ca 30 air mi NE of Gillette; ca 31 air mi NW of Moorcroft.  Elev. 3920-4100 ft.
T54N R70W S12.  44.6733 N, 105.2178 W.  
Narrow ravine lined by ponderosa pine. Phenology: fruiting. 

Peter J. Ebertowski, 7187.  7/27/2003. 		RM 
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13.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: West Fork Duck Creek, on two-track off Forest Road 903, ca 34 air mi NNE of Gillette; ca 34 air mi NNW of Moorcroft.  Elev. 3980-4150 ft.
T55N R69W S19 SE1/4.  44.732 N, 105.1975 W.  
Ravine with occasional boxelder and ash on slopes. Phenology: vegetative only. 

Peter J. Ebertowski, 7566.  8/2/2003. 		RM 
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14.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: ridge E of Lone Tree Creek, on Raven Creek or County Road 18, ca 34 air mi W of Newcastle; ca 25 air mi S of Moorcroft.  Elev. 4620-4760 ft.
T45N R67W S4 E1/2.  43.9078 N, 104.9124 W.  
Steep ravine slope, bare soil  in sagebrush grassland. Phenology: vegetative only. 

Peter J. Ebertowski, 8333.  8/19/2003. 		RM 
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15.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Arizona, Coconino County: Coconino National Forest: SE of switch back on County Road 128 at base and lower slope of Anderson Mesa, ca 10 air mi SE of Flagstaff.  Elev. 6880-7100 ft.
T20N R8E S27 E1/2; also W1/4 S26.  35.0879 N, 111.5294 W; GPS Reading.  
Rocky draw through ponderosa pine forest. Phenology: vegetative only. 

B. E. Nelson, 63456.  9/24/2004. 		RM 
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16.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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: vegetative only. 

B. E. Nelson, 63613.  9/25/2004. 		RM 
     with James F. Fowler
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17.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Arizona, Coconino County: Coconino National Forest: above and in upper Walnut Canyon from County Road 3 (Forest Hwy 3) to the junction with Skunk Canyon, ca 4.5 - 5 air mi SE of Flagstaff.  Elev. 6720-6800 ft.
T20N R7E S1 SE1/4.  35.1316 N, 111.6052 W to 35.15 N, 111.6 W; GPS Reading.  
Slopes of small side canyon. Phenology: vegetative only. 

B. E. Nelson, 63752.  9/26/2004. 		RM 
     with James F. Fowler
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18.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Arizona, Coconino County: Coconino National Forest: Sterling Canyon, last mile of Manzanita Trail to Manzanita Campground and down road to Encinoso Picnic Area.  Elev. 4728-4849 ft.
T18N R6E S17; also S18.  34.9366 N, 111.747 W to 34.9258 N, 111.7349 W; GPS Reading.  
Ponderosa pine slopes. Phenology: fruiting. 

Ronald L. Hartman, 80370.  8/28/2004. 		RM 
     with James F. Fowler
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19.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: north side of North Fork Shoshone River, ca 1 mi W of the mouth of Canyon Creek.  Elev. 5800 ft.
T52N R105W S19.  44.4618 N, 109.5435 W.  
Around spring runs with Elymus, Rosa, and Apocynum. 

Erwin F. Evert, 10231.  6/22/1986. 		RM 725152	Barcode: RM0040417
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20.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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 ponderosa pine forest on limestone slope. Phenology: vegetative only. 

B. E. Nelson, 66521.  9/13/2005. 		RM 
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21.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Arizona, Apache County: Apache National Forest: along West Fork Black River just below Forest Road 25, ca 0.8 air mi NW of the confluence with East Fork Black River, ca 1 1/4 air mi W of Buffalo Crossing, ca 26.5 air mi S of Springerville.  Elev. 7520-7600 ft.
T4N R28E S11 NW1/4.  33.7589 N, 109.3746 W; GPS Reading.  
Open ponderosa pine forest on bluff along the stream. Phenology: vegetative only. 

B. E. Nelson, 67388.  9/22/2005. 		RM 
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22.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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.  
Stream bank and adjacent thickets. Phenology: vegetative only. 

B. E. Nelson, 69898.  8/25/2006. 		RM 
     with James F. Fowler, Brian Reif
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23.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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.  
Gambels oak/Rocky Mountain juniper slope with scattered ponderosa pine. Phenology: vegetative only. 

B. E. Nelson, 62683.  8/15/2004. 		RM 
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24.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Archuleta County: Eastern San Juan Mountains: U.S. Hwy 160, old road just N of highway before ascending Yellow Jacket Pass, Squaw Creek on south side of highway.  Elev. 7246 ft.
T34N R5W S9 NW1/4 of NE1/4.  37.2346 N, 107.4215 W; GPS Reading.  
Roadside pullout on an old road. Phenology: flowering. 

Jeanette Flaig, 7393.  8/8/2004. 		RM 
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25.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Utah, Kane County: Glen Canyon National Recreation Area: Lower Cow Hanging Garden, Cow Canyon.  Elev. 1175 m.
x505060:y4139649.  zone 12, 505060E, 4139649N; Specimen Label.  
Hanging garden. 

James F. Fowler, 1003.  9/5/1992. 		 
     with Jon Hak and C. Keleher
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26.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Utah, Kane County: Glen Canyon National Recreation Area: Fence Hanging Garden, Fence Canyon.  Elev. 1213 m.
x506611:y4139277.  zone 12, 506611E, 4139277N; Specimen Label.  
Hanging garden. 

James F. Fowler, 1027.  9/6/1992. 		 
     with Jon Hak and C. Keleher
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27.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Utah, Kane County: Glen Canyon National Recreation Area: Stone Basin Hanging Garden, Cow Canyon.  Elev. 1200 m.
x505926:y4141012.  zone 12, 505926E, 4141012N; Specimen Label.  
Hanging garden. 

James F. Fowler, 1060.  9/7/1992. 		 
     with Jon Hak and C. Keleher
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28.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Washakie County: Tensleep Preserve, The Nature Conservancy: southwest flank, foothills of the Big Horn Mountains, ca 10 mi E of Ten Sleep, Canyon Creek watershed, bottom of Canyon Creek Canyon.  Old Maid Gulch quad.  Elev. 5424 ft.
44.013 N, 107.2733 W; GPS Reading.  
Found growing with Populus angustifolia, Prunus virginiana, Pinus ponderosa, Mahonia repens, Toxicodendron rydbergii, Shepherdia canadensis, Spiraea betulifolia var. lucida, Symphoricarpos oreophilus, Clematis occidentalis, Allium brevistylum, Thalictrum Phenology: fruiting. 

Daniel T. Busemeyer, 1961.  6/15/2004. 		RM 785938	Barcode: RM0215577
     with Leland Crane, David M. Ketzner, Mary Ann Feist, Richard L. Larimore,
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29.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Idaho, Adams County: Payette National Forest and Vicinity: trail from Eagle Bar to Red Ledge Mine along Snake River, 18 air mi W of Pinehurst.  Elev. 1760-3240 ft.
T22N R3W S28 NE1/4; also W1/2 of NW1/4 S27 and W1/2 of S22.  45.2179 N, 116.7099 W.  
Rocky volcanic canyon land along river; Elymus spicatus and annual grasses with scattered shrubs. Phenology: flowering. 

Ronald L. Hartman, 64297.  6/2/1999. 		RM 
     with Joy Handley
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30.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Gunnison County: Northern Gunnison Basin: ca 4 air mi E of Paonia Reservoir.  Elev. 6900-7400 ft.
T13S R88W S5 NW1/4.  38.9543 N, 107.2473 W.  
Gambels oak forest up drainage; Prunus, Symphoricarpos, and Amelanchier. Phenology: vegetative only. 

Kevin J. Taylor, 10586.  8/17/1998. 		 772916
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31.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Gunnison County: Northern Gunnison Basin: ca 2 air mi S of Paonia Reservoir.  Elev. 7550-7900 ft.
T13S R89W S16 SW1/4.  38.925 N, 107.3404 W.  
Oak forest and opening and along sandstone cliffs; Prunus, Douglas-fir, Symphoricarpos; also, aspen forest with dense 5 ft tall Pteridium understory. Phenology: vegetative only. 

Kevin J. Taylor, 7231.  6/26/1998. 		 772917
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32.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Arizona, Gila County: Tonto National Forest: Parker Creek Branch Station.  Elev. 5070 ft.
T5N R13E S1.  
5 degree southwest slope; moist boulders; with Platanus, Alnus, Juglans and Quercus arizonica. Phenology: fruiting. 

Elbert L. Little Jr., 4007.  8/17/1935. 		USFS 512383
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33.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: breaks ca 12.5 air mi ESE of Oelrichs.  Elev. 3200-3380 ft.
T11S R9E S12 NW1/4; also SW1/4 S1.  43.1141 N, 103.0053 W; GPS Reading.  
Draws, gullies, and drainage channels in the breaks. Phenology: vegetative only. 

B. E. Nelson, 60554.  5/14/2004. 		RM 
     with Grace Kostel
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34.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: along South Branch Blacktail Creek, ca 10.5 mi ESE of Oelrichs.  Elev. 3100-3160 ft.
T10S R9E S27 SE1/4.  43.1452 N, 103.0362 W; GPS Reading.  
Stream bottom and adjacent banks. Phenology: vegetative only. 

B. E. Nelson, 60570.  5/14/2004. 		RM 
     with Grace Kostel
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35.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Dawes County: Oglala National Grassland and Vicinity: west end of Wolf Butte, ca 19.5 air mi N of Crawford.  Elev. 3950-4060 ft.
T35N R52W S33 W1/2.  42.9653 N, 103.4629 W to 42.8603 N, 103.5542 W; GPS Reading.  
Ravine. Phenology: vegetative only. 

B. E. Nelson, 60701.  5/17/2004. 		RM 
     with Grace Kostel
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36.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Dawes County: Oglala National Grassland and Vicinity: S of Sugarloaf or Forest Road 900, just E and NE of Strawstack Butte, ca 16.5 air mi NNE of Crawford.  Elev. 3740-3900 ft.
T34N R52W S17 S1/4; also N1/2 S20.  42.9188 N, 103.4733 W to 42.9139 N, 103.4717 W; GPS Reading.  
Chalky bluffs and slopes. Phenology: fruiting. 

B. E. Nelson, 60744.  5/17/2004. 		RM 
     with Grace Kostel
_________________________________________________________________________

37.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: mesa ca 2 1/4 air mi S of French Creek and ca 3/4-1 air mi E of South Fork French Creek, ca 16 air mi SE of Hermosa.  Elev. 3150-3250 ft.
T5S R9E S10 NE1/4.  43 38.1' N, 103 1.99' W; GPS Reading.  
Skunkbush/chokecherry/current thickets on the slopes. Phenology: vegetative only. 

B. E. Nelson, 60863.  5/19/2004. 		RM 
     with Grace Kostel
_________________________________________________________________________

38.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: along Horsehead Creek, ca 3 air mi W of U.S. Hwy 385, ca 9 air mi SSW of Oelrichs.  Elev. 3480 ft.
T11S R7E S33 NE1/4.  43.0565 N, 103.2884 W; GPS Reading.  
Stream banks and channel. Phenology: vegetative only. 

B. E. Nelson, 61000.  5/24/2004. 		RM 
     with Grace Kostel
_________________________________________________________________________

39.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 4.5-5 air mi SE of Wall, 2-2.5 mi S of I-90, channel draining into Whitewater Creek..  Elev. 2650-2750 ft.
T1S R16E S27 E1/2.  43 55.73' N, 102 11.09' W; GPS Reading.  
On badlands in deep channel draining into creek; soils of white, heavy clays. Phenology: buds. 

Grace M. Kostel, 1212.  6/2/2004. 		RM 
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40.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 7 air mi ESE of Fairburn and 0.5 mi N of County Road 18.  Elev. 3050-3150 ft.
T4S R9E S32; W1/2 S13.  43 39.61' N, 103 4.53' W; GPS Reading.  
Abandoned gravel pit of revegetated upland grassy areas; rock and gravel soil. Phenology: vegetative only. 

Grace M. Kostel, 1364.  6/4/2004. 		RM 
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41.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 19 air mi SE of Hermosa.  Elev. 3050 ft.
T4S R10E S13 W1/2.  43 41.75' N, 102 52.59' W to 43 41.53' N, 102 52.63' W; GPS Reading.  
Draw of clay soil. Phenology: flowering. 

Grace M. Kostel, 1411.  6/4/2004. 		RM 
_________________________________________________________________________

42.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 10-10.5 air mi ESE of Fairburn, S of County Road 18 in French Creek.  Elev. 2900 ft.
T4S R9E S35 South1/2.  43 39.16' N, 103 0.5' W; GPS Reading.  
In clay soil along creek and creek banks. Phenology: vegetative only. 

Grace M. Kostel, 1441.  6/4/2004. 		RM 
_________________________________________________________________________

43.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 7-7.5 air mi NW of Crawford.  Elev. 3900-4000 ft.
T32N R53W S11 NE1/4.  42 45' N, 103 30.72' W; GPS Reading.  
On pine ridge of gravel and sand; pine woodland. Phenology: vegetative only. 

Grace M. Kostel, 1650.  6/7/2004. 		RM 
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44.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 8-8.5 air mi NW of Edgemont and 3 mi W of County Road 9.  Elev. 3650-3800 ft.
T8S R1E S14 W1/2.  43 21.09' N, 103 58.48' W to 43 21.32' N, 103 58.48' W; GPS Reading.  
On mesa tops and slopes; sand and rock soil. Phenology: vegetative only. 

Grace M. Kostel, 1901.  6/11/2004. 		RM 
_________________________________________________________________________

45.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 5.5-6 air mi SW of Edgemont.  Elev. 3650-3850 ft.
T9S R2E S19 N1/2.  43.2528 N, 103.9264 W; uncertainty 0.5 mi..  
On juniper ridges of rock and shale. Phenology: flowering. 

Grace M. Kostel, 1978.  6/11/2004. 		RM 
_________________________________________________________________________

46.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 27.5-28 air mi NW of Crawford.  Elev. 3850-3950 ft.
T34N R56W S25 NW1/4.  42 53.71' N, 103 52.59' W; GPS Reading.  
On ridge of rockand sand. Phenology: vegetative only. 

Grace M. Kostel, 2250.  6/14/2004. 		RM 
_________________________________________________________________________

47.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 14.5-15 air mi ENE of Hermosa and 4 air mi WSW of Railroad Buttes.  Elev. 3100-3200 ft.
T2S R10E S15 South1/2.  42 52.91' N, 102 55.05' W; GPS Reading.  
On ridge of rock and gravel. Phenology: fruiting. 

Grace M. Kostel, 2438.  6/21/2004. 		RM 
_________________________________________________________________________

48.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 17 air mi SSE of Hermosa.  Elev. 2950-3100 ft.
T4S R10E S20 SE1/4.  43 40.67' N, 102 56.9' W; GPS Reading.  
On ridge of rock and slopes and upland of clay soil. Phenology: vegetative only. 

Grace M. Kostel, 2653.  6/26/2004. 		RM 
_________________________________________________________________________

49.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 17-17.5 air mi SE of Hermosa and 1.5-2 mi NNW of Red Shirt and 1-1.5 mi W of SD Hwy 40.  Elev. 2800-2950 ft.
T4S R10E S22; NE1/4.  43 41.63' N, 102 54.4' W; GPS Reading.  
In draws and on ridge tops. Phenology: vegetative only. 

Grace M. Kostel, 2767.  6/25/2004. 		RM 
_________________________________________________________________________

50.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 19-19.5 air mi SE of Hermosa and 2 air mi SW of Red Shirt and 0.5 miW of SD Hwy 40.  Elev. 2900-2950 ft.
T4S R10E S24 SW1/4.  43 40.59' N, 102 53.41' W; GPS Reading.  
In prarie dog town with soils of silt and clay. Phenology: vegetative only. 

Grace M. Kostel, 2794.  6/25/2004. 		RM 
_________________________________________________________________________

51.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 16.5 air mi ENE of Hermosa and 0.5 mi W of County Road 121.  Elev. 3050-3200 ft.
T2S R10E S24 SE1/4.  43 51.57' N, 102 51.36' W; GPS Reading.  
On butte and butte slopes of clay and gravel soil. Phenology: fruiting. 

Grace M. Kostel, 3036.  6/28/2004. 		RM 
_________________________________________________________________________

52.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 12.5-13 air mi WNW of Edgemont immediately E of Wyoming/South Dakota stateline. North of the Cheyenne River.  Elev. 3900-3950 ft.
T8S R1E S6 SW1/4.  43 22.74' N, 104 3.61' W; GPS Reading.  
In silt and revegetated, stabilized banks of sand north of the river.  Area is severely overgrazed. Phenology: vegetative only. 

Grace M. Kostel, 3175.  7/2/2004. 		RM 
_________________________________________________________________________

53.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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.  
Rock slopes and buttes of Juniper leading into clay based drainages. Phenology: vegetative only. 

Grace M. Kostel, 3237.  7/2/2004. 		RM 
_________________________________________________________________________

54.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Dawes County: Oglala National Grassland and Vicinity: ca 18.5-19 air mi NNW of Crawford and just S of Forest Road 909.  Elev. 3850-3950 ft.
T35N R52W S34 SW1/4.  42 56.73' N, 103 27.05' W; GPS Reading.  
In Juniper horizontalis draw of rock, gravel and sand. Phenology: vegetative only. 

Grace M. Kostel, 3375.  7/6/2004. 		RM 
_________________________________________________________________________

55.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 14 mi NNE of Smithwick and immediately S of the Fall River and Custer County lines.  Elev. 3000-3050 ft.
T7S R9E S4 NW1/4.  43 28.26' N, 103 4.15' W; GPS Reading.  
On ridgetop of sand and silt soils. Phenology: vegetative only. 

Grace M. Kostel, 3551.  7/11/2004. 		RM 
_________________________________________________________________________

56.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: between Shorty Draw and French Creek, ca 9 air mi E of Fairburn and 14.5 air mi SE of Hermosa.  Elev. 3030-3080 ft.
T4S R9E S27 SE1/4.  43.6659 N, 103.0281 W; GPS Reading.  
Ridge sideslopes. Phenology: vegetative only. 

Grace M. Kostel, 364.  5/19/2004. 		RM 
     with B. E. Nelson
_________________________________________________________________________

57.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 12.5-13 air mi NW of Crawford.  Elev. 4500-4800 ft.
T33N R53W S30 SW1/4.  42 48.18' N, 103 37.59' W; GPS Reading.  
On rocky ridge and side slopes. Phenology: vegetative only. 

Grace M. Kostel, 3768.  7/15/2004. 		RM 
_________________________________________________________________________

58.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 12.5-13 air mi NW of Crawford.  Elev. 3700-4000 ft.
T33N R53W S21 N1/2.  42 49.69' N, 103 34.97' W; GPS Reading.  
In deep drainage. Phenology: vegetative only. 

Grace M. Kostel, 3783.  7/15/2004. 		RM 
_________________________________________________________________________

59.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: 3 1/4 air mi W and 1 air mi N of Cheyenne River, 5.5 air mi WSW of Red Shirt.  Elev. 2820-2920 ft.
T5S R9E S12 NW1/4.  43.637 N, 102.9958 W; GPS Reading.  
Sand side banks of vegetated, stabilized sand dunes. Phenology: vegetative only. 

Grace M. Kostel, 381.  5/19/2004. 		RM 
     with B. E. Nelson
_________________________________________________________________________

60.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 22 air mi ENE of Hermosa and 1 mi W of Swinehart Hill on Rapid Creek.  Elev. 2600 ft.
T1S R11E S35 N1/2.  43 55.25' N, 102 45.4' W; GPS Reading.  
On the banks of the creek. Phenology: vegetative only. 

Grace M. Kostel, 3912.  7/16/2004. 		RM 
_________________________________________________________________________

61.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 7.5 air mi W of Scenic, near Spring Draw.  Elev. 2750-2800 ft.
T3S R13E S16 SW1/4.  43 46.93' N, 102 34.9' W; GPS Reading.  
On sand bluffs overlooking draw. Phenology: vegetative only. 

Grace M. Kostel, 4000.  7/16/2004. 		RM 
_________________________________________________________________________

62.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: County Road 18 N of French Creek and 11/4 air mi W of Cheyenne River about 3 air mi WSW of Red Shirt, ca 18 mi SE of Hermosa.  Elev. 2770-2870 ft.
T5S R10E S5 NE1/4.  43.6505 N, 102.9544 W; GPS Reading.  
Upslope of side drainage into creek. Phenology: flowering. 

Grace M. Kostel, 406.  5/19/2004. 		RM 
     with B. E. Nelson
_________________________________________________________________________

63.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 8.5 air mi SE of Hermosa in Red Shirt Creek.  Elev. 2850-3100 ft.
T4S R10E S16 E1/2.  43 42.75' N, 102 55.11' W to 43 41.19' N, 102 55.03' W; GPS Reading.  
In drainage of creek and steep slopes of drainage; soils are rock substrate with clayey silt. Phenology: vegetative only. 

Grace M. Kostel, 4239.  7/29/2004. 		RM 
_________________________________________________________________________

64.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: County Road 18, ca 2 air mi E of Fairburn.  Elev. 3240 ft.
T4S R8E S28 NW1/4.  43.6774 N, 103.1756 W; GPS Reading.  
Along road and roadside ditch. Phenology: vegetative only. 

Grace M. Kostel, 428.  5/19/2004. 		RM 
     with B. E. Nelson
_________________________________________________________________________

65.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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: vegetative only. 

Grace M. Kostel, 4337.  8/3/2004. 		RM 
     with Steve Popovich
_________________________________________________________________________

66.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: canyon N of Moss Agate Creek ca 0.5 - 1 mi S of County Road 9C, 10.5 -11 air mi NW of Edgemont.  Elev. 3700-3880 ft.
T8S R1E S8 SW1/4; also NE1/4 of NE1/4 S17.  43.3656 N, 104.0238 W to 43.3595 N, 104.0156 W; GPS Reading.  
Draw and draw bank edges. Phenology: vegetative only. 

Grace M. Kostel, 502.  5/21/2004. 		RM 
     with B. E. Nelson
_________________________________________________________________________

67.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 8.5 air mi WNW of Edgemont and 2.5 air mi N of U.S. Hwy 18 in side drainage of Moss Agate Creek.  Elev. 3700-3800 ft.
T8S R1E S15 SW1/4.  43 20.5' N, 104 1.16' W; GPS Reading.  
Top of slope. Phenology: buds. 

Grace M. Kostel, 793.  5/28/2004. 		RM 
_________________________________________________________________________

68.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 19.5-20 air mi SSW of Wall.  Elev. 2650-2700 ft.
T4S R15E S10 W1/2.  43 42.723' N, 102 18.929' W; GPS Reading.  
On a mesa top and northeast facing slopes, soils are sand. Phenology: vegetative only. 

Grace M. Kostel, 4983.  5/27/2005. 		RM 
_________________________________________________________________________

69.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 1 air mi SSE of Wall and adjacent to the Badlands National Park boundary line fence.  Elev. 3000-3050 ft.
T2S R16E S8 N1/2.  43 53.23' N, 102 13.81' W; GPS Reading.  
Badlands cliffs; upland soils are of clay loam with cliff edges eroding into clay layers. Phenology: vegetative only. 

Grace M. Kostel, 5215.  5/30/2005. 		RM 
_________________________________________________________________________

70.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 9 air mi ESE of Scenic and 1 air mi S of SD Hwy 44 on Bouquet Table.  Elev. 2700 ft.
T4S R15E S10 NE1/4.  43 42.52' N, 102 18.86' W; GPS Reading.  
In a Hesperostipa comata upland plant community in silt-loam soils at edge of table overlooking badlands floodplain. Phenology: flowering. 

Grace M. Kostel, 5298.  5/30/2005. 		RM 
_________________________________________________________________________

71.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Dawes County: Oglala National Grassland and Vicinity: ca 12-12.5 air mi SE of Ardmore, South Dakota.  Elev. 3949 ft.
T34N R52W S5 E1/2.  42 57.052' N, 103 28.018' W; GPS Reading.  
In rock bed with silt and clay soils. Phenology: vegetative only. 

Grace M. Kostel, 5597.  6/6/2005. 		RM 
_________________________________________________________________________

72.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: near Cottonwood Creek, ca 2.5 air mi SE of Quinn on an abandoned county road now known as Forest Road 7117.  Elev. 2781 ft.
T1S R17E S9 SE1/4.  43 57.94' N, 102 4.97' W; GPS Reading.  
In side drainage of creek in soils of silty loam. Phenology: vegetative only. 

Grace M. Kostel, 5829.  6/11/2005. 		RM 
_________________________________________________________________________

73.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Jackson County: Buffalo Gap National Grassland and Vicinity: ca 4.5-5 air mi SE of Cottonwood on Forest Road 7178, S of County Road 26.  Elev. 2403 ft.
T1S R19E S14 SE1/4.  43 57.33' N, 102 48.378' W; GPS Reading.  
In drainage course between two reservoirs, soils are silty clay. Phenology: vegetative only. 

Grace M. Kostel, 5843.  6/11/2005. 		RM 
_________________________________________________________________________

74.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: near Cottonwood Creek, ca 11 air mi ESE of Wall on an abandoned county roadbed now known as Forest Road 7117.  Elev. 2513 ft.
T1S R17E S13 N1/2.  43 57.952' N, 102 1.749' W; GPS Reading.  
In side drainage of creek in soils of silty loam. Phenology: vegetative only. 

Grace M. Kostel, 5869.  6/11/2005. 		RM 
_________________________________________________________________________

75.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Jackson County: Buffalo Gap National Grassland and Vicinity: ca 3 air mi SW of Cottonwood on County Road CS24.  Elev. 2651 ft.
T1S R18E S22 South1/2.  43 56.7' N, 101 57.56' W; GPS Reading.  
On rolling prairie uplands in silty loam soils. Phenology: vegetative only. 

Grace M. Kostel, 5922.  6/11/2005. 		RM 
_________________________________________________________________________

76.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Jackson County: Buffalo Gap National Grassland and Vicinity: ca 2 air mi due W of Cottonwood.  Elev. 2577 ft.
T1S R18E S15 SW1/4.  43 57.942' N, 101 57.422' W; GPS Reading.  
On abandoned county road in gravel and sand hilltop. Phenology: vegetative only. 

Grace M. Kostel, 5935.  6/11/2005. 		RM 
_________________________________________________________________________

77.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Jackson County: Buffalo Gap National Grassland and Vicinity: ca 2 air mi due W of Cottonwood.  Elev. 2577 ft.
T1S R18E S15 SW1/4.  43 57.942' N, 101 57.422' W; GPS Reading.  
On abandoned county road in gravel and sand hilltop. Phenology: vegetative only. 

Grace M. Kostel, 5957.  6/11/2005. 		RM 
_________________________________________________________________________

78.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Arizona, Coconino County: Coconino National Forest.  Elev. 6700 ft.
T20N R7E S29.  
West slope, among cliffs. Coconino/Yavapai counties. Phenology: fruiting. 

H. D. Burrall, 365.  7/1/1909. 		USFS 512371
_________________________________________________________________________

79.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Rio Arriba County: Carson National Forest and Vicinity: east rim of Rio Grande from NM Hwy 68 SE toward Canada de Apodaca, ca 0.5 air mi NE of Rinconada.  Elev. 6050-6350 ft.
T23N R10E S15 SE1/4; also NW1/4 S14.  36.2236 N, 105.8635 W; GPS Reading.  
Area around flowing spring, surrounded by pinyon/juniper woodland. Phenology: flowering & fruiting. 

Jill E. Larson, 4885.  5/18/2006. 		RM 949207	Barcode: RM0153983
_________________________________________________________________________

80.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Arizona, Cochise County: Chiricahua Mountains: Chaperon Canyon.  Elev. 7900 ft.
T17S R30E S33.  
Narrow, shady gulch. Phenology: flowering & fruiting. 

J. C. Blumer, 1325.  7/1/1907. 		RM 164878
_________________________________________________________________________

81.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: ca 1.5 mi SW on NM Hwy 68 from NM Hwy 75, ca 0.5 mi SW along Rio Grande.  Elev. 5850 ft.
T23N R9E S24.  36.2114 N, 105.938 W; GPS Reading.  
Roadside to river edge. Phenology: flowering. 

Ronald L. Hartman, 81993.  5/22/2006. 		RM 949249	Barcode: RM0154152
_________________________________________________________________________

82.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Rio Arriba County: Carson National Forest and Vicinity: NM Hwy 68, just south of Taos county line.  Elev. 6540 ft.
T23N R10E S15.  36.1725 N, 105.831 W; GPS Reading.  
Phenology: flowering. 

Ronald L. Hartman, 82133.  5/22/2006. 		RM 949206	Barcode: RM0153984
_________________________________________________________________________

83.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Washakie County: Bighorn Basin: ridge leading NW off Lightning Ridge on the Nowater Trail or BLM Road 1404, ca 10 air mi SW of Big Trails; ca 36 air mi SE of Worland.  Elev. 5460-5500 ft.
T43N R88W S30 NE1/4.  43.6647 N, 107.4604 W; uncertainty 0.5 mi..  
Bottom of small canyon below a spring. Phenology: fruiting. 

B. E. Nelson, 57467.  7/14/2002. 		RM 803797	Barcode: RM0097639
_________________________________________________________________________

84.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Montrose County: San Miguel and lower Dolores River Drainages: San Miguel River Drainage: along Cottonwood Creek ca 1 mi ENE of Pinon.  Elev. 6000 ft.
T46N R14W S2.  38.2701 N, 108.3803 W.  
Riparian along creek with Populus and Salix, and adjacent dry grazed areas with oak. Phenology: flowering. 

Margarette J. Lyon, 1655.  6/18/1993. 		 
_________________________________________________________________________

85.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Mesa County: San Miguel and Lower Dolores River Drainages: Uncompahgre Plateau: Indian Creek.  Elev. 6800 ft.
T50N R17W S6.  38.6267 N, 108.8037 W.  
Riparian area with Populus angustifolia, Cornus sericea, and Acer negundo. Phenology: flowering & fruiting. 

Margarette J. Lyon, 3966.  6/3/1994. 		 
_________________________________________________________________________

86.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Fremont County: East Slope Wind River Range and Vicinity: southeast side of Fairfield Hill, ca 6 air mi SW of Lander.  Elev. 7400-8120 ft.
T32N R101W S13 South1/2.  42.7405 N, 108.8389 W to 42.7442 N, 108.845 W; GPS Reading.  
Juniper woodland/sagebrush grassland on steep slopes beneath limestone cliffbands. Phenology: vegetative only. 

Rob Massatti, 293.  6/13/2005. 		USFS 842545	Barcode: USFS0026101
_________________________________________________________________________

87.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Fremont County: East Slope Wind River Range and Vicinity: Deep Creek drainage and vicinity, ca 16 air mi SSE of Lander.  Elev. 7090-7320 ft.
T30N R99W S4 NE1/4; also NW1/4 S3 and T31N R99W S33 SE1/4 and SW1/4 S34.  42.6062 N, 108.666 W; GPS Reading.  
Steep south-facing slope predominantly Purshia tridentata and Artemisia tridentata var. vaseyana grassland. Phenology: flowering. 

Rob Massatti, 58.  6/10/2005. 		USFS 842546	Barcode: USFS0026102
_________________________________________________________________________

88.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Fremont County: East Slope Wind River Range and Vicinity: south ridge of Sheep Canyon, ca 4.5 air mi SW of Lander.  Elev. 6070-7850 ft.
T32N R100W S8; also W1/2 S9 and NE1/4 S18.  42.758 N, 108.799 W to 42.7485 N, 108.8233 W; GPS Reading.  
Rocky mixed shrubland and grassland on limestone. Phenology: vegetative only. 

Rob Massatti, 4542.  5/23/2006. 		USFS 842544	Barcode: USFS0026100
_________________________________________________________________________

89.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Fremont County: East Slope Wind River Range and Vicinity: ca 3 mi SW of Weiser Knoll; ca 15 air mi SSE of Lander.  Elev. 6780-7130 ft.
T30N R99W S2 N1/2; also NE1/4 S3 and T31N R99W S34, S27 and W1/2 S35.  42.6015 N, 108.6259 W to 42.6291 N, 108.6488 W; GPS Reading.  
Rocky meadow on limestone. Phenology: vegetative only. 

Rob Massatti, 4724.  5/25/2006. 		USFS 842543	Barcode: USFS0026099
_________________________________________________________________________

90.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Fremont County: East Slope Wind River Range and Vicinity: Sawmill Creek near Middle Popo Agie River, ca 5 air mi SW of Lander.  Elev. 6100-6260 ft.
T32N R100W S9 SW1/4; also NW1/4 S16.  42.7554 N, 108.7941 W to 42.7507 N, 108.7963 W; GPS Reading.  
Sagebrush shrubland. Phenology: flowering. 

Rob Massatti, 5738.  6/21/2006. 		USFS 842542	Barcode: USFS0026098
_________________________________________________________________________

91.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Montrose County: Upper Dolores River Drainage and Adjacent Areas: ca 21 air mi WNW of Naturita along La Sal Creek at the Cliff Dweller Mine, County Road X4, SE of Colo. Hwy 90.  Elev. 5600 ft.
T47N R19W S21; also S22.  38.314 N, 108.9715 W.  
Boxelder, Fraxinus, pinyon-juniper, ponderosa, and poison ivy; riparian zone along creek and north facing canyon slopes and walls. Phenology: fruiting. 

Lynn Marie Moore, 5558.  6/17/1995. 		 
_________________________________________________________________________

92.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Dolores County: Upper Dolores River Drainage and Adjacent Areas: ca 4 air mi NE of Dove Creek near Dove Creek Pump Station along the Dolores River, County Road 10.00.  Elev. 6000-6100 ft.
T41N R18W S12; also S14 and S23.  37.8284 N, 108.8009 W.  
Riparian area  and canyon slopes with Rhus, Quercus, ponderosa, pinyon-juniper, Apocynum, poison ivy, and boxelder; east facing slope. Phenology: fruiting. 

Lynn Marie Moore, 5968.  6/22/1995. 		 
_________________________________________________________________________

93.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Carbon County: Wetlands and Adjacent Areas: Morgan Creek, ca 30 air mi NE of Rawlins.  Elev. 6362 ft.
T25N R84W S5 SW1/4.  42.1618 N, 106.9235 W; GPS Reading.  
Dry uplands. Phenology: fruiting. 

Rachel Newton, 3024.  8/3/2005. 		RM 
_________________________________________________________________________

94.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Catron County: Mogollon Mountains: on or near West Fork Gila River.  Elev. 7500 ft.
T11S R16W S21.  
Phenology: fruiting. 

O. B. Metcalfe, 339.  8/2/1903. 		RM 55568
_________________________________________________________________________

95.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Larimer County: Roosevelt National Forest: Front Range: Young Gulch Trail on Colo Hwy 14, 1 mi from trailhead, ca 13 air mi NW of Fort Collins.  Elev. 6000-6400 ft.
T8N R71W S4 SE1/4.  40.6909 N, 105.3543 W; uncertainty 0.5 mi..  
Wet creekside with Thermopsis and Salix leading up to a dry hillside with Cercocarpus and Lesquerella. Phenology: fruiting. 

Sarah Nunn, 733.  6/1/2001. 		RM 765864
_________________________________________________________________________

96.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Palmer Canyon: 15 mi W of Wheatland.  Elev. 5300 ft.
T24N R70W S15.  42.0583 N, 105.2275 W; NAD 83, uncertainty 1 mi., Digital Map.  
Sprawling on the ground in aspen woods. Phenology: vegetative only. 

C. L. Porter, 4415.  9/10/1947. 		RM 207434	Barcode: RM0215625
_________________________________________________________________________

97.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Washakie County: At the lower end of Tensleep Canyon.  Elev. 5400 ft.
T48N R87W S33.  44.0804 N, 107.3141 W; NAD 83, uncertainty 1 mi., Digital Map.  
Common in canyon. Phenology: vegetative only. 

C. L. Porter, 5752.  7/12/1951. 		RM 222610	Barcode: RM0215628
_________________________________________________________________________

98.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Washakie County: Big Horn Range: lower end of Tensleep Canyon.  Elev. 5000 ft.
T47N R87W S5.  44.0732 N, 107.3395 W; NAD 83, uncertainty 1 mi., Digital Map.  
Plants sprawling. Phenology: vegetative only. 

C. L. Porter, 8247.  6/28/1960. 		RM 262973	Barcode: RM0215629
     with Marjorie W. Porter
_________________________________________________________________________

99.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Carbon County: In the canyon below Seminoe Dam on the North Platte River.  Elev. 6900 ft.
T25N R84W S5.  42.1589 N, 106.9087 W; NAD 83, uncertainty 0.5 mi., Digital Map.  
Common among rocks in brushy places. Phenology: fruiting. 

C. L. Porter, 8525.  8/20/1960. 		RM 262965	Barcode: RM0215624
     with Marjorie W. Porter
_________________________________________________________________________

100.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: Cochiti Canyon, 4.3 air mi SSE of Rabbit Mountain. From crossing of Trail 113 SE 1.3 mi in canyon.  Elev. 7200-8280 ft.
T18N R5E S19 NE1/4; also W1/2 S20 and NE1/4 S29.  35 46.764' N, 106 26.194' W to 35 45.872' N, 106 25.593' W; GPS reading.  
Canyon bottom and riparian. Phenology: flowering. 

Brian Reif, 1183.  6/23/2003. 		RM 805543
_________________________________________________________________________

101.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: NM Hwy 126 at Horseshoe Spring, NW 0.3 air mi to rim of Eureka Mesa.  Elev. 7900-8400 ft.
T20N R1E S6 NE1/4.  35 59.694' N, 106 52.703' W; GPS reading.  
Steep slope of Gambels oak on soft red beds. Phenology: vegetative only. 

Brian Reif, 127.  6/2/2002. 		RM 805545
_________________________________________________________________________

102.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Rio Arriba County: Santa Fe National Forest and Vicinity: Jemez Mountains: Canyon de la Alameda to Rio Gallina, 14 air mi NNE of Gallina. SW for 1 air mi in canyon to Rio Gallina then 0.4 air mi E along river.  Elev. 6700-6900 ft.
T25N R2E S8; also NW1/4 S17.  36 24.844' N, 106 45.119' W; GPS reading.  
Steep-walled drainage of mixed conifers. Phenology: fruiting. 

Brian Reif, 2086.  7/11/2002. 		RM 805542
_________________________________________________________________________

103.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: Rito de las Vacas and campground off NM Hwy 126, 9 air mi E of Cuba. From campground 0.6 air mi along Rito Vacas, then exiting west slope and returning to start.  Elev. 8300-8700 ft.
T20N R1E S2 NW1/4; also T21N R1E SW1/4 S35.  35 59.7923' N, 106 48.415' W; GPS reading.  
Riparian and grassy banks at campground. Phenology: fruiting. 

Brian Reif, 2454.  7/17/2002. 		RM 805541
_________________________________________________________________________

104.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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: fruiting. 

Brian Reif, 2800.  7/28/2002. 		RM 805540
_________________________________________________________________________

105.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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. 7760 ft.
T17N R11E S26 E1/2.  35 40.269' N, 105 44.472' W; GPS reading.  
Wet to dry meadow and riparian with canyon constricting to the W. Phenology: flowering. 

Brian Reif, 3396.  8/6/2002. 		RM 805507
_________________________________________________________________________

106.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Forest Road 263 along Gallinas Creek, 16 air mi NW of Las Vegas. From Fishing Hole Picnic Area 0.3 mi in both directions along creek.  Elev. 7750 ft.
T17N R14E S15 N1/2.  35 42.495' N, 105 27.031' W; GPS reading.  
Canyon bottom roadside, riparian, and bluffs of volcanic rock in mixed conifer forest. Phenology: fruiting. 

Brian Reif, 3865.  8/13/2002. 		RM 805506
_________________________________________________________________________

107.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: Battleship Rock Forest Recreation Site, 2.8 air mi S of La Cueva, following Trail 137 on East Fork Jemez River for 0.7 mi.  Elev. 6755-7000 ft.
T19N R3E S5 N1/2.  35 49.741' N, 106 38.733' W to 35 49.37' N, 106 38.18' W; GPS reading.  
Riparian in steep-walled forested canyon of ponderosa pine/Douglas fir. Phenology: flowering. 

Brian Reif, 556.  6/11/2002. 		RM 805544
_________________________________________________________________________

108.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: on NM Hwy 3 along Pecos River W of Villanueva State Park, 10 air mi SSE of I-25/NM Hwy 3 junction.  Elev. 5800 ft.
T12N R15E S17 N1/2.  35.2724 N, 105.3714 W; GPS Reading.  
Roadside corridor with pinyon/juniper woodland on sedimentary slope to north; irrigation ditch and riparian of cottonwood, Russian olive to south. Phenology: vegetative only. 

Brian Reif, 4839.  6/2/2003. 		RM 805505
_________________________________________________________________________

109.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: Dome Wilderness: Capulin Canyon below Los Utes Spring, 2 air mi W of Bandelier National Monument.  Elev. 7360-7540 ft.
T18N R5E S22 South1/2.  35.773 N, 106.386 W to 35.774 N, 106.399 W; GPS Reading.  
Riparian and canyon bottom through burn and with thick deadfall; surrounding mixed conifer forest with thick locust/Gambels oak stands below. Phenology: flowering. 

Brian Reif, 5471.  6/16/2003. 		RM 805504
_________________________________________________________________________

110.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Pecos Wilderness: Rio Medio Trail 155 adjacent to Rio Medio, 6 air mi due W of Truchas Peak. SE 0.3 air mi along trail.  Elev. 8300 ft.
T20N R11E S9 E1/4; also S15.  35.967 N, 105.764 W; GPS Reading.  
Canyon bottom adjacent the river, or trailside lower slope of spruce forest. Phenology: flowering. 

Brian Reif, 5831.  6/23/2003. 		RM 805503
_________________________________________________________________________

111.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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; N35.8129 W105.4480 at corral NW 0.3 air mi to Surprise Valley Ranch at N35.8168 W105.4518.  Elev. 8000 ft.
T18N R14E S3 W1/2.  35.8168 N, 105.4518 W to 35.8129 N, 105.448 W; GPS Reading.  
Roadside in canyon bottom and south-facing slope of mixed conifers/mature aspen; mostly ponderosa pine in exposed areas. Phenology: fruiting. 

Brian Reif, 8817.  8/18/2003. 		RM 805502
_________________________________________________________________________

112.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: Battleship Rock Trail 137 at McCauley Warm Springs, 5 air mi NNE of Jemez Springs.  Elev. 7300-7400 ft.
T18N R3E S4 W1/2.  35.8222 N, 106.6281 W; GPS Reading.  
Warm springs and riparian drainage in ponderosa pine forest. Phenology: fruiting. 

Brian Reif, 9381.  9/1/2003. 		RM 805501
_________________________________________________________________________

113.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Hot Springs County: Owl Creek/Bridger Mountains: cliffs on east side of Wind River Canyon, ca 12 air mi SSE of Thermopolis; ca 20 air mi N of Shoshoni.  Elev. 4640-5800 ft.
T6N R6E S15; also T41N R94W S21 and S28.  
Wet spring areas on west-facing slope. 

Robin Jones, 2096.  7/13/1991. 		RM 
     with Clay Lippencott
_________________________________________________________________________

114.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Laramie County: Pole Creek near Table Mountain.  Elev. 7200 ft.
T15N R70W S15.  41.2684 N, 105.2205 W; uncertainty 2 mi..  
Phenology: fruiting. 

Aven Nelson, 154.  6/2/1894. 		RM 3958	Barcode: RM0215622
_________________________________________________________________________

115.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Hartville.  Elev. 4700-4800 ft.
T27N R66W S12.  42.3271 N, 104.7273 W; NAD 83, uncertainty 0.75 mi., Nat. Geog. TOPO!.  
Phenology: fruiting. 

Aven Nelson, 557.  7/15/1894. 		RM 3733	Barcode: RM0215623
_________________________________________________________________________

116.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Laramie County: Ca 22 mi E of U.S. Hwy 85 along Chalk Bluffs Road, S of Cheyenne.  Elev. 5400 ft.
T13N R63W S32.  41.036 N, 104.4514 W; uncertainty 1 mi..  
Bluffs near microwave tower, along dry creek bed; in sandy soil in small ravines with Rosa arkansana, Rhus trilobata, and Delphinium geyeri. Common. Phenology: vegetative only. 

Barry Hammel, 351.  6/24/1976. 		RM 302016	Barcode: RM0215619
_________________________________________________________________________

117.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Washakie County: Rocky creek bank of Nowood River in Mahogany canyon.  Elev. 5050 ft.
T34N R88W S35 NW1/4 of SE1/4.  42.8732 N, 107.3528 W; uncertainty 0.25 mi..  
The streambank is mostly shrub thicket with Cornus stolonifera, Rosa woodsii, Salix, Ribes aureum, Rhus trilobata, and small trees including Acer negundo and Betula occidentalis. Phenology: flowering. 

David L. Martin, 1565.  6/24/1981. 		RM 337638	Barcode: RM0215627
_________________________________________________________________________

118.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Carbon County: Freezeout Hills.  Elev. 6900-8300 ft.
T24N R79W S3.  42.0823 N, 106.2737 W; uncertainty 9+ mi..  
Phenology: flowering. 

Elias Nelson, 4857.  7/11/1898. 		RM 12331	Barcode: RM0215621
_________________________________________________________________________

119.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Casper Mountain area: just above Garden Creek Falls.  Elev. 6900 ft.
T32N R79W S5.  42.7733 N, 106.3326 W; uncertainty 1 mi..  
On a talus slope of granite. Phenology: fruiting. 

Francis X. Jozwik, 301.  8/15/1962. 		RM 268547	Barcode: RM0215620
_________________________________________________________________________

120.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: North Platte River: S of U.S. Hwy 26, 0.5 road mi S of Guernsey.  Elev. 4340 ft.
T26N R66W S2.  42.2549 N, 104.7443 W; uncertainty 1 mi..  
Phenology: vegetative only. 

Jan Pollet, 617.  9/2/1989. 		RM 544321	Barcode: RM0215618
_________________________________________________________________________

121.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Laramie County: Pine Bluffs: on northwest slope of bluffs, 5.7 air mi NNM of Pine Bluffs.  Elev. 5220 ft.
T15N R60W S20.  41.2536 N, 104.1134 W; uncertainty 0.5 mi..  
Lush thicket and sagebrush/juniper community. Phenology: vegetative only. 

Karin M. Guernsey, 150.  9/11/1987. 		RM 398837	Barcode: RM0215617
_________________________________________________________________________

122.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Sheridan County: Upper Goose Creek Ditch.  Elev. 4300 ft.
T54N R84W S7.  44.6733 N, 107.0203 W; uncertainty 2 mi..  
Sunny, semi-slidy ditch bank. Phenology: flowering. 

Vie Willits, 188.  6/28/1909. 		RM 68834	Barcode: RM0215626
_________________________________________________________________________

123.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Rapid City, Dark Canyon.  Elev. 3440-4700 ft.
T1N R6E S14.  
Partially shaded hillsides. Phenology: fruiting. 

A. C. McIntosh, 676.  9/14/1924. 		RM 99074	Barcode: RM0215536
_________________________________________________________________________

124.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Meade County: Piedmont.  Elev. 3490 ft.
T3N R6E S10.  44.2316 N, 103.389 W; uncertainty 1 mi..  
Phenology: flowering & fruiting. 

Alice D. Pratt, s.n..  6//1895. 		RM 9235
_________________________________________________________________________

125.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Rapid City: Dark Canyon.  Elev. 3440-4700 ft.
T1N R6E S14.  44.0527 N, 103.3115 W; uncertainty 2 mi..  
Partially shaded hillsides. Phenology: fruiting. 

Arthur C. McIntosh, 676.  9/14/1924. 		RM 99074
_________________________________________________________________________

126.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Sandoval County: Valles Caldera National Preserve: Jemez Mountains: along East Fork Jemez River, ca 3/4 - 1 air mi E of NM Hwy 4, ca 8 air mi NE of Jemez Springs; ca 15 air mi WSW of Los Alamos.  Elev. 7950 ft.
35.8289 N, 106.5768 W; GPS Reading.  
Brushy south-facing slope with large volcanic outcrops. Phenology: fruiting. 

B. E. Nelson, 61483.  7/9/2004. 		RM 770744	Barcode: RM0070193
_________________________________________________________________________

127.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Rapid City.  Elev. 3180-3410 ft.
T1N R7E S1.  44.0748 N, 103.2221 W; uncertainty 1 mi..  
Hillsides. Phenology: fruiting. 

Henry Lee, 559.  7/10/1925. 		RM 106199	Barcode: RM0215537
_________________________________________________________________________

128.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Custer County: Jewel Cave National Monument: Hell Canyon, side canyon on east side SE of old area.  Elev. 5300 ft.
T4S R2E S2 NE1/4.  43.7328 N, 103.8407 W; uncertainty 0.5 mi..  
Side canyon on east side southeast of old area; canyon bottom with ponderosa pine and chokecherry. Phenology: fruiting. 

Hollis Marriott, 9627.  6/22/1985. 		RM 365344	Barcode: RM0215539
_________________________________________________________________________

129.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Pennington County: Harney National Forest: Battle Creek, below Everly Field.  Elev. 4100-4200 ft.
T2S R6E S10.  
Shallow gravel soil; brush type. Phenology: flowering. 

Robert R. Hill, 8.  7/11/1928. 		USFS 512364	Barcode: USFS0069358
_________________________________________________________________________

130.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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: vegetative only. 

S. S. Visher, 244.  7/11/1910. 		RM 69869
_________________________________________________________________________

131.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Fall River County: 
Locality noted on sheet, outside of label. Phenology: fruiting. 

S. S. Visher, 2569.  7/28/1911. 		RM 76332	Barcode: RM0215538
_________________________________________________________________________

132.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Converse County: Laramie Range: confluence of La Bonte and Spring creeks, ca 18 air mi SW of Douglas.  Elev. 5900-6230 ft.
T29N R72W S32 SW1/4.  42.4426 N, 105.5113 W; uncertainty 0.5 mi..  
Creekside Phenology: fruiting. 

B. A. Packer, 2487.  7/30/1997. 		 677754	Barcode: RM0215604
     with J. Brondum and T. McGowan
_________________________________________________________________________

133.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Garfield County: White River National Forest: Glenwood Canyon.  Elev. 6100 ft.
T5S R88W S25.  39.5859 N, 107.2117 W; uncertainty 1 mi..  
Along creeks; level, sandy loam. Phenology: fruiting. 

E. R. Ware, 64.  1/14/1932. 		USFS 512361
_________________________________________________________________________

134.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Laramie Range: east end of Casper Mountain, ca 2 air mi W of the Hat Six Hogback, ca 10 air mi SE of Casper.  Elev. 6600-6900 ft.
T32N R78W S16.  42.7443 N, 106.1969 W.  
Sandstone? cliffs in open ponderosa pine. Phenology: vegetative only. 

B. E. Nelson, 41780.  7/20/1997. 		 677753	Barcode: RM0215608
_________________________________________________________________________

135.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, San Miguel County: Norwood Hill.  Elev. 7000 ft.
Moist shaded north slope. Phenology: flowering. 

Ernest P. Walker, 498.  8/18/1912. 		RM 75747
_________________________________________________________________________

136.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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

Frank Tweedy, 4946.  7//1902. 		RM 42996
_________________________________________________________________________

137.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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

George E. Osterhout, 1725.  8/11/1895. 		RM 164876
_________________________________________________________________________

138.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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

George E. Osterhout, 361.  6/2/1894. 		RM 164875
_________________________________________________________________________

139.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Larimer County: Canon of the Thompson: at the Forks.
Phenology: vegetative only. 

George E. Osterhout, 3631.  8/22/1907. 		RM 164877
_________________________________________________________________________

140.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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.  
Open ponderosa pine forest on rocky southerly facing slope. Phenology: fruiting. 

B. E. Nelson, 42577.  8/12/1997. 		 677752	Barcode: RM0215607
_________________________________________________________________________

141.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Montrose County: San Miguel River Canyon 14 mi W of Naturita.  Elev. 5200-6200 ft.
T47N R17W S24.  38.314 N, 108.6944 W; uncertainty 1 mi..  
Open pinyon-juniper woodland on the south slope of the canyon. Phenology: flowering. 

Hans Beck, 3612.  6/5/1982. 		RM 344483
     with Vlad Siplivinsky
_________________________________________________________________________

142.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, San Miguel County: Pecos River National Forest: Winsor Ranch.  Elev. 8400 ft.
Phenology: fruiting. 

Paul C. Standley, 4011.  6/29/1908. 		RM 223006
_________________________________________________________________________

143.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Laramie Range: between Red and Negro creeks on Hat Six or County Road 606 ca 1.3 air mi W of Banner Mountain, ca 16.5 air mi SE of Casper.  Elev. 6160-6320 ft.
T31N R77W S4 NW1/4.  42.686 N, 106.0789 W.  
Rocky areas. Phenology: vegetative only. 

B. E. Nelson, 43124.  8/19/1997. 		 677751	Barcode: RM0215606
_________________________________________________________________________

144.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Philmont Scout Ranch, near Cimarron: Fourmile Camp.  Elev. 7000 ft.
South exposure. Phenology: vegetative only. 

Ronald L. Hartman, 2739.  8/21/1968. 		RM 296666
_________________________________________________________________________

145.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Chaffee County: Cochetopa National Forest: mouth of Cottonwood canyon, rocky slope to south.  Elev. 8200 ft.
50% north slope, rocky clay soils, in Ponderosa pine and Douglas fir. Phenology: vegetative only. 

Stanley A. Mahan, 7.  9/3/1942. 		 
_________________________________________________________________________

146.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Albany County: Laramie Range: Morton Pass and SSW to 0.7 mi.  Elev. 7200-7400 ft.
T20N R73W S25.  41.6765 N, 105.5279 W.  
Calcareous area. Phenology: vegetative only. 

Ronald L. Hartman, 57873.  6/18/1997. 		 677750	Barcode: RM0215605
     with Timothy W. Chumley
_________________________________________________________________________

147.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Boulder County: Gregory Canyon, near Boulder.
Phenology: fruiting. 

W. W. Robbins, 1607.  6/20/1906. 		RM 56840
_________________________________________________________________________

148.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Baca County: Breaks of Picture Canyon.
T35S R47W S6; also S7.  37.0247 N, 102.7514 W; uncertainty 2 mi..  
Sandy floodplain of creek, beside large boulders. Phenology: fruiting. 

William A. Weber, 18265.  7/13/1991. 		RM 580992
     with R. C. Witmann
_________________________________________________________________________

149.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Idaho, Fremont County: Targhee National Forest: Island Park Plateau: west bank of Henrys Fork, ca 1.5 air mi N of the confluence with Warm River, 11 air mi NE of Ashton.  Elev. 5350 ft.
T9N R44E S6.  
Riparian shrub community, with Cornus sericea, Symphoricarpos albus, Rosa woodsii, Urtica dioica, Heracleum sphondylium, Glyceria striata, Carex lanuginosa and Carex stipata. 

Stuart Markow, 11073.  7/15/1993. 		 
_________________________________________________________________________

150.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Laramie Range: ca 10 air mi SE of Casper on County Road 607, along unnamed dry creek.  Elev. 6200-6500 ft.
T32N R78W S35 SE1/4.  42.7006 N, 106.1576 W.  
Along dry creek beds and surrounding grasslands. Phenology: fruiting. 

B. A. Packer, 5281.  8/12/1998. 		RM 678785	Barcode: RM0215603
     with T. McGowan & J. Brondum
_________________________________________________________________________

151.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Washington, Ferry County: Western Colville National Forest and Vicinity: Deadman Creek Road, ca 2 mi W of Boyds.  Elev. 1600-2200 ft.
T37N R37E S18.  48.7072 N, 118.1647 W.  
Roadside. Phenology: vegetative only. 

Jean Wood, 7666.  8/13/1996. 		 
     with K. Ahlenslager, L. Swartz and J. Nisbet
_________________________________________________________________________

152.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Upper North Platte and Laramie River Drainages: North Platte River S of County Road 408, ca 0.3 air mi E of Pathfinder Dam; ca 9 air mi SW of Alcova townsite.  Elev. 5700 ft.
T29N R84W S24 SW1/4.  42.4675 N, 106.8457 W.  
River banks and adjacent granite rocks; Rhus toxicodendron abundant. Phenology: flowering. 

Amy J. Roderick, 4833.  6/11/1998. 		RM 666173	Barcode: RM0215602
_________________________________________________________________________

153.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Park County: Beartooth Mountains: near the mouth of Clarks Fork Canyon, ca 25.5 air mi NW of Cody, ca 8.5 air mi SW of Clark.  Elev. 4480-4640 ft.
T56N R104W S12.  44.8481 N, 109.3306 W.  
Cracks in granite cliffs; with erect naked stems to 1 m long. Phenology: flowering. 

B. E. Nelson, 15227.  6/2/1988. 		RM 860800	Barcode: USFS0043816
     with Erik Nelson
_________________________________________________________________________

154.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Laramie Mountains: Cottonwood Creek above the falls, ca 23 air mi NW of Wheatland; ca 11 air mi ENE of Laramie Peak.  Elev. 5500 ft.
T27N R70W S16; also S15.  42.3128 N, 105.2539 W; uncertainty 2 mi..  
Stream bank and bench. Phenology: vegetative only. 

B. E. Nelson, 17115.  7/18/1989. 		RM 599808	Barcode: RM0215559
     with Jan Pollet
_________________________________________________________________________

155.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Laramie Mountains: along Fish Creek, ca 10 air mi E of Laramie Peak; ca 20 air mi NW of Wheatland.  Elev. 5470 ft.
T26N R70W S4.  42.2544 N, 105.2511 W; uncertainty 1 mi..  
Cracks and shelves on granitic outcrop. Phenology: fruiting. 

B. E. Nelson, 17212.  7/19/1989. 		RM 599807
     with Jan Pollet
_________________________________________________________________________

156.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 7.5 air mi SSE of Spotted Horse, ca 26 air mi NW of Gillette along Box Elder Draw.  Elev. 4400 ft.
T53N R74W S5 NE1/4.  44.60167 N, 105.7881 W; uncertainty 0.5 mi..  
Occasional on slopes of draw under Prunus. Phenology: fruiting. 

B. E. Nelson, 2033.  9/19/1978. 		RM 322311	Barcode: RM0215586
_________________________________________________________________________

157.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 44 air mi N of Gillette, ca 5.5 air mi S of Montana along North Fork Olmstead Creek.  Elev. 3700 ft.
T57N R72W S22 NW1/4.  44.9142 N, 105.5033 W; uncertainty 1 mi..  
Occasional in loamy clay in bottomland with Populus and Juniperus. Phenology: vegetative only. 

B. E. Nelson, 2150.  9/20/1978. 		RM 322314	Barcode: RM0215585
_________________________________________________________________________

158.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Hot Springs County: Owl Creek/Bridger Mountains: Owl Creek Mountains: lower Jones Creek Canyon, ca 4.5 air mi E of Wind River Canyon, ca 7.5 air mi SE of Thermopolis.  Elev. 4900-5100 ft.
T42N R94W S34.  43.565 N, 108.1258 W; uncertainty 1 mi..  
Brushy canyon bottom. 

B. E. Nelson, 21867.  7/29/1991. 		RM 
_________________________________________________________________________

159.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Hot Springs County: Owl Creek/Bridger Mountains: Bridger Mountains: Ditch Creek Canyon, S and above Buffalo Creek, ca 14 air mi ESE of Thermopolis.  Elev. 6300 ft.
T42N R93W S25; also S36.  43.581 N, 107.9669 W; uncertainty 2 mi..  
Sandstone cliffs and ledges on west canyon rim. 

B. E. Nelson, 21874.  7/31/1991. 		RM 
_________________________________________________________________________

160.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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 river bottom with Glycyrrhiza and Populus. Frequent. Phenology: fruiting. 

B. E. Nelson, 2373.  9/26/1978. 		RM 317782	Barcode: RM0215561
_________________________________________________________________________

161.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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!.  
In clay in the river bottom with Asparagus and Panicum. Frequent. Phenology: fruiting. 

B. E. Nelson, 2408.  9/26/1978. 		RM 317781	Barcode: RM0215560
_________________________________________________________________________

162.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 4.5 air mi NNE of Wheatland on Wyo Hwy 320, along Laramie River.  Elev. 4550 ft.
T25N R67W S19 SW1/4.  42.125 N, 104.9364 W; uncertainty 0.5 mi..  
Common in sandy river bottom with Populus and Symphoricarpos. Phenology: fruiting. 

B. E. Nelson, 2589.  9/29/1978. 		RM 317780	Barcode: RM0215562
_________________________________________________________________________

163.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: in Wolf Creek Canyon above Wolf Post Office (Eaton Ranch), ca 8 air mi S of Dayton, ca 15.5 air mi W of Sheridan.  Elev. 5000 ft.
T55N R86W S6 SE1/4.  44.77028 N, 107.26667 W; uncertainty 1 mi..  
Open Douglas fir-ponderosa pine forest in the canyon. Phenology: vegetative only. 

B. E. Nelson, 3220.  7/8/1979. 		RM 347365	Barcode: RM0215589
_________________________________________________________________________

164.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: in Wolf Creek Canyon above Wolf Post Office (Eaton Ranch), ca 8 air mi S of Dayton, ca 15.5 air mi W of Sheridan.  Elev. 5000 ft.
T55N R86W S6 SE1/4.  44.77028 N, 107.26667 W; uncertainty 1 mi..  
Stony slopes. Phenology: fruiting. 

B. E. Nelson, 3231.  7/8/1979. 		RM 346804	Barcode: RM0215590
_________________________________________________________________________

165.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Sheridan County: Powder River Basin: ca 6.5 air mi WNW of Parkman, ca 12 air mi NW of Dayton.  Elev. 5000 ft.
T58N R88W S27 NE1/4.  44.9758 N, 107.47056 W; uncertainty 1 mi..  
Brushy slope. Phenology: vegetative only. 

B. E. Nelson, 3858.  7/16/1979. 		RM 331329	Barcode: RM0215584
_________________________________________________________________________

166.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Washakie County: Big Horn Mountains: near the mouth of Tensleep Canyon, ca 5 air mi NE of Ten Sleep.  Elev. 4900 ft.
T47N R87W S6 SW1/4.  44.07028 N, 107.35861 W; uncertainty 1 mi..  
Brushy bottom of canyon and along the creek. Phenology: flowering. 

B. E. Nelson, 5183.  6/6/1980. 		RM 346806	Barcode: RM0215554
_________________________________________________________________________

167.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Fremont County: Big Horn Mountains: along Cottonwood Creek on the Lost Cabin-Nowood Road, ca 10.5 air mi N of Lost Cabin, ca 49.5 air mi NE of Riverton.  Elev. 6200 ft.
T40N R90W S13.  43.4364 N, 107.5819 W; uncertainty 1 mi..  
Sandstone outcrops. Phenology: vegetative only. 

B. E. Nelson, 5746.  7/7/1980. 		RM 347366	Barcode: RM0215588
_________________________________________________________________________

168.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Johnson County: Big Horn Mountains: in the canyon along the North Fork Crazy Woman Creek, ca 13.5 air mi SW of Buffalo.  Elev. 7000 ft.
T49N R83W S29.  44.1864 N, 106.8717 W; uncertainty 1 mi..  
Along the creek. Phenology: fruiting. 

B. E. Nelson, 6856.  8/6/1980. 		RM 347367	Barcode: RM0215591
_________________________________________________________________________

169.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Washakie County: Big Horn Mountains: along Nowood River at the foot of Mahogany Butte, ca 27 air mi S of Ten Sleep, ca 9.5 air mi SSW of Big Trails.  Elev. 5000 ft.
T43N R88W S35.  43.6506 N, 107.3811 W; uncertainty 1 mi..  
River bank. Phenology: vegetative only. 

B. E. Nelson, 8269.  7/17/1981. 		RM 347368	Barcode: RM0215587
_________________________________________________________________________

170.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Powder River Basin: ca 12 air mi WSW of Midwest.  Elev. 5400 ft.
T40N R80W S31 SE1/4.  43.39 N, 106.4933 W; uncertainty 1 mi..  
In sandstone crevices on lower slope of southeast-facing ridge. Phenology: fruiting. 

Keith H. Dueholm, 11968.  6/15/1985. 		RM 523710	Barcode: RM0215597
     with Brian Naze
_________________________________________________________________________

171.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: ca 3 air mi SSW of Dayton.  Elev. 4400 ft.
T56N R87W S13.  44.8289 N, 107.2928 W; uncertainty 1 mi..  
Ridge with sandy lower slopes and stream bottom, Gypsum springs and Chugwater formations. Phenology: fruiting. 

Ronald L. Hartman, 10617.  8/3/1979. 		RM 331328	Barcode: RM0215598
_________________________________________________________________________

172.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Powder River Basin: Chicken Creek Divide, 2.5 mi N of Spotted Horse.  Elev. 4200 ft.
T55N R75W S13.  44.7458 N, 105.8275 W; uncertainty 1 mi..  
Ridge, slopes, badly eroded valleys, and plains; moist rocky ravine. Phenology: buds. 

Ronald L. Hartman, 6038.  6/5/1978. 		RM 322312	Barcode: RM0215600
     with Keith Dueholm
_________________________________________________________________________

173.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 11.5 air mi NNE of Weston.  Elev. 3800 ft.
T55N R70W S2.  44.77917 N, 105.2383 W; uncertainty 1 mi..  
Open slopes. Phenology: flowering & fruiting. 

Ronald L. Hartman, 6961.  6/22/1978. 		RM 322313	Barcode: RM0215599
     with Keith Dueholm and Mary Alice Sanguinetti
_________________________________________________________________________

174.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: Bighorn National Forest: Little Bighorn River Canyon, ca 16 air mi W of Parkman.  Elev. 5000-5400 ft.
T58N R89W S30.  44.9758 N, 107.6533 W; uncertainty 1 mi..  
Shaded limestone area along river. Phenology: flowering. 

Ronald L. Hartman, 9531.  6/26/1979. 		RM 347364	Barcode: RM0215595
     with Ann Odasz
_________________________________________________________________________

175.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: at the Oregon Trail Historical Site on the Emigrant Trail, across the North Platte River from Guernsey.  Elev. 4320-4400 ft.
T26N R66W S2.  42.2558 N, 104.7428 W.  
Thickets along overflow channel. Phenology: vegetative only. 

B. E. Nelson, 24832.  5/19/1993. 		RM 599806	Barcode: RM0215544
_________________________________________________________________________

176.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Wyo Hwy 270 just W of intersection with Wyo Hwy 272, ca 2 air mi NE of Lance Creek; ca 22.5 air mi NNW of Lusk.  Elev. 4500-4640 ft.
T36N R65W S36.  43.0524 N, 104.6152 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
At base of ledge and in cracks of conglomerate. Phenology: vegetative only. 

B. E. Nelson, 25009.  5/20/1993. 		RM 599805	Barcode: RM0215548
_________________________________________________________________________

177.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: Wildcat Hills: between the heads of Willow and Muskrat creeks, ca 43 air mi NNW of Torrington.  Elev. 5680-5860 ft.
T30N R65W S12.  42.59 N, 104.6065 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
On sandstone ledges, low cliffs, and adjacent slope. Phenology: buds. 

B. E. Nelson, 25278.  5/26/1993. 		RM 599804	Barcode: RM0215552
_________________________________________________________________________

178.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: at the head of Webb Canyon on Wyo Hwy 270, ca 4.5 air mi N of Hartville; ca 8.5 air mi N of Guernsey.  Elev. 5200-5460 ft.
T28N R65W S19.  42.3847 N, 104.7047 W.  
In cracks of rocks in drainage channel. Phenology: vegetative only. 

B. E. Nelson, 25348.  5/27/1993. 		RM 599803	Barcode: RM0215543
_________________________________________________________________________

179.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Goshen Hole Rim: ca 13.5 air mi N of Chugwater; ca 12 air mi SE of Wheatland.  Elev. 5000-5160 ft.
T23N R66W S21.  41.9517 N, 104.7789 W.  
Rough breaks with conglomerates and cobblestones at upper levels and mudstones and soft sandstones below. Phenology: buds. 

B. E. Nelson, 25533.  5/30/1993. 		RM 599802	Barcode: RM0215545
_________________________________________________________________________

180.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: above Horse Creek just N of Laramie County, ca 12 air mi SW of La Grange; ca 36 air mi SSW of Torrington.  Elev. 5100-5200 ft.
T19N R63W S36.  41.5664 N, 104.3731 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Brushy and wooded bottom and lower slopes of drainage in rough breaks. Phenology: flowering. 

B. E. Nelson, 25573.  6/13/1993. 		RM 599801
_________________________________________________________________________

181.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole Rim: northwest end of Bear Mountain, ca 7 air mi SSW of Hawk Springs; ca 27 air mi SSW of Torrington.  Elev. 5000-5240 ft.
T20N R62W S21.  41.692 N, 104.3139 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Thickets and in draw on steep north slope. Phenology: flowering. 

B. E. Nelson, 25717.  6/14/1993. 		RM 599800	Barcode: RM0215555
_________________________________________________________________________

182.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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.  
Thickets on steep rocky slopes on the river bank. Phenology: flowering. 

B. E. Nelson, 27612.  7/26/1993. 		RM 599799	Barcode: RM0215541
_________________________________________________________________________

183.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: between Whalen Canyon or County Road 202 and the head of Sparks Canyon, ca 1.5-2.2 air mi ESE of Hartville; ca 4.5 air mi NE of Guernsey.  Elev. 4700-4950 ft.
T27N R65W S8 SW1/4; also SE1/4 S7.  42.3281 N, 104.6844 W.  
Banks and bottom of gully with scattered junipers. Phenology: vegetative only. 

B. E. Nelson, 28077.  8/2/1993. 		RM 599798	Barcode: RM0215540
_________________________________________________________________________

184.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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!.  
On and at the base of rust-colored cliffs. Phenology: vegetative only. 

B. E. Nelson, 28098.  8/2/1993. 		RM 599797	Barcode: RM0215551
_________________________________________________________________________

185.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Laramie County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Horse Creek at I-25 crossing ca 0.5 mi S of Nimmo Road, ca 23 air mi N of Cheyenne.  Elev. 5850-6000 ft.
T17N R67W S9 NE1/4.  41.46091 N, 104.8893 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Dry flats and benches along the creek. Phenology: vegetative only. 

B. E. Nelson, 28409.  8/17/1993. 		RM 599796	Barcode: RM0215546
_________________________________________________________________________

186.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Bear Creek just SSW of Bear Creek Church on County Road 153, ca 16.3 air mi W of La Grange, ca 34 air mi SSW of Torrington.  Elev. 4940-4960 ft.
T19N R63W S7 NW1/4.  41.6322 N, 104.4776 W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!.  
At the base of north-facing bluffs. Phenology: vegetative only. 

B. E. Nelson, 28662.  8/17/1993. 		RM 599795	Barcode: RM0215553
_________________________________________________________________________

187.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Morad Park on the North Platte River on the west end of Casper.  Elev. 5120 ft.
T33N R79W S18 SW1/4.  42.8253 N, 106.3647 W.  
Thickets and dense stands of Russian olive, boxelder, cottonwood, and willow. Phenology: fruiting. 

B. E. Nelson, 29172.  8/25/1993. 		RM 599794	Barcode: RM0215558
_________________________________________________________________________

188.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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!.  
Marshy creek bottom with flowing water. Phenology: vegetative only. 

B. E. Nelson, 29403.  8/29/1993. 		RM 599793	Barcode: RM0215549
_________________________________________________________________________

189.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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, 29576.  8/31/1993. 		RM 599792	Barcode: RM0215550
_________________________________________________________________________

190.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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: vegetative only. 

B. E. Nelson, 29659.  8/31/1993. 		RM 599791	Barcode: RM0215556
_________________________________________________________________________

191.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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!.  
Sand bars, mud flats, and river bank. Phenology: vegetative only. 

B. E. Nelson, 29821.  9/27/1993. 		RM 599790	Barcode: RM0215557
_________________________________________________________________________

192.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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!.  
Steep slopes and ledges of small canyon. Phenology: vegetative only. 

B. E. Nelson, 29940.  9/29/1993. 		RM 599789	Barcode: RM0215547
_________________________________________________________________________

193.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: just N of Wendover in Wendover Canyon along the North Platte River, ca 8 air mi NW of Guernsey.  Elev. 4440-4500 ft.
T27N R67W S10 NE1/4.  42.3289 N, 104.8813 W.  
Steep, rocky banks with thickets between the river and the railroad tracks. Phenology: fruiting. 

B. E. Nelson, 30054.  10/1/1993. 		RM 599788	Barcode: RM0215542
_________________________________________________________________________

194.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Three Buttes Creek ca 1.5 air mi N of Cottonwood River, ca 18 air mi N of Poder River, ca 46 air mi NW of Casper.  Elev. 5900-5960 ft.
T38N R85W S2 SE1/4.  43.2932 N, 107.0154 W.  
On ledges of sandstone cliffs. Phenology: vegetative only. 

B. E. Nelson, 31727.  6/19/1994. 		RM 663718	Barcode: RM0215615
_________________________________________________________________________

195.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: along the Laramie River ca 0.5 mi E of the old fort, ca 1.7 air mi SW of Fort Laramie (town); ca 21 air mi NW of Torrington.  Elev. 4230 ft.
T26N R64W S28 N1/2.  42.2025 N, 104.5473 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
Cottonwood woodland in the river bottom. Phenology: vegetative only. 

B. E. Nelson, 32036.  6/23/1994. 		RM 663717	Barcode: RM0215614
     with David Reilly
_________________________________________________________________________

196.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Bear Creek just W of the mouth of Dater Creek and ca 4 air mi S of Castle Rocks, ca 11 air mi W of La Grange; ca 30 air mi SSW of Torrington.  Elev. 4780 ft.
T20N R63W S36 SE1/4; also T19N R63W S1 NE1/4.  41.6519 N, 104.3686 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Brushy, with scattered trees in stream bottom adjacent to natural hay fields. Phenology: vegetative only. 

B. E. Nelson, 33543.  8/4/1994. 		RM 663716	Barcode: RM0215613
     with Tim Chumley and Robbin Romberg
_________________________________________________________________________

197.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: along the Laramie River W of the fort ca 2.5 air mi WSW of Fort Laramie (town); ca 21.5 air mi WNW of Torrington.  Elev. 4230 ft.
T26N R64W S29 NE1/4.  42.2025 N, 104.5608 W; NAD 83, uncertainty 0.25 mi., Nat. Geog. TOPO!.  
Woodland on the old flood plain. Phenology: vegetative only. 

B. E. Nelson, 33595.  8/8/1994. 		RM 663715	Barcode: RM0215612
     with David Reilly
_________________________________________________________________________

198.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: below the Fort Laramie Canal ca 2.5 air mi WSW of Fort Laramie (town), ca 20.5 air mi WNW of Torrington.  Elev. 4240-4260 ft.
T26N R64W S28.  42.1988 N, 104.5472 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
Meadows and banks adjacent to a slough. Phenology: vegetative only. 

B. E. Nelson, 33632.  8/8/1994. 		RM 663714	Barcode: RM0215611
_________________________________________________________________________

199.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Goshen Hole Rim: Mers Hill, ca 10 air mi E of Slater.  Elev. 4700-4950 ft.
T22N R65W S13 W1/2; and also E1/2 S14.  41.8789 N, 104.615 W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!.  
Sandstone outcrops and sandy slopes. Phenology: fruiting. 

Ronald L. Hartman, 40789.  7/11/1993. 		RM 599787	Barcode: RM0215596
_________________________________________________________________________

200.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountains: east side of Norgrain Hill, ca 6 air mi NE of Aladdin, ca 24.5 air mi NE of Sundance.  Elev. 3500 ft.
T54N R60W S5.  44.70111 N, 104.0778 W; uncertainty 1 mi..  
Bottom of canyon with oak-ash and north-facing slopes with oak-ponderosa pine. Phenology: vegetative only. 

B. E. Nelson, 11731.  9/12/1984. 		RM 371089	Barcode: RM0215580
_________________________________________________________________________

201.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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..  
Canyon bottom with oak, elm, hawthorn. Phenology: fruiting. 

B. E. Nelson, 11887.  9/13/1984. 		RM 371090	Barcode: RM0215579
_________________________________________________________________________

202.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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..  
Slopes in oak forest. Phenology: fruiting. 

B. E. Nelson, 11946.  9/16/1984. 		RM 371091	Barcode: RM0215578
_________________________________________________________________________

203.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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. 4700 ft.
T55N R63W S2.  44.7847 N, 104.3886 W; uncertainty 1 mi..  
North-facing slope with paper birch. Phenology: vegetative only. 

B. E. Nelson, 12177.  9/20/1984. 		RM 371092	Barcode: RM0215583
_________________________________________________________________________

204.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Weston County: Black Hills: Elk Mountains: at the South Dakota state line, ca 14 air mi SE of Newcastle.  Elev. 4900 ft.
T43N R60W S22.  43.6911 N, 104.0503 W; uncertainty 1 mi..  
Ponderosa pine slopes and small grassy openings. Phenology: vegetative only. 

B. E. Nelson, 8784.  7/7/1982. 		RM 371087	Barcode: RM0215582
_________________________________________________________________________

205.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Weston County: Black Hills: Elk Mountains: at the South Dakota state line, ca 14 air mi SE of Newcastle.  Elev. 4900 ft.
T43N R60W S22.  43.6911 N, 104.0503 W; uncertainty 1 mi..  
Ponderosa pine slopes and small grassy openings. 

B. E. Nelson, 8785.  7/7/1982. 		RM 
_________________________________________________________________________

206.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountains: Oak Creek drainage and ridge between Oak and Alum creeks, ca 6.5 air mi NNW of Aladdin; ca 23 air mi NNE of Sundance.  Elev. 3800 ft.
T55N R62W S36.  44.7158 N, 104.245 W; uncertainty 1 mi..  
Lower shaded slopes of draw. Phenology: vegetative only. 

B. E. Nelson, 8889.  7/9/1982. 		RM 371088	Barcode: RM0215581
_________________________________________________________________________

207.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: 8 mi NW of Hulett.  Elev. 5100 ft.
T55N R65W S17.  44.7486 N, 104.6946 W; uncertainty 1 mi..  
Canyons. Phenology: flowering. 

Gerald B. Ownbey, 556.  6/14/1940. 		RM 183886	Barcode: RM0215616
_________________________________________________________________________

208.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountain, upper Beaverdam Creek drainage; ca 4 air mi NE of Alva.  Elev. 4500 ft.
T55N R63W S26 W1/2.  44.7272 N, 104.3886 W; uncertainty 1 mi..  
Pine-oak forest. Phenology: buds. 

Hollis Marriott, 3019.  6/14/1983. 		RM 371074	Barcode: RM0215574
_________________________________________________________________________

209.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountain: divide W of Alva on Wyo Hwy 24.  Elev. 4300 ft.
T54N R64W S1 NE1/4.  44.6969 N, 104.4875 W; uncertainty 1 mi..  
Deciduous thicket in draw. Phenology: buds. 

Hollis Marriott, 3051.  6/15/1983. 		RM 371075	Barcode: RM0215573
_________________________________________________________________________

210.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: tributary to Road Creek off The Bank Land, (Graham Ranch), ca 13 air mi W of Sundance.  Elev. 4500-4600 ft.
T51N R65W S9.  44.42 N, 104.6689 W; uncertainty 1 mi..  
Pine-juniper woodland; southwest-facing slopes and ridge with sandstone rimrock and boulders. Phenology: vegetative only. 

Hollis Marriott, 3420.  6/23/1983. 		RM 371076	Barcode: RM0215572
_________________________________________________________________________

211.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: headwaters of Calvin Creek off Coal Divide, ca 7 air mi WSW of Sundance.  Elev. 5000 ft.
T51N R64W S35 NE1/4.  44.3653 N, 104.5083 W; uncertainty 1 mi..  
Grassland; south, east, and northeast-facing slopes. Phenology: vegetative only. 

Hollis Marriott, 3552.  6/24/1983. 		RM 371077	Barcode: RM0215571
_________________________________________________________________________

212.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Dugout Gulch near confluence with Sand Creek, ca 4.7 air mi SSW of Beulah.  Elev. 3800 ft.
T52N R61W S24 SE1/4.  44.4803 N, 104.12306 W; uncertainty 1 mi..  
Deciduous woods along creek. Phenology: vegetative only. 

Hollis Marriott, 3609.  6/27/1983. 		RM 371078	Barcode: RM0215570
     with Bertha Gillam and Sherry Bashor
_________________________________________________________________________

213.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Las Animas County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Park Plateau: Spanish Peaks Wildlife Area: County Road 41.7 SW of Aguila.  Elev. 7600 ft.
T32S R67W S11 South1/4; also N1/2 S14.  37.2728 N, 104.8564 W.  
Ponderosa pine and Quercus gambellii. 

Brian Elliott, 1886.  6/16/1998. 		RM 829411
_________________________________________________________________________

214.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Miller Creek, Garman Ranch; ca 9.3 air mi SSE of Devils Tower.  Elev. 4400-4600 ft.
T52N R65W S23 SE1/4; and SW1/4 S24.  44.47639 N, 104.6328 W; uncertainty 1 mi..  
Pine ridge with grassland understory. Phenology: vegetative only. 

Hollis Marriott, 4602.  7/14/1983. 		RM 371079	Barcode: RM0215569
_________________________________________________________________________

215.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: U.S. Hwy 14 near Thorn Divide, ca 1 air mi S of Carlile.  Elev. 4300 ft.
T52N R66W S20 SE1/4; also NE1/4 S29.  44.47639 N, 104.8117 W; uncertainty 1 mi..  
Roadside. Phenology: fruiting. 

Hollis Marriott, 4809.  7/21/1983. 		RM 371080	Barcode: RM0215568
_________________________________________________________________________

216.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Keyhole Reservoir, south side W of Coulter Bay, ca 10 air mi NE of Moorcroft.  Elev. 4100 ft.
T51N R66W S32 NE1/4.  44.3622 N, 104.81 W; uncertainty 1 mi..  
Pine forest above sandstone cliffs. Phenology: fruiting. 

Hollis Marriott, 4879.  7/21/1983. 		RM 371096	Barcode: RM0215575
_________________________________________________________________________

217.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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 S30 N1/2.  44.7253 N, 104.7057 W.  
Grassland. Phenology: fruiting. 

Hollis Marriott, 5373.  8/2/1983. 		RM 371081	Barcode: RM0215567
_________________________________________________________________________

218.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Weston County: Black Hills: west side of ridge S of Elk Mountain (USFS Road 818) near Mix Spring, ca 13.5 air mi SE of Newcastle.  Elev. 4800 ft.
T43N R60W S21; also S27, 28.  43.6911 N, 104.0705 W; uncertainty 2 mi..  
Pine forest on rocky soil. Phenology: flowering & fruiting. 

Hollis Marriott, 7171.  6/26/1984. 		RM 371082	Barcode: RM0215566
_________________________________________________________________________

219.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Missouri Buttes, highest butte.  Elev. 5100 ft.
T54N R66W S33.  44.62139 N, 104.7889 W; uncertainty 1 mi..  
Lower north slope, among talus. Phenology: vegetative only. 

Hollis Marriott, 7828.  7/9/1984. 		RM 371083	Barcode: RM0215565
_________________________________________________________________________

220.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: south end of Williams Divide near confluence of Buckley Canyon and Cold Springs Creek (Moskee Area), ca 9 air mi ESE of Sundance.  Elev. 5200 ft.
T50N R61W S5.  44.34917 N, 104.2025 W; uncertainty 1 mi..  
Pine forest with many openings. Phenology: vegetative only. 

Hollis Marriott, 7885.  7/11/1984. 		RM 371084	Barcode: RM0215564
_________________________________________________________________________

221.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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..  
Draw with pines and junipers, on sandy-rocky soil. Phenology: fruiting. 

Hollis Marriott, 8381.  8/2/1984. 		RM 371085	Barcode: RM0215563
_________________________________________________________________________

222.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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..  
Aspen woods in canyon bottom with sandstone boulders and outcrops. Phenology: fruiting. 

Hollis Marriott, 8790.  8/8/1984. 		RM 371086	Barcode: RM0215576
     with Dennis Horning
_________________________________________________________________________

223.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Fremont County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: over BLM boundary on U.S. Hwy 50, W of Parkdale.  Elev. 6000 ft.
T18S R72W S14 SW1/4.  38.4832 N, 105.4117 W.  
Riparian and pinyon-juniper. 

Brian Elliott, 2439.  6/22/1998. 		RM 829410
_________________________________________________________________________

224.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Devils Tower National Monument: boulder field along west base of tower.  Elev. 4300-4500 ft.
T53N R65W S7 SW1/2.  44.59306 N, 104.71 W; uncertainty 1 mi..  
Boulder field with scattered ponderosa pine. Phenology: fruiting. 

Ronald L. Hartman, 13732.  7/19/1981. 		RM 371093	Barcode: RM0215592
     with Hollis Marriot
_________________________________________________________________________

225.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: ca 3 air mi NNE of Aladdin.  Elev. 3600 ft.
T54N R61W S9; also S10 and S15.  44.6864 N, 104.1794 W; uncertainty 3 mi..  
Prairie, wooded stream bottom, and sandstone outcrops; wooded slope. Phenology: vegetative only. 

Ronald L. Hartman, 16275.  7/15/1983. 		RM 371094	Barcode: RM0215594
_________________________________________________________________________

226.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills: Boundary Gulch, ca 6 air mi S of Beulah.  Elev. 4300 ft.
T52N R60W S28.  44.4661 N, 104.0622 W; uncertainty 1 mi..  
Moist stream bottom with Pinus ponderosa dominated sandy slopes; partly open snady slope. Phenology: flowering. 

Ronald L. Hartman, 17773.  7/11/1984. 		RM 371095	Barcode: RM0215593
_________________________________________________________________________

227.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carbon County: Bighorn Basin: along a tributary of South Fork Bridger Creek just W of Pryor Mountain Road, ca 8 air mi SE of Bridger.  Elev. 4140-4340 ft.
T7S R24E S20 SW1/4.  45.207 N, 108.8155 W; uncertainty 0.5 mi., GPS reading.  
Along stream through redbeds and adjacent wet to dry meadows dominated by Glycyrrhiza. Phenology: fruiting. 

B. E. Nelson, 76400.  8/15/2008. 		RM 
_________________________________________________________________________

228.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Baca County: Comanche National Grassland: Ute Canyon, ca 0.5 mi W of County Road 28, ca 5.5-6 air mi S of Campo.  Elev. 4150-4180 ft.
T35S R46W S3 W1/2.  37.0182 N, 102.5902 W; GPS Reading.  
Shallow valley with scattered sandstone cliffs. Phenology: vegetative only. 

B. E. Nelson, 72417.  6/21/2007. 		RM 
     with Bernadette Kuhn
_________________________________________________________________________

229.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Baca County: Comanche National Grassland: Cave Spring and below just off Holt Canyon, just N of Oklahoma, ca 13 air mi SW of Campo.  Elev. 4250 ft.
T35S R48W S13 NW1/4.  37.0005 N, 102.7748 W; GPS Reading.  
Riparian area in canyon bottom. Phenology: vegetative only. 

B. E. Nelson, 72585.  6/24/2007. 		RM 
     with Bernadette Kuhn
_________________________________________________________________________

230.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Baca County: Comanche National Grassland: Holt Canyon, ca 28.5 air mi SW of Springfield.  Elev. 4253-4440 ft.
T35S R48W S12 NW1/4.  37.0141 N, 102.7736 W to 37.0114 N, 102.776 W to 37.0149 N, 102.7721 W; GPS Reading.  
With scattered Juniperus monosperma; canyon walls with Selaginella and Cheilanthes. Phenology: vegetative only. 

Bernadette Kuhn, 1507.  6/21/2007. 		RM 
     with B. E. Nelson
_________________________________________________________________________

231.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Baca County: Comanche National Grassland: Picture Canyon, ca 28.5 air mi SSW of Springfield.  Elev. 4257 ft.
T35S R47W S7.  37.0084 N, 102.7465 W; NAD 83, , GPS Reading.  
Along creek and sandstone canyon walls. Phenology: vegetative only. 

Bernadette Kuhn, 5788.  6/25/2008. 		RM 
     with Cali Hemenway
_________________________________________________________________________

232.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: small rise on north side of Van Bremmer Creek 0.3 air mi SW of junction with Vermejo River; 3.7 air mi SE of Colfax.  Elev. 6074 ft.
36 33' 12.9" N, 104 41' 49.2" W; WGS 84, uncertainty 3 m., GPS reading.  
Small, rounded, eroding shale slope in short-grass prairie with sparse herbaceous cover. Low shrub-like plants forming loose patch on shale slope. Phenology: vegetative only. 

Ben Legler, 6090.  7/16/2007. 		RM 840962	Barcode: RM0025918
_________________________________________________________________________

233.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: 0.4 air mi SE of junction of Lookout Canyon and Cerrososo Canyon; 18 air mi NNW of Cimarron.  Elev. 8052 ft.
36 45' 53.5" N, 105 0' 36.8" W; WGS 84, uncertainty 3 m., GPS reading.  
Recently burned Pinus ponderosa forest, with numerous standing dead trees and widely scattered live trees; understory of scattered sandstone rock outcrops and sandy soil, with grasses, Heterotheca villosa, Erigeron. Single patch in crevice of rock outcrop. Phenology: vegetative only. 

Ben Legler, 6455.  7/23/2007. 		RM 840961	Barcode: RM0025917
_________________________________________________________________________

234.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: slope on north side of a cattle watering pond in headwaters of Caliente Canyon, 7.2 air mi ENE of Casa Grande.  Elev. 8091 ft.
36 55' 30" N, 104 51' 22.6" W; WGS 84, uncertainty 5 m., GPS reading.  
Steep rocky south facing slope with shrubby Quercus ×undulata, scattered Pinus ponderosa, sparse herbaceous cover. Uncommon around rocky areas. Phenology: vegetative only. 

Ben Legler, 6849.  7/31/2007. 		RM 840960	Barcode: RM0025916
_________________________________________________________________________

235.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Las Animas County: Vermejo Park Ranch: small side canyon off south side of Joe Baker Canyon 1/2 air mi upstream from (southeast of) junction with Long Canyon; 14.9 air mi SW of Trinidad; on south side of stream channel.  Elev. 7137 ft.
36.996387 N, 104.693069 W; WGS 84, GPS reading.  
Narrow rocky canyon, dry streambed; with Quercus gambelii, Prunus virginiana, Roninia neomexicana; surrounded by Pseubotsuga menziesii forest. Small plants in loose soil around rocks. Specimen GPS: 36.996349, -104.693115. Phenology: vegetative only. 

Ben Legler, 8124.  5/26/2008. 		RM 840959	Barcode: RM0025915
_________________________________________________________________________

236.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: in Jones Canyon 2.4 air mi NW of its junction with the Canadian River; 11 air mi WNW of Raton.  Elev. 7301 ft.
36.944721 N, 104.627655 W; WGS 84, GPS reading.  
Edge of grassy flats adjacent to small stand of Populus tremuloides, with Quercus gambelii, Robinia neomexicana, Iris missouriensis, Taraxacum. Frequent under Quercus. Photographed. Specimen GPS: 36.944576, -104.62793. Phenology: flowering. 

Ben Legler, 8341.  6/2/2008. 		RM 840958	Barcode: RM0025914
_________________________________________________________________________

237.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: in upper part of East Fork Chimney Canyon 7.3 air mi E of Vermejo Park and 1.7 air mi SW of NM Hwy 555.  Elev. 7964 ft.
36.899052 N, 104.848976 W; WGS 84, GPS reading.  
Dry canyon bottom, with open grassy areas, adjacent forest of Pseudotsuga menziesii and Pinus ponderosa on north-facing slope, and Quercus thickets on south-facing slope. Occasional among rocks. Photographed. Specimen GPS: 36.89592, -104.841064. Phenology: vegetative only. 

Ben Legler, 8414.  6/4/2008. 		RM 840957	Barcode: RM0025913
_________________________________________________________________________

238.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: in lower part of Prairie Crow Canyon 1.0 air mi W of Koehler.  Elev. 6688 ft.
36.741817 N, 104.640839 W; WGS 84, GPS reading.  
Dry, east facing rocky slope dominated by Quercus grisea and Quercus ×undulata, with Q. gambelii at base along dry stream channel. Flowers pale green; occasional under Quercus gambelii. Specimen GPS: 36.741516, -104.646797. Phenology: flowering. 

Ben Legler, 8463.  6/5/2008. 		RM 840956	Barcode: RM0025912
_________________________________________________________________________

239.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: at base of The Wall on north side of Leandro Creek.  Elev. 9128 ft.
36.886955 N, 105.181168 W; WGS 84, GPS reading.  
Large overhanging cliff of andesite, with mineral deposits on lower part, southeast exposure, rimmed by talus and Quercus gambelii below, and forest of Pseudotsuga menziesii, Pinus aristata, and Pinus ponderosa above. Occasional in soil under shrubs at cliff base. Specimen GPS: 36.886391, -105.181526. Phenology: vegetative only. 

Ben Legler, 8587.  6/9/2008. 		RM 840955	Barcode: RM0025911
_________________________________________________________________________

240.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: slopes and small gulches on south side of Canadian River opposite mouth of Bog Canyon; 17.7 air mi W of Raton.  Elev. 7783 ft.
36.927364 N, 104.760674 W; WGS 84, GPS reading.  
Dry rocky gulches in partial shade of open Pinus ponderosa forest. Occasional among small outcrops along edges of gulches. Specimen GPS: 36.928204, -104.761993. Phenology: vegetative only. 

Ben Legler, 8732.  6/12/2008. 		RM 
_________________________________________________________________________

241.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: on north side of Tin Pan Canyon 1 air mi upstream from (W of) junction with Dillon Canyon; 6.4 air mi NW of Raton.  Elev. 7170 ft.
36.942287 N, 104.542206 W; WGS 84, GPS reading.  
Dry road cut at base of slope dominated by Quercus ×undulata, with Prunus virginiana, Apocynum androsaemifolium and Toxicodendron rydbergii. Low sub-shrubs, common on road cut. Specimen GPS: 36.942261, -104.542252. Phenology: flowering. 

Ben Legler, 9036.  6/24/2008. 		RM 840954	Barcode: RM0025910
_________________________________________________________________________

242.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Park County: Beartooth Mountains: Shoshone National Forest: Clarks Fork Canyon along Morrison Trail, ca 25-26 air mi NNW of Cody.  Elev. 4440-4600 ft.
T56N R104W S12 SE1/4; also NW1/4 S13.  44.8247 N, 109.3486 W to 44.8422 N, 109.3215 W; NAD 83, , GPS Reading.  
Gravelly soil with granite boulders. Phenology: flowering. 

B. E. Nelson, 71167.  5/24/2007. 		USFS 860684	Barcode: USFS0043815
     with Emily Elliott, Brian Elliott
_________________________________________________________________________

243.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Park County: Beartooth Mountains: ca 1/4-3/4 air mi N of Clarks Fork Yellowstone River; ca 26.5 air mi NNW of Cody.  Elev. 4520-5200 ft.
T56N R103W S5 W1/2.  44.8638 N, 109.298 W; WGS 84, , GPS reading.  
Red beds. Phenology: buds. 

Emily Elliott, 307.  5/24/2007. 		USFS 860835	Barcode: USFS0043818
     with B. E. Nelson and Brian Elliott
_________________________________________________________________________

244.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carbon County: Beartooth Mountains: Custer National Forest: along West Rosebud Creek, on the forest boundary, ca 20 air mi NW of Red Lodge.  Elev. 5960-6040 ft.
T6S R17E S28 NE1/4; also NW1/4 S27.  45.2891 N, 109.6291 W; WGS 84, , GPS reading.  
Wet slope also stream and pond banks. Phenology: flowering & fruiting. 

Emily Elliott, 657.  5/31/2007. 		USFS 864112	Barcode: USFS0044255
_________________________________________________________________________

245.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Stillwater County: Beartooth Mountains: along Mont Hwy 420, ca 3/4 mi N of Beehive, ca 31 air mi NW of Red Lodge.  Elev. 4680-5360 ft.
T4S R16E S14 N1/2.  45.4885 N, 109.718 W; WGS 84, , GPS Reading.  
Volcanic tuft (ash substrate) cliffs and surrounding slopes dominated by annual weedy forbs with very few trees, area recently burned. Phenology: flowering. 

Emily Elliott, 878.  6/4/2007. 		RM 938528	Barcode: RM0108431
     with Brian Elliott
_________________________________________________________________________

246.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Park County: Beartooth Mountains: Little Rock Creek, ca 3-4 air mi E of Deep Lake.  Elev. 5200-5800 ft.
T57N R103W S20 E1/2; also S21.  44.9018 N, 109.3023 W to 44.9018 N, 109.3278 W; NAD 83, uncertainty 1 mi., Nat. Geog. TOPO!.  
Rocky slopes and outcrops of sandstone (redbeds) and wet areas along creek. Phenology: flowering. 

Ronald L. Hartman, 54827.  6/15/1996. 		USFS 860834	Barcode: USFS0043817
_________________________________________________________________________

247.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Judith Basin County: Lewis and Clark National Forest: Blacktail Hills: Dry Wolf Creek, Forest Road 251, ca 8 air mi SW of Stanford.  Elev. 1527 m.
T10N R15E S13.  46.6285 N, 109.7755 W; NAD 83, uncertainty 1 mi., Nat. Geog. TOPO!.  
Limestone ridge with ponderosa pine, limber pine, and Douglas fir. Phenology: flowering. 

Ronald L. Hartman, 86862.  6/9/2008. 		RM 
     with Rick McNeill
_________________________________________________________________________

248.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Cascade County: Lewis and Clark National Forest: Little Belt Mountains: along Dry Creek, just E of Monarch.  Elev. 4623 ft.
T15N R7E S3.  47.0946 N, 110.8299 W; NAD 83, uncertainty 0.25 mi., GPS reading.  
Steam side with limestone bluffs. Phenology: fruiting. 

Ronald L. Hartman, 87422.  6/16/2008. 		RM 
     with Rick McNeill
_________________________________________________________________________

249.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Park County: Absaroka Range: Gallatin National Forest: near West Boulder River above West Boulder Meadows, ca 29 air mi SW of Big Timber.  Elev. 5760-6000 ft.
T4S R11E S2 SW1/4.  45.5149 N, 110.3408 W; uncertainty 0.5 mi..  
Dolomite cliffs and loose talus fields below. Phenology: fruiting. 

Emily Elliott, 6845.  8/3/2008. 		USFS 866990	Barcode: USFS0059218
     with Brian Elliott
_________________________________________________________________________

250.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Cascade County: Sluice Boxes State Monument: Little Belt Mountains: along trail, ca 0.6 air mi S of trailhead, west side of Belt Creek.  Elev. 1213 m.
T17N R6E S27.  47.2037 N, 110.9395 W; NAD 83, GPS reading.  
Riparian area at base of limestone cliff, talus. Phenology: fruiting. 

Rick McNeill, 4912.  6/22/2009. 		RM 
_________________________________________________________________________

251.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Las Animas County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Raton Mesa: I-25 just N of New Mexico on east side of highway.  Elev. 7700 ft.
36.9944 N, 104.4799 W.  
Oak-pinyon-juniper woodland. 

Ronald L. Hartman, 61517.  6/17/1998. 		RM 829409
_________________________________________________________________________

252.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Long Pines: on Exie Road (Forest Road 3119), above and along North Tie Creek, ca 10 air mi WNW of Camp Crook, SD.  Elev. 3560-3740 ft.
T3S R61E S10 SE1/4; also SW1/4 S11.  45.5866 N, 104.1743 W to 45.5843 N, 104.1711 W; NAD 83, , GPS reading.  
Thickets and bank of stream. Phenology: vegetative only. 

B. E. Nelson, 76716.  6/5/2009. 		USFS 884987	Barcode: USFS0053933
     with Hans Hallman
_________________________________________________________________________

253.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: on Forest Road 3102A ca 1-1.5 air mi SE of junction of Mont Hwy 323 and Prairie Dale Road, ca 8-8.5 air mi SE of Ekalaka.  Elev. 3380-3600 ft.
T1N R59E S29.  45.8202 N, 104.4159 W to 45.8135 N, 104.4154 W; NAD 83, , GPS reading.  
Steep ponderosa pine covered slopes with cliffs. Phenology: vegetative only. 

B. E. Nelson, 76900.  6/8/2009. 		USFS 884986	Barcode: USFS0053932
     with Hans Hallman
_________________________________________________________________________

254.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: from the top down to Window Rock, ca 16-16.5 air mi E of Buffalo.  Elev. 3180-3590 ft.
T19N R8E S36 W1/2.  45.5715 N, 103.2097 W to 45.5695 N, 103.2131 W; NAD 83, , GPS reading.  
Rocky upper slopes of outcrops and low cliffs with ponderosa pine. Phenology: flowering. 

B. E. Nelson, 76951.  6/9/2009. 		USFS 884985	Barcode: USFS0053931
     with Hans Hallman
_________________________________________________________________________

255.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: just N of SD Hwy 20, ca 0.5-1 air mi W of Reva Gap, ca 17.5 air mi E of Buffalo.  Elev. 3180-3280 ft.
T18N R8E S7 SW1/4.  45.5329 N, 103.1897 W; NAD 83, , GPS reading.  
Chokecherry thicket. Phenology: vegetative only. 

B. E. Nelson, 76980.  6/9/2009. 		USFS 884984	Barcode: USFS0053930
     with Hans Hallman
_________________________________________________________________________

256.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: ca 0.5 air mi W of SD Hwy 79 on South Divide Road (Forest Road 3148) in and along Deer Draw, ca 23 air mi SE of Buffalo.  Elev. 3350-3500 ft.
T16N R8E S5.  45.3784 N, 103.1734 W to 45.3784 N, 103.1774 W; NAD 83, , GPS reading.  
Bushy ponderosa pine forest on north-facing slope. Phenology: vegetative only. 

B. E. Nelson, 77029.  6/11/2009. 		USFS 885023	Barcode: USFS0053920
     with Hans Hallman
_________________________________________________________________________

257.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: Red Shale Campground and vicinity on U. S. Hwy 212 above East Fork Otter Creek, ca 6 air mi E of Ashland.  Elev. 3140-3240 ft.
T3S R45E S14 SW1/4.  45.571 N, 106.1467 W; NAD 83, , Nat. Geog. TOPO!.  
Draw in ponderosa pine woods. Phenology: flowering. 

B. E. Nelson, 77319.  6/17/2009. 		 	Barcode: USFS0050105
_________________________________________________________________________

258.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: vicinity of Cow Creek Camp/ Picnicground on Cow Creek ca 5.5 air mi W of Fort Howes Work Center, ca 25 air mi S Ashland.  Elev. 3850 ft.
T6S R45E S17 SE1/4.  45.3101 N, 106.2427 W; NAD 83, , GPS reading.  
Bushy valley bottom, stream bank, and base of ponderosa pine slope. Phenology: fruiting. 

B. E. Nelson, 78217.  7/25/2009. 		USFS 884982	Barcode: USFS0053928
_________________________________________________________________________

259.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: North Cave Hills: ca 0.5 air mi SE of Riley Pass, ca 18 air mi N of Buffalo.  Elev. 3290-3320 ft.
T22N R5E S26 SW1/4.  45.836 N, 103.471 W; NAD 83, , GPS reading.  
Among sandstone blocks just below the top of the cliff. Phenology: vegetative only. 

B. E. Nelson, 78559.  7/30/2009. 		USFS 884981	Barcode: USFS0053927
_________________________________________________________________________

260.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Long Pines: Wickham Gulch, in the vicinity of Wickham Spring Number 1, ca 5.5 air mi NW of Camp Crook, SD.  Elev. 3400-3600 ft.
T3S R62E S16 NE1/4.  45.5801 N, 104.0713 W; NAD 83, , GPS reading.  
Ponderosa pine-dominated upland slope. Phenology: flowering. 

Hans Hallman, 178.  6/12/2009. 		USFS 883209	Barcode: USFS0049195
_________________________________________________________________________

261.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: North Cave Hills: between Sawmill Canyon and Devils Canyon, ca 6.5 air mi WNW of Ludlow.  Elev. 3080-3360 ft.
T22N R5E S16 S1/4.  45.8588 N, 103.5033 W; NAD 83, , GPS reading.  
Upland ponderosa pine woodland. Phenology: flowering. 

Hans Hallman, 237.  6/13/2009. 		USFS 885026	Barcode: USFS0053854
_________________________________________________________________________

262.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: North Cave Hills: in draw and on mesa just N of Forest Road 123, ca 0.5 air mi W of Picnic Spring, ca 6.5 air mi WNW of Ludlow.  Elev. 3200-3340 ft.
T22N R5W S15 W1/2; also NE1/4 S16.  45.8728 N, 103.5037 W; NAD 83, , GPS reading.  
Mixed ponderosa pine and hardwood draw. Phenology: fruiting. 

Hans Hallman, 362.  6/13/2009. 		USFS 885025	Barcode: USFS0053855
_________________________________________________________________________

263.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: in and around Sawmill Gulch near Jackson Sawmill Spring, ca 1.5 air mi of Poker Jim Butte Lookout and ca 20.5 air mi SSW of Ashland.  Elev. 3840-4050 ft.
T6S R44E S20 NE1/4; also NW1/4 S21.  45.3091 N, 106.3627 W; NAD 83, , GPS reading.  
Sandy hillside above gulch. Phenology: fruiting. 

Hans Hallman, 729.  6/20/2009. 		USFS 885024	Barcode: USFS0053856
_________________________________________________________________________

264.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: King Mountain Hiking and Riding Area: in and around East Fork O' Dell Creek ca 2.5 air mi E of O' Dell Creek or Forest Road 4131, ca 12.5 air mi S of Ashland.  Elev. 3660-3820 ft.
T5S R44E S11 N1/2.  45.4219 N, 106.2651 W; NAD 83, , GPS reading.  
Partially burned ponderosa pine-dominated upland. Phenology: flowering. 

Hans Hallman, 825.  6/20/2009. 		USFS 885012	Barcode: USFS0053958
_________________________________________________________________________

265.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: in and around the head of Flasted Draw, 1.5-2 air mi SW of Red Hill and ca 3.5 air mi E of Ekalaka.  Elev. 3640-3700 ft.
T2N R58E S35 E1/2.  45.888 N, 104.4753 W; NAD 83, , GPS reading.  
Hardwood draw dominated by green ash and chokecherry. Phenology: flowering & fruiting. 

Hans Hallman, 1206.  6/25/2009. 		USFS 885011	Barcode: USFS0053957
_________________________________________________________________________

266.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: on top of and on southern slope of Home Creek Butte off of Suicide Pass Road spur or Forest Road 4777A, ca 4 air mi NW of Camps Pass and ca 16.5 air mi E of Ashland.  Elev. 4300-4400 ft.
T3S R47E S4 W1/2.  45.6027 N, 105.9351 W; NAD 83, , GPS reading.  
Upland woodland dominated by ponderosa pine and grasses; mostly shallow, rocky soils with some rock outcrops. Phenology: vegetative only. 

Hans Hallman, 1639.  7/5/2009. 		USFS 883210	Barcode: USFS0049196
_________________________________________________________________________

267.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: just S of Forest Road 4785, ca 0.5 air mi SW of Camps Pass and ca 19 air mi ESE of Ashland.  Elev. 3840-4000 ft.
T3S R47E S27 NE1/4.  45.5479 N, 105.9016 W; NAD 83, , GPS reading.  
Ponderosa pine and green ash-dominated draw. Phenology: vegetative only. 

Hans Hallman, 1697.  7/6/2009. 		USFS 885010	Barcode: USFS0053956
_________________________________________________________________________

268.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: in and around draws SE of junction of North Divide or Forest Road 3125 and Forest Road 3145 in the vicinity of Camp Spring, ca 4.5 air mi S of Reva Gap, ca 19 air mi ESE of Buffalo.  Elev. 3460-3580 ft.
T17N R8E S6.  45.4642 N, 103.191 W; NAD 83, , GPS reading.  
Draw dominated by green ash and aspen. Phenology: fruiting. 

Hans Hallman, 2264.  7/17/2009. 		USFS 883211	Barcode: USFS0049197
_________________________________________________________________________

269.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in and around Seymour Reservoir, ca 0.5 air mi N of Taylor Creek or Forest Road 4127, ca 7 air mi SE of Fort Howes and ca 27 air mi SSE of Ashland.  Elev. 3720-3800 ft.
T7S R47E S7 W1/4; also T7S R46E NE1/4 S12.  45.2465 N, 106.0316 W; NAD 83, , GPS reading.  
About reservoir. Phenology: fruiting. 

Hans Hallman, 2778.  7/23/2009. 		USFS 885009	Barcode: USFS0053955
_________________________________________________________________________

270.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: in the vicinity of Willard Gap off of Rimrock Trail or Forest Road 3150, ca 3 air mi ESE of Summit Pass on SD Hwy 79 and ca 26.5 air mi SE of Buffalo.  Elev. 3380-3480 ft.
T16N R8E S14 N1/2.  45.3493 N, 103.1066 W; NAD 83, , GPS reading.  
Near the rim of a cliff with scattered ponderosa pine, junipers, and grasses. Phenology: fruiting. 

Hans Hallman, 2912.  7/26/2009. 		USFS 885008	Barcode: USFS0053954
_________________________________________________________________________

271.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Long Pines: in the vicinity of Red Bluff Spring, just W of Forest Road 3117, ca 5 air mi SSW of Mill Iron and ca 16.5 air mi ESE of Ekalaka.  Elev. 3200-3300 ft.
T1S R61E S6 N1/2.  45.7857 N, 104.2355 W; NAD 83, , GPS reading.  
East-facing rocky slope with mix of ponderosa pine, green ash, and hardwood shrubs. Phenology: fruiting. 

Hans Hallman, 3006.  7/26/2009. 		USFS 885007	Barcode: USFS0053953
_________________________________________________________________________

272.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: just NW of Ekalaka Park off of Forest Road 3818A, ca 1/4 air mi N of Hidden Spring, ca 6.5 air mi SSE of Ekalaka.  Elev. 3900-4000 ft.
T1N R58E S33 N1/2.  45.8005 N, 104.5173 W; NAD 83, , GPS reading.  
Ponderosa pine-dominated upland. Phenology: fruiting. 

Hans Hallman, 3452.  7/30/2009. 		USFS 885006	Barcode: USFS0053952
_________________________________________________________________________

273.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: just NW of unnamed 4WD road ca 1.5 air mi SW of The Breaks Coulee, ca 15 air mi NE of Ashland.  Elev. 3100-3200 ft.
T1S R46E S6 SE1/4.  45.7772 N, 106.1018 W; NAD 83, , GPS reading.  
Ponderosa pine and grass-dominated draw. Phenology: fruiting. 

Hans Hallman, 3648.  8/2/2009. 		USFS 885005	Barcode: USFS0053951
_________________________________________________________________________

274.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: South Cave Hills: in and around Timber Canyon, between Forest roads 3113 and 3137, ca 11.5 air mi N of Buffalo.  Elev. 3340-3400 ft.
T21N R5E S30 SW1/4.  45.7479 N, 103.5604 W; NAD 83, , GPS reading.  
Green ash-dominated draw. Phenology: fruiting. 

Hans Hallman, 3757.  8/4/2009. 		USFS 885004	Barcode: USFS0053950
_________________________________________________________________________

275.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: South Cave Hills: in and around McKenzie Gulch, S of Forest Road 3113, ca 10 air mi N of Buffalo.  Elev. 3140-3240 ft.
T20N R5E S5.  45.7265 N, 103.5405 W; NAD 83, , GPS reading.  
Southwest-facing rocky, grass dominated slope. Phenology: fruiting. 

Hans Hallman, 3820.  8/4/2009. 		USFS 885003	Barcode: USFS0053949
_________________________________________________________________________

276.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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. 3780-3840 ft.
T5S R47E S9 SE1/4; also SW1/4 S10, NW1/4 S15, and NE1/4 S16.  45.4037 N, 105.9251 W; NAD 83, , GPS reading.  
Green ash-dominated draw. Phenology: fruiting. 

Hans Hallman, 4066.  8/13/2009. 		USFS 885002	Barcode: USFS0053948
_________________________________________________________________________

277.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: North Cave Hills: in a tributary of Schleichart Draw above Schleichart Draw Reservoir, W of Forest Road 3130, ca 17 air mi NNE of Buffalo.  Elev. 3400 ft.
T22N R5E S35.  45.831 N, 103.4707 W; NAD 83, , GPS reading.  
Grass and chokecherry-dominated east-facing slope with rock outcrops. Phenology: fruiting. 

Hans Hallman, 4271.  8/16/2009. 		USFS 885001	Barcode: USFS0053947
     with G. Gust
_________________________________________________________________________

278.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Long Pines: just W of Forest Road 3117, in and around unnamed pond in Spring Canyon, ca 16 air mi NW of Camp Crook, SD.  Elev. 3620-3720 ft.
T1S R61E S32 NE1/4.  45.7243 N, 104.2192 W; NAD 83, , GPS reading.  
Above margin of unnamed still-water pond. Phenology: fruiting. 

Hans Hallman, 4409.  8/16/2009. 		USFS 885000	Barcode: USFS0053946
     with G. Gust
_________________________________________________________________________

279.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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: fruiting. 

Hans Hallman, 4575.  8/18/2009. 		USFS 884999	Barcode: USFS0053945
     with G. Gust
_________________________________________________________________________

280.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: just off Opechee Park or Forest Road 3101, ca 0.5 road mi SE of private inholding border with Forest Service land, ca 4.5 air mi ESE of Ekalaka.  Elev. 3790-3880 ft.
T1N R58E S12 NW1/4.  45.8635 N, 104.4662 W; NAD 83, , GPS reading.  
Aspen and ponderosa pine-dominated draw. Phenology: fruiting. 

Hans Hallman, 4605.  8/19/2009. 		USFS 884998	Barcode: USFS0053944
     with G. Gust
_________________________________________________________________________

281.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: ca 1.5 road mi E of Rye.  Elev. 6400 ft.
T24S R67W S32 NE1/4.  37.9184 N, 104.9076 W.  
Roadside and road cut. 

Ronald L. Hartman, 63180.  8/13/1998. 		RM 829407
     with Craig Freeman
_________________________________________________________________________

282.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Crook County: Black Hills National Forest: ca 12.5 air mi W (265°) of Spearfish, SD, E of Sand Creek Road in the vicinity of Dugout Gulch; S of Dugout Creek.  Elev. 3996 ft.
T52N R60W S19 SW1/4 SW1/4.  zone 13N, 570666.22E, 4925292.87N; NAD 83, GPS reading.  
North-facing slope S of Dugout Creek: Betula papyrifera/Ostrya virginiana woodland. Survey ID: 10D002 Phenology: fruiting. 

Brian Elliott, 14882.  6/2/2010. 		RM 
_________________________________________________________________________

283.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., North Dakota, Richland County: Wahpeton.
Bank of slough. Phenology: vegetative only. 

H. F. Bergman, s.n..  7/9/1910. 		RM 154479
_________________________________________________________________________

284.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, no county County: 
Common. Phenology: vegetative only. 

S. A. Skinner, 2.  //. 		RM 61824
_________________________________________________________________________

285.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Kearney County: Minden.
Phenology: flowering & fruiting. 

Harry H. Cheeseman, s.n..  6/5/1913. 		RM 223002
_________________________________________________________________________

286.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Kearney County: Minden.
Phenology: flowering. 

Harry Hapeman, s.n..  6/3/1891. 		RM 223001
_________________________________________________________________________

287.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Sheridan County: Metcalf Public Hunting Grounds, 13 mi N of Hay Springs.  Elev. 3300 ft.
Open ridges and Pinus ponderosa forest. Common. Phenology: flowering. 

Elray S. Nixon, 53.  5/30/1964. 		RM 275501
_________________________________________________________________________

288.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, no county County: Nebraska National Forest.
Phenology: flowering. 

Theodore Krueger, s.n..  6/4/1914. 		USFS 512363
_________________________________________________________________________

289.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Nebraska, Brown County: Longpine.
Phenology: fruiting. 

J. M. Bates, s.n..  7/8/1899. 		RM 18351
_________________________________________________________________________

290.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Gallatin County: Gallatin National Forest: Rocky Canyon.  Elev. 5000 ft.
T2S R7E S30.  
With sage, oregon grape. Phenology: fruiting. 

Albert H. Nee, 672.  6/10/1928. 		USFS 512368
_________________________________________________________________________

291.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana: Helena National Forest: Bear Gulch.  Elev. 5000 ft.
T12N R2W.  
South slope; gravelly rocky soil; open ground with Apocynaceae, Symphoricarpos, Spirea. Phenology: flowering. 

Arthur Cramer, 59.  6/24/1924. 		USFS 512367
_________________________________________________________________________

292.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana: Sioux National Forest: Ekalaka Division.  Elev. 5700 ft.
North slope; with yellow pine, oregon grape; heavy shade. Common on all aspects and sites. Phenology: fruiting. 

H. R. Flint, 2.  7/2/1917. 		USFS 512365
_________________________________________________________________________

293.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana: Custer (formerly Sioux) National Forest: Long Pines Division.  Elev. 3800 ft.
Fresh, moist soil. Common. Phenology: fruiting. 

H. R. Flint, 40.  5/4/1917. 		USFS 512366
_________________________________________________________________________

294.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: E of Forest Road 4775, ca 1.5 air mi SE of East Fork Otter Creek Road, ca 2.5 air mi SSW of Holiday Campground, ca 13.5 air mi E of Ashland.  Elev. 3640-3900 ft.
T3S R46E S1 NW1/4; also S2 NE1/4.  45.6057 N, 106.0025 W; NAD 83, , GPS reading.  
Ponderosa pine-dominated forest with scattered rock outcrops and grass-dominated openings. Phenology: fruiting. 

Hans Hallman, 5212.  6/24/2010. 		USFS 884997	Barcode: USFS0053943
_________________________________________________________________________

295.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: just N of Forest Road 4410, ca 2 air mi E of Yager Butte, ca 17 air mi ESE of Ashland.  Elev. 3660-3800 ft.
T4S R47E S19 S1/4; also S30 N1/2.  45.4586 N, 105.9843 W; NAD 83, , GPS reading.  
In and around flowing-water hardwood draw with green ash, boxelder, chokecherry, snowberry, and Monarda. Phenology: fruiting. 

Hans Hallman, 5766.  7/4/2010. 		USFS 884996	Barcode: USFS0053942
_________________________________________________________________________

296.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in vicinity between Holiday Campground and SE to Sutton Spring, E of Forest Road 4777, ca 15 air mi ENE of Ashland.  Elev. 3940-4000 ft.
T2S R47E S19 SE1/4; also S30 NE1/4 and S29 NW1/4.  45.6376 N, 105.9735 W; NAD 83, , GPS reading.  
Ponderosa pine forest with dense groundcover of Berberis and Toxicodendron. Phenology: fruiting. 

Hans Hallman, 5803.  7/6/2010. 		USFS 884995	Barcode: USFS0053941
_________________________________________________________________________

297.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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. 4040-4140 ft.
T2S R48E S20 NW1/4; also S17 SW1/4.  45.6547 N, 105.8321 W; NAD 83, , GPS reading.  
Northeast-facing slope dominated by ponderosa pine and grasses with scattered rock outcrops. Phenology: fruiting. 

Hans Hallman, 6062.  7/12/2010. 		USFS 884994	Barcode: USFS0053940
_________________________________________________________________________

298.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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. 3780-3920 ft.
T2S R46E S25.  45.6334 N, 105.9905 W; NAD 83, , GPS reading.  
Dense ponderosa pine-dominated forest. Phenology: fruiting. 

Hans Hallman, 6154.  7/13/2010. 		USFS 884993	Barcode: USFS0053939
_________________________________________________________________________

299.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: just E of Forest Road 3814, ca 1 air mi ENE of Smith Well, ca 5.5 mi SSW of Ekalaka.  Elev. 3830-3900 ft.
T1N R58E S19 SW1/4; also S30 NW1/4.  45.816 N, 104.5674 W; NAD 83, , GPS reading.  
Moist draw dominated by quaking aspen. Phenology: fruiting. 

Hans Hallman, 6267.  7/15/2010. 		USFS 884992	Barcode: USFS0053938
_________________________________________________________________________

300.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Natrona County: Upper North Platte and Laramie River Drainages: Alcova Reservoir: Fremont Canyon at end of Lake Shore Drive, ca 4 air mi SW of Alcova townsite.  Elev. 5540 ft.
T29N R83W S4.  42.5112 N, 106.7867 W.  
Rocky canyon opening into reservoir. Phenology: vegetative only. 

Amy J. Roderick, 6727.  7/18/1998. 		RM 666238	Barcode: RM0215601
_________________________________________________________________________

301.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: in the vicinity of Road Draw Spring No. 2, SE of JB Pass, E of Forest Road 3148, ca 20 air mi SE of Buffalo.  Elev. 3420-3480 ft.
T17N R8E S25 W1/2.  45.4074 N, 103.214 W; NAD 83, , GPS reading.  
In vicinity of hardwood draw with green ash, boxelder, and chokecherry. Phenology: fruiting. 

Hans Hallman, 6639.  7/23/2010. 		USFS 884991	Barcode: USFS0053937
_________________________________________________________________________

302.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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: fruiting. 

Hans Hallman, 6819.  7/27/2010. 		USFS 884990	Barcode: USFS0053936
_________________________________________________________________________

303.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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. 3760-3840 ft.
T6S R46E S22 SE1/4.  45.2989 N, 106.0856 W; NAD 83, , GPS reading.  
Cornus and Toxicodendron-dominated draw with green ash. Phenology: fruiting. 

Hans Hallman, 6950.  7/28/2010. 		USFS 884989	Barcode: USFS0053935
_________________________________________________________________________

304.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

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, 7070.  7/30/2010. 		USFS 884988	Barcode: USFS0053934
_________________________________________________________________________

305.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Mesa County: In De Beque Canyon along the Colorado River at the southeast base of Beavertail Mountain, ca 7.5 air mi NE of Palisade.  Elev. 4800 ft.
T10S R98W S13 NE1/4; also SW1/4 S7 and NW1/4 S18.  39.1923 N, 108.2712 W; GPS reading.  
Base of sandstone cliffs along old highway in the canyon. Phenology: fruiting. 

B. E. Nelson, 79017.  5/2/2010. 		USFS 
     with Lori E. Brummer
_________________________________________________________________________

306.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Phillips County: Larb Hills (South): at the head of Telegraph Creek, ca 47 air mi S of Saco; ca 44 air mi SSE of Malta.  Elev. 2900-3100 ft.
T24N R33E S33 W1/2.  47.7983 N, 107.4928 W; NAD 83, GPS reading.  
Boxelder-chokecherry-buffaloberry-Rocky Mountain juniper-cottonwood thickets in the valley bottom and ravenes. Phenology: vegetative only. 

B. E. Nelson, 80667.  7/29/2010. 		RM 
_________________________________________________________________________

307.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Phillips County: Larb Hills (South): near the head of South Fork Shotgun Coulee ca 1 air mi N of Coal Mine Hill, ca 44-45 air mi S of Saco; ca 40 air mi SSE of Malta.  Elev. 3000-3180 ft.
T24N R33E S7 W1/2.  47.8508 N, 107.5327 W to 47.8563 N, 107.5343 W; NAD 83, GPS reading.  
Toxicodendron-Rhus-Acer-Symphoricarpos thickets in the bottoms. Phenology: vegetative only. 

B. E. Nelson, 80699.  7/29/2010. 		RM 
_________________________________________________________________________

308.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Phillips County: Ca 2-2.5 air mi E of Frenchman Creek and ca 0.5 mi S of Saskatchewan, ca 53 air mi NNE of Malta.  Elev. 2780-2940 ft.
T37N R34E S4 South1/2.  48.9924 N, 107.2585 W to 48.9894 N, 107.2545 W; NAD 83, GPS reading.  
Prunus thicket on north-facing slope. Phenology: vegetative only. 

B. E. Nelson, 80761.  7/31/2010. 		RM 
_________________________________________________________________________

309.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Valley County: Charles M. Russell National Wildlife Refuge: on Fourth Ridge, vicinity of Refuge Road 333, ca 2 air mi ESE of Berger Reservoir, ca 14 air mi SW of Fort Peck; ca 25 air mi S of Glasgow.  Elev. 2400-2650 ft.
T25N R39E S36 SW1/4; also S35 SE1/4.  47.8731 N, 106.6408 W; NAD 83, GPS reading.  
Beneath closed juniper thicket. Phenology: vegetative only. 

Joseph L. M. Charboneau, 2613.  7/31/2010. 		RM 
_________________________________________________________________________

310.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Phillips County: Matador Ranch: W of Stage Road (Mont Hwy 204), Little Warm Creek, ca 8 air mi WNW of Veseth Reservoir, ca 10 air mi ENE of Zortman; ca 35 air mi SW of Malta.  Elev. 2940-3050 ft.
T26N R26E S26 NE1/4.  47.9823 N, 108.3292 W; NAD 83, GPS reading.  
Partially wooded draw bottom. Phenology: vegetative only. 

Joseph L. M. Charboneau, 3065.  8/8/2010. 		RM 
_________________________________________________________________________

311.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Phillips County: Frenchman Creek, E of Turkey Track Road, ca 8 air mi E of Salsberg Reservoir, ca 28 air mi NNE of Saco; ca 45.5 air mi NE of Malta.  Elev. 2470-2740 ft.
T36N R34E S28 NE1/4.  48.8487 N, 107.2778 W to 48.8558 N, 107.2737 W; NAD 83, GPS reading.  
Swale and steep hillside with chokecherry and serviceberry. Phenology: vegetative only. 

Joseph L. M. Charboneau, 3455.  8/19/2010. 		RM 
_________________________________________________________________________

312.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Phillips County: Little Rocky Mountains: Beaver Creek, ca 1.5 air mi ENE of the intersection of the road from Camp Creek and the Beaver Creek Trail, ca 2 air mi E of Beaver Mountain, ca 3 air mi NNE of Zortman; ca 41 air mi SW of Malta.  Elev. 4070-4330 ft.
T26N R25E S34 SE1/4; also T25N R25E S3 NE1/4.  47.958 N, 108.4915 W to 47.9576 N, 108.4857 W to 47.962 N, 108.487 W; NAD 83, GPS reading.  
Draw bottom upslope. Phenology: vegetative only. 

Joseph L. M. Charboneau, 3549.  8/21/2010. 		RM 
_________________________________________________________________________

313.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Fremont County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: up Five Point Gulch, ca 1.5 mi E of Texas Creek; W of Pueblo on U.S. Hwy 50.  Elev. 7000 ft.
T19S R73W S6; also E1/2 S8, E1/2 S21, E1/2 S9, W1/2 S3, S2, S5.  38.427 N, 105.5791 W.  
Canyon and west side of ridge in pinyon-juniper. Phenology: flowering. 

Brian Elliott, 6358.  6/3/1999. 		RM 829295
     with Elizabeth Mark
_________________________________________________________________________

314.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Fremont County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: along Newlin Creek from Florence Mountain Park at Newlin Trailhead on County Road 15, S of Florence.  Elev. 7500 ft.
T20S R70W S35 SW1/4; also SE1/4 S34, SE1/4 S33 and T19N R70W N1/2 S3.  38.2677 N, 105.1879 W.  
Picea engelmannii/Pseudotsuga menziesii. Phenology: fruiting. 

Brian Elliott, 6583.  6/6/1999. 		RM 829294
     with Elizabeth Mark
_________________________________________________________________________

315.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Custer County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: San Isabel National Forest: up Mason Gulch off Forest Road 388, ca 2 air mi SE of Greenwood.  Elev. 7400 ft.
T21S R69W S26 S1/2; also N1/2 S35.  38.2102 N, 105.1089 W.  
Mixed ponderosa pine-gambel oak. Phenology: fruiting. 

Brian Elliott, 7332.  6/17/1999. 		RM 829293
     with Elizabeth Mark and Kenneth Elliott
_________________________________________________________________________

316.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: ca 1 mi E of Rye on Colo Hwy 165.  Elev. 6500 ft.
T24S R67W S32 N1/2.  37.9184 N, 104.9076 W.  
Roadside. Phenology: flowering. 

Brian Elliott, 7612.  6/21/1999. 		RM 829292
_________________________________________________________________________

317.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Pathfinder Reservoir: North Platte River E of BLM Road 3108, ca 4.2 air mi N of Kortes Dam.  Elev. 5860 ft.
T26N R84W S9 SE1/4; also S16.  42.2385 N, 106.8902 W.  
Greasewood flats at rivers edge; disturbed. Phenology: vegetative only. 

Amy J. Roderick, 7006.  7/20/1998. 		RM 666237	Barcode: RM0215609
_________________________________________________________________________

318.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Custer County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: San Isabel National Forest: north side of Colo Hwy 96, ca 1 mi E of McKenzie Junction (jct of Colo hwys 165 and 96).  Elev. 8000 ft.
T21S R70W S36 SW1/4.  38.181 N, 105.1638 W.  
Pinus ponderosa-Pseudotsuga menziesii woodland. Phenology: fruiting. 

Brian Elliott, 8524.  7/9/1999. 		RM 829291
     with Elizabeth Mark
_________________________________________________________________________

319.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: on Colo Hwy 96 at the junction of Siloam Road, ca 6 air mi E of Wetmore.  Elev. 5450 ft.
T21S R68W S3 NE1/4.  38.254 N, 104.9808 W.  
Irrigation ditch and roadside. Phenology: fruiting. 

Brian Elliott, 8653.  7/9/1999. 		RM 829290
     with Elizabeth Mark
_________________________________________________________________________

320.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Phillips County: Assiniboine Creek and ridge to the NE, ca 2.5 air mi W of the Milk River, ca 8 air mi NNE of Malta.  Elev. 2330-2540 ft.
T31N R30E S8 E1/2.  48.4619 N, 107.8488 W to 48.4547 N, 107.8551 W; NAD 83, GPS reading.  
Wooded thickets on hillsides and bottoms. Phenology: buds. 

Joseph L. M. Charboneau, 4405.  6/4/2011. 		RM 
_________________________________________________________________________

321.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Phillips County: Spring Coulee, W of U.S. Hwy 191, ca 1.5 air mi W of the Milk River, ca 10.5 air mi NNE of Malta.  Elev. 2270-2500 ft.
T32N R30E S36 N1/2.  48.496 N, 107.7649 W to 48.4936 N, 107.771 W; NAD 83, GPS reading.  
Wooded thickets. Phenology: vegetative only. 

Joseph L. M. Charboneau, 4505.  6/4/2011. 		RM 
_________________________________________________________________________

322.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Valley County: Windy Ridge and Papoose Creek, ca 1 air mi SSW of Erie Reservoir, ca 15 air mi N of Hinsdale; ca 36 air mi NW of Glasgow.  Elev. 2560-2710 ft.
T33N R35E S24 N1/2.  48.6081 N, 107.085 W; NAD 83, GPS reading.  
Coulee bottom thickets. Phenology: vegetative only. 

Joseph L. M. Charboneau, 5300.  6/19/2011. 		RM 
_________________________________________________________________________

323.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Valley County: Opheim Hills: Slaughter Coulee, ca 6.5 air mi NNE of Pikes Peak, ca 6.5 air mi WNW of Opheim; ca 48 air mi NNE of Glasgow.  Elev. 3120-3250 ft.
T36N R40E S18 NW1/4.  48.8777 N, 106.5374 W to 48.8812 N, 106.535 W; NAD 83, GPS reading.  
Aspen grove on north-facing slope. Phenology: vegetative only. 

Joseph L. M. Charboneau, 7085.  7/9/2011. 		RM 
_________________________________________________________________________

324.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Valley County: Charles M. Russell National Wildlife Refuge: Cut Throat Coulee at terminus of Refuge Road 325, ca 4.5 air mi N of Bonetrail Boat Ramp, ca 44 air mi WSW of Fort Peck; ca 43 air mi SW of Glasgow.  Elev. 2720-2920 ft.
T23N R35E S20 South1/2; also S19 SE1/2.  47.7396 N, 107.2542 W to 47.7386 N, 107.2674 W; NAD 83, GPS reading.  
Coulee bottom and sides shaded by ponderosa pine forest on the north-facing slopes on sandy to clay soil. Phenology: fruiting. 

Joseph L. M. Charboneau, 8584.  8/2/2011. 		RM 
_________________________________________________________________________

325.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Mesa County: Colorado River Valley: De Beque Canyon along I-70 N of Colo Hwy 65, ca 18 air mi ENE of Grand Junction.  Elev. 4920 ft.
T10S R97W S7 SE1/4 NW1/4.  39.2049 N, 108.2643 W; NAD 83, , GPS reading.  
Sandy slopes beneath bluffs. Phenology: fruiting. 

Michael K. Kirkpatrick, 4749.  5/17/2011. 		USFS 898419	Barcode: USFS0059886
_________________________________________________________________________

326.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: Red Shale Campground and vicinity on U. S. Hwy 212 above East Fork Otter Creek, ca 6 air mi E of Ashland.  Elev. 3140-3240 ft.
T3S R45E S14 SW1/4.  45.571 N, 106.1467 W; NAD 83, , Nat. Geog. TOPO!.  
Draw in ponderosa pine woods. Phenology: flowering. 

B. E. Nelson, 77319.  6/17/2009. 		USFS 884983	Barcode: USFS0053929
_________________________________________________________________________

327.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Idaho, Lemhi County: Salmon River canyon: lower Cove Creek where trail crosses the stream, 8.0 air mi WSW of Shoup.  Elev. 3243 ft.
T23N R17E S13.  
<25 individuals estimated in mesic soil within herbaceous riparian vegetation, 14 degree slope, SSE  aspect, gneiss geology. Phenology: flowering. 

Joshua J. Irwin, 8359.  5/28/2012. 		RM 
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328.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Idaho, Lemhi County: Salmon National Forest: Salmon River Mountains: Hot Springs on Hot Springs Creek, 5.6 air mi SSW of Shoup.  Elev. 4277 ft.
T23N R18E S22.  45.30695 N, -114.33837 W; NAD83, uncertainty 10 m., Field Notes.  
Well developed soil in mesic herbaceous riparian vegetation; 4° slope, WNW aspect; granite geology. Population is dominant throughout the area. Phenology: flowering. 

Joshua J. Irwin, 1448.  6/24/2010. 		RM 
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329.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Utah, Daggett County: North Slope Uinta Mountains: Flaming Gorge National Recreation Area: ca 2 air mi S of Dutch John on the east side of the Green River, south of Flaming Gorge Dam.  Elev. 5600 ft.
T2N R22E S15 E1/2.  
Pinyon-juniper woodlands, some riparian areas, and west-facing red sandstone cliffs. Phenology: fruiting. 

C. H. Refsdal, 1640.  7/11/1994. 		 
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330.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Idaho, Lemhi County: Northern Salmon River Mountains: Salmon Wild and Scenic River: Salmon River Trail from ca 1 mi E to Horse Creek.  Elev. 2850-2900 ft.
T24N R14E S27 N1/2.  45 23.704' N, 114 42.923' W to 45 23.781' N, 114 43.915' W; NAD 83, , GPS reading.  
Trail with steep boulder field on either side, shrubs scattered along river. Phenology: flowering. 

Ronald L. Hartman, 91548.  6/13/2011. 		RM 
     with Emma E. Stewart
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331.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Montrose County: Uncompahgre Plateau: Freshet Draw, W of Happy Canyon, ca 6 air mi SSW of Montrose.  Elev. 6280-6330 ft.
T48N R9W S19 SE1/4.  38.3959 N, 107.8999 W to 38.3991 N, 107.8979 W; NAD 83, , GPS reading.  
Bottom of draw in sandstone canyon. Phenology: fruiting. 

Lori E. Brummer, 3335.  5/29/2011. 		RM 
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332.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Colorado, Mesa County: Uncompahgre Plateau: Dillard Mesa, junction of Forest Road 504 and Forest Road 501, ca 24 air mi SW of Delta.  Elev. 8320-8400 ft.
T49N R14W S15 W1/2.  38.5125 N, 108.4212 W; NAD 83, , GPS reading.  
Cracks in sandstone in ponderosa pine. Phenology: flowering. 

Lori E. Brummer, 4882.  7/8/2011. 		RM 
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333.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Idaho, Lemhi County: Salmon National Forest: Salmon River Mountains: Salmon Wild and Scenic River: Wheat Creek to 0.7 air mi to NW.  Elev. 2939-2945 ft.
T24N R14E S35 E1/4.  45.3703 N, 114.6875 W to 45.3783 N, 114.6994 W; NAD 83, , GPS reading.  
Base of rocky to boulder covered slopes at edge of trail. Phenology: flowering. 

Ronald L. Hartman, 89541.  5/18/2010. 		RM 
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334.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Platte County: Camp Guernsey: Broom Creek Canyon, ca 0.8 km S of Patten Creek, ca 0.8 km SE of Spring Creek.  Elev. 1469 m.
zone DMC, 519000E, 4695500N to 519000E, 4694800N; unknown, GPS reading.  
Ephemeral creek and canyon walls; canyon walls and slopes; sandy loam creek bottom and calcareous sandstone walls; with Bromus inermis, Pinus ponderosa, Juniperus scopulorum, Ribes spp. Common; ascending, rhizomatous shrub; 20-50 cm tall. Phenology: vegetative only. 

Patricia P. Douglas, 88.  6/13/1995. 		RM 957804	Barcode: RM0219614
     with B. E. Nelson, Carlos A. Popolizio, Rosalie M. Smith
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335.  Toxicodendron rydbergii (Small ex Rydb.) Greene 				Anacardiaceae

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Seminoe Mountains: Morgan and Marking Pen creeks on County Road 351, ca 2 air mi W of Seminoe Dam.  Elev. 6900 ft.
T25N R84W S6 SW1/4.  42.1663 N, 106.9291 W.  
Along creek; cottonwood and aspen common. Phenology: vegetative only. 

Amy J. Roderick, 8095.  8/12/1998. 		RM 666236	Barcode: RM0215610
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