Sonchus arvensis ssp. uliginosus (1997)
ASTERACEAE
Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman
U.S.A., Wyoming, Park County: Northern Absaroka Area: Bobcat Creek Trail.
Sagebrush slope and streamside. Phenology: flowering.
Accession: RM 653855, Barcode: RM0049482

Sonchus arvensis ssp. uliginosus (1997)
ASTERACEAE
Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman
U.S.A., Wyoming, Park County: Northern Absaroka Area: road on south side of the North Fork Shoshone River, ca 5 air mi E of Wapiti.
Elev. 5600 ft.
River margins and irrigation ditch and riparian area. Phenology: flowering.
Accession: RM 653856, Barcode: RM0049485

Sonchus arvensis ssp. uliginosus (1997)
ASTERACEAE
Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman
U.S.A., Wyoming, Park County: Northern Absaroka Area: Buffalo Bill Reservoir, ca 12 air mi ESE of Wapiti.
Elev. 5500 ft.
Lakeside, roadside, and along irrigation canal. Phenology: flowering.
Accession: RM 653857, Barcode: RM0049484

U.S.A., Wyoming, Park County: [location and coordinates withheld]
Elev. 5800 ft.
Roadside in clayey soil. Phenology: flowering.

U.S.A., Wyoming, Converse County: Thunder Basin National Grassland and Vicinity: Stinking Water Creek on County Road 31, ca 34 air mi SSW of Wright; ca 42 air mi NNW of Douglas.
Grassy creek bottom. Phenology: flowering.
Peter J. Ebertowski, 2671. 8/5/2002.
Accession: RM (unaccessioned)

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: Kellog Reservoir on Forest Road 914, ca 9.5 air mi ESE of Upton; ca 18 air mi NW of Newcastle.
Bank of reservoir. Phenology: flowering & fruiting.
Accession: RM (unaccessioned)

U.S.A., Wyoming, Converse County: Thunder Basin National Grassland and Vicinity: reservoir on creek immediately W of Sheep Creek and S of its confluence with Sheep Creek, ca 21 air mi NE of Bill; ca 35 air mi SE of Wright.
Creek bank lined by Elaeagnus. Phenology: flowering.
with B. E. Nelson
Accession: RM (unaccessioned)

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: School Creek ca 1.5 air mi S of its confluence with Little Thunder Creek, on School Creek or Forest Road 968, ca 17 air mi ESE of Wright; ca 47 air mi SSE of Gillette.
Wide flat creek bank dominated by Spartina and Cirsium. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: immediately N of U.S. Hwy 14, 16, & 20, ca 0.5 mi W of the mouth of Libby Creek.
In wet area along highway. Phenology: fruiting.

U.S.A., Wyoming, Park County: Absaroka Mountains: Shoshone National Forest: along U.S. Hwy 14-16-20 just E of Pagoda Creek.
Open, disturbed road shoulder. Phenology: flowering & fruiting.

U.S.A., Montana, Park County: Paradise Valley: Grey Owl/Chicory Public Fishing accesses along the west side of the Yellowstone River, 19 mi S of Livingston.
T5S R8E S14
Disturbed riparian community adjacent to corrals with Bromus tectorum, Melilotus officinalis, Centaurea maculosa, and Populus balsamifera. Phenology: flowering.

U.S.A., Montana, Carbon County: East Bridger, along Burlington Northern tracks E of town.
T6S R23E S22
Disturbed area around grain elevators with Distichlis stricta, Bromus tectorum, and Kochia scoparia. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Bighorn Basin: Cody city reservoir S of town.
T52N R101W S6
Disturbed areas along paths adjacent to reservoir with Kochia scoparia, Amaranthus retroflexus, Convolvulus arvensis, and Euphorbia glyptosperma. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Gros Ventre Area: ca 5 air mi NW of Bondurant.
Along river. Phenology: flowering.
with Stuart Markow
Accession: 650775, Barcode: RM0312202

U.S.A., Wyoming, Laramie County: Southeastern Plains: along Sprager Creek.
T17N R64W S9; also S10
Riparian: on David Hansen property. Phenology: flowering & fruiting.
Accession: (unaccessioned)

U.S.A., Wyoming, Laramie County: Southeastern Plains: along Little Horse Creek (Harding property).
T17N R63W S4
Riparian. Phenology: flowering & fruiting.
Accession: (unaccessioned)

U.S.A., Wyoming, Natrona County: North Platte River Valley: east bank of North Platte River, ca 0.1 mi N of confluence of Bates Creek.
Shepherdia argentea shrub community parallel to main channel at edge of floodplain and on first terrace with understory of Poa pratensis, Agrostis stolonifera, and Cirsium arvense on cobbles and alluvium. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Across Green River from La Barge.
Meadow with Pentaphylloides and Aster. Phenology: flowering & fruiting.

U.S.A., Wyoming, Teton County: Grand Teton National Park: north side of Pacific Creek, ca 0.3 air mi W of confluence with Emma Matilda Lake outlet, ca 1.5 mi N of Moran, 1 mi NE of U.S. Hwy 89/191/287.
43.863° N, 110.5116° W; NAD 83, uncertainty 700 ft., Nat. Geog. TOPO!
Gravel bar with Agrostis stolonifera, Polygonum lapathifolium, Populus angustifolia, Salix eriocephala. Phenology: flowering & fruiting.

U.S.A., Wyoming, Teton County: Jackson Hole: wetland ca 0.15 mi S of Nowlin Pond #1 (southernmost of string of 4 ponds) along northeast side of gravel road at northeast end of Millers Butte, ca 2 3/4 mi NE of Jackson, ca 2.2 mi E of U.S. Hwy 26/89/187.
Dry banks of pond on gravelly fill; weedy community with Gutierrezia sarothrae, Medicago sativa, Songhus uliginosus. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Laramie Basin: south shore of Meeboer Lake, ca 1.2 mi NW of Wyo Hwy 230 and 4.2 mi E of east end of Lake Hattie, ca 12 air mi SW of Laramie.
Moist, slightly alkaline soil in community of Scirpus pungens-Juncus balticus along shore of lake, bordered by moist low spots dominated by Carex simulata. Phenology: flowering.
with Laura Welp

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Sublette Range: ca 18 air mi N of Cokeville.
Hillside spring and beaver ponds with adjacent meadows, sagebrush, and lodgepole pine stands. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Nugget Canyon, just S of Nugget.
Pondside willows and sagebrush, adjacent sagebrush, and open hillside. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Salt Creek, just S of Bridger-Teton National Forest, ca 25 air mi N of Cokeville.
Pondside willows and sagebrush, adjacent sagebrush, and open hillside. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Twin Creek, ca 3.5 air mi W of Nugget.
Creek edges in ten foot deep creek cut through sagebrush surroundings. Phenology: flowering & fruiting.
with Ronald L. Hartman

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Bear River, ca 3.5 air mi N of Leefe.
Riverside meadows, marshes, and willows. Phenology: flowering.
with Ronald L. Hartman

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: ca 2 air mi E of Leefe.
Ditchsides and dry reservoir in surrounding sagebrush. Phenology: flowering.
with Ronald L. Hartman

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Hams Fork, ca 2.5 air mi S of Kemmerer.
Riverside meadows, willows, and sagebrush. Phenology: flowering.

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Teton Reservoir E of Wyo Hwy 71, ca 12.4 air mi S of Rawlins.
Riparian area surrounding reservoir. Phenology: flowering.

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Kindt Reservioir E of Wyo Hwy 71, ca 14.7 air mi SE of Rawlins; ca 13 air mi S of Sinclair.
Dry shores of reservoir lined with Tamarix chinensis. Phenology: flowering.

U.S.A., Colorado, Gunnison County: Southern Gunnison Basin: ca 1.5 air mi N of Maple Leaf Mine; ca 5 road mi S of U.S. Hwy 50; ca 10 air mi SE of Gunnison along Colo Hwy 114.
Roadside. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Wetlands and Adjacent Areas: Green River, ca 12 air mi NNE of La Barge.
Moist banks. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Wetlands and Adjacent Areas: flooded highway easement, ca 12 air mi SE of Medicine Bow.
Emergent in standing water. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Wetlands and Adjacent Areas: Hunt Creek, ca 32 air mi S of Casper.
Dry creek bed. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Wetlands and Adjacent Areas: Gelatt Lake, ca 15 air mi SW of Laramie.
Moist banks and uplands. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Wetlands and Adjacent Areas: Rock Creek, 16 air mi SE of Medicine Bow.
Moist banks and flood plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Wetlands and Adjacent Areas: Gooseberry Creek, ca 36 air mi NNE of Rawlins.
Heavily grazed moist banks and flood plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Wetlands and Adjacent Areas: Antelope Creek, ca 36 air mi ESE of Rock Springs.
Moist banks and flood plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Wetlands and Adjacent Areas: Green River, ca 30 mi NNW of Rock Springs.
Moist river banks and exposed bottoms. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Wetlands and Adjacent Areas: Green River, ca 36 air mi NW of Rock Springs.
Moist banks of pond. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Wetlands and Adjacent Areas: Green River, ca 45 air mi NW of Rock Springs.
Moist banks. Phenology: fruiting.

U.S.A., Wyoming, Lincoln County: Wetlands and Adjacent Areas: Hams Fork, ca 11 air mi NW of Kemmerer.
Moist banks. Phenology: fruiting.

U.S.A., Wyoming, Uinta County: Wetlands and Adjacent Areas: Blacks Fork, ca 6 air mi NE of Lyman.
Submerged banks and flood plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wetlands and Adjacent Areas: Carr Reservoir, ca 17 air mi SE of Lander.
Moist banks and shorelines. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wetlands and Adjacent Areas: Ocean Lake, ca 18 air mi NW of Riverton.
Moist shoreline and flood plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wetlands and Adjacent Areas: Ocean Lake, ca 16 air mi NW of Riverton.
Moist shores and flood plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Wetlands and Adjacent Areas: East Fork River, ca 15 air mi SE of Pinedale.
Moist banks and flood plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Wetlands and Adjacent Areas: irrigation ditch and spring-fed stream, ca 2 air mi SE of Pinedale.
Moist banks and hummocks. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Wetlands and Adjacent Areas: Little Soda Lake, ca 8 air mi NE of Pinedale.
Dry uplands. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Wetlands and Adjacent Areas: Deaver Reservoir, ca 2 air mi NNW of Deaver; ca 12 air mi NE of Powell.
Exposed mud flats. Phenology: flowering.

U.S.A., Wyoming, Hot Springs County: Wetlands and Adjacent Areas: Big Horn River, ca 4 air mi S of Thermopolis.
Along moist river bank. Phenology: flowering & fruiting.

U.S.A., Wyoming, Campbell County: Wetlands and Adjacent Areas: Little Thunder Reservoir, ca 7 air mi SE of Wright.
Exposed mud flats. Phenology: flowering & fruiting.

U.S.A., Wyoming, Teton County: Wetlands and Adjacent Areas: Horsetail Creek, ca 14 air mi NE of Jackson.
Moist hummocks and creek banks. Phenology: flowering.
with James Pray

U.S.A., Wyoming, Teton County: Wetlands and Adjacent Areas: Snake River, ca 4 air mi NW of Jackson.
Moist shores and flood plains of retention pond. Phenology: flowering & fruiting.
with James Pray

U.S.A., Wyoming, Carbon County: Along lower Brush Creek near the Platte River.
41.2679° N, 106.6221° W; NAD 83, uncertainty 1 mi., Digital Map
Roadside weed. Heads yellow. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Twin Buttes Reservoir, 15 mi SW of Laramie.
41.2371° N, 105.8504° W; NAD 83, uncertainty 0.75 mi., Digital Map
Roadside weed, moist alkaline soil. Phenology: flowering & fruiting.
with Marjorie W. Porter

U.S.A., Wyoming, Uinta County: Evanston.
Phenology: flowering & fruiting.
Albert Mylroie, 1. 8//1938.

U.S.A., Wyoming, Carbon County: Along Wyo Hwy 130 E of the North Platte River.
Along an irrigation ditch. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Camp Guernsey: western bank of North Platte River, ca 1 km SW of the city of Guernsey, ca 0.4 km NW of Lucindy Rollins Grave.
Elev. 1340 m.
Locally common on level riverine of sand with Populus deltoides, Elaeagnus angustifolia, Symphoricarpos occidentalis, Phalaris arundinacea, and Carex spp. Phenology: flowering & fruiting.
with C. A. Popolizio

U.S.A., Wyoming, Big Horn County: Road to Horseshoe Bend.
Calcareous slope. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Absaroka Mountains: North Fork Shoshone River Drainage: along U.S. Hwy 14, 16, and 20, along North Fork Shoshone River, ca 1/4 mi W of Moss Creek.
In marsh. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Absaroka Mountains: North Fork Shoshone River Drainage: along the river 0.3-0.5 mi W of Sweetwater Creek.
Along river. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: along Elk Fork Creek, ca 9-10 mi S of U.S. Hwy 14, 16, & 20.
On sand and gravel bars. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Southeastern Absarokas: Stratford Ranch, along east side of South Fork Shoshone River, ca 42 mi SW of Cody; S, W, and N of main ranch buildings and corrals.
Riparian areas. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Shoshone Indian Reservation, near Wind River Post Office.
Common in waste places in irrigated area. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Deadhead Creek, 6 road mi E of Wyo Hwy 34, 12 road mi SW of Wheatland.
Creek banks and creek bed. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Separation Creek, ca 16.5 air mi NNW of Rawlins.
Scattered in clay loam along stream bank with aster, Atriplex patula, Cirsium arvense, and Juncus balticus. Phenology: flowering & fruiting.
with Andrew Warren

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Haines Reservoir and ditch on County Road 640, ca 5.5 air mi SW of Saratoga; ca 14 air mi NW of Encampment.
Banks of ditch bordered by willow. Phenology: flowering & fruiting.

U.S.A., Wyoming, Laramie County: High Plains Grasslands Research Station, NW of Cheyenne.
Cultivated areas. Phenology: vegetative only.

U.S.A., Wyoming, Laramie County: High Plains Grasslands Research Station, NW of Cheyenne.
Cultivated areas. Phenology: flowering & fruiting.

U.S.A., Wyoming, Uinta County: Alkali Creek, 1.5 mi N of U.S. Hwy 30.
Riparian area in sagebrush and greasewood community. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Junction of County Road 61 and U.S. Hwy 30.
Roadside. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Switchbacks of the Loop Road.
Roadsides. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Saratoga Lake E of Wyo Hwy 130, ca 1.2 air mi ENE of Saratoga; ca 18 air mi N of Encampment.
Wetlands and disturbed gravelly area surrounding lake. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Across Green River from La Barge.
Meadow with Pentaphylloides and Aster.

U.S.A., Wyoming, Lincoln County: Across Green River from La Barge.
Meadow with Pentaphylloides and Aster. Phenology: flowering & fruiting.
Accession: RM 643042

U.S.A., Wyoming, Big Horn County: Basin.
Banks of irrigation ditches. Phenology: flowering & fruiting.

U.S.A., Wyoming, Hot Springs County: Thermopolis.
Disturbed area near hot springs. Phenology: flowering & fruiting.

U.S.A., Wyoming, Hot Springs County: Foothills of the Absaroka and Owl Creek Mountains: west end of Padlock Rim; ca 3 air mi SE of Hamilton Dome; ca 17 air mi WNW of Thermopolis.
Wet, clay-rich stream bed and drier side slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Natrona County: North Platte River Valley: west side of North Platte River at Alcova, between Alcova Reservoir and Gray Reef Reservoir, ca 0.5 mi SE of Wyo Hwy 220, ca 27 air mi SW of Casper.
Sandy-clay banks of river with dense grass understory of Bromus inermis and Elymus cinereus below Symphoricarpos, Artemisia cana, Sarcobatus and Shepherdia argentea. Phenology: flowering & fruiting.

U.S.A., Wyoming, Uinta County: Mountain View.
Disturbed meadow in dry, loamy, slightly alkaline soil. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: East Fork Medicine Bow River, ca 4.6 air mi NE of Elk Mountain townsite.
Wet boggy area on periphery of cottonwood-lined river. Phenology: flowering & fruiting.

U.S.A., Wyoming, Teton County: Grand Teton National Park and Vicinity: Jackson Hole: near Two Ocean Lake, ca 4 air mi N of Moran; ca 19.5 air mi NNE of Moose.
Riparian community with small seasonal stream. Phenology: flowering & fruiting.
Annotations:
1. Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman
Annotated by David Scott.
with Andrew Bishop

U.S.A., South Dakota, Lyman County: Brakke Lake.
Common, shoreline. Phenology: flowering & fruiting.
Stephen Van Sickle, 361. 8/15/1982.
Accession: RM 346196

U.S.A., Colorado, Jackson County: Along North Fork Platte River, 3 mi SE of south end of Lake John.
Moist alluvial soil at edge of river bank with Salix. Phenology: flowering.
Accession: RM 393727

U.S.A., Colorado, Delta County: 2 mi E of Delta.
5% west slope; rich, black, moist loam; roadside, park. Phenology: flowering & fruiting.
Annotations:
Annotated by Ronald L. Hartman in 2003.
Accession: USFS 484378

U.S.A., Idaho, Clark County: Targhee National Forest: Beaverhead Range: along Crooked Creek in Crooked Creek Canyon, ca 26 air mi NW of Dubois.
T11N R32E S17; also S20
Open canyon bottom dominated by Artemisia, Chrysothamnus, and forbs.
Accession: (unaccessioned)

U.S.A., Idaho, Clark County: Targhee National Forest: Beaverhead Range: along Crooked Creek in Crooked Creek Canyon, ca 26 air mi NW of Dubois.
T11N R32E S17; also S20
Riparian dominated by Salix, Ribes, and Rosa.

U.S.A., Idaho, Fremont County: Targhee National Forest: Island Park Plateau: Eccles Road, W of intersection with Mesa Falls Road, ca 16.5 air mi NE of Ashton.
T12N R43E S32
Clearcut in Pinus contorta, dominated by forbs and grasses, with scattered Pinus contorta regeneration.

U.S.A., Idaho, Fremont County: Targhee National Forest: Henrys Lake Mountains: road above and S of Tygee Creek, ca 8 air mi SW of West Yellowstone, Montana.
T15N R44E S8; also S9
Coniferous forest dominated by Picea engelmannii and Abies lasiocarpa.

U.S.A., Wyoming, Sweetwater County: [location and coordinates withheld]
Around the big springs on the greasewood flat above the draw. Phenology: flowering.
Accession: 648434, Barcode: RM0312204

U.S.A., Wyoming, Carbon County: South-central Wyoming: along Deep Gulch just above Cow Creek, ca 7 air mi E of Dad on Mexican Flats, ca 38 air mi SW of Rawlins; ca 20.5 air mi N of Baggs.
Stream bank. Phenology: flowering.
Accession: 648433, Barcode: RM0312203

U.S.A., Wyoming, Sweetwater County: South-central Wyoming: along Vermillion Creek, ca 2.5 air mi SE of Wyo Hwy 430 intersection with Vermillion Creek; ca 42 air mi SSE of Rock Springs.
Creek bottom. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: [location and coordinates withheld]
Adjacent to alkali pond. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Sierra Madre: North Fork Willow Creek, ca 6 air mi SW of Encampment.
T14N R85W S25
Open, disturbed meadow, near pond with Aster hesperius. Rare. Phenology: flowering.

U.S.A., Wyoming, Teton County: Wyoming/Salt River Ranges: Wyoming Range: Willow Creek Drainage: along lower Willow Creek between Sob and Alder creeks, ca 5-5.5 air mi SE of Hoback Junction, ca 15.5-16.5 air mi SSE of Jackson.
Cobblestone sandbar.

U.S.A., Wyoming, Sublette County: Wyoming/Salt River Ranges: Wyoming Range: along North Horse Creek, ca 0.5 mi N of Merna Butte; ca 2 air mi W of Merna; ca 27 air mi WNW of Pinedale.
Meadows with scattered Artemisia cana, Potentilla fruticosa and willow thickets. Phenology: flowering.
with Russ Nelson

U.S.A., Wyoming, Lincoln County: Wyoming/Salt River Ranges: Salt River Range: Quaking Aspen Hollow just off Dry Creek, ca 4 air mi SE of Afton.
Roadside. Phenology: flowering.
with Russ Nelson

U.S.A., Wyoming, Lincoln County: Wyoming/Salt River Ranges: Wyoming Range: Blind Bull Lake, ca 21.3 air mi NE of Afton.
At edge of lake in lodgepole pine forest. Phenology: flowering.
with Russ Nelson

U.S.A., Wyoming, Lincoln County: [location and coordinates withheld]
Streamside and adjacent uplands. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: [location and coordinates withheld]
Riverside and marshy meadows. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Wyoming/Salt River Ranges: Salt River Range: Commissary Ridge, southwest flank: Pole Creek, southern border of Bridger-Teton National Forest NNE 0.3 air mi.
Willow thickets and stream banks. Phenology: flowering & fruiting.

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: along Gooseberry Creek, ca 1 mi W of Wyo Hwy 120; ca 3.5 air mi E of Dickie (LU Ranch); ca 34.5 air mi NW of Thermopolis.
Willow-rose-gooseberry thickets in creek bottom.

U.S.A., Wyoming, Park County: Bighorn Basin: along Gooseberry Creek, ca 10.5 air mi SSE of Meeteetse.
Creek bottom.

U.S.A., Wyoming, Carbon County: Medicine Bow Mountains:
Phenology: flowering.
with Linda Nelson

U.S.A., Wyoming, Park County: Northern Absarokas: red ridge between Paint and Blaine Creeks on County Road 7RO, ca 4.5 air mi N of Pat O'Hara Mountain, ca 18 air mi NW of Cody.
Vernal pond on gypsum. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Bighorn Basin: Shearing Pens Reservoir above West Branch Whistle Creek, ca 12 air mi SE of Powell.
Along shores of reservoir.

U.S.A., Wyoming, Sweetwater County: Washakie Basin: ca 7.3 mi S of Wamsutter on County Road 23 then ca 15.5 mi SW.
Common in alkali clay in dry part of marsh with Juncus.

U.S.A., Wyoming, Big Horn County: Bighorn Basin: along Whistle Creek, ca 6 air mi SW of Byron, ca 12 air mi SW of Lovell.
Wooded stream bottom.

U.S.A., Wyoming, Teton County: West Slope Wind River Range: Fish Creek/Moccasin Basin area, along South Fork Fish Creek just above confluence with North Fork, ca 30-31 air mi ENE of Jackson.
Cobblestone sandbar. Phenology: flowering & fruiting.

U.S.A., Wyoming, Johnson County: Big Horn Mountains: along U.S. Hwy 16 above Hondo Creek, ca 2 air mi S of Hunter Mesa; ca 13 air mi WSW of Buffalo.
Roadside. Phenology: flowering & fruiting.
with Gael Fonken

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: ca 9.5 air mi NW of Thermopolis along Wyo Hwy 170.
Along alkali stream and wet bottom. Phenology: flowering & fruiting.

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: ca 9.5 air mi NW of Thermopolis along Wyo Hwy 170.
Along alkali stream and wet bottom.

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: Wind River Indian Reservation: overflow area along South Fork Owl Creek, ca 25 air mi WNW of Thermopolis; ca 8 air mi SW of Hamilton Dome on Wyo Hwy 174.
Around the edges of the ponds.

U.S.A., Wyoming, Washakie County: Bighorn Basin: Rock Waterhole Reservoir, ca 22 air mi NW of Worland on Fifteenmile Creek Road.
Clay slopes around the reservoir.

U.S.A., Wyoming, Big Horn County: Bighorn Basin: along the Greybull River, ca 24 air mi W of Basin; ca 5 air mi SW of Burlington.
Under trees in piles of (detris?) in mud of an overflow channel.

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: along the Big Horn River, ca 7 air mi NNE of Thermopolis; ca 1 air mi ENE of Lucerne.
Marshes and irrigation overflow areas.

U.S.A., Wyoming, Carbon County: Medicine Bow Mountains: .3 mi from Wyo Hwy 130 on South French Creek Road.
Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wind River Basin: Lake Cameahwait, ca 20 air mi ENE of Riverton, south side of appraoch of Cottonwood Drain to Lake Cameahwait.
Creek bank. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wind River Basin: Lake Cameahwait, ca 21 air mi ENE of Riverton, N of Cottonwood Drain and northwest corner of Lake Cameawait.
Moist alkali soil near creek. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wind River Basin: Ocean Lake, east side, ca 3 air mi WSW of Midvale.
Meadow at edge of lake. Phenology: flowering & fruiting.
with Georgia Haines

U.S.A., Wyoming, Sweetwater County: Rock Springs Uplift: above Dry Canyon, and along Salt Wells Creek, ca 24 air mi SE of Rock Springs.
Sandstone uplift above canyon, with sandy areas, and Juniperus osteosperma, Pinus flexilis, Pseudotsuga, Cercocarpus montanus and C. ledifolius, on broad expanse of exposed rock, flats along creek; along creekbed. Phenology: flowering & fruiting.

U.S.A., Wyoming, Washakie County: Big Horn Mountains: Spring Creek Road 6.7 mi E and S of junction with Wyo Hwy 434.
Seepage areas along small stream, sagebrush slopes, thickets of serviceberry and aspen; creek bank. Phenology: flowering & fruiting.
with Keith H. Dueholm

U.S.A., Wyoming, Sheridan County: [location and coordinates withheld]
Plains, rocky slopes, draw with standing water, creek and meadows; meadows. Phenology: flowering & fruiting.

U.S.A., Wyoming, Niobrara County: [location and coordinates withheld]
Large seepage area along small creek below holding dam, sagebrush plains; edge of seepage area. Phenology: flowering & fruiting.

U.S.A., Wyoming, Johnson County: [location and coordinates withheld]
Sandy flats along lake, edges and meadows along creek; meadows. Phenology: flowering & fruiting.

U.S.A., Wyoming, Johnson County: Powder River Basin: ca 5 air mi NNE of Buffalo.
Rolling sagebrush plain over clinker base, hills, occasional clinker outcrops, gravel edges of roadway; ditch. Phenology: flowering & fruiting.

U.S.A., Wyoming, Johnson County: Powder River Basin: Jack Moore Reservoir, along Boxelder Creek, ca 1.5 air mi E of south end of Lake De Smet.
Flats around margin of holding pond, meadow along creek, gravelly roadside, hilly plains on clinker; flats. Phenology: flowering & fruiting.

U.S.A., Wyoming, Johnson County: Powder River Basin: Boxelder Creek, ca 5 air mi ENE of Lake De Smet.
Meadows along creek, sandy plains, ridges; meadow. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sheridan County: Powder River Basin: along U.S. Hwy 87, ca 2 road mi NW of Ranchester.
Wet ditches, meadows along small stream, tall grass prairie of big bluestem and slough grass, between railroad and wet ditch; prairie. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sheridan County: Powder River Basin: along U.S. Hwy 87, ca 2 road mi NW of Ranchester.
Wet ditches, meadows along small stream, tall grass prairie of big bluestem and slough grass, between railroad and wet ditch; along ditch. Phenology: flowering & fruiting.

U.S.A., Wyoming, Natrona County: Oil field, ca 4.2 air mi N of Waltman.
Eroded shale slopes with sandstone outcrops and drainages. Phenology: flowering & fruiting.

U.S.A., Wyoming, Teton County: West Slope Wind River Range: South Fork Fish Creek between Purdy and Hackamore Creeks.
Meadows, gravel bars, and adjacent lodgepole pine forests. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Laramie Plains: Pass Creek Road (Carbon County Route 404), ca 1 mi SW of I 80.
Common along irrigation ditch in hay field. Phenology: flowering & fruiting.
with Barry Hammel

U.S.A., Wyoming, Sublette County: West Slope Wind River Range: Adjacent to Green River Lakes Road, ca 0.5 mi S of Kendall Guard Station, 0.25 mi E of Green River, ca 25 air mi NNW of Pinedale.
Open canopy, dry weedy roadside ditch bordered by sagebrush-grassland. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: West Slope Wind River Range: north shore of New Fork Lakes, ca 17 air mi N of Pinedale.
Rocky/sandy beach.

U.S.A., Wyoming, Converse County: [location and coordinates withheld]
Cottonwood woodland with Elaeagnus and Shepherdia. 1 of 2 sheets Phenology: flowering.

U.S.A., Wyoming, Converse County: [location and coordinates withheld]
Cottonwood woodland with Elaeagnus and Shepherdia. Sheet 2 of 2. Phenology: vegetative only.

U.S.A., Wyoming, Natrona County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Poison Spider Creek on Poison Spider or County Road 201 between Emigrant Gap Ridge and Oil Mountain, ca 18.5 air mi W of Casper.
Sand bars, stream bank, and low moist benches. Phenology: flowering & fruiting.

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.
Sand bars, muddy river bank, and low areas in the river bottom. Phenology: flowering & fruiting.

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: Sinnard Reservoir and vicinity, ca 4.5 air mi WNW of Hawk Springs; ca 19 air mi SSW of Torrington.
Marshy channel below the dam and wet meadows. Phenology: flowering & fruiting.
with Tim Chumley and Robbin Romberg

U.S.A., Wyoming, Natrona County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Rasmus Lee Lake ca 3 air mi W of Bessemer Mountain, ca 17 air mi WSW of Casper.
Moist to wet areas created by siphon leakage. Phenology: flowering & fruiting.
with Tim Chumley and Robbin Romberg

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along the Laramie River above and below Chugwater Creek and along Chugwater Creek, ca 7.5 air mi NE of Wheatland.
Riparian benches, streambanks and adjacent meadows. Phenology: flowering.
with Tim Chumley and Robbin Romberg

U.S.A., Wyoming, Natrona County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Thirtythree Mile Reservoir on South Fork Casper Creek, ca 13 air mi NW of Casper.
On shores of reservoir and surrounding flats and drainages. Phenology: flowering & fruiting.

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: along the North Platte River, ca 1 air mi SW of Fort Laramie (town); ca 20.5 air mi NW of Torrington.
River bank and shore sand bars. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Across river from La Barge.
Meadow with Pentaphylloides and Aster.

U.S.A., Wyoming, Platte County: [location and coordinates withheld]
Calcareous slopes and sandy flats. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Green River Basin: South Piney Creek just E of Bridger-Teton National Forest, ca 19 air mi W of Big Piney.
Creek bottom willows and meadows; hillside Douglas fir stands and sagebrush meadows. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: McNinch Reservoirs 1 and 2, ca 8.5 air mi NW of Big Piney.
Reservoir edge, meadows, and sagebrush with outflow stream meadowed edges. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: Green River Supply Canal, ca 7 air mi S of Daniel.
Canal edge, meadows, willows, and sagebrush. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Green River Basin: east end of Fontenelle Gap, ca 15 air mi W of Fontenelle Reservoir.
Creekside meadows, willow thickets, and rockslides. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: edge of Green River, ca 1 air mi N of La Barge.
Riverside mudflats, meadows, and willows. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Green River Basin: Green River at Slate Creek confluence, ca 1/2 air mi NE of Fontenelle.
Riverside beneath shale bluff, surrounding greasewood and rabbitbrush desert. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Green River Basin: County Road 315, ca 1 air mi SE of Viola.
Roadside meadows and willow lined ditches between irrigated fields. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: Sheep Creek, ca 8.5 air mi NW of Viola.
Sagebrush canyon bottom and side with aspen and various conifer stands and a hillside spring. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Hams Fork, ca 1 air mi N of Frontier.
Riverside meadows, sagebrush, and willows. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Lake Viva Naughton, ca 13 air mi NNW of Kemmerer.
Reservoir edge, meadows, and sagebrush. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Green River Basin: Big Sandy Reservoir and River, ca 9.5 air mi N of Farson.
Reservoir edge sagebrush, riverside meadows and sagebrush. Phenology: flowering.
with Ben and Becky Cramer

U.S.A., Wyoming, Sublette County: Green River Basin: Green River, ca 9 air mi S of Big Piney.
Riverside meadows, sagebrush, and sagebrush bluff. Phenology: flowering.
with Ben and Becky Cramer

U.S.A., Wyoming, Sweetwater County: Green River Basin: Big Sandy River at Gasson Bridge, ca 20 air mi E of Fontenelle Dam.
Riverside meadows, sagebrush, and open hillsides. Phenology: flowering.
with Ben and Becky Cramer

U.S.A., Wyoming, Sweetwater County: Green River Basin: Big Sandy River, ca 1 air mi SW of Farson.
Riverside meadows, sagebrush, and open hillsides. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: New Fork River, ca 10 air mi E of Big Piney.
Riverside meadows, willows, and sagebrush. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Green River Basin: Green River, ca 6 air mi S of La Barge.
Riverside meadows and willows. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: Muddy Creek, ca 8 air mi NNE of Big Piney.
Winding creek through Sarcobatus saltflats. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: New Fork River, ca 3 air mi WNW of Boulder.
Riverside meadows, willows and cottonwoods, stagnant ponds, irrigation ditchsides, and piney bluffside. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Sheridan Training Area: site 2.3 km SE of Peak 4290 (336500E 4967320N), 1.2 km SSW of Peak 4266 (338160E 4966620N). 337920E 4965420N.
Elev. 1210 m.
West to east drainage (slopes level to 20 degrees) on ephemeral drainage and surrounding slopes on clay loam, soil series Haverdad-Worthenton complex, with Grindelia squarrosa, Beckmannia syzigachne, Typha latifolia, Eleocharis, Carex spp. Phenology: flowering.
Patricia P. Douglas, 507. 8/7/1998.
with N. E. Hasting, R. M. Smith

U.S.A., Wyoming, Albany County: Junction of County Road 61 and U.S. Hwy 30.
Annotations:
Annotated by Barry Hammel in 1977.

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.
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: flowering & fruiting.
1. Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman
Annotated by Ronald L. Hartman.

U.S.A., Colorado, Saguache County: [location and coordinates withheld]
Pasture; swampy area in bottom of valley; roadside. Phenology: flowering & fruiting.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: pond on south side of Vermejo River in Vermejo Park just W of employee housing area; 1.6 air mi WNW of Casa Grande.
Shallow muddy pond in old river oxbow, with Juncus spp., Sparganium emersum, Potamogeton spp., Carex spp. Heads yellow; plants apparently rhizomatous; occasional. Phenology: flowering & fruiting.
1. Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman
Annotated by Ben Legler on 3/3/2008.

U.S.A., Montana, Gallatin County: Gallatin Range: Gallatin National Forest: above Big Bear Creek at a tributary along Cliff Creek or Forest Road 6989 ca 2 air mi NW of Wheeler Mountain, ca 11.5 air mi SSW of Bozeman.
Moist meadow and roadside. Phenology: flowering.
Accession: USFS 867761, Barcode: USFS0062192

U.S.A., Wyoming, Albany County: Laramie Plains: right-of-way along County Road 424 (Hanson Lane), just W of intersection with County Road 422 (Pahlow Lane) and County Road 44 (Harmony Lane), ca 16 air mi WSW of Laramie; ca 3 air mi N of Harmony.
On plains, along road. Phenology: flowering.

U.S.A., Wyoming, Natrona County: Upper North Platte and Laramie River Drainages: Goldeneye Wildlife and Recreation Area: Burlington Lake, N of U.S. Hwy 20-26, ca 22 road mi to Casper.
Greasewood-sagebrush flats; alkaline lake shores. Phenology: flowering.

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: Cow Creek Reservoir ca 6 air mi W of Fort Howes Work Center, ca 25 ai mi S of Ashland.
Banks of reservoir, adjacent slopes, and dam. Sheet 1 of 2 Phenology: flowering & fruiting.
Accession: USFS 886797, Barcode: USFS0054469

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: Cook Mountain Hiking and Riding Area: in the vicinity of Cliff Spring and areas SE, W of Forest Road 4772, ca 9 air mi NE of Ashland.
Draw dominated by boxelder, ponderosa pine, and snowberry. Phenology: flowering & fruiting.
Accession: USFS 884472, Barcode: USFS0049313

U.S.A., Colorado, Costilla County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: Forbes Trinchera Ranch: ca 2 mi E of Fort Garland on U.S. Hwy 160.
Along the railroad right-of-way and roadside. Phenology: flowering.
Annotated by Ronald L. Hartman.
with Pete Schneider

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Mud Turtle Reservoir, N of Forest Road 4432, ca 3 air mi NW of Diamond Butte, ca 25.5 air mi SE of Ashland.
In and at margins of reservoir with Salix, Cirsium, Symphoricarpos, Ribes, and Typha. Phenology: flowering & fruiting.

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: Tongue River Breaks Hiking and Riding Area: in the vicinity of Black Eagle Spring N of Forest Road 4023, ca 3.5 air mi WNW of Poker Jim Butte, ca 19 air mi SSW of Ashland.
Hardwood draw dominated by Crataegus and Prunus. Phenology: flowering & fruiting.

U.S.A., Colorado, Las Animas County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: along Purgatorie River, north end of Trinidad.
Riparian, ditch, wetlands. Phenology: flowering.
Annotated by Ronald L. Hartman.
with Elizabeth Mark

U.S.A., Montana, Phillips County: Little Rocky Mountains: along South Big Horn Creek NE of Damon Hill, ca 5-5.5 air mi SE of Hays; ca 46 air mi SW of Malta.
Roadcut bank and adjacent north-facing slope in paper birch-aspen-mixed conifer forest. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: Charles M. Russell National Wildlife Refuge: along the Missouri River at Jones Island just below Bell Bottoms, ca 12 air mi S of DY Junction, ca 63 air mi SW of Malta.
River bottom with cottonwoods to 4' dbh and with willow thickets. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: Cole Ponds State Fishing Area: between the Milk River and Whitewater River, ca 18 air mi NNW of Saco.
Around the edge of ponds in an old gravel pit. Phenology: flowering & fruiting.

U.S.A., Montana, Valley County: Along West Fork Poplar River at Mason Road crossing, ca 10.5 air mi ENE of Opheim; ca 54 air mi NNE of Glasgow.
Low marshy flats and drier meadows along the river. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Shirley Basin: Dome Rock Reservoir E of County Road 291, ca 4.5 air mi N of Leo.
Cottonwoods, willows, and graminoids on reservoir banks. Phenology: flowering.

U.S.A., Montana, Phillips County: Along Midale Road/Refuge Road 212, ca 3 air mi SSE of Karsten Coulee Reservoir, ca 31.5 air mi SE of Zortman; ca 51.5 air mi SSW of Malta.
Moist areas above and below reservior and dam. Phenology: flowering & fruiting.
Joseph L. M. Charboneau, 1867. 7/18/2010.

U.S.A., Montana, Valley County: Mont Hwy 24 at bridge over Dry Fork Creek, ca 8.5 air mi SE of Forsman Reservoir, ca 23.5 air mi NNE of Glasgow.
Moist bottoms along stream/roadside with clay soil. Phenology: flowering & fruiting.
Joseph L. M. Charboneau, 2445. 7/29/2010.

U.S.A., Montana, Valley County: Conehead Reservoir on South Creek, N of Thoeny Road, ca 3.5 air mi NE of Last Chance Reservoir, ca 15 air mi WNW of Opheim.
On clay soil slightly higher than creek bed. Phenology: flowering & fruiting.
Joseph L. M. Charboneau, 2722. 8/1/2010.

U.S.A., Montana, Phillips County: N of Old U.S. Hwy 2 and Bowdoin National Wildlife Refuge, along South Canal, ca 1/4 air mi N of Lake Bowdoin, ca 10.5 air mi ENE of Malta.
Moist ditch bottoms. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: W of Rocky Point Road, ca 4 air mi S of Point of Rocks Reservoir, ca 6.5 air mi SSE of Dodson; ca 8 air mi WSW of Malta.
Moist clay soil surrounding reservoir. Phenology: flowering.

U.S.A., Montana, Phillips County: Shore of Ester Lake, N of Hog Farm Road, ca 3.5 air mi SW of Wild Horse Reservoir, ca 26 air mi SW of Malta.
Moist areas of loamy to clay soil around lake. Phenology: fruiting.

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.
Riparian area. Phenology: flowering & fruiting.

U.S.A., Montana, Valley County: N of Kerr Road, Wards Reservoir, ca 6.5 air mi NE of Forsman Reservoir, ca 17 air mi SW of Opheim.
Moist clay soil surrounding reservoir. Phenology: flowering & fruiting.

U.S.A., Montana, Valley County: Bitter Creek Wilderness Study Area: N of Bitter Creek at unnamed reservoir, ca 7.5 air mi SE of Antelope Pass, ca 33.5 air mi N of Glasgow.
Muddy banks of reservoir and moist low-lying clay soil. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: Little Rocky Mountains: along road between Camp Creek and Beaver Creek, ca 0.5 air mi N of top of Old Scraggy Peak, ca 2 air mi N of Zortman; ca 41.5 air mi SW of Malta.

U.S.A., Montana, Phillips County: Reservoir No. 161, S of U.S. Hwy 191 and W of Rudolph Valley Road, ca 2.5 air mi W of Partnership Reservoir, ca 17 air mi SW of Malta.
Moist grasslands below dam. Phenology: flowering & fruiting.

U.S.A., Montana, Valley County: January Reservoir and vicinity, N of Little Beaver Road, ca 2 air mi ESE of Wilson Reservoir, ca 10 air mi SW of Glasgow.
Moist reservoir edge and dry streamsides. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Laramie Plains: Mortenson Lake National Wildlife Refuge: ca 11 air mi SW of Laramie.
Greasewood/grassland uplands. Yellow flowers. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Laramie Plains: Hutton Lake National Wildlife Refuge: ca 10 air mi SW of Laramie.
Greasewood/grassland uplands. Yellow flowers. Phenology: flowering & fruiting.

U.S.A., Montana, Sheridan County: Medicine Lake National Wildlife Refuge: shallow intermittant stream draining from south into Medicine Lake.
North 1% slope; silt loam, 592m. Abundant. Phenology: flowering & fruiting.
Blaine H. M. Mooers, s.n.. 9/21/1986.
with Gloria R. B. Mooers

U.S.A., Montana, Gallatin County: Manhattan: 0.5 mi E of Manhattan along U.S. 10 Highway.
Abundant. Phenology: flowering & fruiting.
with Clary

U.S.A., Montana, Gallatin County: Exp. Farm, Bozeman.
Phenology: flowering & fruiting.

U.S.A., Montana, Ravalli County: Bitterroot National Forest: Stevensville Admin. Site.
Slope 5% west; sandy loam clay. Phenology: flowering & fruiting.
Accession: USFS 484251

U.S.A., Montana, Missoula County: Lolo National Forest: Holloman Creek rd. - 2.5 mi above forest boundary.
Level slope; gravel-clay soil. Phenology: flowering & fruiting.
Accession: USFS 484252

U.S.A., North Dakota, Cass County: Fargo.
Waste ground. Phenology: fruiting.

U.S.A., North Dakota, Grand Forks County: University of North Dakota Prairie reserve, ca 3 km E of Emerado
Prairie reserve. Phenology: fruiting.

U.S.A., North Dakota, Cass County: Fargo.
Waste ground. Phenology: flowering & fruiting.

U.S.A., North Dakota: Glyndon.

with Ruth A. Nelson

U.S.A., South Dakota, Marshall County: Buffalo Lake: Public Access Area on west side of lake.
Sandy gravelly lake shore. Phenology: flowering & fruiting.

U.S.A., South Dakota, Kingsbury County: Lake Henry.
Among tall grasses and sedges at edge of marsh. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: Bowdoin National Wildlife Refuge: along Refuge Tour Road, near Black Coulee Pond, ca 6 air mi NW of Le Noir Reservoir, ca 3.5 air mi E of the Milk River, ca 7 air mi ENE of Malta.
Wetlands interspersed with groves of cottonwood and Russian olive and chokecherry-willow thickets. Phenology: flowering & fruiting.

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.
Coulee bottom and sides shaded by ponderosa pine forest on the north-facing slopes on sandy to clay soil. Phenology: flowering.

U.S.A., Montana, Valley County: Glasgow Base Ponds, W of Mont Hwy 24, ca 4.5 air mi W of Porcupine Creek, ca 3.5 air mi NW of St. Marie; ca 18 air mi N of Glasgow.
Moist grasslands surrounding pond with willows, Russian olive, and snowberry thickets. Phenology: flowering.

U.S.A., Montana, Valley County: Hell Creek, ca 4 air mi SSE of Johnnys Hill, ca 20 air mi SW of Opheim; ca 44 air mi NE of Glasgow.
Riparian coulee bottom. Phenology: flowering.

U.S.A., Montana, Phillips County: Milk River Dodson Dam Unit Wildlife Management Area: ca 3.5 air mi NW of Dodson; ca 21 air mi WNW of Malta.
Wetlands and thickets. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: Beaver Creek and DHS Creek near their confluence, ca 3.5 air mi E of Black Cow Reservoir, ca 48 air mi ENE of Zortman; ca 24 air mi SE of Malta.
Steep silty stream banks. Phenology: flowering.

U.S.A., Montana, Phillips County: Bowdoin National Wildlife Refuge: along Refuge Tour Road, near Teal Pond Complex, ca 5 air mi W of Beaver Creek, ca 15 air mi WSW of Saco; ca 11 air mi ENE of Malta.
Wetland areas around ponds. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: Charles M. Russell National Wildlife Refuge: Manning Bottoms along Rock Creek, ca 10 air mi E of Fred Robinson Bridge, ca 21.5 air mi S of Zortman; ca 60 air mi SW of Malta.
Floodplain with some groves of willows and cottonwoods on silty soil. Phenology: flowering.

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: Cook Mountain Hiking and Riding Area: in the vicinity of Cliff Spring and areas SE, W of Forest Road 4772, ca 9 air mi NE of Ashland.
Draw dominated by boxelder, ponderosa pine, and snowberry. Phenology: flowering & fruiting.
Accession: (unaccessioned), Barcode: USFS0050034

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Mud Turtle Reservoir, N of Forest Road 4432, ca 3 air mi NW of Diamond Butte, ca 25.5 air mi SE of Ashland.
In and at margins of reservoir with Salix, Cirsium, Symphoricarpos, Ribes, and Typha. Phenology: flowering & fruiting.
Accession: (unaccessioned), Barcode: USFS0050502

U.S.A., Wyoming, Albany County: Upper North Platte and Laramie River Drainages: Laramie Plains: Wheatland Reservoir No. 3 along Garrett Road, ca 16.4 air mi NE of Rock River.
Sagebrush, rabbitbrush, and mixed grasses around reservoir. Phenology: flowering.

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: Cow Creek Reservoir ca 6 air mi W of Fort Howes Work Center, ca 25 ai mi S of Ashland.
Banks of reservoir, adjacent slopes, and dam. Sheet 2 of 2 Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Basins and Mountains of Southwest Wyoming: Seedskadee National Wildlife Refuge: ca 30 air mi NW of Green River; ca 2.3 road mi S of Headquarters along irrigation ditch.
41.9041° N, 109.8277° W; uncertainty .5 mi., Digital Map
Irrigation ditch for wetland ponds. Phenology: flowering & fruiting.

U.S.A., Wyoming, Goshen County: Rawhide Creek ca 4 mi NE of Lingle.
42° 10.5' N, 104° 16.9' W; unknown, , Specimen Label
Stream bank, with Mentha and Typha. Flowers yellow.

U.S.A., Montana, Beaverhead County: Beaverhead River, ca 1 air mi W of Dillon at Cornell Park.
Disturbed ground in a city park along a river. Phenology: flowering & fruiting.
1. Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman.

U.S.A., Montana, Madison County: Madison Valley: Eight Mile Ford Fishing Access site, ca 4 air mi S of Ennis, along County Road 36.
Moist to wet meadow along a river and next to a boat access gravel road. Phenology: flowering.
1. Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman.

U.S.A., Wyoming, Sweetwater County: Basins and Mountains of Southwest Wyoming: Linwood Canyon, ca 3 air mi NE of Manila, UT; junction of Henrys Fork and Wyo Hwy 530.
41.0023° N, 109.6661° W; uncertainty 1 mi., Digital Map
Creek drainage in arid desert. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Freezeout Mountains: Petes Gap, ca 6 air mi W of Wyo Hwy 487; ca 10.8 air mi NW of Medicine Bow.
Creek banks and adjacent flatland of birdfoot sage and shadscale. Phenology: flowering & fruiting.

U.S.A., Utah, Daggett County: Southwestern Wyoming and Adjacent Utah: Browns Park: on the south side of Green River.
Birch\Cornus at spring. Phenology: flowering & fruiting.
with Duane Atwood and Lucy Jordan

U.S.A., Utah, Uintah County: Southwestern Wyoming and Adjacent Utah: ca 19 air mi SE of Dutch John; 6.3 mi SW of the Green River on Crouse Creek Road at the head of Crouse Canyon.
T1N R25E S33
Flats at the head of the canyon, big sagebrush, juniper, and Salix in stream. Phenology: flowering & fruiting.
with Duane Atwood and Lucy Jordan

U.S.A., Utah, Daggett County: Southwestern Wyoming and Adjacent Utah: Browns Park: ca 12 air mi E of Dutch John, 0.5 mi west of Browns Park Road on the east side of the Green River.
Muddy flat on river edge. Phenology: flowering & fruiting.
with Duane Atwood and Lucy Jordan

U.S.A., Wyoming, Sweetwater County: Basins and Mountains of Southwest Wyoming: Seedskadee National Wildlife Refuge: ca 27 air mi NW of Green River; 0.8 mi NE of Refuge Headquarters.
41.9143° N, 109.8581° W; uncertainty .75 mi., Digital Map
Dry meadow, prairie, sandy. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Basins and Mountains of Southwest Wyoming: Seedskadee National Wildlife Refuge: ca 27 air mi NW of Green River; 1.3 mi NE of Refuge Headquarters on river access road.
41.9144° N, 109.8627° W; uncertainty .75 mi., Digital Map
Clay streambanks, sometimes river rock, with Carex and Salix. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Basins and Mountains of Southwest Wyoming: Seedskadee National Wildlife Refuge: ca 26 air mi NW of Green River; 2.3 mi S of Refuge Headquarters on through waterfowl viewing gate on north side of river.
Clay streambanks, willows. Phenology: flowering & fruiting.

U.S.A., Wyoming, Uinta County: [location and coordinates withheld]
Wetland, willows. Phenology: flowering & fruiting.

River bottom and wetland, cottonwoods, willows. Phenology: flowering & fruiting.

Willow thickets along the creek. Phenology: flowering & fruiting.

U.S.A., Utah, Daggett County: North Slope Uinta Mountains: Flaming Gorge National Recreation Area: Sheep Creek, ca 4 air mi S of Manila; junction of Forest Road 218 and Utah Hwy 44 on west side of Forest Road.
T2N R19E S12
Creek with willows and Carex. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Northwest side Festo Lake ca 2 mi NW of Wheatland.
42° 4.7' N, 105° 0.1' W; unknown, , GPS reading
Lake shore, with Schoenoplectus acutus and Sonchus. Flowers yellow. Phenology: flowering.

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: ca 9.5 air mi NW of Thermopolis along Wyo Hwy 170.
Along alkali stream and wet bottom. Phenology: flowering & fruiting.
Accession: RM (unaccessioned), Barcode: 930388

U.S.A., Utah, Uintah County: Southwestern Wyoming and Adjacent Utah: Browns Park: Sears Canyon, ca 12.5 air mi SE of Dutch John.
Red sandy soils, sandstone cliffs, juniper/pinyon, pine, cottonwood. Phenology: flowering & fruiting.

U.S.A., Utah, Daggett County: Southwestern Wyoming and Adjacent Utah: Browns Park: Swallow Canyon, ca 16 air mi SE of Dutch John.
River's edge, sandy soils, Salix, Tamarix. Phenology: flowering & fruiting.
with Barbara McNight

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Miracle Mile on North Platte River, ca 1.5 air mi NNE of Kortes Dam.
Along river; willow, cottonwood, and limber pine common. Phenology: flowering.

U.S.A., Wyoming, Natrona County: [location and coordinates withheld]
Along creek; birch, chokecherry, willow, limber pine, and snowberry common. Phenology: flowering & fruiting.

U.S.A., Wyoming, Carbon County: Upper North Platte and Laramie River Drainages: Como Lake S of U.S. Hwy 30-287, ca 9 air mi W of Medicine Bow townsite.
Greasewood flats; alkaline. Phenology: flowering & fruiting.