Displaying 1 - 25 out of 25 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Ambrosia acanthicarpa Hook. | J. H. Cowan 3259 | 03 Sep 1897 | United States of America | Colorado | Delta | — |
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| Antennaria rosea subsp. arida (E.E.Nelson) R.J.Bayer | J. H. Cowan 2609 | 25 Jun 1895 | United States of America | Colorado | Gulch W of Pennock's. | — |
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| Argyrochosma fendleri Windham | J. H. Cowan s.n. | 26 Apr 1896 | United States of America | Colorado | Vicinity of Horsetooth | — |
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| Argyrochosma fendleri Windham | J. H. Cowan s.n. | 26 Apr 1896 | United States of America | Colorado | Vicinity of Horsetooth | — |
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| Astragalus miser var. oblongifolius (Rydb.) Cronquist | J. H. Cowan 13 | 06 Jul 1892 | United States of America | Colorado | Delta Co. Oak mesa | — |
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| Blepharoneuron tricholepis (Torr.) Nash | J. H. Cowan 3451 | 28 Aug 1896 | United States of America | Colorado | South Park, SE of Jefferson,… | — |
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| Descurainia pinnata var. pinnata | J. H. Cowan 54 | 02 Jul 1895 | United States of America | Colorado | Larimer Co. | — |
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| Euthamia occidentalis Nutt. | J. H. Cowan 3126 | 03 Sep 1897 | United States of America | Colorado | Delta. | — |
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| Flaveria campestris J.R.Johnst. | J. H. Cowan 2903 | 09 Sep 1897 | United States of America | Colorado | Mesa Co. | — |
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| Muhlenbergia asperifolia (Nees & Meyen) Parodi | J. H. Cowan 3445 | 29 Aug 1896 | United States of America | Colorado | Larimer Co. | — |
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| Muhlenbergia filiformis (Thurb. ex S.Watson) Rydb. | J. H. Cowan 3432 | 28 Aug 1896 | United States of America | Colorado | South-east of Jefferson | — |
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| Populus tremuloides Michx. | J. H. Cowan 2323 | 11 Jul 1897 | United States of America | Colorado | Rist Canon | — |
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| Porella pinnata L. | J. H. Cowan 72 | 15 Oct 1949 | United States of America | Connecticut | Fairfield Co. Near Saugatuck Reservoir | — | ||||
| Porella pinnata L. | J. H. Cowan 100 | 21 Oct 1949 | United States of America | New Jersey | Passaic Co. Near Pines Lake | — | ||||
| Reboulia hemisphaerica (L.) Raddi | J. H. Cowan 174 | 13 May 1950 | United States of America | New Jersey | Warren Co. Shale slope along… | — | ||||
| Rorippa palustris subsp. hispida (Desv.) Jonsell | J. H. Cowan 51 | 14 Jun 1895 | United States of America | Colorado | Larimer Co. | — |
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| Schizonella subtrifida Ellis & Everh. | J. H. Cowan 213 | 7-25-93 | United States of America | Colorado | Fort Collins | — |
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| Sisyrinchium montanum Greene | J. H. Cowan s.n. | 18 Jun 1896 | United States of America | Colorado | Horsetooth Mountain | — |
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| Symphyotrichum ascendens (Lindl.) G.L.Nesom | J. H. Cowan 2688 | 27 Aug 1896 | United States of America | Colorado | Summit Co. Breckenridge. | — |
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| Symphyotrichum ascendens (Lindl.) G.L.Nesom | J. H. Cowan 2688 | 27 Aug 1896 | United States of America | Colorado | Summit Co. Breckenridge. | — |
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| Symphyotrichum ascendens (Lindl.) G.L.Nesom | J. H. Cowan 2690 | 08 Jul 1895 | United States of America | Colorado | East of College, Fort Collins. | — |
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| Symphyotrichum ascendens (Lindl.) G.L.Nesom | J. H. Cowan 2722 | 02 Sep 1897 | United States of America | Colorado | [Olathic]. | — |
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| Symphyotrichum ciliatum (Ledeb.) G.L.Nesom | J. H. Cowan 2705 | 05 Sep 1897 | United States of America | Colorado | Delta Co. Hotchkiss. | — |
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| Symphyotrichum laeve (L.) Á.Löve & D.Löve var. laeve | J. H. Cowan 2707 | 02 Sep 1893 | United States of America | Colorado | Along Poudre River. | — |
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| Uromyces shearianus Arthur | J. H. Cowan 121 | Jul 1894 | United States of America | — | Delta Co. | — |
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