Displaying 1 - 75 out of 322 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Astragalus convallarius Greene var. convallarius | F. V. Hayden s.n. | Jun 1871 | United States of America | Utah | Weber Co. Ogden, Utah T. | — | 803094 |
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| Draba albertina Greene | F. V. Hayden s.n. | 1870 | United States of America | Utah | Uintah Co. Uintah Mountains | — | 90208 |
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| Trifolium haydenii Porter | F. V. Hayden s.n. | 25 Jun 1871-30 Jun 1871 | United States of America | Montana | M.T. [=Montana Territory] Rocky Mountains,… | isolectotype | 33722 |
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| Heuchera rubescens Torr. | F. V. Hayden s.n. | Jun 1871 | United States of America | Utah | Ogden, Utah Territory | — | 783401 |
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| Linum kingii var. sedoides Porter | F. V. Hayden s.n. | 1870 | United States of America | Utah | Uintah Mtns. | isotype | 388349 |
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| Minuartia rubella (Wahlenb.) Hiern | F. V. Hayden s.n. | 1870 | United States of America | — | Uintah Mountains | — | 446253 |
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| Minuartia rubella (Wahlenb.) Hiern | F. V. Hayden s.n. | 25 Sep 1870 | United States of America | Wyoming | Uinta Mountains | — | 446254 |
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| Silene menziesii Hook. | F. V. Hayden s.n. | June 1871 | United States of America | Idaho | Rocky Mountains | — | 453071 |
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| Euphorbia petaloidea var. nicolletii Engelm. | F. V. Hayden | 1853-1854 | United States of America | Nebraska | Yellowstone Country | holotype | 263168 |
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| Penstemon eriantherus var. redactus Pennell & D.D.Keck | F. V. Hayden s.n. | 1871 | United States of America | Montana | Stinking Water Creek | — | 593179 |
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| Penstemon eriantherus var. redactus Pennell & D.D.Keck | F. V. Hayden s.n. | 03 Jul 1871 | United States of America | Montana | Stinking Water Creek | — | 593182 |
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| Drepanocladus aduncus (Hedw.) Warnst. | F. V. Hayden | 10 Jul 1855 | United States of America | — | Fort Clark on Upper Missouri. | — | 575981 | ||
| Penstemon procerus Graham var. procerus | F. V. Hayden s.n. | Jul 1872-Aug 1872 | United States of America | — | Yellowstone Lake | — | 639848 |
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| Penstemon fruticosus (Pursh) Greene var. fruticosus | F. V. Hayden s.n. | Jul 1871-Aug 1871 | United States of America | Wyoming | Yellowstone Lake | — | 594586 |
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| Penstemon angustifolius Nutt. ex Pursh var. angustifolius | F. V. Hayden s.n. | 1853-1854 | United States of America | Nebraska | Eaglenest Butte | — | 569809 |
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| Penstemon angustifolius Nutt. ex Pursh var. angustifolius | F. V. Hayden s.n. | 25 May 1871-30 May 1871 | United States of America | Wyoming | Cheyenne | — | 569855 |
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| Penstemon albidus Nutt. | F. V. Hayden s.n. | 21 Jul 1853 | United States of America | Nebraska | Fort Pierre | — | 541691 |
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| Bistorta bistortoides (Pursh) Small | F. V. Hayden s.n. | 24 Jul 1871 | United States of America | — | Hot Sulphur Springs, Upper Yellowstone | — | 407567 |
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| Penstemon glaber Pursh var. glaber | F. V. Hayden 3 | Jul 1854 | United States of America | Nebraska | Fort Clark | — | 595806 |
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| Ephedra viridis Coville | F. V. Hayden s.n. | Oct 1870 | United States of America | Wyoming | Henry's Fork, Wyoming Territory | — | 70670 |
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| Penstemon digitalis Nutt. ex Sims | F. V. Hayden s.n. | 1853-1854 | United States of America | Nebraska | Fort Leavenworth | — | 592091 |
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| Carex hallii Olney | F. V. Hayden s.n. | Jun 1871 | United States of America | Idaho | Rocky Mountains. | lectotype | 11135 | ||
| Hedysarum boreale Nutt. var. boreale | F. V. Hayden s.n. | Jun 1871 | United States of America | Utah | Utah Territory. | — | 704450 |
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| Lupinus pusillus var. intermontanus (A.Heller) C.P.Sm. | F. V. Hayden s.n. | Jun 1871 | United States of America | Utah | Ogden, Utah T. | — | 747800 |
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| Sedum lanceolatum Torr. | F. V. Hayden s.n. | 25 Sep 1870 | United States of America | Utah | Uinta Mountains | — | 758062 |
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| Solanum triflorum Nutt. | F. V. Hayden s.n. | 1853 - 1854 | United States of America | Nebraska | Fort Union | — | 00820281 |
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| Sedum rhodanthum A.Gray | F. V. Hayden s.n. | 1870 | United States of America | Utah | Uintah Mountains | — | 758159 |
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| Solanum rostratum Dunal | F. V. Hayden s.n. | 1853-4 | United States of America | Nebraska | Fort Pierre etc. | — | 00820878 |
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| Petrophytum caespitosum (Nutt.) Rydb. | F. V. Hayden s.n. | 07 Sep 1871 | United States of America | — | Between Madison & Jefferson Rivers,… | — | 758855 |
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| Potentilla biennis Greene | F. V. Hayden s.n. | Jun 1871 | United States of America | Utah | Ogden, Utah Ter. | — | 831690 |
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| Potentilla pulcherrima Lehm. | F. V. Hayden s.n. | Jul 1871 | United States of America | — | Mt. Ellis to the Yellowstone… | — | 832972 |
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| Ivesia gordonii (Hook.) Torr. & A.Gray | F. V. Hayden s.n. | Oct 1870 | United States of America | Wyoming | Lincoln Co. Henry's Fork of… | — | 833793 |
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| Geum rossii var. turbinatum (Rydb.) C.L.Hitchc. | F. V. Hayden s.n. | 25 Sep 1870 | United States of America | Wyoming | Uinta Mountains | — | 847862 |
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| Cercocarpus ledifolius var. intermontanus N.H.Holmgren | F. V. Hayden s.n. | 03 Jul 1871 | United States of America | — | Stinking Water Creek | — | 848676 |
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| Chamerion angustifolium (L.) Holub | F. V. Hayden s.n. | 25 Sep 1870 | United States of America | Utah | Uintah Mountains | — | 00999761 |
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| Eremogone congesta (Nutt.) Ikonn. var. congesta | F. V. Hayden s.n. | 1870 | United States of America | Utah | Uintah Mountains. | — | 01057007 |
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| Hackelia patens (Nutt.) I.M.Johnst. var. patens | F. V. Hayden s.n. | Jun 1871 | United States of America | Utah | Weber Co. Salt Lake -… | — | 01156173 |
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| Lappula redowskii (Hornem.) Greene var. redowskii | F. V. Hayden s.n. | 01 Jun 1981 - 07 Jun 1871 | United States of America | Utah | Weber Co. Ogden and vicinity.… | — | 01156519 |
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| Astragalus adsurgens var. robustior Hook. | F. V. Hayden s.n. | 30 May 1853 - 30 May 1854 | United States of America | Nebraska | From Fort Pierre to Bad… | — | 01203650 |
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| Astragalus agrestis Douglas ex G.Don | F. V. Hayden 358 | Jul 1851 | United States of America | Nebraska | Fort Pierre & Fort Union | — | 01214878 |
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| Eragrostis pectinacea (Michx.) Nees | F. V. Hayden s.n. | 1869-60 | United States of America | — | To the Head Waters of… | — | 1699709 |
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| Agastache urticifolia (Benth.) Kuntze var. urticifolia | F. V. Hayden s.n. | 01 Jun 1871 - 07 Jun 1871 | United States of America | Utah | Weber Co. Ogden and vicinity.… | — | 01208049 |
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| Astragalus crassicarpus Nutt. var. crassicarpus | F. V. Hayden s.n. | 28 Jun 1853 | United States of America | Nebraska | Sage Creek | — | 01248000 |
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| Astragalus drummondii Douglas ex Hook. | F. V. Hayden 207 | Sep 1853 - 1854 | United States of America | Nebraska | Fort Union | — | 01248895 |
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| Astragalus flexuosus (Hook.) Douglas ex G.Don var. flexuosus | F. V. Hayden s.n. | 30 Jun 1853 | United States of America | Nebraska | Mauvaises Terres | — | 01249335 |
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| Astragalus gilviflorus E.Sheld. | F. V. Hayden s.n. | May 1853 - 1854 | United States of America | Nebraska | White River Valley | — | 01249758 |
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| Astragalus kentrophyta A.Gray var. kentrophyta | F. V. Hayden s.n. | Jun 1853 - 1854 | United States of America | Nebraska | Yellowstone | — | 01258283 |
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| Astragalus plattensis Nutt. ex Torr. & A.Gray | F. V. Hayden s.n. | 20 Jun 1853 | United States of America | Nebraska | Fort Pierre | — | 01246673 |
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| Dalea enneandra Nutt. | F. V. Hayden | 1853 - 1854 | United States of America | Nebraska | Fort Pierre | — | 01259355 |
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| Astragalus missouriensis Nutt. var. missouriensis | F. V. Hayden s.n. | 12 Jul 1853 | United States of America | Nebraska | Mauvaises Terres | — | 01262046 |
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| Astragalus racemosus Pursh var. racemosus | F. V. Hayden s.n. | 28 Jun 1853 | United States of America | Nebraska | Sage Creek near Bad Lands | — | 01265592 |
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| Astragalus spatulatus E.Sheld. | F. V. Hayden s.n. | May 1871 | United States of America | Wyoming | Laramie Co. Cheyenne, Wyoming Territory | — | 01283077 |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | F. V. Hayden s.n. | May 1855 | United States of America | Nebraska | On Sage Creek, Bad lands. | — | 1553371 |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | F. V. Hayden 19 | 07 Jul 1860 | United States of America | — | To the Head Waters of… | — | 1553587 |
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| Alopecurus magellanicus Lam. | F. V. Hayden s.n. | 20 Jun 1860 | — | — | Henry's Fork of Snake River. | — | 1638293 |
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| Andropogon gerardii Vitman | F. V. Hayden 3 | 07 Jul 1853 | United States of America | Nebraska | Fort Berthold | — | 1639274 |
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| Bouteloua curtipendula (Michx.) Torr. | F. V. Hayden s.n. | s.d. | United States of America | Nebraska | Bad Lands. | — | 1642698 |
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| Bouteloua gracilis (Kunth) Lag. ex Griffiths | F. V. Hayden s.n. | 01 Jul 1859 | United States of America | — | Head of Little Missouri near… | — | 1643421 |
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| Bouteloua gracilis (Kunth) Lag. ex Griffiths | F. V. Hayden s.n. | Jul 1859 | United States of America | — | North Fork of Cheyenne River. | — | 1643545 |
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| Bouteloua hirsuta Lag. | F. V. Hayden 47 | 20 Jul 1934 | United States of America | Nebraska | Loup Fork | — | 1643963 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | F. V. Hayden s.n. | Jul 1855 | United States of America | — | Yellowstone. | — | 1645995 |
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| Galium boreale L. | F. V. Hayden s.n. | 1870 | United States of America | Utah | Uinta Mountains, Hayden [?] | — | 1576593 |
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| Oxytropis lagopus Nutt. | F. V. Hayden s.n. | Jun 1871 | United States of America | Idaho | Rocky Mtns. | — | 1586464 |
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| Muhlenbergia mexicana (L.) Trin. | F. V. Hayden 3 | Aug 1859 | United States of America | Nebraska | Head Waters of the Missouri… | — | 1725483 |
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| Muhlenbergia asperifolia (Nees & Meyen) Parodi | F. V. Hayden s.n. | 24 Jul 1871 | United States of America | Wyoming | Hot Sulphur Springs, upper Yellowstone. | — | 1755557 |
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| Muhlenbergia cuspidata (Torr. ex Hook.) Rydb. | F. V. Hayden 3 | 1855 | United States of America | Wyoming | Yellowstone country | — | 1755933 |
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| Muhlenbergia cuspidata (Torr. ex Hook.) Rydb. | F. V. Hayden s.n. | Aug 1855 | United States of America | Wyoming | Yellowstone country | — | 1755934 |
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| Muhlenbergia frondosa (Poir.) Fernald | F. V. Hayden s.n. | Sep 1860 | United States of America | — | The Head Waters of the… | — | 1756299 |
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| Muhlenbergia pungens Thurb. | F. V. Hayden 3 | 06 Aug 1855 | United States of America | Nebraska | Loup Fork of Platte River | — | 1740999 |
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| Muhlenbergia racemosa (Michx.) Britton, Sterns & Poggenb. | F. V. Hayden s.n. | 1855 | United States of America | Nebraska | Ft. Union. | — | 1741135 |
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| Muhlenbergia torreyi (Kunth) Hitchc. ex Bush | F. V. Hayden 5 | 27 Aug 1871 | United States of America | — | Upper Falls of the Yellowstone. | — | 1759691 |
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| Nassella viridula (Trin.) Barkworth | F. V. Hayden s.n. | Jun 1855 | United States of America | Nebraska | Fort Pierre. | — | 1758386 |
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| Phalaris arundinacea L. | F. V. Hayden s.n. | Aug 1859 | United States of America | — | Big Horn Mountains [Wyoming/Montana]. | — | 1744976 |
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| Phalaris arundinacea L. | F. V. Hayden s.n. | 03 Jul 1871 | United States of America | — | Stinking Water Creek, Montana Ter. | — | 1745008 |
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| Phleum alpinum L. | F. V. Hayden s.n. | 11 Jul 1860 | United States of America | — | Smith's Fork. Head Waters of… | — | 1763364 |
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