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RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6879 Timothy W. Chumley Irene Thien 1997 6 28 179 U.S.A. Colorado Fremont [location and coordinates withheld] 1932 1945 Along the open, sandy banks of the stream in pinyon-juniper. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57309 B. E. Nelson 2002 7 11 192 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: ridge between Rough Draw and Sage Creek, SE of Popham Bench Mark, ca 22 air mi SW of Upton; ca 38 air mi W of Newcastle. -104.8923 43.8517 1 1384 1420 Bottom of large wash. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57321 B. E. Nelson 2002 7 11 192 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Forest Road 924 at Lodgepole Creek, ca 33 air mi W of Newcastle; ca 24 air mi SW of Upton. -104.8704 43.7992 1 1332 Flats above the stream channel. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57952 B. E. Nelson Peter Ebertowski 2002 8 13 225 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: along Sand Creek above and below confluence with Coal Draw, ca 20 air mi NW of Bill; ca 46 air mi NNW of Douglas. -105.5892 43.3921 1 1466 1475 Sandy slopes, banks, and flats along stream channel. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57996 B. E. Nelson Peter Ebertowski 2002 8 14 226 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: along the Cheyenne River from Sheep Creek down stream ca 1 mi, ca 22 air mi NE of Bill; ca 54 air mi NNE of Douglas. -104.9508 43.4562 1 1307 Banks along the river. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1001 Peter J. Ebertowski 2002 7 3 184 U.S.A. Wyoming Niobrara Thunder Basin National Grassland and Vicinity: tributary of Mule Creek, 6.5 mi SE of Mule Creek Junction on U.S. Hwy 18, ca 36 air mi S of Newcastle; ca 42 air mi NNE of Lusk. -104.1307 43.3193 1219 1250 Side of road. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1094 Peter J. Ebertowski 2002 7 3 184 U.S.A. Wyoming Niobrara 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. -104.3171 43.0966 1 1295 1378 Rocky slopes with little bluestem. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1155 Peter J. Ebertowski 2002 7 5 186 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: broad gully SE of Cheyenne River on Clareton or County Road 7A, ca 37 air mi SE of Wright; ca 44 air mi SW of Newcastle. -104.9103 43.4876 1 1304 1341 Broad grassy gully. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1181 Peter J. Ebertowski 2002 7 5 186 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: tributary S of Keyton Creek on Rochelle Hills or Forest Road 933, ca 26 air mi SE of Wright, ca 23.5 air mi NNE of Bill. -105.0899 43.5443 1 1463 1530 Rocky soil in ravine with patches of ponderosa pine. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1216 Peter J. Ebertowski 2002 7 5 186 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: right of way on Wyo Hwy 450, ca 29 air mi ESE of Wright; ca 39 air mi ENE of Newcastle. -104.9303 43.6576 1 1323 1341 Roadside in sagebrush/grassland. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1341 Peter J. Ebertowski 2002 7 7 188 U.S.A. Wyoming Crook Thunder Basin National Grassland and Vicinity: right of way on County Road 68, ca 16.5 air mi ENE of Weston; ca 37 air mi NE of Gillette. -105.0152 44.6586 1 1243 1250 Side of road. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1467 Peter J. Ebertowski 2002 7 10 191 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: Black Thunder Creek on Keeline or Forest Road 930, ca 20 air mi E of Wright; ca 43 air mi SSE of Gillette. -105.0899 43.7426 1 1359 1365 Creek bed. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1574 Peter J. Ebertowski 2002 7 11 192 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: Cheyenne River Draw on County Road 31, ca 27 air mi NNE of Glenrock; ca 36 air mi NNW of Douglas. -105.6882 43.221 1 1567 1579 Sagebrush/grassland. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2113 Peter J. Ebertowski 2002 7 24 205 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Lodgepole Creek on Wyo Hwy 116, ca 30 air mi W of Newcastle; ca 17 air mi SSW of Upton. -104.7917 43.8797 1 1304 1310 Roadside adjacent to sagebrush/grassland. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2132 Peter J. Ebertowski 2002 7 24 205 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Turner Creek on Forest Road 914, ca 11.5 air mi ESE of Upton; ca 16 air mi NW of Newcastle. -104.4298 44.0201 1 1320 1332 Creek bank. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2666 Peter J. Ebertowski 2002 8 5 217 U.S.A. Wyoming Converse 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. -105.7278 43.3065 1 1582 1597 Grassy creek bottom. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2687 Peter J. Ebertowski 2002 8 7 219 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Lodgepole Creek on Wyo Hwy 116, ca 30 air mi W of Newcastle; ca 17 air mi SSW of Upton. -104.7907 43.7851 1 1301 1314 Creek bank. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2806 Peter J. Ebertowski 2002 8 11 223 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Skull Creek on U.S. Hwy 16, ca 8 air mi NW of Newcastle; ca 18.5 air mi SE of Upton. -104.3494 43.9218 1 1271 1277 Creek bed. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2922 Peter J. Ebertowski B. E. Nelson 2002 8 14 226 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: Cheyenne River ca 0.5 mi E and downstream of Meadow Creek, ca 19 air mi NE of Bill; ca 33 air mi SE of Wright. -105.0107 43.4275 1 1304 1329 Stream bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2962 Peter J. Ebertowski 2002 8 15 227 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: along Lodgepole Creek immediately below its confluence with Hay Creek, on Wyo Hwy 450, ca 24 air mi WSW of Newcastle; ca 27 air mi S of Upton. -104.671 43.7001 1 1265 1280 Low bank of creek. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3036 Peter J. Ebertowski 2002 8 16 228 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: North Fork Lone Tree Creek on Grieves or County Road 5, ca 19 air mi WSW of Newcastle; ca 24 air mi S of Upton. -104.5513 43.7426 1 1262 1268 Creek bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3053 Peter J. Ebertowski 2002 8 16 228 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Beaver Creek at lower end of Sixmile Basin on dirt road ca 0.7 air mi N of Wyo Hwy 450, ca 8.5 air mi WSW of Newcastle; ca 23 air mi SSE of Upton. -104.3917 43.7992 1 1189 Creek bank with willow and grasses. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3146 Peter J. Ebertowski 2002 8 18 230 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: playa and grassland ca 1.5 air mi N of North Prong Little Thunder Creek on County Road 89, ca 8 air mi E of Wright; ca 38 air mi SSE of Gillette. -105.3292 43.7426 1 1439 1448 Depressions above playa. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3175 Peter J. Ebertowski 2002 8 18 230 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: Cabin Canyon on dirt road ca 0.7 air mi NW of Bishop Road, ca 20 air mi SE of Gillette; ca 17 air mi SW of Moorcroft. -105.214 44.0902 1 1335 1365 Grassy creek bank with cottonwoods and Rocky Mountain juniper. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3254 Peter J. Ebertowski 2002 8 19 231 U.S.A. Wyoming Campbell 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. -105.1896 43.6434 1 1408 1426 Wide flat creek bank dominated by Spartina and Cirsium. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3291 Peter J. Ebertowski 2002 8 20 232 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: along Coal Creek and one of its tributaries ca 2 air mi WSW of Coal Creek's confluence with Little Powder River, ca 24 air mi ENE of Gillette; ca 31 air mi NW of Moorcroft. -105.3393 44.6145 1 1182 1207 Creek floodplain, stony soil. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3505 Peter J. Ebertowski 2002 8 26 238 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: along Piney Creek off of Piney Canyon or County Road 17, ca 25 air mi SE of Wright; ca 27 air mi NNE of Bill. -105.05 43.5868 1 1396 1414 Creek bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3553 Peter J. Ebertowski 2002 8 30 242 U.S.A. Wyoming Niobrara Thunder Basin National Grassland and Vicinity: Sage Creek on County Road 64, ca 14 air mi NNE of Lusk; ca 19 air mi NE of Manville. -104.3376 42.944 1347 Creek bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 802 Peter J. Ebertowski 2002 6 28 179 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: tributary of Piney Creek on Piney Creek or County Road 17, ca 25 air mi ESE of Wright; ca 43 air mi WSW of Newcastle. -105.03 43.6151 1 1365 1371 Grassland with patches of sparser vegetation on stony soil. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5537 Peter J. Ebertowski 2003 6 27 178 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: Belle Fourche River off Hilight or County Road 52, ca 16 air mi N of Wright; ca 22 air mi S of Gillette. -105.3949 43.978 1387 1408 Riverbank. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6206 Peter J. Ebertowski 2003 7 7 188 U.S.A. Wyoming Weston 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. -104.3896 44.0481 1396 1414 Around stock tank. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6302 Peter J. Ebertowski 2003 7 9 190 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Blacktail Creek on U.S. Hwy 85, ca 9.5 air mi S of Newcastle; ca 23 air mi N of Mule Creek Junction. -104.1923 43.7001 1189 1204 Steeply sloped creek bank Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6533 Peter J. Ebertowski 2003 7 11 192 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: Well Creek, on Stewart Road, ca 10 air mi WNW of Moorcroft; ca 18 air mi E of Gillette. -105.1557 44.314 1304 1317 Sagebrush grassland. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6664 Peter J. Ebertowski 2003 7 13 194 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: tributary W of South Beaver Creek, on Upton-Fairview or County Road 59, ca 20 air mi W of Newcastle; ca 19 air mi S of Upton. -104.6311 43.8134 1304 1341 Grassland, Stipa comata and Carex filifolia abundant. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6807 Peter J. Ebertowski 2003 7 16 197 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: Rochelle Hills N of Wildcat Creek, on two-track road off Rochelle Hills or Forest Road 933, ca 19 air mi SE of Wright; ca 56 air mi SSE of Gillette. -105.1134 44.1464 1493 1536 Rocky slope above spring. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7148 Peter J. Ebertowski 2003 7 25 206 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Fiddler Creek, on County Road 36B, ca 13 air mi S of Upton; ca 19 air mi W of Newcastle. -104.5705 43.9218 1256 1271 Gentle slope near creek, greasewood abundant. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7343 Peter J. Ebertowski 2003 7 29 210 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: grassland N of Little Thunder Creek, on Wyo Hwy 450, ca 28 air mi ESE of Wright; ca 39 air mi WSW of Newcastle. -104.9702 43.6576 1329 1341 Grassy ravine in sagebrush grassland. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7718 Peter J. Ebertowski 2003 8 4 216 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Buffalo Creek, on Watt Road, ca 8 air mi SSE of Moorcroft ca 14 air mi ENE of Upton. -105.033 44.1324 1317 1353 Slope along creek. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7840 Peter J. Ebertowski 2003 8 7 219 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: Little Thunder Creek, on Wyo Hwy 450, ca 18 air mi ESE of Wright; ca 48 air mi WSW of Newcastle. -105.1497 43.6718 1378 1384 Borrow ditch in Sarcobatus and Bouteloua gracilis floodplain. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8054 Peter J. Ebertowski 2003 8 11 223 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: Lake Creek and hills to the E, on Forest Road 1420C, ca 34 air mi SE of Wright; ca 44 air mi NNE of Douglas. -105.0906 43.37 1359 1405 Creek bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8085 Peter J. Ebertowski 2003 8 13 225 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: West Fork Cottonwood Creek, on Avon Road, ca 15 air mi ENE of Gillette; ca 6 air mi N of Rozet. -105.2164 44.3592 1256 1286 Creek bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8170 Peter J. Ebertowski 2003 8 13 225 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: Little Powder River, on Wyo Hwy 59, ca 11 air mi N of Gillette; ca 30 air mi NW of Moorcroft. -105.4594 44.4498 1243 1317 Stream bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8299 Peter J. Ebertowski 2003 8 17 229 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Black Thunder Creek, on Cheyenne River or County Road 54, ca 31 air mi SW of Newcastle; ca 40 air mi ESE of Wright. -104.7308 43.5726 1250 Creek bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8406 Peter J. Ebertowski 2003 8 19 231 U.S.A. Wyoming Crook Thunder Basin National Grassland and Vicinity: Miller Creek, on County Road 68, ca 8 air mi N of Moorcroft; ca 28 air mi E of Gillette. -104.9532 44.3743 1268 Creek bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8413 Peter J. Ebertowski 2003 8 19 231 U.S.A. Wyoming Crook Thunder Basin National Grassland and Vicinity: Little Missouri River, on County Road 200, ca 32 air mi N of Moorcroft; ca 35 air mi NW of Sundance. -104.9257 44.7243 1173 Steeply sloped river bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8479 Peter J. Ebertowski 2003 8 21 233 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: scoria hills SE of Logan Draw, on Forest Road 1416, ca 23 air mi SE of Wright; ca 49 air mi N of Douglas. -105.3103 43.4562 1420 1448 Ravine floor with Sporobolus airoides. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8494 Peter J. Ebertowski 2003 8 22 234 U.S.A. Wyoming Converse Thunder Basin National Grassland and Vicinity: Antelope Creek, ca 0.5 mi W of its confluence with Wildcat Creek, on Forest Road 949, ca 28 air mi SE of Wright; ca 51 air mi NNE of Douglas. -105.1106 43.4418 1317 1341 Stream bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8580 Peter J. Ebertowski 2003 8 24 236 U.S.A. Wyoming Weston Thunder Basin National Grassland and Vicinity: Deep Creek, on Elliott or County Road 8, ca 21 air mi W of Newcastle; ca 22 air mi S of Upton. -104.651 43.7709 1292 1298 Creek bank. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8617 Peter J. Ebertowski 2003 8 25 237 U.S.A. Wyoming Campbell Thunder Basin National Grassland and Vicinity: reservoirs between Weston and Little Powder River, on Forest Road 908, ca 27 air mi NNE of Gillette; ca 32 air mi NW of Moorcroft. -105.319 44.6439 1128 1146 Area of silver sagebrush and crested wheatgrass around reservoir. Phenology: fruiting. RM RM 913389 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 40774 Erwin F. Evert 2004 6 11 163 U.S.A. Wyoming Big Horn Bighorn Basin: along Dry Creek 0-1/3 mi E of Wyo Hwy 32, 0.5 mi N of U.S. Hwy 14. 1301 Weedy riparian area with Salix exigua, Elaeagnus angustifolia, Sporobolus airoides, and in wetter areas Typha latifolia. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 20990 Erwin F. Evert 1991 6 19 170 U.S.A. Idaho Fremont Snake River Plains: sand dunes N and E of Egin Lakes, ca 8 mi W of St. Anthony. -111.8475 43.964 1463 Wet sand along lake shore with Carex lanuginosa and Eleocharis palustris. RM RM 779886 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 22639 Erwin F. Evert 1992 6 10 162 U.S.A. Montana Carbon [location and coordinates withheld] 1349 Disturbed weedy area adjacent to springs under Salix amygdaloides with Rosa acicularis, Cynoglossum officinale, and Poa pratensis. Phenology: flowering. RM RM 780341 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 26674 Erwin F. Evert 1994 6 5 156 U.S.A. Montana Carbon Shupak Pond, ca 6 mi NNW of Belfry. -109.0364 45.2262 1189 Wet soil along edge of pond and drainage ditch with Juncus balticus, Salix exigua, Triglochin concinnum, and Typha latifolia. Phenology: flowering. RM RM 783785 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 29728 Erwin F. Evert 1995 7 6 187 U.S.A. Montana Sweet Grass [location and coordinates withheld] 1158 Disturbed, weedy riparian area and field with Bromus tectorum, Medicago lupulina, and Poa pratensis. Phenology: flowering. RM RM 818307 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 32917 Erwin F. Evert 1997 6 11 162 U.S.A. Montana Carbon Along Monahan Road just N of intersection with County Road 421, 1.3 mi W of Joliet. -108.9969 45.487 1 1189 Disturbed road shoulder with Euphorbia serpyllifolia and Helianthus annuus. Phenology: flowering & fruiting. RM RM 818622 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33218 Erwin F. Evert 1997 6 22 173 U.S.A. Wyoming Hot Springs Owl Creek Mountains: lower end of the Wind River Canyon, along U.S. Hwy 20/Wyo Hwy 789, 4 mi S of Thermopolis. -108.2058 43.5908 1 1350 Weedy, rocky riparian area along the river with Bromus inermis, Asclepias speciosa, and Cirsium arvense. Phenology: flowering & fruiting. RM RM 818651 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33249 Erwin F. Evert 1997 6 22 173 U.S.A. Wyoming Hot Springs Bighorn Basin: Public Fishing Access Site along the west side of the Big Horn River, ca 4 mi N of Thermopolis. 1295 Weedy, riparian area with Elaeagnus angustifolia, Bromus tectorum, Sporobolus airoides, and Alyssum desertorum. Phenology: flowering & fruiting. RM RM 819728 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33799 Erwin F. Evert 1997 7 17 198 U.S.A. Wyoming Park Absaroka Mountains: North Fork Shoshone River Drainage: Shoshone National Forest: ridge 1/3 mi W of Kitty Creek and 1/3 mi S of U.S. Hwy 14, 16, and 20; directly in back of cabins. 2073 A colony of ca 150 stems in open, rocky area with Gayophytum diffusum, Elymus spicatus, and Medicago lupulina. Phenology: fruiting. RM RM 819925 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 34536 Erwin F. Evert 1997 8 5 217 U.S.A. Montana Park Yellowstone Valley: Springdale Bridge Public Boating Access, along the south side of the Yellowstone River, 18 mi E of Livingston. 1286 Riparian community in moist sandy soil with Populus angustifolia, Salix lasiandra var. caudata, and Spartina pectinata. Phenology: flowering & fruiting. RM RM 819920 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 34560 Erwin F. Evert 1997 8 5 217 U.S.A. Montana Sweet Grass Grey Bear Campground/Boating Access, along the south side of the Yellowstone River, 6 mi SW of Big Timber. 1250 Disturbed riparian community on sandy soil with Populus angustifolia, Cornus sericea, Chenopodium botrys, and Spartina pectinata. Phenology: flowering & fruiting. RM RM 819880 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 34746 Erwin F. Evert 1997 8 11 223 U.S.A. Wyoming Park Bighorn Basin: Cody city reservoir S of town. 1554 Disturbed areas along paths adjacent to reservoir with Kochia scoparia, Amaranthus retroflexus, Convolvulus arvensis, and Euphorbia glyptosperma. Phenology: flowering & fruiting. RM RM 820112 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 34926 Erwin F. Evert 1998 6 11 162 U.S.A. Wyoming Hot Springs Bighorn Basin: ca 1/4 - 1/2 mi N of Little Sand Draw Road, ca 15 mi NW of Thermopolis. -108.2594 43.8211 1 1402 Sagebrush-grassland with Carex filifolia, Stipa comata, and Delphinium geyeri. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5267 Jeanette Flaig 2004 7 5 187 U.S.A. Colorado Rio Grande Eastern San Juan Mountains: Rio Grande National Forest: Limekiln, Forest Road 268, Nicomodes Gully, 9 air mi S of Del Norte. -106.346 37.605 2955 Summit of rocky knob descending on east-facing slope into ephemeral drainage. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6234 Jeanette Flaig 2004 7 18 200 U.S.A. Colorado Saguache [location and coordinates withheld] 2324 Irrigation canal. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 79267 Ronald L. Hartman 2004 7 8 190 U.S.A. Colorado Conejos Eastern San Juan Mountains: Rio Grande National Forest: 3-3.5 air mi S of Fox Creek, mountain immediately to E of Bighorn Creek and Forest Road 28. -106.1863 37.0327 2581 2602 Grassy slope with mixed conifers above. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 12228 Erin Foley 2004 8 27 240 U.S.A. Colorado Grand Middle Park: Wolford Mountain Reservoir, ca 7.5 air mi NNW of Kremmling and ca 3.5 air mi NW of Wolford Mountain. -106.415 40.1673 2286 Sedimentary slopes and drainages adjacent to reservoir. Phenology: flowering & fruiting. RM USFS 490987 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 79 Arthur D. Read 1912 7 21 203 U.S.A. Arizona Cochise Tusayan National Forest. In wet draw. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1420 James F. Fowler C. L. May 1993 6 21 172 U.S.A. Colorado Moffat Dinosaur National Monument: Limestone Hanging Garden, Limestone Canyon. 1783 Hanging garden. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 660 James F. Fowler C. L. May and Jon Hak 1992 5 30 151 U.S.A. Utah Washington Zion National Park: upper Emerald Hanging Garden, Zion Canyon. 1433 Hanging garden. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3330a Laura Welp 1994 8 8 220 U.S.A. Wyoming Carbon Great Divide Basin Area: Great Divide Basin: Little Camp Creek, ca 3 air mi NE of Bairoil; ca 5 air mi SE of Whiskey Peak. -107.5069 42.2533 2067 2085 Small dammed creek on north-facing slope in sagebrush hills; graminoids dominant; dry fine rocky soil. Phenology: fruiting. RM RM 665655 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1509 Amy J. Roderick 1997 6 30 181 U.S.A. Wyoming Carbon Upper North Platte and Laramie River Drainages: E of Wyo Hwy 487, ca 14.2 air mi N of Medicine Bow townsite. -106.1893 42.1085 2103 Grassy, gravelly roadside. Phenology: flowering. RM RM 665654 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1584 Amy J. Roderick 1997 7 3 184 U.S.A. Wyoming Fremont Upper North Platte and Laramie River Drainages: Granite Mountains: rock outcrop S of Agate Flats, ca 12.5 air mi NE of Jeffrey City. -107.6124 42.5695 1908 1969 Grassy draw. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6080 Brian F. Jacobs U.S.A. New Mexico Los Alamos Jemez Mountains: along NM Hwy 501 (Backgate Road) at Ski Hill Road turnoff, SW of Los Alamos. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5800 Joy Handley 2000 6 21 173 U.S.A. Idaho Washington Payette National Forest and Vicinity: Weiser River Valley: along west bank of Weiser River, just S of Little Weiser River, ca 2 air mi SSW of Cambridge; ca 6 air mi NNE of Midvale. -116.6846 44.5494 792 Riverside and roadside in shrub and grass dominated canyon. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7467 Joy Handley Erin Peters 2000 8 1 214 U.S.A. Idaho Washington Payette National Forest and Vicinity: Weiser River Valley: Burton Lane ditch just S of U.S. Hwy 95, ca 1 air mi SE of Cambridge; ca 16 air mi SW of Council. -116.6644 44.5639 807 Weedy roadside irrigation ditch. Phenology: fruiting. RM RM 772736 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10902 Kevin J. Taylor 1998 8 18 230 U.S.A. Colorado Gunnison Northern Gunnison Basin: ca 2 air mi WNW of Pittsburg. -107.101 38.9632 1 3262 3353 Subalpine avalanche meadow. Phenology: flowering. RM RM 772738 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8437 Kevin J. Taylor 1998 7 14 195 U.S.A. Colorado Delta Northern Gunnison Basin: ca 5 1/4 air mi S of Paonia. -107.5825 38.7929 1 2164 2195 Along creek and oak forest. Phenology: flowering. RM RM 772737 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9486 Kevin J. Taylor 1998 7 25 206 U.S.A. Colorado Gunnison Northern Gunnison Basin: ca 1 air mi E of Parlin. -106.7023 38.5069 1 2500 Drainage and irrigation ditch; sagebrush, cottonwood, and Salix. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 255A Gwen Kittel 1989 7 27 208 U.S.A. Colorado Larimer Riparian Plants of the Cache la Poudre River: ca 1 1/4 mi W of Teds Place on Colo Hwy 14. 1585 Riverbank and old levee with Populus angustifolia, Acer negundo, Betula occidentalis. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1462 Grace M. Kostel 2004 6 4 156 U.S.A. South Dakota Fall River Buffalo Gap National Grassland and Vicinity: 4 mi N of Smithwick on County Road 2. -103.225833 43.3655 914 In sand soils of roadside and road ditch. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1517 Grace M. Kostel 2004 6 5 157 U.S.A. South Dakota Fall River Buffalo Gap National Grassland and Vicinity: ca 10.5 air mi SW of Oelrichs on County Road 4. -103.345333 43.058167 929 945 In gravel and sand of roadside. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1785 Grace M. Kostel 2004 6 8 160 U.S.A. Nebraska Sioux Oglala National Grassland and Vicinity: ca 11 air mi NW of Crawford and 0.5 mi W of Hudson-Meng Bonebed Trail, near Whitehead Creek. -103.588 42.850833 1158 1189 In drainage and slopes leading to creek in heavy white clay soil. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2223 Grace M. Kostel 2004 6 14 166 U.S.A. Nebraska Sioux Oglala National Grassland and Vicinity: ca 27.5-28 air mi NW of Crawford. -103.8765 42.895167 1173 1204 On ridge of rockand sand. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2789 Grace M. Kostel 2004 6 25 177 U.S.A. South Dakota Custer 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. -102.890167 43.6765 884 899 In prarie dog town with soils of silt and clay. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2846 Grace M. Kostel 2004 6 25 177 U.S.A. South Dakota Custer Buffalo Gap National Grassland and Vicinity: ca 20 mi SSE of Hermosa, next to the Cheyenne River. -103.056 43.567167 838 In sandy soil on river banks. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2958 Grace M. Kostel 2004 6 28 180 U.S.A. South Dakota Fall River Buffalo Gap National Grassland and Vicinity: ca 5 air mi. N of U.S. Hwy 18 in large side drainage of Moss Agate Creek; left of School Section follow trail across Moss Agate Creek and left up ridge in a SW direction, 0.75 mi from creek bottom. -104.0269 43.3361 975 Soils are gravelly, rocky at top of slopes and grade into silt and clay with clay alkali at creek bottom. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2961 Grace M. Kostel 2004 6 28 180 U.S.A. South Dakota Fall River Buffalo Gap National Grassland and Vicinity: ca 5 air mi. N of U.S. Hwy 18 in large side drainage of Moss Agate Creek; left of School Section follow trail across Moss Agate Creek and left up ridge in a SW direction, 0.75 mi from creek bottom. -104.0269 43.3361 975 Soils are gravelly, rocky at top of slopes and grade into silt and clay with clay alkali at creek bottom. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3283 Grace M. Kostel 2004 7 2 184 U.S.A. South Dakota Custer Buffalo Gap National Grassland and Vicinity: ca 14.5-15 air mi SE of Hermosa and 2.4 mi N of County Road 18. -103.005 43.702333 853 945 Butte rock slopes and top. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3332 Grace M. Kostel 2004 7 2 184 U.S.A. South Dakota Fall River Buffalo Gap National Grassland and Vicinity: ca 10-10.5 air mi WNW of Edgemont; Moss Agate Creek. -104.013833 43.350833 1128 1143 In side drainage of creek. Side slopes of rock and gravel. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3454 Grace M. Kostel 2004 7 6 188 U.S.A. Nebraska Dawes Oglala National Grassland and Vicinity: ca 6.5-7 mi NNW of Crawford in Sand Creek. -103.445 42.788167 1097 Populous deltoides - Salix plant community with wet, heavy clay soils. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3638 Grace M. Kostel 2004 7 15 197 U.S.A. Nebraska Sioux Oglala National Grassland and Vicinity: ca 18 air mi NW of Crawford and 1/2-3/4 mi N of Orella Road in Whitehead Creek. -103.633833 42.891667 1128 1143 Soils are silty and moist. Associated plants growing in creek floor are Salix spp., Prunus virginiana and Ribes spp. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3714 Grace M. Kostel 2004 7 15 197 U.S.A. Nebraska Sioux Oglala National Grassland and Vicinity: ca 12.5-13 air mi NW of Crawford. -103.6265 42.803 1371 1463 On rocky ridge and side slopes. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4291 Grace M. Kostel Steve Popovich 2004 8 2 215 U.S.A. Nebraska Sioux Oglala National Grassland and Vicinity: ca 13.5 -14 air mi NW of Crawford at Hudson-Meng Bison Bonebed. -103.5852 42.8346 1280 At spring fed pond. Phenology: fruiting. RM USFS 490989 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. Frank B. McMurry 1937 7 16 197 U.S.A. New Mexico Catron Apache National Forest: 1 mi S of boundary fence, Luna Alpine Road. -109.00329 33.80949 3 2073 South slope; small meadow; silt loam; scarce with weeds growing in gully. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7842 Grace M. Kostel 2005 6 27 178 U.S.A. South Dakota Pennington Buffalo Gap National Grassland and Vicinity: ca 6.5 air mi SSE of Wall and 0.5 mi due E of SD Hwy 240. -102.232467 43.8981 914 Edge of badlands "wall" on ridge edge abruptly dissected into drainages leading to badlands floodplain; soils are silty loam to clay loam. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8318 Grace M. Kostel 2005 7 10 191 U.S.A. South Dakota Jackson Buffalo Gap National Grassland and Vicinity: ca 6-6.5 air mi ESE of Cottonwood in South Fork Bad River. -101.774833 43.941783 708 Soils are silty clay. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8708 Grace M. Kostel 2005 7 16 197 U.S.A. South Dakota Pennington Buffalo Gap National Grassland and Vicinity: ca 14 air mi NE of Hermosa. -102.953833 43.933633 892 In prairie stream drainage cut, soils are clay loam and alkaline. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8918 Grace M. Kostel 2005 7 20 201 U.S.A. South Dakota Custer Buffalo Gap National Grassland and Vicinity: ca 19-19.5 air mi E of Fairburn, Battle Creek. -102.817783 43.6894 800 In and along shores of creek, soils are wet clay and clay with gravel sediments. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9097 Grace M. Kostel 2005 7 22 203 U.S.A. South Dakota Jackson Buffalo Gap National Grassland and Vicinity: ca 2 air mi NE of Cactus Flats in Big Buffalo Creek. -101.86965 43.85625 750 Wooded draw exclosed from grazing, soils are loam and loamy clay. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9689 Grace M. Kostel 2005 8 9 221 U.S.A. South Dakota Pennington Buffalo Gap National Grassland and Vicinity: ca 2.5 air mi due E of Wall. -102.186667 43.994683 823 On an abandoned roadway in small stream cut, loam soil. Phenology: fruiting. RM RM 949086 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6657 Jill E. Larson James Lucero 2006 6 15 166 U.S.A. New Mexico Taos Carson National Forest and Vicinity: Sangre de Cristo Range: Pueblo de Taos Indian Reservation: pasture area W of road to Pueblo, ca 0.5 mi W of Taos Pueblo. -105.5543 36.4355 2149 Open grassland/wetland with Carex lanuginosa, Equisetum laevigatum, Juncus balticus and groups of Salix and Typha in the moistest areas. Phenology: flowering. RM RM 949085 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7570 Jill E. Larson 2006 7 2 183 U.S.A. New Mexico Taos Carson National Forest and Vicinity: Sangre de Cristo Range: West Fork Angostura Trail 9A to Forest Road 89, ca 0.5 air mi SW of The Knob, ca 3 air mi S of Tres Ritos, and ca 3 air mi W of Angostura. -105.5302 36.0998 2865 3109 Highway right of way. Phenology: flowering. RM RM 800851 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 52324 B. E. Nelson Luanne Lum 2001 6 5 156 U.S.A. Wyoming Big Horn Bighorn Basin: near the head of South Fork Dorsey Creek on Dorsey Creek or BLM Road 1103, ca 4 air SE of Sheep Mountain, ca 8 air mi SSW of Otto; ca 17 air mi WSW of Basin. -108.3594 44.3062 1 1378 1396 Bottom of gully. Phenology: buds. RM RM 800850 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 52470 B. E. Nelson Luanne Lum 2001 6 9 160 U.S.A. Wyoming Park Bighorn Basin: along State Ditch just below Wyo Hwy 120, ca 1 mi E of Big Sand Coulee, ca 5.5 air mi NE of Clark; ca 21 air mi NW of Powell. -109.0568 44.9499 1265 Ditch bank and adjacent flats. Phenology: buds. RM RM 800849 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 52627 B. E. Nelson Luanne Lum 2001 6 10 161 U.S.A. Wyoming Big Horn Bighorn Basin: along Lane 42 ca 3 air mi N of Sheep Mountain and ca 0.3 mi S of the Greybull River, ca 4 air mi S of Burlington; ca 19.5 air mi W of Basin. -108.4199 44.3786 1 1341 Roadside on wooded clay flats with irrigation ditch. Phenology: flowering. RM RM 800848 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 52699 B. E. Nelson 2001 6 12 163 U.S.A. Wyoming Washakie Bighorn Basin: along Fifteen Mile or BLM Road 1429, ca 1 air mi W of North Fork Fifteen Mile Creek, ca 14.5 air mi NW of Worland. -108.1993 44.1167 1 1317 1323 Dry flats adjacent to reservoir. Phenology: flowering. RM RM 800847 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 52759 B. E. Nelson 2001 6 12 163 U.S.A. Wyoming Washakie Bighorn Basin: Flume Reservoir on a tributary of Wildcat Gulch, along BLM Road 1406, ca 4 air mi SE of Neiber; ca 9 air mi SSW of Worland. -108.0062 43.899 1 1323 1335 Clay flats around the reservoir. Phenology: flowering. RM RM 800861 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 155 Luanne Lum 2001 6 18 169 U.S.A. Wyoming Hot Springs Bighorn Basin: along County Road 26, ca 5 air mi N of Thermopolis. -108.2058 43.706 1 1341 1371 Roadside ditch. Phenology: flowering. RM RM 800860 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 204 Luanne Lum 2001 6 20 171 U.S.A. Wyoming Washakie Bighorn Basin: along County Road 54 at Brokenback Creek, ca 6.3 air mi NW of Ten Sleep and ca 26.5 air mi ENE of Worland. -107.5536 44.103 1 1341 1349 Acer and Salix with rose and grasses in the upland areas transitioning to sagebrush with grasses and cacti. Phenology: flowering. RM RM 800859 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 230 Luanne Lum 2001 6 21 172 U.S.A. Wyoming Big Horn Bighorn Basin: along Wyo Hwy 31 E of Nowood River, ca 13 air mi ESE of Manderson and ca 8 air mi WSW of Hyattville. -107.734 44.2194 1 1250 1274 Cattail marsh with Populus. Phenology: flowering. RM RM 800858 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 344 Luanne Lum 2001 6 25 176 U.S.A. Wyoming Washakie Bighorn Basin: along Wyo Hwy 433, ca 9 air mi NNW of Worland on Bighorn Canal. -107.9661 44.0433 1 1243 Sagebrush along canal. Phenology: flowering. RM RM 800857 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 375 Luanne Lum 2001 6 27 178 U.S.A. Wyoming Washakie Bighorn Basin: along Mobile or BLM Road 1401, ca 5 air mi SE of Worland. -107.8781 43.9712 1 1329 1335 Sagebrush on sandy soil. Phenology: flowering. RM RM 800856 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 385 Luanne Lum 2001 6 27 178 U.S.A. Wyoming Washakie Bighorn Basin: along BLM Road at Little Slick Creek, ca 2.5 air mi SE of Worland. -107.8983 44.0004 1 1275 1280 Riparian. Phenology: flowering. RM RM 800855 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 413 Luanne Lum 2001 6 29 180 U.S.A. Wyoming Big Horn Bighorn Basin: along Rairden Lane, ca 1 air mi W of Rairden and ca 12 air mi N of Worland. -107.9357 44.1905 1 1219 Roadside ditch. Phenology: flowering. RM RM 800854 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 535 Luanne Lum Michelle Wilson 2001 7 3 184 U.S.A. Wyoming Washakie Bighorn Basin: along Nowood River, ca 8 air mi SW of Hyattville. -107.6755 44.1608 1 1270 Riparian on sandy soil. Phenology: flowering. RM RM 800853 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 612 Luanne Lum Michelle Wilson 2001 7 6 187 U.S.A. Wyoming Big Horn Bighorn Basin: SE of Wardel Reservoir dam, ca 13 air mi WSW of Basin and ca 16 air mi WSW of Greybull. -108.2989 44.3497 1 1292 1300 Riparian. Phenology: flowering. RM RM 800852 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 673 Luanne Lum 2001 7 9 190 U.S.A. Wyoming Big Horn Bighorn Basin: along Beaver Creek or County Road 258, ca 4.2 air mi NW of Shell and ca 13.5 air mi ENE of Greybull. -107.8125 44.5717 1 1295 Riparian with Salix on sandy soil. Phenology: flowering. RM RM 800862 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 85 Luanne Lum 2001 6 15 166 U.S.A. Wyoming Hot Springs Bighorn Basin: along County Road 4, ca 4 air mi NE of Thermopolis, E of the Big Horn River. -108.1461 43.6916 1 1319 1364 Juniper woodland on sandy soil and rock outcrops. Phenology: flowering. RM RM 804214 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57404 B. E. Nelson 2002 7 14 195 U.S.A. Wyoming Washakie 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. -107.4604 43.6647 1 1731 1768 Roadside. Phenology: flowering. RM RM 804212 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57454 B. E. Nelson 2002 7 14 195 U.S.A. Wyoming Washakie 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. -107.4604 43.6647 1 1664 1676 Slopes below sandstone rimrock in small canyon with chokecherry/skunkbush thickets and narrowleaf cottonwood. Phenology: flowering. RM RM 804213 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57542 B. E. Nelson 2002 7 16 197 U.S.A. Wyoming Park Bighorn Basin: in the vicinity of the confluince of Parker Spring Gulch and Fifteenmile Creek, ca 4 air mi N of Whistle Berry Hill, ca 11.5 air mi ENE of Meeteetse. -108.6418 44.1905 1 1524 1530 Silt/sand or cobble bars and banks along stream channels. Phenology: flowering. RM RM 804179 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57578 B. E. Nelson 2002 7 16 197 U.S.A. Wyoming Park Bighorn Basin: along Fifteenmile Creek at Fifteenmile Creek or BLM Road 1429 crossing, ca 3 air mi W of Dead Indian Hill, ca 14 air mi E of Meeteetse. -108.6015 44.1905 1 1487 Silt/sand or cobble bars, banks of stream channel, and sandy flats with mixed species cottonwood woodland. Phenology: flowering & fruiting. RM RM 804178 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57614 B. E. Nelson 2002 7 16 197 U.S.A. Wyoming Washakie [location and coordinates withheld] 1378 Low, clay flats in an exclosure with several Russian olive trees and cottonwoods. Phenology: flowering. RM RM 804177 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57631 B. E. Nelson 2002 7 18 199 U.S.A. Wyoming Big Horn Bighorn Basin: Montgomery Draw Wetland Protection Project ca 1.5 air mi N of Fivemile Creek, ca 7 air mi SW of Manderson; ca 11.5 air mi S of Basin. -108.077 44.2194 1 1295 Dry reservoir area and areas below the dam. Phenology: flowering & fruiting. RM RM 804175 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57696 B. E. Nelson 2002 7 18 199 U.S.A. Wyoming Big Horn Bighorn Basin: at White Reservoir along White Gulch, ca 0.5 air mi W of Dorsey Creek and ca 1.5 mi S of the Greybull River, ca 4.5 air mi ESE of Otto; ca 7 air mi W of Basin. -108.1778 44.3931 1 1228 Muddy to dry flats adjacent to the reservoir. Phenology: fruiting. RM RM 804174 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57740 B. E. Nelson 2002 7 18 199 U.S.A. Wyoming Big Horn Bighorn Basin: along County Lane 43 and along the Greybull River, ca 2 air mi SE of Otto; ca 10 air mi W of Basin. -108.2384 44.3786 1 1243 1250 Thicket along the road with a seep. Phenology: flowering. RM RM 804176 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57772 B. E. Nelson 2002 7 21 202 U.S.A. Wyoming Washakie Bighorn Basin: Chimney Reservoir between Chimney Springs Draw and Fiscus Gulch, ca 3 air mi SE of Castle Gardents, ca 6 air mi S of Ten Sleep. -107.4719 43.938 1 1475 Dry reservoir bed. Phenology: flowering. RM RM 804173 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57814 B. E. Nelson 2002 7 21 202 U.S.A. Wyoming Washakie Bighorn Basin: along Indian Creek, ca 4--5 air mi E of Big Cedar Ridge and 3--4 air mi W of the Nowood River, ca 13.5 air mi S of Ten Sleep. -107.4402 43.8394 2 1463 1493 Edge and dry upper end of reservoir. Phenology: flowering. RM RM 804172 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57843 B. E. Nelson 2002 7 21 202 U.S.A. Wyoming Washakie Bighorn Basin: just E of Blue Bank or BLM Road 1411 and ca 0.5 air mi W of Bud Kimball Creek, ca 2 air mi NE of Middle Butte, ca 11.5 air mi SSW of Ten Sleep. -107.5322 43.8801 1 1481 Around edge of dry reservoir. Phenology: flowering. RM RM 804195 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57897 B. E. Nelson 2002 7 23 204 U.S.A. Wyoming Big Horn Bighorn Basin: along Nowood River ca 0.5 air mi S of County Road 50, ca 3.5 air mi NW of McDermotts Butte, ca 5.5 air mi E of Manderson; ca 12.5 air mi SE of Basin. -107.855 44.2628 1 1216 1231 River bank thickets. Phenology: flowering. RM RM 804223 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57940 B. E. Nelson 2002 7 23 204 U.S.A. Wyoming Washakie Bighorn Basin: along Lower and Upper Hanover canals at the end of Lane 7, ca 7.5-8 air mi NNE of Worland. -107.8781 44.1171 1 1231 1250 Disturbed flats with Siberian elm, Russian olive, cottonwood, and shrubs. Phenology: flowering. RM RM 804199 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2422 Luanne Lum 2002 6 10 161 U.S.A. Wyoming Big Horn Bighorn Basin: along Lane 42 1/2, ca 5.9 air mi ESE of Otto and ca 10 air mi ESE of Greybull. -108.3796 44.3786 1 1310 Irrigation ditch. Phenology: buds. RM RM 804198 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2527 Luanne Lum 2002 6 12 163 U.S.A. Wyoming Hot Springs Bighorn Basin: along County Road 19, ca 8.5 air mi NNE of Thermopolis at Kirby Creek. -108.1461 43.7348 1 1301 Riparian. Phenology: buds. RM RM 804197 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2754 Luanne Lum 2002 6 16 167 U.S.A. Wyoming Washakie Bighorn Basin: within Worland ca 0.2 air mi E of Wyoming Street at southern edge of agriculture field on Lower Hanover Canal. -107.9387 44.015 1 1240 Irrigation drainage canal. Phenology: flowering. RM RM 804196 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2901 Luanne Lum 2002 6 20 171 U.S.A. Wyoming Big Horn [location and coordinates withheld] 1250 1253 Irrigation ditch. Phenology: flowering. RM RM 804193 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3078 Luanne Lum 2002 6 24 175 U.S.A. Wyoming Washakie Bighorn Basin: along Wyo Hwy 434 E of Nowood River, ca 9 air mi SSE of Ten Sleep. -107.38 43.9113 1 1378 Agricultural ditch. Phenology: flowering. RM RM 804192 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3625 Luanne Lum 2002 7 3 184 U.S.A. Wyoming Washakie Bighorn Basin: along BLM Road 1431 N of Wyo Hwy 431, ca 25.5 air mi W of Worland. -108.4599 44.0133 1 1490 Reservoir and sagebrush. Phenology: flowering. RM RM 804191 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3723 Luanne Lum 2002 7 6 187 U.S.A. Wyoming Big Horn [location and coordinates withheld] 1197 Agricultural ditch. Phenology: flowering. RM RM 804190 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4676 Luanne Lum Michelle Wilson 2002 7 22 203 U.S.A. Wyoming Big Horn Bighorn Basin: along Shoshone River and Wyo Hwy 37, ca 0.5 air mi ENE of Lovell. -108.4604 44.8612 1 1147 Riparian. Phenology: flowering & fruiting. RM RM 804189 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4702 Luanne Lum Michelle Wilson 2002 7 22 203 U.S.A. Wyoming Big Horn Bighorn Basin: along Coon Creek, ca 2 air mi S of Byron. -108.5211 44.7744 1 1219 1222 Riparian. Phenology: flowering. RM RM 804188 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4793 Luanne Lum Michelle Wilson 2002 7 23 204 U.S.A. Wyoming Big Horn Bighorn Basin: along Lane 7 and Sage Creek, ca 1.5 air mi E of Deaver and ca 7.8 air mi WNW of Lovell. -108.5672 44.8933 1 1219 1231 Riparian and sagebrush. Phenology: flowering. RM RM 804187 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4803 Luanne Lum Michelle Wilson 2002 7 23 204 U.S.A. Wyoming Park Bighorn Basin: along County Road -108.6284 44.9075 1 1295 1298 Reservoir. Phenology: flowering. RM RM 804222 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4864 Luanne Lum Michelle Wilson 2002 7 23 204 U.S.A. Wyoming Park Bighorn Basin: along Shoshone River W of Willwood Dam and County Road -108.9058 44.673 1 1344 1371 Riparian. Phenology: flowering. RM RM 804221 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4894 Luanne Lum 2002 7 26 207 U.S.A. Wyoming Washakie Bighorn Basin: E of Little Slick Creek, ca 4.9 air mi ESE of Worland. -107.8781 44.0004 1 1292 Irrigation ditch. Phenology: flowering & fruiting. RM RM 804220 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4948 Luanne Lum 2002 7 29 210 U.S.A. Wyoming Big Horn Bighorn Basin: along Orchard Bench or County Road 1121 and Elk Creek, ca 5 air mi S of Basin. -108.0366 44.3062 1 1189 Mixed riparian and sagebrush. Phenology: flowering. RM RM 804219 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5089 Luanne Lum 2002 7 30 211 U.S.A. Wyoming Park Bighorn Basin: along Dry Creek at U.S. Hwy 14, 16, and 20 crossing, ca 21 air mi ESE of Cody; ca 29.5 air mi WSW of Greybull. -108.6418 44.4655 1 1463 1469 Creekside. Phenology: fruiting. RM RM 804218 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5100 Luanne Lum 2002 7 30 211 U.S.A. Wyoming Washakie Bighorn Basin: on Bighorn Canal W of Wyo Hwy 433, ca 8.6 air mi N of Worland. -107.9387 44.1316 1 1236 Irrigation canal. Phenology: flowering & fruiting. RM RM 804217 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5742 Luanne Lum 2002 8 14 226 U.S.A. Wyoming Hot Springs Bighorn Basin: at Murphy Draw along Wyo Hwy 431 and BLM Road 1302, ca 27.5 air mi W of Worland and ca 21.5 air mi ESE of Meeteetse. -108.5 44.0133 1 1554 1556 Sagebrush on mudstone. Phenology: fruiting. RM RM 804216 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5838 Luanne Lum 2002 8 16 228 U.S.A. Wyoming Hot Springs Bighorn Basin: along Grass Creek and Wyo Hwy 171, ca 25 air mi NW of Thermopolis. -108.52 43.9246 1 1573 1577 Riparian. Phenology: flowering. RM RM 804215 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5854 Luanne Lum 2002 8 17 229 U.S.A. Wyoming Big Horn Bighorn Basin: along Dry Creek and drainage canal, ca 8.5 air mi W of Greybull. -108.2182 44.4944 1 1243 Riparian. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6424 Margarette J. Lyon 1994 7 22 203 U.S.A. Colorado San Miguel San Miguel and Lower Dolores River Drainages: San Miguel River Drainage: The Nature Conservancy Preserve. -108.6944 38.3433 1554 Riparian area with Quercus and Rhus, uplands with Artemisia and Atriplex. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2681 Melanie Arnett 1998 8 7 219 U.S.A. Colorado Gunnison Southern Gunnison Basin: along south side of U.S. Hwy 50, just S of the cemetary, ca 1.6 road mi E of downtown Gunnison. -106.8842 38.536 2347 Roadside. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2733 Melanie Arnett 1998 8 7 219 U.S.A. Colorado Gunnison 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. -106.7569 38.4631 2378 Roadside. Phenology: flowering. RM RM 706770 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9010 Lynn Marie Moore Fallon Judkins and Marie Rambo 1995 8 23 235 U.S.A. Colorado Montezuma [location and coordinates withheld] 1951 1981 Pinyon-juniper, rabbit brush, Atriplex, and roadside weeds on a west face. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1219 Rachel Newton 2005 6 28 179 U.S.A. Wyoming Laramie Wetlands and Adjacent Areas: Bear Creek, ca 9 air mi SSE of Chugwater. -104.7608 41.6359 1694 Moist banks and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1245 Rachel Newton 2005 6 28 179 U.S.A. Wyoming Platte Wetlands and Adjacent Areas: Chugwater Creek, ca 1.5 air mi NE of Chugwater. -104.7996 41.768 1657 Very moist banks and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1802 Rachel Newton 2005 7 10 191 U.S.A. Wyoming Carbon Wetlands and Adjacent Areas: North Platte River, ca 32 air mi NE of Rawlins. -106.8787 42.21 1796 Flooded banks and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1820 Rachel Newton 2005 7 11 192 U.S.A. Wyoming Natrona Wetlands and Adjacent Areas: Pathfinder Reservoir, ca 41 air mi SE of Casper. -107.06 42.5081 1735 Moist banks and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1876 Rachel Newton 2005 7 11 192 U.S.A. Wyoming Carbon Wetlands and Adjacent Areas: confluence of Whiskey Creek and Buckley Reservoir, ca 2 air mi NE of Muddy Gap Junction. -107.4072 42.3809 1883 Dry creek bed. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1915 Rachel Newton 2005 7 14 195 U.S.A. Wyoming Goshen Wetlands and Adjacent Areas: Grayrocks Reservoir, ca 10 air mi NE of Wheatland. -104.7513 42.136 1317 Dry rocky uplands. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1960 Rachel Newton 2005 7 14 195 U.S.A. Wyoming Goshen Wetlands and Adjacent Areas: North Platte River, bordering town of Guernsey. -104.7529 42.2728 1297 Submerged flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1986 Rachel Newton 2005 7 14 195 U.S.A. Wyoming Goshen Wetlands and Adjacent Areas: Sandy Beach, Guernsey Reservoir, ca 5 air mi NW of Guernsey. -104.8053 42.3082 1349 Sandy beach and uplands. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2013 Rachel Newton 2005 7 15 196 U.S.A. Wyoming Goshen Wetlands and Adjacent Areas: North Platte River, ca 23 air mi SE of Guernsey, 2 air mi S of Lingle. -104.3516 42.1059 1226 Flooded banks and moist flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2028 Rachel Newton 2005 7 15 196 U.S.A. Wyoming Niobrara Wetlands and Adjacent Areas: Old Woman Creek, ca 18 air mi N of Lusk. -104.3823 43.0444 1269 Moist creek bed and banks. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2072 Rachel Newton 2005 7 15 196 U.S.A. Wyoming Platte Wetlands and Adjacent Areas: wetlands below Glendo Dam, North Platte River, ca 17 air mi NE of Guernsey. -104.9446 42.4665 1376 Marshy banks. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2452 Rachel Newton 2005 7 25 206 U.S.A. Wyoming Natrona Wetlands and Adjacent Areas: Edness Kimbell Wilkins State Park: North Platte River, ca 8 air mi E of Casper. -106.175 42.8583 1578 Dry uplands. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2859 Rachel Newton 2005 7 31 212 U.S.A. Wyoming Goshen Wetlands and Adjacent Areas: Horse Creek, ca 8.5 air mi SW of Yoder. -104.1523 41.8621 1278 Dry uplands. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2902 Rachel Newton 2005 7 31 212 U.S.A. Wyoming Platte Wetlands and Adjacent Areas: Antelope Creek and pond formed by damming, ca 14 air mi NNW of Chugwater. -104.8982 41.9406 1470 Moist banks and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3094 Rachel Newton 2005 8 4 216 U.S.A. Wyoming Natrona Wetlands and Adjacent Areas: confluence of Horse Creek and Fish Creek, ca 34 air mi SW of Casper. -106.9647 42.6022 1819 Moist banks and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3452 Rachel Newton 2005 8 11 223 U.S.A. Wyoming Fremont Wetlands and Adjacent Areas: Ocean Lake, ca 18 air mi NW of Riverton. -108.6193 43.21 1609 Moist shoreline and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5064 Rachel Newton 2006 6 17 168 U.S.A. Wyoming Johnson [location and coordinates withheld] 1396 Moist river banks and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5196 Rachel Newton 2006 6 22 173 U.S.A. Wyoming Washakie Wetlands and Adjacent Areas: Brokenback Creek, ca 6 air mi NNW of Ten Sleep. -107.49854 44.10038 1368 Dry sandy uplands. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5204 Rachel Newton 2006 6 22 173 U.S.A. Wyoming Washakie Wetlands and Adjacent Areas: Nowood River, ca 12 air mi NW of Ten Sleep. -107.63067 44.15209 1307 Dry heavily grazed uplands. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5229 Rachel Newton 2006 6 22 173 U.S.A. Wyoming Hot Springs Wetlands and Adjacent Areas: Big Horn River, ca 4 air mi NE of Thermopolis. -108.16351 43.69191 1325 Dry wooded uplands. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5288 Rachel Newton 2006 6 23 174 U.S.A. Wyoming Fremont Wetlands and Adjacent Areas: Bridger Creek, ca 3 air mi NW of Lysite. -107.72191 43.28963 1572 Moist creek banks and exposed creek bottom. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5636 Rachel Newton 2006 6 30 181 U.S.A. Wyoming Park Wetlands and Adjacent Areas: Deaver Reservoir, ca 2 air mi NNW of Deaver; ca 12 air mi NE of Powell. -108.63823 44.8987 1354 Exposed mud flats. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5646 Rachel Newton 2006 6 30 181 U.S.A. Wyoming Park Wetlands and Adjacent Areas: Ralston Reservoir, ca 8 air mi WSW of Powell. -108.88892 44.71248 1420 Along moist reservoir shore. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5669 Rachel Newton 2006 6 30 181 U.S.A. Wyoming Park Wetlands and Adjacent Areas: Shoshone River, ca 16 air mi SW of Powell; ca 8 air mi NE of Cody. -108.94774 44.59048 1424 Moist, rocky river banks. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6144 Rachel Newton 2006 7 20 201 U.S.A. Wyoming Johnson Wetlands and Adjacent Areas: man-made lake, ca 15 air mi SSE of Buffalo. -106.54153 44.10144 1390 Moist lake shore. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6178 Rachel Newton 2006 7 20 201 U.S.A. Wyoming Johnson Wetlands and Adjacent Areas: North Fork Powder River, ca 4 air mi NW of Kaycee. -106.70256 43.77574 1497 Along moist river banks and flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6186 Rachel Newton 2006 7 20 201 U.S.A. Wyoming Johnson Wetlands and Adjacent Areas: Red Fork Powder River, ca 9 air mi W of Kaycee. -106.81559 43.69528 1528 Dry flood plains. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6223 Rachel Newton 2006 7 25 206 U.S.A. Wyoming Hot Springs Wetlands and Adjacent Areas: Big Horn River, ca 4 air mi S of Thermopolis. -108.2152 43.58892 1379 Dry uplands. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6374 Rachel Newton 2006 7 28 209 U.S.A. Wyoming Crook Wetlands and Adjacent Areas: Belle Fouche River, ca 1 air mi NW of Moorcroft. -105.97758 44.27462 1272 Dry uplands. Phenology: flowering. RM RM 765648 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3795 Sarah Nunn 2001 7 31 212 U.S.A. Colorado Larimer Roosevelt National Forest: Front Range: Pennock Pass Road (County Road 44H), at intersection with Buckhorn Creek and Crystal Mountain Road (Forest Road 132), ca 15 air mi W of Fort Collins. -105.4322 40.5756 1 2378 Grassy roadside. Phenology: flowering. RM RM 765647 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4028 Sarah Nunn 2001 8 2 214 U.S.A. Colorado Larimer Roosevelt National Forest: Front Range: Pierson Park, 2 mi SE of Estes Park off Forest Road 119, ca 19 air mi SW of Loveland. -105.4902 40.3008 2 2621 2743 Dry, rocky north facing slopes with lodgepole pine, transition to canopy of Colorado blue spruce above slopes. Phenology: flowering. RM RM 196453 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3454 C. L. Porter 1944 7 18 200 U.S.A. Wyoming Crook Sand Creek, near Beulah. -104.0912 44.5364 1 1067 In meadows along stream. Flowers pink and white. Phenology: flowering. RM RM 255939 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7623 C. L. Porter Marjorie W. Porter 1958 8 11 223 U.S.A. Wyoming Sweetwater Between Little America and Green River. -109.5849 41.5543 5 1951 In ditches in sagebrush desert. Phenology: fruiting. RM RM 805740 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1246 Brian Reif 2002 6 25 176 U.S.A. New Mexico Rio Arriba Santa Fe National Forest and Vicinity: Jemez Mountains: Salitral Creek and spring, 4.5 air mi WNW of Coyote, where Forest Road 148 crosses creek. Collection within 1/4 mi up and down creek and at nearby spring. -106.68205 36.187217 2152 Riparian and sandy banks. Significant salt deposits. Phenology: flowering. RM RM 805739 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2300 Brian Reif 2002 7 14 195 U.S.A. New Mexico Sandoval Santa Fe National Forest and Vicinity: Jemez Mountains: NM Hwy 126 in Telephone Canyon, 12.5 air mi ESE of Cuba. SW for 0.6 air mi on NM Hwy 126 to seep, NE 1.3 air mi to Moon Spring and returning to NM Hwy 126 via Forest Road 117. -106.754017 35.9485 2478 2621 Roadside through canyon bottom meadow. Phenology: flowering. RM RM 805738 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2572 Brian Reif 2002 7 18 199 U.S.A. New Mexico Sandoval Santa Fe National Forest and Vicinity: Jemez Mountains: Fenton Lake, 4.8 air mi W of La Cueva. From state park parking lot S ca 500 ft on NM Hwy 126, and W ca 500 ft from parking lot along north edge of lake. -106.724433 35.885917 2530 2652 Blue spruce slope on north edge of lake. Phenology: flowering. RM RM 805737 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2613 Brian Reif 2002 7 18 199 U.S.A. New Mexico Rio Arriba Santa Fe National Forest and vicinity: Jemez Mountains: Arroyo de los Frijoles, 2.5 air mi W of Abiquiu. From corral at start of Barranca Trail 111 3.4 air mi S to Frijoles Spring. -106.361167 36.19975 1833 2134 Riparian with cottonwoods through canyon of soft sedimentary rock in pinyon/juniper woodland. Phenology: fruiting. RM RM 805741 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 597 Brian Reif 2002 6 13 164 U.S.A. New Mexico Sandoval Santa Fe National Forest and Vicinity: Jemez Mountains: Pablo Canyon, 7 air mi SE of Cuba. From Forest Road 20/533 junction E up canyon 0.5 mi along Forest Road 20. -106.863867 35.952483 2420 2454 Roadside. Phenology: flowering. RM RM 805735 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 76155 Ronald L. Hartman 2002 7 21 202 U.S.A. New Mexico Sandoval Santa Fe National Forest and Vicinity: Jemez Mountains: NM Hwy 126, 1.2 road mi from Forest Road 20, Telephone Canyon. -106.741667 35.955 2439 2469 Grassy valley. Phenology: flowering. RM RM 805734 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 76356 Ronald L. Hartman 2002 8 13 225 U.S.A. New Mexico Rio Arriba Santa Fe National Forest and Vicinity:Jemez Mountains: 14 air mi NNE of Espanola on U.S. Hwy 285. -106.047133 36.212783 1857 Roadside. Phenology: fruiting. RM RM 805736 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4823 Brian Reif 2003 6 2 153 U.S.A. New Mexico San Miguel 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. -105.3714 35.2724 1768 Roadside corridor with pinyon/juniper woodland on sedimentary slope to north; irrigation ditch and riparian of cottonwood, Russian olive to south. Phenology: flowering. RM RM 665653 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2878 Amy J. Roderick 1997 7 29 210 U.S.A. Wyoming Carbon [location and coordinates withheld] 2164 2195 Sandy knoll with scattered ponderosa pine leading into draw and flats of sagebrush, rabbitbrush, and bitterbrush. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2333 Robin Jones 1991 8 8 220 U.S.A. Wyoming Hot Springs Owl Creek/Bridger Mountains: Hot Springs State Park: river bank along the Big Horn River. -108.1872 43.65167 1317 River bank below travertine slope and cliffs. RM USFS 490988 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 335 W. Ellis Wiltbank 1939 7 27 208 U.S.A. New Mexico Otero Lincoln National Forest: Mayhill Ranger Station. -105.46939 32.9089 1 1981 Moderate east slope; shallow limestone; woodland; common with grama grasses. Phenology: flowering. RM RM 305172 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 473 W. Hess D. B. Dunn and Spellman 1965 8 28 240 U.S.A. New Mexico Bernalillo 5 mi E of San Antonio. -106.28079 35.10419 1 2170 Phenology: fruiting. RM RM 143842 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. Wharton Huber 1931 6 20 171 U.S.A. New Mexico Catron Mescalero Apache Indian Reservation: Sacramento Mountains: Tularosa Canyon. -108.4514 33.92069 1 2134 Phenology: flowering. RM RM 665652 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3161 Amy J. Roderick 1997 8 4 216 U.S.A. Wyoming Carbon 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. -106.889 41.4034 2140 Banks of ditch bordered by willow. Phenology: flowering. RM RM 682159 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 141 Michael Oliver 1991 6 25 176 U.S.A. Wyoming Laramie Southeast Plains: Horse Creek, ca 1.3 mi WNW of Meriden and U.S. Hwy 85, ca 0.6 mi S of Goshen County. -104.3484 41.5549 1518 Acer negundo savanna on first terrace along intermittent stream on alluvial soil; understory of milkweed, timothy, brome and bluegrass. Phenology: buds. RM RM 681791 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 202 Michael Oliver 1991 6 28 179 U.S.A. Wyoming Goshen Southeast Plains: Rawhide Creek, ca 15 mi N of Lingle, just W of Wyo Hwy 85. -104.3331 42.3553 1 1341 Dense stand of Scirpus pungens and Elymus repens in floodplain on alluvial soil. Phenology: flowering. RM RM 681790 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 426 Michael Oliver 1991 7 14 195 U.S.A. Wyoming Niobrara Eastern Plains: Sage Creek, ca 20 mi N of Lusk. -104.3538 43.0662 700 1259 Scattered Populus deltoides with patches of Salix exigua and Carex lanuginosa adjacent to channel on mixed alluvium. Phenology: fruiting. RM RM 682141 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 226 Michele Barlow 1991 8 6 218 U.S.A. Wyoming Natrona North Platte River Valley: east bank of North Platte River, ca 0.1 mi N of confluence of Bates Creek. -106.6078 42.7004 1597 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: fruiting. RM RM 601101 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6419 Robert D. Dorn 1995 8 13 225 U.S.A. Wyoming Hot Springs 17 mi E of Thermopolis. -107.8647 43.6384 1524 Roadside with Polygonum and Amarantus. RM RM 718176 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9416 Robert D. Dorn 2002 7 27 208 U.S.A. Wyoming Uinta 16 air mi SSE of Evanston along Wyo Hwy 150. -110.89 41.036667 2317 Along roadside with Salix and Populus. Phenology: flowering. RM RM 665651 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3261 Amy J. Roderick 1997 8 4 216 U.S.A. Wyoming Carbon Upper North Platte and Laramie River Drainages: North Platte River running through Saratoga, ca 0.5 air mi from town center. -106.7934 41.4468 2070 Shaded banks of river lined with cottonwood and willow. Phenology: flowering. RM RM 703455 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 357 Steve Kettler 1991 7 10 191 U.S.A. Wyoming Niobrara Southeastern Plains: Wyatte Creek, ca 10 mi N of Manville. -104.6455 42.913 700 1460 Patchy Salix amygdaloides community with occasional Acer negundo at bottom of wide valley on terrace of mixed alluvium. Understory dominated by dense Bromus inermis. Phenology: flowering & fruiting. RM RM 681761 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 770 Steve Kettler 1991 8 17 229 U.S.A. Wyoming Laramie Southeast Plains: tributary of Bear Creek, ca 25 air mi N of Cheyenne; ca 8 mi W of I-25. -105.0179 41.551 700 1935 Salix exigua community with patches of Symphoricarpos occidentalis and an understory of Elymus canadensis, Carex lanuginosa, and Solidago canadensis on sandy-gravel floodplain. Phenology: fruiting. RM RM 665650 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3322 Amy J. Roderick 1997 8 6 218 U.S.A. Wyoming Carbon Upper North Platte and Laramie River Drainages: Fort Steele State Recreation Area, ca 6.6 air mi NW of Walcott Junction; ca 8.4 air mi E of Sinclair. -106.9541 41.7766 1981 Open sandy bank of river. Phenology: flowering. RM RMRS Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1254 Kenneth W. Parker 1940 8 13 226 U.S.A. New Mexico Otero Lincon National Forest; Ranger Plot 12. Phenology: flowering. RM RMRS Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4 Win Green 1967 7 25 206 U.S.A. Arizona Apache Fort Apache Indian Reservation. [Paradise Creek] -109.64079 33.9457 9 2896 Phenology: flowering & fruiting. RM RM 761907 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 54902 B. E. Nelson 2001 7 30 211 U.S.A. Colorado Routt North-central Colorado: Park Range: Boulder Park along Forest Road 400 and the Elk River, ca 8 air mi NE of Clark; ca 19.5 air mi N of Steamboat Springs. -106.7975 40.7658 1 2378 Roadside and adjacent stony flats. Phenology: flowering. RM RM 665649 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3644 Amy J. Roderick 1997 8 14 226 U.S.A. Wyoming Natrona Upper North Platte and Laramie River Drainages: Pathfinder Reservoir: National Wildlife Refuge N of County Road 410, ca 22 air mi NE of Three Forks Junction. -107.0619 42.5112 1785 Sandy grassland at rivers edge. Phenology: fruiting. RM RM 99098 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 525 Arthur C. McIntosh 1924 7 26 208 U.S.A. South Dakota Pennington Rapid City: Dark Canyon. -103.3616 44.0511 2 1048 1432 Clumps along railroad. Phenology: flowering. RM RM 365357 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9699 Hollis Marriott 1985 7 4 185 U.S.A. South Dakota Custer Jewel Cave National Monument: U.S. Highway 16 between Jewel Cave Road and east boundary. -103.8167 43.7371 1676 Roadside in ponderosa pine forest. Phenology: flowering. RM RM 76200 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2623 S. S. Visher 1911 7 27 208 U.S.A. South Dakota Fall River Phenology: fruiting. RM RM 69918 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 285 S. S. Visher 1910 7 28 209 U.S.A. South Dakota Harding Little Missouri Valley: 12 mi N of Crook. -103.9245 45.7021 1 929 River flood plain. Phenology: flowering & fruiting. RM RM 76427 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 617 S. S. Visher 1912 7 31 213 U.S.A. South Dakota Perkins Bixby. -102.5619 45.1484 1 750 Phenology: flowering. RM RM 718713 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 330 B. Koblitz 2000 6 9 161 U.S.A. Colorado Larimer along Larimer County Road 72 (Owl Canyon Road), 5 mi E of intersection with U.S. Hwy 287. 1746 Roadside, abundant. Phenology: flowering. RM RM 204008 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3882 C. L. Porter 1946 6 21 172 U.S.A. Colorado Moffat Mantle Ranch: Yampa River: Yampa Canyon. River banks. Phenology: flowering. RM RM 33137 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 251 Carl F. Baker 1901 6 11 162 U.S.A. Colorado Mesa Region of the Gunnison Watershed: Grand Junction. 1399 Phenology: flowering. RM RM 13799 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 430 Carl F. Baker F. S. Earle and S. M. Tracy 1898 7 9 190 U.S.A. Colorado Montezuma Mancos. In and near river bottoms and along ditches. Phenology: flowering. RM RM 22577 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 528 Carl F. Baker 1899 7 12 193 U.S.A. Colorado Archuleta Phenology: flowering. RM RM 313493 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 837 Carl F. Baker F. S. Earle and S. M. Tracy 1898 7 8 189 U.S.A. Colorado Montezuma Mancos. In borders of willow thickets along river bottoms. Phenology: flowering. RM RM 133435 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1682 Earl F. Castetter 1932 7 2 184 U.S.A. New Mexico Taos Rio Honda, above Taos. -105.5344 36.5598 1 2439 Field. Phenology: flowering. RM RM 127882 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 995 Earl F. Castetter 1931 7 12 193 U.S.A. New Mexico Sandoval Cosa Soma: Sandia Mountains. Phenology: flowering. RM RM 81054 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 117 Edwin B. Payson 1913 6 26 177 U.S.A. Colorado Montrose Naturita 1646 Phenology: flowering. RM RM 88966 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1615 Edwin B. Payson 1919 8 12 224 U.S.A. Colorado Denver Denver: Platte River. Phenology: fruiting. RM RM 80867 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 507 Edwin B. Payson 1914 7 16 197 U.S.A. Colorado Montrose Naturita. 1646 Phenology: flowering. RM RM 79391 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 137 Ernest P. Walker 1912 6 10 162 U.S.A. Colorado Montrose Paradox. 1646 Phenology: flowering. RM RM 83896 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10542 Francis Ramaley 1915 7 31 212 U.S.A. Colorado Jefferson Semper. Red top zone around lake. Phenology: flowering. RM RM 23461 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. A 100 Francis Ramaley 1900 7 1 182 U.S.A. Colorado Boulder Near Boulder. Phenology: flowering. RM RM 37789 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4955 Frank Tweedy 1902 7 182 U.S.A. Colorado Boulder Near Boulder. 1524 1829 Phenology: flowering & fruiting. RM RM 490982 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1985 G. S. Dodds 1906 6 15 166 U.S.A. Colorado Larimer Fossil Creek. Valley. Phenology: flowering. RM RM 162577 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3934 George E. Osterhout 1909 6 17 168 U.S.A. Colorado Bent Las Animas. Phenology: flowering. RM RM 162583 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3935 George E. Osterhout 1909 6 17 168 U.S.A. Colorado Bent Las Animas. Phenology: flowering. RM RM 162579 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7321 George E. Osterhout 1930 8 5 217 U.S.A. Colorado Routt Hayden. Phenology: flowering & fruiting. RM RM 162582 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7678 George E. Osterhout 1932 8 4 217 U.S.A. Colorado Weld New Windsor. Phenology: flowering & fruiting. RM RM 162578 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 82 George E. Osterhout 1893 6 26 177 U.S.A. Colorado Weld New Windsor. Phenology: flowering. RM RM 311899 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. George E. Osterhout 1909 6 23 174 U.S.A. Colorado Weld Windsor. Phenology: flowering & fruiting. RM RM 311900 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. George E. Osterhout 1930 8 5 217 U.S.A. Colorado Routt Hayden. Phenology: flowering & fruiting. RM USFS 490984 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. L-7 H. C. Lee 1945 8 6 218 U.S.A. Colorado Clear Creek Arapaho National Forest: Kittredge. 2103 Flat, gravelly loam; with cheatgrass, gold aster, mint leaf beebalm. Phenology: flowering. RM RM 98627 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1327 Hazel M. Schmoll 1924 6 30 182 U.S.A. Colorado Archuleta Devil's Creek, Piedra. Phenology: flowering. RM RM 45486 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1530 J. H. Cowen 1895 7 1 182 U.S.A. Colorado Larimer Along the Poudre River. Meadow. Phenology: flowering. RM RM 793992 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1 L. Blay N. E. Hastings 2004 8 11 224 U.S.A. Colorado Arapahoe Buckley Air Force Base: along Toll Gate Creek; northwest end of transect 990 m NNE of the southwest corner of the installation. 521189E 4334488N. 1697 Up to 10 degree slope at edge of cottonwood/willow (riparian) on silt-like loam; with Salix exigua, Ribes aureum, Asclepias speciosa, Helianthus annuus, Melilotus officinalis, Glycyrrhiza lepidota, Cirsium arvense. Phenology: fruiting. RM USFS 490981 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 202 Langeworthy Hamel 1912 8 214 U.S.A. Colorado no county San Isabel National Forest. 2591 Sandy loam. Phenology: flowering. RM USFS 490980 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 344 M. B. Willey 1913 8 1 213 U.S.A. Colorado no county San Isabel National Forest. 2286 Mucky loam. Phenology: flowering. RM RM 793994 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 188 N. E. Hastings C. Bern 2005 6 29 180 U.S.A. Colorado Arapahoe Buckley Air Force Base: south end of transect 845 m E of southwest corner of the installation. 521979E 4392505N to 521830E 4392675N. 1709 Level to rolling shortgrass prairie on clay loam; with Rosa arkansana, Verbascum thapsus, Convolvulus arvensis, Cirsium arvense, Nassella viridula, Rumex crispus, Poa, Bromus spp. Phenology: flowering. RM RM 45487 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1529 no collector 1895 8 17 229 U.S.A. Colorado Larimer Along railroad and E river. Phenology: fruiting. RM USFS 491015 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 619 Paul L. Ginter 1942 8 26 238 U.S.A. Colorado Weld 2 mi E of Kersey on highway. 1402 2% east slope, deep loam, with sunflower and sedges. Phenology: fruiting. RM RM 491015 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 619 Paul L. Ginter 1942 8 26 238 U.S.A. Colorado Weld 2 mi E of Kersey on highway. 1402 2% east slope, deep loam, with sunflower and sedges. Phenology: fruiting. RM RM 296460 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2482 Ronald L. Hartman 1968 7 26 208 U.S.A. New Mexico Colfax Philmont Scout Ranch, near Cimarron: Lovers Leap. -105.0005 36.42569 2195 Along road at edge of thicket. Phenology: flowering. RM USFS 490982 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. W9 S. H. Wright G. Pike 1911 8 11 223 U.S.A. Colorado no county Pike National Forest. 2439 East slope, sandy soil. Phenology: flowering. RM RM 490983 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. V. H. Reid G. L. Ranck 1973 6 25 176 U.S.A. Colorado Mesa Phenology: vegetative only. RM RM 64266 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5756 W. W. Robbins 1908 7 12 194 U.S.A. Colorado Jefferson Semper Lake. Phenology: flowering. RM RM 64422 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7076 W. W. Robbins 1909 8 5 217 U.S.A. Colorado Rio Blanco Half Way House. Phenology: flowering. RM RM 64421 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7250 W. W. Robbins 1909 8 17 229 U.S.A. Colorado Rio Blanco Meeker. Phenology: flowering. RM RM 678731 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3884 B. A. Packer T. McGowan and T. Freeman 1998 7 2 183 U.S.A. Wyoming Converse Laramie Range: along unnamed creek, ca 8.5 air mi from Glenrock on County Road 19. -106.03 42.7297 1829 1981 Cow pasture and adjacent sandstone/granite canyon. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8232 Stuart Markow 1992 6 25 177 U.S.A. Idaho Clark Targhee National Forest: Centennial Mountains: west side of Beaver Creek near confluence with Stoddard Creek, ca 16 air mi N of Dubois. -112.1903 44.4103 1 1829 Moist meadow dominated by forbs and grasses. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9604 Stuart Markow 1992 7 20 202 U.S.A. Idaho Fremont Targhee National Forest: Island Park Plateau: along Warm River, just E of Union Pacific Railroad bed, ca 7 air mi SE of Island Park. -111.3046 44.3383 1 1890 1920 Adjacent to river in logged area dominated by forbs and grasses, some Pinus contorta. RM RM 678730 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4690 B. A. Packer 1998 7 28 209 U.S.A. Wyoming Albany Laramie Range: Sherman, ca 14.5 air mi SE of Laramie. -105.3542 41.0961 2286 2378 Along railroad tracks; and in granite outcroppings and sagebrush grassland. Phenology: flowering. RM RM 678714 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4783 B. A. Packer 1998 7 29 210 U.S.A. Wyoming Laramie Laramie Range: Granite Reservoir: ca 15 air mi E of Laramie. -105.2621 41.1863 1 2286 2347 Along creek. Phenology: flowering. RM RM 617437 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3289 James P. Vanderhorst Carlos Palaci 1991 7 15 196 U.S.A. Colorado Routt Flat Tops/White River Plateau: creek N of Colorado River NW of and near McCoy, ca 18 air mi SSE of Yampa. -106.7508 39.9266 2103 Wet arroyo bottom, with cottonwood, willows, sedges, and grasses. Phenology: flowering. RM RM 617436 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3569 James P. Vanderhorst 1991 7 25 206 U.S.A. Colorado Garfield Flat Tops/White River Plateau: Rifle Mountain Park, ice caves trail and along Rifle Creek, ca 11 air mi N of Rifle. -107.6821 39.7169 2134 Bottom of steep canyon along creek, with Douglas fir and boxelder. Phenology: flowering. RM RM 617435 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4526 James P. Vanderhorst 1991 9 20 263 U.S.A. Colorado Eagle Flat Tops/White River Plateau: mouth of Deep Creek, ca 13 air mi W of Eagle. -107.0594 39.6768 1 1890 Alkaline creek floodplain with Tamarix and Triglochin, wet roadside with Salicornia. Phenology: fruiting. RM RM 617438 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 618 James P. Vanderhorst 1990 6 25 176 U.S.A. Colorado Eagle Flat Tops/White River Plateau: ravine off east side of Colorado River, 16 air mi NE of Glenwood Springs; 3.8 road mi N of Dotsero. -107.0787 39.6915 1890 2012 Sandy beach along river. Phenology: flowering. RM RM 670772 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 39538 B. E. Nelson 1996 8 8 221 U.S.A. Wyoming Sweetwater South-central Wyoming: along Hiawatha or County Road 25 between Wyo Hwy 430 and Colorado, ca 45 air mi SE of Rock Springs. -108.7478 41.0063 2149 Roadside. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5022 Brian F. Jacobs 2002 U.S.A. New Mexico Sandoval Jemez Mountains: Bandelier National Monument: mouth of Canyon de los Frijoles at White Rock Canyon along the Rio Grande and at Frijoles Spring. Disturbed flats along the river, river edge, and seep. Phenology: fruiting. RM RM 814111 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6080 Brian F. Jacobs U.S.A. New Mexico Los Alamos Jemez Mountains: Santa Fe National Forest: along NM Hwy 501 (Backgate Road) at Ski Hill Road turnoff, SW of Los Alamos. 2362 Phenology: flowering. RM RM 910209 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5177 Brian F. Jacobs 1988 7 14 196 U.S.A. New Mexico Sandoval Jemez Mountains: Santa Fe National Forest: ca 1/4 mi below San Antonio Hot Springs, N of La Cueva. 2500 Phenology: flowering. RM RM 672387 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6624 Beth Ward 1997 7 16 197 U.S.A. Wyoming Sweetwater South-Central Wyoming: Green River Basin: streambank and river bottom adjacent to the Green River on the east side, ca 3/4 air mi SSW of Monument Hill; ca 22 air mi WNW of Rock Springs. -109.647 41.687 1881 1884 Immediately adjacent to river. Phenology: fruiting. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7662 Jean Wood K. Ahlenslager, L. Swartz and J. Nisbet 1996 8 13 226 U.S.A. Washington Ferry Western Colville National Forest and Vicinity: Deadman Creek Road, ca 2 mi W of Boyds. -118.1647 48.7072 487 670 Roadside. Phenology: flowering. RM RM 658044 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 24076 B. E. Nelson Russ Nelson 1992 8 12 225 U.S.A. Wyoming Lincoln Wyoming/Salt River Ranges: Wyoming Range: along Hot Foot Creek between Greys River and Middle Ridge, ca 11 air mi SE of Alpine; ca 25.5 air mi NNE of Afton. -110.825 43.0933 1 2073 2103 Semi-barren clay slope with mudstone outcrops. Phenology: flowering & fruiting. RM RM 661218 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10241 B. E. Nelson 1983 7 20 201 U.S.A. Wyoming Hot Springs Bighorn Basin: ca 2.5 air mi W of Kirby; ca 1 mi N of Gebo; ca 11 air mi N of Thermopolis, above and along Sand Draw. -108.22611 43.8114 2 1341 Roadside. Phenology: flowering & fruiting. RM RM 661217 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10272 B. E. Nelson 1983 7 20 201 U.S.A. Wyoming Washakie Bighorn Basin: along Cottonwood Creek, ca 7.5 air mi WNW of Winchester; ca 20.5 air mi SW of Worland. -108.2992 43.8817 1 1371 Banks of irrigation ditch. Phenology: flowering & fruiting. RM RM 661216 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 13535 B. E. Nelson 1987 6 18 169 U.S.A. Wyoming Hot Springs Bighorn Basin: ca 1 mi W of Gebo; ca 10.5 air mi NNW of Thermopolis. -108.2451 43.7922 1371 Slopes on sandstone ridges. Phenology: flowering & fruiting. RM RM 661215 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 13718 B. E. Nelson 1987 6 21 172 U.S.A. Wyoming Park Bighorn Basin: Polecat Bench along Cottonwood Creek, ca 6 air mi W of Frannie; ca 14 air mi N of Powell. -108.7502 44.9513 1432 Roadside. Phenology: flowering & fruiting. RM RM 661214 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 13832 B. E. Nelson 1987 6 23 174 U.S.A. Wyoming Big Horn Bighorn Basin: along Crystal Creek Road above Crystal Creek, ca 17 air mi SE of Lovell. -108.119 44.6888 1280 Edge of saline marsh. Phenology: flowering & fruiting. RM RM 661213 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 13918 B. E. Nelson 1987 6 25 176 U.S.A. Wyoming Big Horn Bighorn Basin: along Little Dry Creek Road, ca 14.5 air mi NW of Greybull, ca 11 air mi NE of Emblem. -108.25722 44.6283 1341 Roadside. Phenology: flowering & fruiting. RM RM 661212 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 13951 B. E. Nelson 1987 6 26 177 U.S.A. Wyoming Park Bighorn Basin: Along Wyo Hwy 114, ca 3 air mi NNW of Garland, ca 6 air mi NE of Powell. -108.68306 44.8192 1371 Sandy clay areas at base of outcrops and ridge. Phenology: flowering & fruiting. RM RM 661211 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 13983 B. E. Nelson 1987 6 28 179 U.S.A. Wyoming Big Horn Bighorn Basin: W of Dry Creek, ca 4.5 air mi ENE of Frannie, ca 12 air mi NW of Lovell. -108.53167 44.9958 1341 Edge of small pond in bentonite badlands. Phenology: flowering & fruiting. RM RM 661210 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 14042 B. E. Nelson 1987 6 29 180 U.S.A. Wyoming Park Bighorn Basin: University of Wyoming Agricultural Experiment Station, ca 1.5 mi N of Powell on Wyo Hwy 295. -108.7433 44.7744 1341 Edge of alfalfa field. Phenology: flowering & fruiting. RM RM 661209 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 14081 B. E. Nelson 1987 6 30 181 U.S.A. Wyoming Park Bighorn Basin: Shearing Pens Reservoir above West Branch Whistle Creek, ca 12 air mi SE of Powell. -108.66306 44.60056 1341 Along shores of reservoir. Phenology: flowering & fruiting. RM RM 661208 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 14187 B. E. Nelson 1987 6 30 181 U.S.A. Wyoming Big Horn Bighorn Basin: along Whistle Creek, ca 6 air mi SW of Byron, ca 12 air mi SW of Lovell. -108.58389 44.71611 1280 Wooded stream bottom. Phenology: flowering & fruiting. RM RM 661207 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 15694 B. E. Nelson Erik Nelson 1988 6 12 164 U.S.A. Wyoming Washakie Bighorn Basin: Dry Cottonwood Creek just above Fifteenmile Creek, ca 20 air mi NW of Worland. -108.2981 44.16056 1341 Stream bank. Phenology: flowering & fruiting. RM RM 597956 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 17309 B. E. Nelson Jan Pollet 1989 7 19 200 U.S.A. Wyoming Platte [location and coordinates withheld] 1463 Grassy bench at edge of river. Phenology: flowering. RM RM 317721 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1842 B. E. Nelson Paul Ehrmann 1978 6 22 173 U.S.A. Wyoming Platte Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 3 air mi N of Wheatland along Wyo Hwy 320. -104.8778 42.1108 1 1402 Common in fence row with Bromus and Elaeagnus. RM RM 331327 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3028 B. E. Nelson 1979 7 4 185 U.S.A. Wyoming Johnson Powder River Basin: ca 13 air mi WSW of Kaycee, ca 0.7 mi E of Barnum on Wyo Hwy 190-Barnum Road, along Beaver Creek. -106.9025 43.6536 1 1554 Sandy flat. RM RM 331324 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3993 B. E. Nelson 1979 7 17 198 U.S.A. Wyoming Johnson Powder River Basin: ca 7 air mi SSE of Kaycee on I-25, along the South Fork Powder River. -106.585 43.6217 1 1402 Slopes along the river. RM RM 347361 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5826 B. E. Nelson 1980 7 8 190 U.S.A. Wyoming Washakie Big Horn Mountains: above the Nowood River on the Upper Nowood Road, ca 5 air mi SW of Nowood, ca 34 air mi S of Ten Sleep. -107.5025 43.5531 1 1829 Roadside in red beds. RM RM 347359 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6681 B. E. Nelson 1980 7 17 199 U.S.A. Wyoming Big Horn Big Horn Mountains: on the rim of White Creek Canyon, ca 7.5 air mi E of Shell, ca 21 air mi ENE of Greybull. -107.62944 44.5283 1 2073 Roadside. RM RM 346839 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7105 B. E. Nelson Gael Fonken 1980 8 14 227 U.S.A. Wyoming Washakie Big Horn Mountains: at the head of Tensleep Canyon on an old section of U.S. Hwy 16, ca 12.5 air mi NE of Ten Sleep. -107.24111 44.1456 1 2271 Disturbed area. RM RM 661223 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8213 B. E. Nelson 1981 7 16 197 U.S.A. Wyoming Washakie Bighorn Basin: ca 2 air mi E of Castle Gardens, ca 6 air mi SSW of Tensleep. -107.469 43.9564 1 1432 Under junipers on shaly ridge. Phenology: flowering & fruiting. RM RM 661222 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8235 B. E. Nelson 1981 7 16 197 U.S.A. Wyoming Washakie Bighorn Basin: along Bud Kimball Creek, ca 7.5 air mi S of Tensleep, ca 4 air mi ESE of Castle Gardens. -107.42056 43.9269 1 1402 Flats above the creek. Phenology: flowering & fruiting. RM RM 661221 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8305 B. E. Nelson 1981 7 19 200 U.S.A. Wyoming Hot Springs Bighorn Basin: ca 9.5 air mi NW of Thermopolis along Wyo Hwy 170. -108.3853 43.7092 1 1463 Bar pits and weedy sagebrush flats. Phenology: flowering & fruiting. RM RM 661220 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8429 B. E. Nelson 1981 7 21 202 U.S.A. Wyoming Big Horn Bighorn Basin: Owl Charco Reservoir, ca 18 air mi SW of Basin on Fifteenmile Creek Road. -108.26028 44.1747 1 1371 In the reservoir area. Phenology: flowering & fruiting. RM RM 661219 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8458 B. E. Nelson 1981 7 21 202 U.S.A. Wyoming Washakie Bighorn Basin: Rock Waterhole Reservoir, ca 22 air mi NW of Worland on Fifteenmile Creek Road. -108.3383 44.16056 1 1371 Clay slopes around the reservoir. Phenology: flowering & fruiting. RM RM 384962 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4249 June Haines 1985 6 20 171 U.S.A. Wyoming Fremont Wind River Basin: Haines farm, ca 9 mi W of Riverton on U.S. Hwy 26. -108.5277 43.0916 1639 Canal bank. RM RM 384961 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4466 June Haines 1985 6 22 173 U.S.A. Wyoming Fremont East side of Boysen Reservoir, southern edge of bay. -108.1726 43.2799 2 1440 Sandy beach. RM RM 384960 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4871 June Haines 1985 7 18 199 U.S.A. Wyoming Fremont Wind River Basin: Lake Cameahwait, ca 20 air mi ENE of Riverton, south side of appraoch of Cottonwood Drain to Lake Cameahwait. -108.2713 43.2943 1472 1484 Creek bank. RM RM 384959 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4994 June Haines 1985 7 22 203 U.S.A. Wyoming Fremont Wind River Basin: eastern edge of Sand Mesa, W of Boysen Reservoir, ca 22.5 air mi ENE of Riverton. -108.1923 43.3233 1439 1463 Edge of cattail marsh. RM RM 384958 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5479 June Haines Georgia Haines 1985 8 12 224 U.S.A. Wyoming Fremont Wind River Basin: Ocean Lake, east side, ca 3 air mi WSW of Midvale. -108.5672 43.2075 1595 1609 Meadow at edge of lake. RM RM 384957 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7043 June Haines Georgia Haines 1986 7 27 208 U.S.A. Wyoming Fremont Granite Mountain Uplift: edge of Beaver Rim: W of Rock Creek Mountain, above tributary of Rock Creek, ca 17 air mi NNE of Sweetwater Station. -108.0628 42.7613 2149 Sandy slope. RM RM 322245 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2951 Keith H. Dueholm 1978 6 26 177 U.S.A. Wyoming Campbell [location and coordinates withheld] 1128 Thermal creek, adjacent plains; plains, near stream. RM RM 322228 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3370 Keith H. Dueholm Mary Alice Sanguinetti 1978 7 5 186 U.S.A. Wyoming Converse Powder River Basin: near Bozeman Trail Monument. -105.7869 43.3967 1 1646 Bottom of draw. RM RM 322243 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3483 Keith H. Dueholm Mary Alice Sanguinetti 1978 7 7 188 U.S.A. Wyoming Campbell [location and coordinates withheld] 1189 Streambank, shaded ravine, gravel slope, highway right-of-way; near stream. RM RM 322246 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3703 Keith H. Dueholm Mary Alice Sanguinetti 1978 7 8 189 U.S.A. Wyoming Campbell [location and coordinates withheld] 1189 Uplift on plains, loose talus slopes, ponderosa pine slopes and ravines; gravel roadside. RM RM 322248 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5043 Keith H. Dueholm 1978 7 27 208 U.S.A. Wyoming Campbell [location and coordinates withheld] 1552 Caprock topped mesa, sagebrush/grassland on lower slopes, limber pine scattered, rocky slopes, loose sandy slopes, plains at summit, with occasional wet depressions; slopes. RM RM 331325 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8055 Keith H. Dueholm 1979 7 12 193 U.S.A. Wyoming Johnson [location and coordinates withheld] 1432 Sagebrush plains, wet draw, hills with clinker outcrops; bottom of draw. RM RM 331322 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8446 Keith H. Dueholm 1979 7 21 202 U.S.A. Wyoming Johnson Powder River Basin: ca 1 air mi SW of Lake De Smet. -106.7736 44.44833 1 1402 Roadside. RM RM 331326 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8591 Keith H. Dueholm 1979 8 2 214 U.S.A. Wyoming Johnson Powder River Basin: along Clear Creek, ca 2 air mi ENE of Buffalo. -106.6497 44.36056 1 1432 Gallery forest and meadows along creek; meadow. RM RM 331323 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9050 Keith H. Dueholm 1979 8 12 224 U.S.A. Wyoming Sheridan Powder River Basin: Prairie Dog Creek, along Wyo Hwy 336, ca 2 air mi E of Sheridan. -106.90194 44.8275 1 1128 Meadows and willow thickets along creek; roadside. RM RM 347360 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10776 Ronald L. Hartman 1979 8 7 219 U.S.A. Wyoming Sheridan Big Horn Mountains: Freezeout Stock Trail. -107.398 44.8922 1 1646 2073 East exposure on limestone and Chugwater Red beds; mostly open with a few groves of Pinus ponderosa. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 29619 Ronald L. Hartman 1991 6 30 181 U.S.A. Wyoming Fremont Owl Creek/Bridger Mountains: Bridger Mountains: Birdseye Road, ca 11 air mi N of Shoshoni. -108.0833 43.3792 1554 1585 Bench and adjacent slopes with sagebrush. RM RM 322244 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7444 Ronald L. Hartman Mary Alice Sanguinetti 1978 6 26 177 U.S.A. Wyoming Johnson Powder River Basin: ca 4 air mi N of I-90 at the Powder River crossing. -106.14667 44.2767 2 1341 Low hills and drainage. RM RM 582199 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5164 Walter Fertig 1990 8 2 214 U.S.A. Wyoming Sublette West Slope Wind River Range: north shore of New Fork Lakes, ca 17 air mi N of Pinedale. -109.9478 43.1031 3 2384 Open canopy weedy-sagebrush community adjacent to Narrows Campground Road. RM RM 597955 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 26950 B. E. Nelson 1993 7 18 199 U.S.A. Wyoming Laramie Southern Powder River Basin/Southeastern Plains: Southeastern Plains: plains S of head of West Kellehan Creek on Sorenson or County Road 156, ca 5.7 air mi WNW of Albin; ca 38 air mi NE of Cheyenne. -104.2077 41.4372 1653 Roadside and ditch. Phenology: flowering. RM RM 597954 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 27103 B. E. Nelson 1993 7 19 200 U.S.A. Wyoming Goshen [location and coordinates withheld] 1350 1356 Roadside and fence line. Phenology: flowering. RM RM 597953 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 27140 B. E. Nelson 1993 7 19 200 U.S.A. Wyoming Goshen [location and coordinates withheld] 1350 1356 Meadows in the creek bottom intermixed with tall grass and short grass. Phenology: flowering. RM RM 597952 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 27329 B. E. Nelson 1993 7 23 204 U.S.A. Wyoming Converse [location and coordinates withheld] 1518 Cottonwood woodland with Elaeagnus and Shepherdia. Phenology: flowering. RM RM 597951 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 27953 B. E. Nelson 1993 7 30 211 U.S.A. Wyoming Converse Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Dry Creek ca 0.5 mi above and N of Lightning Creek, ca 0.5 air mi W of Niobrara County on Walker Creek or County Road 43, ca 29.5 air mi NE of Douglas. -104.9042 43.1711 1310 Edge of stream channel and adjacent steep banks. Phenology: flowering. RM RM 597950 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 28679 B. E. Nelson 1993 8 17 229 U.S.A. Wyoming Goshen [location and coordinates withheld] 1506 1512 Roadside. Phenology: flowering. RM RM 597949 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 29112 B. E. Nelson 1993 8 24 236 U.S.A. Wyoming Natrona 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. -106.6839 42.8286 1 1676 1695 Sand bars, stream bank, and low moist benches. Phenology: fruiting. RM RM 597948 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 29142 B. E. Nelson 1993 8 25 237 U.S.A. Wyoming Natrona [location and coordinates withheld] 1560 Moist open Russian olive-cottonwood woodland. Phenology: fruiting. RM RM 597947 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 29339 B. E. Nelson 1993 8 26 238 U.S.A. Wyoming Converse [location and coordinates withheld] 1503 Sandy flats along the river with scattered trees. Phenology: fruiting. RM RM 663870 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 31576 B. E. Nelson 1994 6 15 166 U.S.A. Wyoming Laramie Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Horse Creek and bluffs to the north, ca 4.5 air mi S of Indian Hill, ca 24.5 air mi N of Cheyenne. -104.7512 41.4726 1734 1768 At the base of cliffs. Phenology: flowering. RM RM 663871 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 31885 B. E. Nelson 1994 6 21 172 U.S.A. Wyoming Converse Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Cow Creek and the north end of Cow Creek Buttes, ca 15 air mi ENE of Bill; ca 43 air mi NE of Douglas. -104.9708 43.3126 1381 1384 Low benches and old stream bars. Phenology: flowering. RM RM 663872 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 31943 B. E. Nelson 1994 6 21 172 U.S.A. Wyoming Converse Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: on the divide between Archie Draw, Coal Draw and Middle Creek just W of Cow Creek Buttes, ca 14 air mi ENE of Bill; ca 40.5 air mi NE of Douglas. -104.9903 43.2841 1475 1481 Roadside. Phenology: flowering. RM RM 663873 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 31975 B. E. Nelson 1994 6 21 172 U.S.A. Wyoming Converse Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Lake Creek and the buttes to the SE ca 6 air mi SW of Dull Center; ca 45.5 air mi NNE of Douglas. -105.0902 43.3846 1 1353 1356 Stream banks. Phenology: flowering. RM RM 663862 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 32065 B. E. Nelson David Reilly 1994 6 23 174 U.S.A. Wyoming Goshen 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. -104.5473 42.2025 1 1289 River bank. Phenology: flowering. RM RM 663863 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 32291 B. E. Nelson 1994 6 27 178 U.S.A. Wyoming Natrona Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Castle Rock and vicinity ca 5 air mi SSE of Midwest; ca 34.5 air mi N of Casper. -106.2436 43.3503 1560 1591 Roadside. Phenology: flowering. RM RM 663864 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 32577 B. E. Nelson 1994 7 8 189 U.S.A. Wyoming Laramie Southern Powder River Basin/Southeastern Plains: Southeastern Plains: in the canyon along Spring Creek, ca 34 air mi NNW of Cheyenne; ca 11 air mi ENE of Farthing (Iron Mountain). -105.0167 41.6096 700 1835 1896 In a broad sand wash in the bottom of a canyon. Phenology: flowering. RM RM 663865 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 32889 B. E. Nelson 1994 7 15 196 U.S.A. Wyoming Converse Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Box Creek just below Bobby Draw off Highland Loop or County Road 32, ca 12.7 air mi SW of Bill; ca 22 air mi N of Douglas. -105.3844 43.0808 1493 1500 Sandy flats in the stream bottom with patches of silver sage and scattered cottonwoods. Phenology: flowering. RM RM 663866 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33115 B. E. Nelson David Reilly and Jim Cahill 1994 7 20 201 U.S.A. Wyoming Goshen Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: S of the Laramie River along the north side of the Fort Laramie Canal, ca 2 air mi SW of Fort Laramie (town); ca 21 air mi NW of Torrington. -104.5516 42.1961 1292 1298 Sandy lowlands. Phenology: flowering. RM RM 663867 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33293 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 2 214 U.S.A. Wyoming Goshen Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Bear Creek ca 0.5 mi above the mouth of Spring Run, ca 17.7 air mi W of LaGrange, ca 34.5 air mi SSW of Torrington. -104.5039 41.6197 1518 Sandy flats in the creek bottom with patches of snowberry, chokecherry or boxelder. Phenology: fruiting. RM RM 663868 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33473 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 4 216 U.S.A. Wyoming Goshen 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. -104.3478 41.8077 700 1326 1338 Clay slopes near the reservoir with scattered greaswood. Phenology: fruiting. RM RM 663869 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33547 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 4 216 U.S.A. Wyoming Goshen 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. -104.3686 41.6519 1457 Brushy, with scattered trees in stream bottom adjacent to natural hay fields. Phenology: flowering. RM RM 663853 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33670 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 9 221 U.S.A. Wyoming Natrona 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. -106.6092 42.7397 1643 1658 Moist to wet meadow slopes from ditch leakage. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33706 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 9 221 U.S.A. Wyoming Natrona 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. -106.5685 42.715 1606 1609 Disturbed areas above the creek. Phenology: fruiting. RM RM 663854 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33706 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 9 221 U.S.A. Wyoming Natrona Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Poison Spring Creek ca 3/4 air mi N of the North Platte River and ca 2 air mi SW of Bessemer Mountain, ca 16 air mi SW of Casper. -106.5685 42.715 1606 1609 Disturbed areas above the creek. Phenology: fruiting. RM RM 663855 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33854 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 11 223 U.S.A. Wyoming Platte Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Chugwater Creek, ca 0.5 air mi N of Bordeaux, ca 9.5 air mi SE of Wheatland. -104.8377 41.9373 1475 Between hay meadows and creek bank. Phenology: flowering. RM RM 663856 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33877 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 12 224 U.S.A. Wyoming Platte 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. -104.8583 42.1256 1 1347 1353 Riparian benches, streambanks and adjacent meadows. Phenology: fruiting. RM RM 663857 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 33936 B. E. Nelson Tim Chumley and Robbin Romberg 1994 8 12 224 U.S.A. Wyoming Platte Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Chugwater Creek below Antelope Gap Road, ca 3-3.3 air mi E of Wheatland. -104.895 42.0544 1390 Entrenched creek banks and adjacent meadows. Phenology: fruiting. RM RM 663858 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 34215 B. E. Nelson 1994 8 21 233 U.S.A. Wyoming Converse Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Antelope Creek and Ross or County Road 31, ca 31 air mi WNW of Bill, ca 50.5 air mi NNW of Douglas, ca 3.5 air mi SE of Ross. -105.828 43.4216 1557 1573 Moist meadows in the valley bottom. Phenology: fruiting. RM RM 663859 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 34318 B. E. Nelson Tim Chumley 1994 8 23 235 U.S.A. Wyoming Goshen Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Rawhide Creek ca 2.3 air mi SW of Tea Kettle Rock and ca 0.5-1 air mi N of the Interstate Canal, ca 7 air mi NE of Lingle, ca 11.3 air mi NNW of Torrington. -104.2619 42.2141 1292 1295 Clay flats along the creek. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6336 Robert D. Dorn 1995 7 31 212 U.S.A. Wyoming Natrona 5 mi NE of Casper. -106.2146 42.8876 1585 Moist depression with Typha and Scirpus. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6419 Robert D. Dorn 1995 8 13 225 U.S.A. Wyoming Hot Springs 17 mi E of Thermopolis. -107.8647 43.6384 1524 Roadside with Polygonum and Amarantus. RM RM 597946 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 38840 Ronald L. Hartman 1993 6 27 178 U.S.A. Wyoming Converse Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Wyoming Game and Fish Access area along the North Platte River in vicinity of Carey, ca 10 air mi E of Glenrock. -105.6681 42.8568 1 1502 River margin and sandy flats and slopes. Phenology: flowering. RM RM 597945 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 39433 Ronald L. Hartman 1993 7 1 182 U.S.A. Wyoming Platte [location and coordinates withheld] 1493 1524 Stream bed and sandy plains. Phenology: flowering. RM RM 597944 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 39865 Ronald L. Hartman 1993 7 4 185 U.S.A. Wyoming Platte [location and coordinates withheld] 1493 Sandy plains and slopes with adjacent irrigation canals. Phenology: flowering. RM RM 597889 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 40009 Ronald L. Hartman 1993 7 4 185 U.S.A. Wyoming Platte Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Johnson Reservoir 3, ca 6 air mi NNW of Wheatland. -104.995 42.1256 1371 Sandy slopes and lake margin. Phenology: flowering. RM RM 597888 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 40088 Ronald L. Hartman 1993 7 4 185 U.S.A. Wyoming Converse [location and coordinates withheld] 1432 Sandy soil along river and railroad. Phenology: flowering. RM RM 597887 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 40837 Ronald L. Hartman 1993 7 11 192 U.S.A. Wyoming Platte Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Wyo Hwy 34 and I-25 interchange, ca 7 mi S of Wheatland. -104.9517 41.9675 1493 Sandy slopes and stream bottom. Phenology: flowering. RM RM 597886 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 41092 Ronald L. Hartman 1993 7 13 194 U.S.A. Wyoming Laramie [location and coordinates withheld] 1996 Disturbed areas along railroad. Phenology: flowering. RM RM 663860 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 315 Timothy W. Chumley 1994 8 24 236 U.S.A. Wyoming Goshen Southern Powder River Basin/Southeastern Plains: Goshen Hole: along Horse Creek ca 1/4 air mi S of County Road 182, ca 1/2 air mi E of Hawk Springs; ca 20.5 air mi SSW of Torrington. -104.2489 41.7713 700 1323 Wet areas along the creek, and springs and marshes above the creek. Phenology: fruiting. RM RM 663861 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 415 Timothy W. Chumley 1994 8 26 238 U.S.A. Wyoming Goshen Southern Powder River Basin/Southeastern Plains: Goshen Hole: along Bear Creek ca 1 air mi W of Wyo Hwy 151 crossing, ca 10 air mi S of Hawk Springs, ca 46 air mi NE of Cheyenne. -104.2328 41.639 1 1454 1457 Along wooded and entrenched stream with steep to vertical banks. Phenology: fruiting. RM RM 666695 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5636 Amy J. Roderick 1998 6 27 178 U.S.A. Wyoming Natrona Upper North Platte and Laramie River Drainages: Platte River Parkway, ca 0.3 air mi N of Wyo Hwy 220; ca 1 air mi S of Mills. -106.3719 42.8292 1554 Thickets along river and adjacent gravelly areas; canary grass common. Phenology: flowering. RM RM 828376 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1449 Brian Elliott 1998 6 12 163 U.S.A. Colorado Costilla Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: by radio tower, ca 2 mi on Colo Hwy 159, S of San Luis. -105.5042 37.1667 2378 2439 By small reservoir and on hill; riparian with Artemesia tridentata. RM RM 371113 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1858 Hollis Marriott 1982 8 5 217 U.S.A. Wyoming Weston [location and coordinates withheld] 1341 Disturbed soil near lake. Phenology: fruiting. RM RM 371115 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4486 Hollis Marriott 1983 7 12 193 U.S.A. Wyoming Crook [location and coordinates withheld] 1371 Grassland and disturbed soil around lake. Phenology: fruiting. RM RM 699358 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4883 Hollis Marriott 1983 7 21 202 U.S.A. Wyoming Crook Black Hills: Keyhole Reservoir, Belle Fourche River below dam; ca 12 air mi NE of Moorcroft. -104.78972 44.3908 1 1219 River bank. Phenology: flowering & fruiting. RM RM 371117 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5193 Hollis Marriott 1983 7 28 209 U.S.A. Wyoming Crook Black Hills, Redwater Creek, ca 2.2 air mi WNW of Beulah. -104.1226 44.5557 1 1097 Grassland, roadside. Phenology: flowering. RM RM 371118 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5582 Hollis Marriott 1983 8 4 216 U.S.A. Wyoming Crook Black Hills, Inyan Kara Creek E of HK Divide, ca 15 air mi W of Sundance. -104.6889 44.3914 1 1280 Streambanks. Phenology: fruiting. RM RM 371119 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5879 Hollis Marriott 1983 8 29 241 U.S.A. Wyoming Crook Black Hills, Belle Fourche River near Mona, ca 14.5 air mi NNE of Hulett. -104.4053 44.8436 1 1067 Riverbank. Phenology: fruiting. RM RM 828375 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2207 Brian Elliott 1998 6 18 169 U.S.A. Colorado Saguache Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: on Colo Hwy 114 at west end of Saguache. -106.1561 38.0916 2359 Grassland. RM RM 371120 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8233 Hollis Marriott 1984 7 30 212 U.S.A. Wyoming Crook [location and coordinates withheld] 1402 Creek bottom in grassland-- streambanks. Phenology: fruiting. RM RM 371121 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8557 Hollis Marriott Dennis Horning 1984 8 4 217 U.S.A. Wyoming Weston [location and coordinates withheld] 1768 Creek bottom in spruce-pine forest, disturbed soil along dirt road. Phenology: flowering. RM RM 371122 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9318 Hollis Marriott 1984 8 21 234 U.S.A. Wyoming Crook Black Hills: Belle Fourche River Valley ca 6 air mi S of Colony, ca 17 air mi WNW of Belle Fourche, SD. -104.14222 44.7881 1 960 Riverbank. Phenology: fruiting. RM RM 322247 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4785 Keith H. Dueholm 1978 7 24 205 U.S.A. Wyoming Weston Powder River Basin: along Alkali Creek, ca 11 air mi W of Upton. -104.8678 44.0967 2 1341 Along creek, roadside; roadside. Phenology: flowering & fruiting. RM RM 371123 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 15829 Ronald L. Hartman 1983 7 11 192 U.S.A. Wyoming Crook Powder River Basin: Little Missouri River: ca 21 air mi NNE of Hulett. -104.48472 44.9744 1 1067 River bottoms, hay field margins, and ash woodlands; river bottom. Phenology: flowering. RM RM 371124 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 15852 Ronald L. Hartman 1983 7 11 192 U.S.A. Wyoming Crook Black Hills: Belle Fourche River: ca 16 air mi NE of Alva. -104.2244 44.8725 1 990 Shale bluffs, river bottoms, and sagebrush plains above; shale slopes. Phenology: flowering. RM RM 371125 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 16489 Ronald L. Hartman 1983 7 18 199 U.S.A. Wyoming Crook Black Hills: Beaver Creek; ca 6.5 air mi NNW of Alva. -104.48833 44.7847 1 1158 Wooded creek bottoms, prairie, sandy slopes below rock outcrop, and roadside; stream side. Phenology: flowering. RM RM 828374 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2568 Brian Elliott 1998 6 24 175 U.S.A. Colorado Las Animas Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: W of I-25 at Exit 2 (Wooten exit). -104.5014 37.6444 2158 Dirt road west of freeway at small bridge; riparian with Quercus gambellii. RM RM 371126 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 17847 Ronald L. Hartman 1984 7 11 193 U.S.A. Wyoming Crook Black Hills: Green Mountain, ca 3 air mi E of Sundance. -104.32611 44.4219 2 1463 Plains with outcrops of Chugwater red beds, Pinus ponderosa covered mountain slopes and summit, and moist shaded limestone canyon; plains. Phenology: flowering. RM RM 371127 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 18285 Ronald L. Hartman 1984 7 15 197 U.S.A. Wyoming Crook Black Hills: ca 4 air mi NW of summit of Inyan Kara Mountain. -104.42667 44.23111 1 1463 Sagebrush slopes on red beds with moist drainage. Phenology: flowering. RM RM 7688 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2213 Aven Nelson 1896 7 6 188 U.S.A. Wyoming Crook Rockyford. Phenology: flowering. RM RM 793859 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 14 Patricia P. Douglas N. Hastings 1997 7 3 184 U.S.A. Wyoming Sheridan Sheridan Training Area: site upslope, ca 2.6 km NE of Peak 4236 (335200E 4967300N), 2.4 km NNW of Peak 4290 (336500E 4967320N). 336100E 4969800N. 1230 South-facing 20-30 degree slope on Artemisia grassland on clay-loam, soil sereis Parmleed-Worfka association, with Artemisia tridentata, Pediomelon argophyllum, Stipa viridula, Elymus smithii, Bromus spp. Phenology: flowering. RM RM 828373 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2757 Brian Elliott 1998 6 27 178 U.S.A. Colorado Las Animas [location and coordinates withheld] 1951 Top of hill to east; pinyon-juniper. Phenology: flowering. RM RM 665037 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 617 Ann Aldrich 1979 7 30 211 U.S.A. Wyoming Sweetwater Black Mountain, ca 28 air mi SSW of Green River and 15.5 air mi NE of McKinnon. 1914 Shallow sandy soil in a sage-grassland roadside area with Cardaria pubescens and Chrysothamnus viscidiflorus. Phenology: flowering. RM RM 5492 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1573 Aven Nelson 1895 8 3 215 U.S.A. Wyoming Albany McGills Ranch. Phenology: flowering. RM RM 7689 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1995 Aven Nelson 1896 6 30 182 U.S.A. Wyoming Laramie Cheyenne. -104.8202 41.14 4 1859 Phenology: flowering. RM RM 3654 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 575 Aven Nelson 1894 7 21 202 U.S.A. Wyoming Niobrara Silver Cliff, Lusk. -104.465 42.7634 1524 Phenology: flowering. RM RM 3655 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 575 Aven Nelson 1894 7 21 202 U.S.A. Wyoming Niobrara Silver Cliff, Lusk. -104.465 42.7634 1524 Phenology: fruiting. RM RM 29114 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8096 Aven Nelson 1900 8 19 231 U.S.A. Wyoming Albany Laramie. Sandy, fallow ground near river. Phenology: flowering. RM RM 37437 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8397 Aven Nelson 1903 7 13 194 U.S.A. Wyoming Converse Glenrock. Open sandy river banks. Phenology: flowering. RM RM 828372 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2899 Brian Elliott 1998 6 27 178 U.S.A. Colorado Huerfano [location and coordinates withheld] 2347 Sandy soil with pinyon-juniper. Phenology: flowering. RM RM 398807 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 86 Dan Lewis 1981 7 2 183 U.S.A. Wyoming Converse LaBonte Creek at the North Platte River, ca 7.5 air mi S of Douglas. 1524 Common on streambanks. Phenology: flowering. RM RM 544329 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 368 Jan Pollet 1989 8 8 220 U.S.A. Wyoming Platte Laramie River, 12 road mi NE of Wheatland. -104.8411 42.1219 1 1432 Creek banks and grassland. Phenology: flowering. RM RM 544332 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 489 Jan Pollet 1989 8 23 235 U.S.A. Wyoming Platte Along Brush Creek, 17 road mi E of Wheatland. -105.1089 41.8346 1 1737 Creek banks, dry, some standing water. Phenology: fruiting. RM RM 544330 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 615 Jan Pollet 1989 9 2 245 U.S.A. Wyoming Platte North Platte River, S of U.S. Hwy 26, 0.5 road mi S of Guernsey. -104.7243 42.2558 1 1323 Phenology: fruiting. RM RM 336333 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9410 Noel H. Holmgren Patricia K. Holmgren 1979 9 6 249 U.S.A. Wyoming Albany Laramie Plains: ca 20 km (12 mi) E of Woods Landing; 24 km (15 mi) airline distance SW of downtown Laramie. Locally common in roadside ditch. Phenology: fruiting. RM RM 594691 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5647 Robert D. Dorn 1994 6 7 158 U.S.A. Wyoming Goshen 7 mi SE of Torrington. -104.0528 42.0041 1219 Roadside with Bromus, Parthenocissus. Phenology: flowering. RM RM 594850 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5748 Robert D. Dorn 1994 7 23 204 U.S.A. Wyoming Albany 10.5 mi SE of Laramie. -105.4319 41.2275 2530 Roadside with Grindelia, Achillea. Phenology: flowering. RM RM 600749 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6336 Robert D. Dorn 1995 7 31 212 U.S.A. Wyoming Natrona 5 mi NE of Casper. 1585 Moist depression with Typha, Sciprus. Phenology: flowering. RM RM 396629 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 607 Roger L. Williams 1987 8 14 226 U.S.A. Wyoming Carbon Medicine Bow Mountains: between Old Spring Ditch and French Creek Road, ca 13 air mi E of Encampment. -106.5434 41.2147 2256 One patch on open slope between ditch and road. Phenology: flowering & fruiting. RM RM 335576 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 54 Thomas J. Mastrella 1980 7 2 184 U.S.A. Wyoming Carbon Ca 6.5 air mi E of Baggs, 0.5 mi N of Dixon on County Road 503. 1981 Growing in silty loam along saturated roadside ditch with Salix and Agropyron. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 76396 B. E. Nelson 2008 8 15 228 U.S.A. Montana Carbon Bighorn Basin: along a tributary of South Fork Bridger Creek just W of Pryor Mountain Road, ca 8 air mi SE of Bridger. -108.8155 45.207 1 1262 1323 Along stream through redbeds and adjacent wet to dry meadows dominated by Glycyrrhiza. Phenology: fruiting. RM RM 828371 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4247 Brian Elliott 1998 7 27 208 U.S.A. Colorado Saguache Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: ca 0.5 mi from County Road LL-56 up BLM road to Kelly Creek; W of Villa Grove; S of Poncha Springs. Center of section 9. -105.9813 38.2516 2500 Prairie. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1117 Bernadette Kuhn 2007 6 11 162 U.S.A. Kansas Morton Cimarron National Grassland: at Recreation Area along the Cimarron River, 9.5 mi NNE of Elkhart. -101.8231 37.1357 1038 Cottonwood gallery forest along the river with large stands of Tamarix; sandy soil. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2244 Bernadette Kuhn Joe Rankin 2007 7 6 187 U.S.A. Kansas Morton Cimarron National Grassland: Cimarron National Grassland Recreational Area: ca 10 air mi NE of Elkhart. -101.8259 37.1359 1083 Around pond in recreational area dominated by Helianthus annuus, Ambrosia sp., and Populus deltoides. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2672 Bernadette Kuhn Quinn Long, Jennifer Moody-Weiss, and Gianna Short 2007 7 13 194 U.S.A. Colorado Las Animas Comanche National Grassland: along Purgatoire River, ca 29 air mi SSW of La Junta. -103.6531 37.5744 1354 Along river bank with Salix exigua thickets. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5656 Bernadette Kuhn Cali Hemenway 2008 6 24 176 U.S.A. Colorado Las Animas [location and coordinates withheld] 1856 Along base of mesa, dominated by Pinus edulis, Juniperus monosperma, and Juniperus scopulorum. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6112 Bernadette Kuhn 2008 7 1 183 U.S.A. Coloradon Otero [location and coordinates withheld] 1284 Dominated by Spartina pectinata. Phenology: flowering. RM RM 840395 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4510 Ben Legler 2007 6 17 168 U.S.A. New Mexico Colfax Vermejo Park Ranch: along Dillon Canyon Road just downstream (E of) mouth of Gardiner Canyon on south side of golf course on SW side of Raton. -104.4713889 36.88641667 5 2014 Open valley bottom with scattered Populus angustifolia and P. deltoidea along dry streambed; surrounded by grassy fields. Flowers pink; stems scattered along roadside. Photographed. Phenology: flowering. RM RM 840394 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5395 Ben Legler 2007 7 2 183 U.S.A. New Mexico Colfax Vermejo Park Ranch: along banks of Ponil Creek 2.6 air mi E of Cimarron. -104.8668056 36.50802778 6 1928 Flowing stream with silty eroding banks, creek bed dominated by Acer negundo, Salix exigua, Phragmites australis. Flowers red-pink; local in moist silty soil. Photographed. Phenology: flowering. RM RM 840393 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6315 Ben Legler 2007 7 19 200 U.S.A. New Mexico Colfax Vermejo Park Ranch: along road between Casa Grande and Costilla Lodge 1/2 air mi W of where the Vermejo River passes through The Little Wall. -105.1328056 36.95033333 3 2525 Weedy road shoulder surrounded by flat grassland. Petals pale red, reflexed; corona white with slight pink tinge; stamens dull greenish; several large clumps of stems on road side. Photographed. Phenology: flowering. RM RM 840391 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7179 Ben Legler 2007 8 6 218 U.S.A. New Mexico Colfax Vermejo Park Ranch: small wash on west side of Gardiner Road (County Road 20A) 0.4 mi N of junction with NM Hwy 555; 3.0 air mi SW of Raton. -104.4732778 36.86883333 4 2015 Dry sandy wash, still moist from recent rains, among pinyon-juniper woodland, with Rhus trilobata, Quercus ×undulata, Helianthus annuus. Uncommon in sand along bottom of wash. Phenology: fruiting. RM RM 840390 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7782 Ben Legler 2007 8 16 228 U.S.A. New Mexico Colfax Vermejo Park Ranch: fields on northeast side of French Lake; 1.5 air mi E of Cimarron. -104.8908889 36.51177778 4 1954 Old hay fields and adjacent dry ditches, with grasses, Helianthus annuus, Phragmites australis, Grindelia squarrosa, Ericameria nauseosa, Salix exigua. Stems to 1 meter tall; occasional on road edge. Phenology: fruiting. RM RM 840389 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8984 Ben Legler 2008 6 23 175 U.S.A. New Mexico Colfax Vermejo Park Ranch: on shoulder of Highway 64 2.0 air mi SW of where highway crosses Van Bremmer Creek; 6.7 air mi NE of Cimarron. -104.801529 36.555305 1942 Dry, open prairie with scattered Yucca intermedia, Psoralidium tenuifolium, and Cylindropuntia imbricata. Stems to ca. 1 meter tall, sap milky; petals and corona rich pink; stamens dull green; stigmas pink; uncommon on road shoulder. Specimen GPS: 36.560524, -104.794106. Phenology: flowering. RM RM 840388 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9210 Ben Legler 2008 7 2 184 U.S.A. New Mexico Colfax Vermejo Park Ranch: along main road in Vermejo Park 1.1 air mi NW of Casa Grande. -104.995277 36.896721 2292 Road shoulder adjacent to fields, moist silty soil, occasionally flooded by irrigation ditch. Petals strongly reflexed, pink; corona light pink; anthers green; styles white; stems to 1 meter tall, forming clumps; local on road shoulder. Specimen GPS: 36.896717, -104.995277. Phenology: flowering. RM RM 840387 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9891 Ben Legler 2008 7 18 200 U.S.A. New Mexico Colfax Vermejo Park Ranch: along banks of the Vermejo River 4 air mi SE of Casa Grande. -104.926285 36.844723 2185 Moist silty soil in river nottoms; dominated by grasses and sedges. Petals dull red, corona light pink; stems to ca. 1 meter tall, unbranched; plants locally common on river bank. Specimen GPS: 36.844746, -104.926285. Phenology: flowering. RM RM 840386 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9899 Ben Legler 2008 7 19 201 U.S.A. New Mexico Colfax Vermejo Park Ranch: at east base of a small hill below water supply tower 1.5 air mi SW of Cimarron. -104.940475 36.504116 1989 Seeps and wet depressions on side of hill, with Juncus spp., Eleocharis macrostachya, Asclepias incarnata, Schoenoplectus spp., and Typha domingensis. Petals reddish-green, reflexed; stems to 80 cm tall; uncommon in moist soil on edge of wet areas. Specimen GPS: 36.503819, -104.940514. Phenology: flowering. RM RM 840385 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10534 Ben Legler 2008 8 10 223 U.S.A. New Mexico Colfax Vermejo Park Ranch: on south side of Vermejo River 2.2 air mi due W of I-25 and 3.5 air mi SW of Maxwell. -104.601631 36.509312 1799 Moist, silty river bottoms with Tamarix chinensis, Helianthus annuus, Kochia scoparia, and Mirabilis nyctaginea. Stems to 1 meter tall, solitary; uncommon. Specimen GPS: 36.513538, -104.601349. Phenology: fruiting. RM RM 828377 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 995 Brian Elliott Kenneth Elliott 1998 6 4 155 U.S.A. Colorado Las Animas Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Purgatoire River; E on County Road 75 from Exit 18 on I-25. -104.4574 37.2146 1789 Riparian. Phenology: flowering. RM RM 938237 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4218 Emily Elliott Brian Elliott 2007 8 3 215 U.S.A. Montana Sweet Grass Along Airport Road, NE of Big Timber Airport, ca 1.5 air mi SSW of Big Timber. -109.9654 45.815 1347 Along road cut and packing area, in cobbley soil. Phenology: fruiting. RM RM 938236 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4276 Emily Elliott Brian Elliott 2007 8 3 215 U.S.A. Montana Park Absaroka Range: between I-90 and the Yellowstone River in McAdows Canyon, ca 14.5 air mi ENE of Livingston. -110.2621 45.7014 4280 Disturbed roadside, railroad tracks and river bank. Phenology: fruiting. RM RM 938235 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 85812 Ronald L. Hartman 2007 6 17 168 U.S.A. Montana Carbon 0.5 air mi S of Columbus on Mont Hwy 78 at Itch-kep-pe Park along the Yellowstone River. -109.2521 45.6284 1088 Along river and throughout park. Phenology: flowering. RM RM 828368 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1704 Charity Hall Brian Jacobs and Alex Morgan 1998 6 29 180 U.S.A. Colorado Pueblo Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: San Isabel National Forest: across from Lake Isabel. -105.0357 37.9913 2560 2606 Along slope and stream across from lake; dominant species: Salix, Equisetum, and ponderosa. Phenology: flowering. RM RM 828367 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2093 Charity Hall Brian Jacobs and Alex Morgan 1998 7 10 191 U.S.A. Colorado Las Animas Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Culebra Range: North Fork State Wildlife Area: off of Forest Road 34 from Colo Hwy 12. -105.056 37.2437 2652 2675 Forest and open meadow; fine-grained soil; dominant species: aspen, oak, and ponderosa. Phenology: flowering. RM RM 915325 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8069 Laura E. Lukas 2008 8 13 226 U.S.A. Wyoming Albany Medicine Bow Mountains: Game and Fish Trail 386 W, on west slope of Sheep Mountain, ca 27 air mi W of Laramie; ca 4 air mi NW of Woods Landing. -106.0682 41.1416 2460 Roadside in sagebrush steppe. Phenology: flowering. RM RM 828370 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 61202 Ronald L. Hartman 1998 6 15 166 U.S.A. Colorado Pueblo Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: old highway at Stem Beach exit of I-25. -104.5233 38.1664 1493 Disturbed roadside. RM RM 828369 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 61682 Ronald L. Hartman 1998 6 19 170 U.S.A. Colorado Custer Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountain Valley: ca 0.2-0.5 air mi NE of Silver Cliff along County Road 255. -105.4383 38.1372 2408 2439 Grasslands. RM USFS 885426 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 78249 B. E. Nelson 2009 7 26 207 U.S.A. Montana Powder River 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. -106.2469 45.3105 1176 Banks of reservoir, adjacent slopes, and dam. Phenology: flowering. RM USFS 885425 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 78427 B. E. Nelson 2009 7 30 211 U.S.A. South Dakota Harding Custer National Forest: North Cave Hills: Browns Pond and vicinity on Campbell Creek, ca 6.5 air mi WSW of Ludlow; ca 15 air mi N of Buffalo. -103.4983 45.7949 884 896 Weedy slopes and flats above the reservoir. Phenology: flowering. RM USFS 883237 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2010 Hans Hallman 2009 7 12 193 U.S.A. South Dakota Harding Custer National Forest: West Short Pine Hills: in and around generally west-facing draws ca 2.5 air mi SSW of JK Butte, ca 10 air mi SSE of Camp Crook. -103.945 45.4253 1109 1158 Flowing water draw dominated by green ash and sedges. Phenology: flowering. RM USFS 885429 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2972 Hans Hallman 2009 7 26 207 U.S.A. South Dakota Harding 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. -103.1062 45.3508 1000 1030 Large draw dominated by green ash, snowberry, and sedges. Phenology: flowering. RM USFS 885428 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3027 Hans Hallman 2009 7 26 207 U.S.A. Montana Carter 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. -104.2355 45.7857 975 1006 East-facing rocky slope with mix of ponderosa pine, green ash, and hardwood shrubs. Phenology: flowering. RM USFS 883238 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4549 Hans Hallman G. Gust 2009 8 18 230 U.S.A. Montana Carter Custer National Forest: Ekalaka Hills: in and around McNab Pond, at terminus of Forest Road 1401, ca 0.5 air mi NE of Mont Hwy 323, ca 7 air mi SE of Ekalaka. -104.4314 45.8362 1042 1073 In and around pond dominated by Scirpus and Typha spp. and grasses on its margin. Phenology: fruiting. RM RM 666694 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6667 Amy J. Roderick 1998 7 18 199 U.S.A. Wyoming Natrona Upper North Platte and Laramie River Drainages: Blue Gulch N of Wyo Hwy 220, ca 3.2 air mi NW of Alcova townsite. -106.7474 42.5986 1737 Sagebrush-rabbitbrush draw with black shale slopes. Phenology: flowering & fruiting. RM RM 121659 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. J. W. Blankinship 1901 7 14 195 U.S.A. Montana Crow Agency. Phenology: fruiting. RM RM 355064 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 834 Ellen Collins 1983 7 13 194 U.S.A. Montana Big Horn Afterbay Area. -107.9384 45.3106 1 975 Brushy slopes to riparian edge. Phenology: buds. RM RM 121661 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. J. W. Blankinship 1901 6 11 162 U.S.A. Montana Gilbertson. Phenology: flowering. RM RM 310197 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 559 L. M. Umbach 1903 7 28 209 U.S.A. Montana Glacier Midvale [now East Glacier Park]. Bluffs. Phenology: flowering. RM RM 547104 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 14930 Dieter H. Wilken 1988 6 27 179 U.S.A. Montana Lake N side of Wildhorse Island W side of Flathead Lake. -114.1879 47.8403 1 900 Open sites among Pinus ponderosa along lakeshore. Uncommon. Phenology: flowering. RM RM 121658 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. Dr. Wilcox 1898 7 25 206 U.S.A. Montana Three Forks. Phenology: flowering. RM USFS 491016 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. W-119 E. J. Woolfolk 1937 6 28 179 U.S.A. Montana Custer US Livestock and Range Experiment Station: draw in southwest corner of Pasture N. 823 Phenology: flowering & fruiting. RM USFS 490986 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1594 C. H. Macdonald 1959 7 5 186 U.S.A. Montana Ravalli Bitterroot National Forest: 1/2 mi north of Corvallis. 1006 Level ground; roadside with weeds and grass including thistle, quack grass, knapweed, rush; sandy clay soil. On numerous old fields and side roads. Phenology: flowering. RM RM 121650 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. J. W. Blankinship 1903 8 25 237 U.S.A. Montana Phillips Malta. Phenology: fruiting. RM RM 121649 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. Dr. Wilcox 1898 7 25 206 U.S.A. Montana Three Forks. Phenology: flowering. RM RM 121660 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. J. W. Blankinship 1900 7 29 210 U.S.A. Montana Craig. Phenology: flowering. RM RM 89576 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 728 J. W. Blankinship 1905 7 16 197 U.S.A. Montana Deer Lodge Anaconda. 1524 Alkaline swamps. Phenology: flowering. RM RM 61794 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 128 S. A. Skinner U.S.A. South Dakota no county Alluvial soil near water. Phenology: flowering. RM RM 61805 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 287 S. A. Skinner U.S.A. South Dakota no county Damp places in cultivated soil. Phenology: flowering. RM RM 234371 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1 L. R. M. 1895 6 20 171 U.S.A. South Dakota Brookings Brookings Low grounds. Phenology: flowering. RM RM 398833 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 53 Karin M. Guernsey 1987 7 1 182 U.S.A. Nebraska Kimball Along Lodgepole Creek, 1.7 air mi NNE of Pine Bluffs, just E of road dividing S11 and S12. 1368 North side of creek in wet meadow 1st terrace. Phenology: flowering. RM RM 238573 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. F. W. Peterson U.S.A. Nebraska Kearney Miden. Phenology: flowering. RM RM 310652 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. J. Lunell 1909 8 20 232 U.S.A. North Dakota Benson Leeds. Phenology: fruiting. RM RM 35558 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 62 J. Kildahl 1900 6 29 180 U.S.A. North Dakota Maza. Near lake. Phenology: flowering & fruiting. RM RM 154216 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 377 H. F. Bergman 1911 6 27 178 U.S.A. North Dakota Valley City. In ditch along railroad. Phenology: flowering. RM RM 39236 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. J. Lunell 1902 9 8 251 U.S.A. North Dakota Ramsey Devils Lake. In thickets. Phenology: flowering & fruiting. RM RM 548714 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5274 Thomas G. Lammers 1983 8 10 222 U.S.A. North Dakota Grand Forks Grand Forks, along railroad tracks S of 32nd Ave. S, 1 mi W of Interstate 29. Degraded mesic prairie. Corona white, corolla dark pink. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5546 Hans Hallman 2010 6 30 181 U.S.A. Montana Powder River Ca 1 air mi N of Belle Creek Road, ca 4 air mi E of its junction with Mont Hwy 59, ca 19 air mi SSE of Broadus. -105.2449 45.1976 1036 1091 Grass and sagebrush-dominated grazing land with some moist draws and scattered small areas of badlands. Phenology: flowering. RM RM 830012 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10247 Brian Elliott Pete Schneider 1999 7 31 212 U.S.A. Colorado Costilla [location and coordinates withheld] 2347 Riparian (irrigation ditch). Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 5974 Hans Hallman 2010 7 8 189 U.S.A. Montana Powder River Along Powderville Road East in vicinity of Oliphant Butte, ca 31-33 air mi WSW of Ekalaka. -105.1225 45.6831 871 Stream bank dominated by Juncus and grasses. Phenology: flowering. RM RM 830011 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10292 Brian Elliott Pete Schneider 1999 7 31 212 U.S.A. Colorado Huerfano [location and coordinates withheld] 1966 Around a large pond; riparian. Phenology: fruiting. RM USFS 885427 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7091 Hans Hallman 2010 7 30 211 U.S.A. Montana Powder River 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. -106.1179 45.2869 East-facing slope in hardwood draw with Prunus and grass-dominated understory. Phenology: fruiting. RM RM 841044 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 477 Bethany Lewis 2007 7 28 209 U.S.A. Wyoming Albany Laramie Plains: Bamforth National Wildlife Refuge: ca 7 air mi NW of Laramie. -105.754867 41.371517 2164 Irrigation ditch, greasewood/grassland uplands. 7.5' Laramie SW Quad Phenology: flowering. RM RM 830010 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10535 Brian Elliott Elizabeth Mark 1999 8 7 219 U.S.A. Colorado Las Animas Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: along Purgatorie River, north end of Trinidad. -104.4936 37.1854 1829 Riparian, ditch, wetlands. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2483 Michael K. Kirkpatrick 2010 7 6 187 U.S.A. Colorado Pitkin [location and coordinates withheld] 2118 Wet meadow fed by hot springs. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 80889 B. E. Nelson 2010 8 1 213 U.S.A. Montana Phillips Along North Forks Road, ca 11 air mi NE of Whitewater; ca 36 air mi NNE of Malta. -107.5169 48.8144 823 847 Farmland abandoned in the 1930's and seeded with crested wheatgrass. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 81374 B. E. Nelson 2010 9 19 262 U.S.A. Montana Valley Charles M. Russell National Wildlife Refuge: The Pines Recreation Area: end of Fifth Ridge at Fort Peck Lake, ca 15 air mi SW of Fort Peck; ca 26.5 air mi S of Glasgow. -106.6128 47.8205 676 689 Flats and low slope along the beach. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2320 Joseph L. M. Charboneau 2010 7 27 208 U.S.A. Montana Valley Bull Pasture Coulee and above, E of Windy Ridge Road, ca 1.5 air mi NE of Erie Reservoir, ca 17 air mi N of Hinsdale; ca 36.5 air mi NNW of Glasgow. -107.0555 48.6347 768 817 Coulee bottom with clay mud. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2770 Joseph L. M. Charboneau 2010 8 3 215 U.S.A. Montana Valley Burnt Lodge Wilderness Study Area: Larb Hills (South): Plum Coulee on Plum Creek Trail, ca 3 air mi SSE of Castle Butte, ca 46 air mi SW of Glasgow. -107.3783 47.7863 765 878 Dry clay above creek bottom. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2904 Joseph L. M. Charboneau 2010 8 5 217 U.S.A. Montana Phillips 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. -107.6745 48.4309 682 685 Levee top. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3020 Joseph L. M. Charboneau 2010 8 8 220 U.S.A. Montana Phillips 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. -108.2545 48.0962 807 810 Moist areas of loamy to clay soil around lake. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3720 Joseph L. M. Charboneau 2010 8 22 234 U.S.A. Montana Phillips 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. -108.0845 48.1641 777 780 Raised levee abutting dry canal. Phenology: fruiting. RM RM 830021 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6838 Brian Elliott Elizabeth Mark 1999 6 11 162 U.S.A. Colorado Costilla Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: County Road 22, ca 2 air mi SSE of San Luis. -105.3958 37.1792 2454 Along the irrigation ditch. Phenology: buds. RM RM 830017 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7414 Brian Elliott Elizabeth Mark 1999 6 18 169 U.S.A. Colorado Las Animas Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: along old railroad bed between Cordova Plaza and Weston. -104.8383 37.1272 2073 Riparian, railroad right-of-way. Phenology: flowering. RM RM 666693 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7018 Amy J. Roderick 1998 7 20 201 U.S.A. Wyoming Carbon 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. -106.8902 42.2385 1786 Greasewood flats at rivers edge; disturbed. Phenology: flowering. RM RM 830016 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8025 Brian Elliott Elizabeth Mark 1999 7 1 182 U.S.A. Colorado Pueblo [location and coordinates withheld] 2073 Aquatic, pondside. Phenology: flowering. RM RM 830015 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8124 Brian Elliott Elizabeth Mark 1999 7 3 184 U.S.A. Colorado Fremont Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: east side of Canon City along U.S. Hwy 50. -105.2248 38.4553 1615 Roadside. Phenology: flowering. RM RM 830014 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8809b Brian Elliott Elizabeth Mark and Kenneth Elliott 1999 7 16 197 U.S.A. Colorado Custer Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountain Valley: ca 7 air mi S of Silver Cliff on County Road 119. -105.4383 38.0351 2451 Roadside ditch and irrigated pasture. Phenology: flowering. RM RM 830013 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8860a Brian Elliott Elizabeth Mark 1999 7 10 191 U.S.A. Colorado Costilla [location and coordinates withheld] 2423 Below dam in ditch. Phenology: flowering. RM RM 666723 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7118 Amy J. Roderick 1998 7 24 205 U.S.A. Wyoming Fremont Upper North Platte and Laramie River Drainages: West Sage Hen Rocks and Creek, ca 16 air mi NE of Jeffrey City. -107.5731 42.6277 2000 Chalky-gravelly hills surrounded by sagebrush-grassland. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7414 Joseph L. M. Charboneau 2011 7 11 192 U.S.A. Montana Phillips Matador Ranch: Coburn Butte and prairie to the E, ca 8.5 air mi WSW of Veseth Reservoir, ca 8.5 air mi ESE of Zortman; ca 40 air mi SSW of Malta. -108.3518 47.8933 954 1146 Coulee bottom snowberry thicket. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7853 Joseph L. M. Charboneau Damien Austin 2011 7 19 200 U.S.A. Montana Phillips American Prairie Reserve: Parrot Coulee at confluence with Beaver Creek, ca 1.5 air mi SW of Veseth Reservoir, ca 16 air mi E of Zortman; ca 36 air mi SSW of Malta. -108.2004 47.8969 829 835 Silty flats above creek bed. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8465 Joseph L. M. Charboneau 2011 7 31 212 U.S.A. Montana Phillips 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. -107.7352 48.3844 682 689 Grasslands with scattered silver sagebrush on loamy soil. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8582 Joseph L. M. Charboneau 2011 8 2 214 U.S.A. Montana Valley 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. -107.2542 47.7396 829 890 Coulee bottom and sides shaded by ponderosa pine forest on the north-facing slopes on sandy to clay soil. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9208 Joseph L. M. Charboneau 2011 8 9 221 U.S.A. Montana Phillips Milk River Dodson Dam Unit Wildlife Management Area: ca 3.5 air mi NW of Dodson; ca 21 air mi WNW of Malta. -108.3086 48.4152 701 707 Wetlands and thickets. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9400 Joseph L. M. Charboneau 2011 8 11 223 U.S.A. Montana Phillips 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. -107.6509 48.406 676 679 Roadside. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 9483 Joseph L. M. Charboneau 2011 8 13 225 U.S.A. Montana Phillips 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. -108.4732 47.6128 695 701 Floodplain with some groves of willows and cottonwoods on silty soil. Phenology: fruiting. RM USFS 898387 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 83645 B. E. Nelson 2011 8 16 228 U.S.A. Colorado Summit Gore Range: Arapaho National Forest: south base of Green Mountain along County Road 30, above Green Mountain Reservoir, ca 22 air mi NE of Silverthorne at I-70. -106.3201 39.8798 2439 Edge of pavement. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1014 Cynthia Villa 2003 7 19 200 U.S.A. Colorado Grand Blue Valley Ranch. 8045 Dry shrub community in stony loam. Phenology: flowering. RM RM 840392 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6315 Ben Legler 2007 7 19 200 U.S.A. New Mexico Colfax Vermejo Park Ranch: along road between Casa Grande and Costilla Lodge 1/2 air mi W of where the Vermejo River passes through The Little Wall. -105.1328056 36.95033333 3 2525 Weedy road shoulder surrounded by flat grassland. Petals pale red, reflexed; corona white with slight pink tinge; stamens dull greenish; several large clumps of stems on road side. Photographed. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2010 Hans Hallman 2009 7 12 193 U.S.A. South Dakota Harding Custer National Forest: West Short Pine Hills: in and around generally west-facing draws ca 2.5 air mi SSW of JK Butte, ca 10 air mi SSE of Camp Crook. -103.945 45.4253 1109 1158 Flowing water draw dominated by green ash and sedges. Phenology: flowering. RM RM 360912 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4248 Erwin F. Evert 1982 7 15 196 U.S.A. Wyoming Park Absaroka Mountains: North Fork Shoshone River Drainage: 1/4 mi E of Nameit Creek, along U.S. Hwy 14, ca 25 mi W of Cody. 1798 Phenology: buds. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8705 Lori E. Brummer 2012 6 14 166 U.S.A. Colorado Delta North Fork Valley: along side road between Bowie and Colo Hwy 133, ca 6 air mi NE of Paonia. -107.5079 38.9218 1812 Roadside along irrigation ditch. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 11750 Lori E. Brummer 2012 9 10 254 U.S.A. Colorado Delta Gunnison Gorge Wilderness: West River Trail from wilderness boundary S to where trail ends at cliff, ca 3/4 trail mi from wilderness boundary, ca 7.5 air mi SW of Hotchkiss. -107.8367 38.7489 1567 1582 Riparian area in sparse pinyon/juniper/shrub/rock mix. Phenology: fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 12122 Lori E. Brummer 2012 9 19 263 U.S.A. Colorado Montrose Uncompahgre Plateau: Roubideau Canyon; middle canyon just NW of Camel Back, ca 17 air mi NW of Montrose. -108.1823 38.5611 1707 1719 Low elevation riparian area. Phenology: fruiting. RM RM 830009 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 66468 Ronald L. Hartman 1999 8 22 234 U.S.A. Colorado Saguache Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Cochetopa Hills: Dry Gulch Road. -106.241 38.1411 2500 2835 Volcanics. Phenology: fruiting. RM RM 663225 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1304 C. H. Refsdal 1994 6 30 181 U.S.A. Wyoming Sweetwater Basins and Mountains of Southwest Wyoming: Flaming Gorge National Recreation Area: ca 8 air mi SE of Buckboard Crossing; ca 9.1 road mi S of Buckboard Road on Wyo Hwy 530, then 1.3 road mi E of Wyo Hwy 530. -109.5754 41.1403 1 1850 1859 Tamarix invading shoreline; rabbitbrush-sagebrush community on edge of lakeshore; gentle slopes. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6625 Joshua J. Irwin 2011 7 22 203 U.S.A Idaho Butte Little Lost River Valley: irrigation ditch at the base of the East Canyon alluvial fan, 22.1 air mi NE of Arco. -112.96643 43.84546 30 1488 25-75 plants estimated in mesic soil within herbaceous riparian vegetation, no slope, alluvial geology. 25-75 plants estimated. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7102 Joshua J. Irwin 2011 7 31 212 U.S.A Idaho Lemhi Salmon National Forest: Salmon Wild and Scenic River: Salmon River Road N of Hale Gulch, 4.0 air mi ENE of Shoup. -114.20613 45.40418 30 1085 <25 plants estimated in xeric soil within grassland vegetation, 13 degree slope, SW aspect, peraluminous granite geology. Phenology: fruiting. RM RM 663223 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1585 C. H. Refsdal 1994 7 6 187 U.S.A. Wyoming Sweetwater 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. -109.8277 41.9041 1 1899 Irrigation ditch for wetland ponds. Phenology: flowering. RM RM 914521 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10864 Robert D. Dorn 2013 8 14 226 U.S.A. Wyoming Goshen Ca 13 mi WSW of Torrington. -104.455 41.988333 1310 Roadside with Bromus. Flowers pink-lavender. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6502 Emma E. Freeland 2013 6 29 180 U.S.A. Montana Madison Jefferson River: Silver Star Fishing Access, ca 10 air mi N of Twin Bridges, on Mont Hwy 41. -112.2847 45.6865 1378 Disturbed ground at a fishing access parking lot. Phenology: flowering. RM RM 663222 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2164 C. H. Refsdal 1994 7 27 208 U.S.A. Wyoming Sweetwater [location and coordinates withheld] 1873 Shoreline and uplands of river; alternating sand and clay sediments. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 2366 C. H. Refsdal Duane Atwood and Lucy Jordan 1994 8 2 214 U.S.A. Utah Daggett Southwestern Wyoming and Adjacent Utah: Grasshopper Island in the Green River, ca 11 air mi E of Dutch John. -109.2902 40.9088 1 1664 Shoreline. Phenology: flowering & fruiting. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 830 Lori E. Brummer 2010 7 2 183 U.S.A. Colorado Delta Gunnison Gorge Wilderness: Ute Trail to Gunnison River, ca 13 air mi ESE of Delta. -107.8639 38.6823 1603 1987 Riparian area along river. Phenology: flowering. RM RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 7066 Lori E. Brummer 2011 8 14 226 U.S.A. Colorado Montrose Uncompahgre Plateau: BLM lands off of H54 Road, ca 12 air mi S of Delta. -108.0746 38.5768 1728 Along irrigation ditch in desert scrub. Phenology: fruiting. RM RM 921241 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 11267 Robert D. Dorn 2014 6 30 181 U.S.A. Wyoming Niobrara Ca 5 mi NE of Mule Creek Junction. -104.136667 43.411667 1128 Sandy bank, with Helianthus and Melilotus. Flowers pink. Phenology: flowering & fruiting. RM RM 921478 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 11473 Robert D. Dorn 2014 7 28 209 U.S.A. Wyoming Albany Ca 6 mi SE of Esterbrook. -105.318333 42.326667 1 1920 Roadside, with Grindelia and Setaria. Flower white with lavender tinge. Phenology: flowering. RM RM 937728 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 11752 Robert D. Dorn 2016 7 12 194 U.S.A. South Dakota Fall River Ca 2 mi NE of Edgemont. -103.808333 43.316667 1036 Ditch between highway and railroad; with Bromus, Ambrosia. Plant 1 m high. Phenology: flowering. RM RM 576950 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 113 Jane M. Struttmann 1992 6 30 182 U.S.A. Wyoming Fremont Wind River Basin: ca 6.5 mi SE of Lander. 1658 Roadside. Phenology: flowering. RM RMRS 392238 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. Harold F. Eppson 1950 9 8 251 U.S.A. Wyoming Park Near Powell. Phenology: fruiting. RM RMRS 392241 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 57-240 C. S. Gilbert Harold F. Eppson 1957 7 7 188 U.S.A. Wyoming Johnson 6 mi E of Buffalo on U.S. Hwy 16. Phenology: flowering. RM RM 354450 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 223 Yoshiko Akashi 1982 6 21 172 U.S.A. Wyoming Fremont E of the city water facilities. 1567 In the field, close to the ditch. Phenology: flowering. RM RM 288309 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 906a Wilhelm G. Solheim 1935 8 18 230 U.S.A. Wyoming Big Horn Lovell. 1158 Phenology: vegetative only. RM RM 38255 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3527 Frank Tweedy 1900 6 15 166 U.S.A. Wyoming Johnson Between Sheridan and Buffalo. 1067 1524 Rolling plains. RM RM 398277 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1571 Ruth O' Brien 1987 6 25 176 U.S.A. Wyoming Big Horn Bighorn Basin: ca 3 mi E of Shell at Iowa State University Geology Field Camp. 4300 Along brushy fencerow Phenology: flowering. RM RM 69256 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 242 Vie Willits 1909 7 7 188 U.S.A. Wyoming Central Little Goose. Semi-moist clay banks RM RM 293368 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 25b R. E. Ries D. W. Sabinske 1973 7 24 205 U.S.A. Wyoming Campbell Black Thunder Mining Area: North Prong of Thunder Creek and Little Thunder Creek. 1411 Stream flood plain; with saltgrass, Western wheatgrass. blue gramma; Loamy, bare, clayey soil, Absted and Bone Series. Phenology: flowering. RM USFS 115490 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. s.n. Frank L. Moore C. E. Moore 1896 7 2 184 U.S.A. Wyoming Big Horn Shell. RM RM 544331 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 552 Jan Pollet 1989 8 26 238 U.S.A. Wyoming Platte Along west bank of Glendo Reservoir and below Glendo Dam, 3 road mi E of Glendo. 1437 Bank of reservoir, above dam. Phenology: vegetative only. RM RM 616230 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 162 Tricia Hatle 1990 7 12 193 U.S.A. Wyoming Fremont Below old Riverton city dump. 1493 Moist and dry areas. RM RM 371114 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4382 Hollis Marriott 1983 7 12 193 U.S.A. Wyoming Crook [location and coordinates withheld] 1219 Deciduous woods along creek. Phenology: fruiting. RM RM 382677 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 10522 Hollis Marriott 1986 7 29 210 U.S.A. Wyoming Fremont Lysite Badlands between Moneta-Lysite Road (W of) and upper Day Gulch. -107.746 43.221 1707 Wash. Phenology: fruiting. RM RM 383984 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4533 Robert D. Dorn 1986 9 19 262 U.S.A. Wyoming Lincoln 2012 Roadside, with Salsola, Chrysothamnus. 6 dm high. Phenology: fruiting. RM RM 981697 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4803 Bonnie Heidel 2018 8 11 223 U.S.A. Wyoming Albany West slope Laramie Range: ca 0.5 mi N of U.S. Hwy 30, ca 2.6 air mi E of downtown Laraime. -105.5447 41.3135 2225 Dry creekbank, sandy loam; with Heterotheca villosa, Elymus lanceolatus. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6304 C. H. Refsdal 1995 7 31 212 U.S.A. Utah Uintah Southwestern Wyoming and Adjacent Utah: Browns Park: Sears Canyon, ca 12.5 air mi SE of Dutch John. -109.1755 40.8363 1 1890 1957 Red sandy soils, sandstone cliffs, juniper/pinyon, pine, cottonwood. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 6363 C. H. Refsdal Barbara McNight 1995 8 1 213 U.S.A. Utah Daggett Southwestern Wyoming and Adjacent Utah: Browns Park: Green River, ca 13 air mi ESE of Dutch John; 1.8 mi S of junction of Jarvie Ranch/Browns Park roads on west side Browns Park Road. -109.1373 40.8798 1 1646 1670 River's edge, river rock, clay soils. Phenology: flowering. RM RM 666722 Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 8160 Amy J. Roderick 1998 8 13 225 U.S.A. Wyoming Carbon Upper North Platte and Laramie River Drainages: Miracle Mile on North Platte River, ca 1.5 air mi NNE of Kortes Dam. -106.8707 42.1952 1829 Along river; willow, cottonwood, and limber pine common. Phenology: flowering & fruiting. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 1283 Timothy W. Chumley 1995 6 30 181 U.S.A. Colorado Fremont East-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: Parkdale Recreation Area off U.S. Hwy 50 along the south bank of the Arkansas River, ca 11.4 air mi WNW of Canon City. -105.3931 38.4832 1 1753 1762 Along the banks of the river. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 3442 Timothy W. Chumley 1996 5 31 152 U.S.A. Colorado El Paso [location and coordinates withheld] 1859 Waste ground along roadside and railroad tracks. Phenology: buds. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4529 Timothy W. Chumley 1996 7 14 196 U.S.A. Colorado Fremont East-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: East Gulch: along East Gulch and surrounding slopes and ridges, at end of County Road 27, ca 5.2 air mi N of town of Texas Creek. C1/2 -105.5785 38.4689 2195 2560 Along a small, shaded running strean in pinyon-juniper with occasional ponderosa pine and Douglas fir. Phenology: flowering. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4607 Timothy W. Chumley 1996 7 14 196 U.S.A. Colorado Fremont East-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: along the N bank of the Arkansas River and adjacent uplands off County Road 45, ca 2 air mi NW of Howard. -105.8531 38.4742 2079 2310 Along the banks of the river and adjacent roadside. Phenology: fruiting. RM Asclepias speciosa physical specimen Apocynaceae Asclepias speciosa Torr. 4724 Timothy W. Chumley 1996 7 17 199 U.S.A. Colorado Douglas East-central Colorado: Mosquito Range to Plains: Platte Canyon: along the South Platte River and adjacent canyons and ridges ca 4 air mi NE of town of South Platte. -105.1199 39.4538 1737 2125 Along the banks of the river and an adjacent gravelly flat. Phenology: fruiting. 3600 3,1,0 true