Displaying 1 - 25 out of 321 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Acer negundo L. | F. V. Hayden s.n. | 04 Jun 1853 | United States of America | Nebraska | Bellevue | — |
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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. | — |
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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… | — |
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| Aconitum columbianum Nutt. var. columbianum | F. V. Hayden s.n. | Aug 1871 | United States of America | Wyoming | Teton Co. Yellowstone Lake | — |
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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.… | — |
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| Allium acuminatum Hook. | F. V. Hayden s.n. | Jun 1871 | United States of America | Utah | Weber River Valley. | — |
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| Allium acuminatum Hook. | F. V. Hayden s.n. | Sep 1870 | United States of America | Utah | Uintah Mts. | — |
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| Allium textile A.Nelson & J.F.Macbr. | F. V. Hayden s.n. | s.d. | United States of America | Nebraska | — |
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| Alopecurus magellanicus Lam. | F. V. Hayden s.n. | 20 Jun 1860 | — | — | Henry's Fork of Snake River. | — |
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| Amaranthus blitoides S.Watson | F. V. Hayden s.n. | 1858 | United States of America | Nebraska | — |
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| Amaranthus rudis J.D.Sauer | F. V. Hayden s.n. | Aug 1870 - Sep 1870 | United States of America | — | Rocky Mountains | — |
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| Ambrosia psilostachya DC. | F. V. Hayden s.n. | 12 Jul 1853 | United States of America | Nebraska | [illegible] | — |
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| Amorpha canescens Pursh | F. V. Hayden s.n. | 28 Jun 1853 | United States of America | Nebraska | Sage Creek near Bad Lands | — |
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| Amorpha fruticosa L. | F. V. Hayden s.n. | 1853 - 1854 | United States of America | Nebraska | Yellow Stone | — |
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| Amorpha nana Nutt. | F. V. Hayden s.n. | 1853 - 1854 | United States of America | Nebraska | Fort Pierre | — |
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| Andropogon gerardii Vitman | F. V. Hayden 3 | 07 Jul 1853 | United States of America | Nebraska | Fort Berthold | — |
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| Androsace filiformis Retz. | F. V. Hayden s.n. | Jun 1871 | United States of America | Idaho | Rocky Mtns. | — |
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| Anemone multifida Poir. var. multifida | F. V. Hayden s.n. | Jun 1871 | United States of America | Idaho | Rocky Mtns. | — |
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| Antennaria dimorpha (Nutt.) Torr. & A.Gray | F. V. Hayden s.n. | May 1853 - May 1854 | United States of America | Nebraska | Badlands | — |
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| Anthoxanthum nitens (Weber) Y.Schouten & Veldkamp | F. V. Hayden s.n. | 21 Jun 1860 | United States of America | Nebraska | near Lake Fork | — |
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| Anticlea elegans (Pursh) Rydb. | F. V. Hayden s.n. | Aug 1870 - Sep 1870 | — | — | Rocky Mts | — |
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| Arabis glabra (L.) Bernh. | F. V. Hayden s.n. | Sep 1870 | United States of America | Wyoming | Henry's Fork of Green River,… | — |
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| Aristida purpurea var. longiseta (Steud.) Vasey | F. V. Hayden 2 | 1853 - 1854 | United States of America | Nebraska | Ft. Pierre | — |
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| Aristida purpurea var. longiseta (Steud.) Vasey | F. V. Hayden 3 | 07 Jun 1855 | United States of America | Nebraska | Ft. Pierre | — |
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| Aristida purpurea var. longiseta (Steud.) Vasey | F. V. Hayden s.n. | 1853 - 1854 | United States of America | Nebraska | Badlands | — |
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