Displaying 1 - 50 out of 340 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Abronia elliptica A.Nelson | J. H. Cowen 2110 | 30 Jun 1892 | United States of America | Colorado | Delta Co. dry mesa | — |
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| Acer glabrum Torr. | J. H. Cowen 85 | 24 Jul 1895 | United States of America | Colorado | Larimer Co. Foot-hills | — |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | J. H. Cowen 3418 | 20 Jun 1891 | United States of America | Colorado | Fort Collins. College Farm. | — |
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| Acrolasia gracilis Rydb. | J. H. Cowen s.n. | 01 Jun 1895 | United States of America | Colorado | Larimer Co. | holotype |
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| Allium recurvatum Rydb. | J. H. Cowen s.n. | 15 Jul 1895 | United States of America | Colorado | Larimer Co. | — |
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| Alopecurus aequalis Sobol. | J. H. Cowen 3459 | 24 Jun 1892 | United States of America | Colorado | Hotchkiss | — |
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| Amaranthus blitoides S.Watson | J. H. Cowen 2156 | 29 Jul 1896 | United States of America | Colorado | Larimer Co. | — |
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| Amaranthus blitoides S.Watson | J. H. Cowen s.n. | 29 Jul 1896 | United States of America | Colorado | Larimer Co. | — |
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| Ambrosia psilostachya DC. | J. H. Cowen 3276 | 24 Jul 1896 | United States of America | Colorado | Larimer Co. | — |
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| Ambrosia tomentosa Nutt. | J. H. Cowen 3265 | 19 Jun 1891 | United States of America | Colorado | South Chem. Lab. | — |
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| Ambrosia tomentosa Nutt. | J. H. Cowen 3262 | 08 Jul 1896 | United States of America | Colorado | Larimer Co. College Grounds [label… | — |
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| Ambrosia tomentosa Nutt. | J. H. Cowen 3265 | 19 Jun 1891 | United States of America | Colorado | Larimer Co. College Grounds. South… | — |
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| Androsace septentrionalis L. | J. H. Cowen s.n. | 01 Jun 1895 | United States of America | Colorado | Larimer Co. Foothills | — |
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| Anemone canadensis L. | J. H. Cowen 2 | 13 Jun 1895 | United States of America | Colorado | Larimer Co. | — |
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| Anemone cylindrica A.Gray | J. H. Cowen 3 | 20 Jun 1895 | United States of America | Colorado | Larimer Co. | — |
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| Angelica ampla A.Nelson | J. H. Cowen s.n. | 28 Aug 1896 | United States of America | Colorado | South Park - S. E.… | — |
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| Angelica ampla A.Nelson | J. H. Cowen 1375 | 28 Aug 1896 | United States of America | Colorado | South Park, S. E. of… | — |
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| Angelica grayi (J.M.Coult. & Rose) J.M.Coult. & Rose | J. H. Cowen s.n. | 19 Jul 1898 | United States of America | Colorado | Beaver Cr. | — |
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| Anticlea elegans (Pursh) Rydb. | J. H. Cowen s.n. | 21 Jul 1892 | United States of America | Colorado | Delta Co. Leroux Creek | — |
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| Anticlea elegans (Pursh) Rydb. | J. H. Cowen 2398 | 11 Jul 1897 | United States of America | Colorado | Larimer Co. Rist Canon | — |
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| Arabis hirsuta (L.) Scop. | J. H. Cowen 36 | 15 Jul 1895 | United States of America | Colorado | Larimer Co. Foothills | — |
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| Arenaria fendleri A.Gray var. fendleri | J. H. Cowen s.n. | 28 Aug 1896 | United States of America | Colorado | S. Park, S. E. of… | — |
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| Argemone hispida A.Gray | J. H. Cowen s.n. | 08 Jul 1895 | United States of America | Colorado | Larimer Co. east of College | — |
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| Artemisia cana Pursh | J. H. Cowen 2652 | 27 Aug 1896 | United States of America | Colorado | Summit Co. Breckenridge | — |
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| Asclepias engelmanniana Woodson | J. H. Cowen s.n. | 24 Jul 1893 | United States of America | Colorado | Larimer Co. | — |
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| Asclepias pumila (A.Gray) Vail | J. H. Cowen s.n. | 18 Jul 1893 | United States of America | Colorado | Larimer Co. | — |
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| Asclepias speciosa Torr. | J. H. Cowen s.n. | 01 Jul 1895 | United States of America | Colorado | Larimer Co. | — |
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| Asclepias speciosa Torr. | J. H. Cowen s.n. | 11 Jul 1893 | United States of America | Colorado | — |
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| Asplenium trichomanes L. | J. H. Cowen 3991 | 18 Jun 1896 | United States of America | Colorado | Horsetooth Mt. | — |
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| Astragalus agrestis Douglas ex G.Don | J. H. Cowen s.n. | 19 Jun 1893 | United States of America | Colorado | Fort Collins | — |
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| Astragalus agrestis Douglas ex G.Don | J. H. Cowen s.n. | 06 Jul 1895 | United States of America | Colorado | Fort Collins | — |
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| Astragalus bisulcatus (Hook.) A.Gray var. bisulcatus | J. H. Cowen s.n. | 03 Jun 1893 | United States of America | Colorado | Along R.R., south of College | — |
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| Astragalus bisulcatus (Hook.) A.Gray var. bisulcatus | J. H. Cowen s.n. | 02 Jun 1895 | United States of America | Colorado | Ft. Collins | — |
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| Astragalus bisulcatus (Hook.) A.Gray var. bisulcatus | J. H. Cowen s.n. | 12 Jun 1895 | United States of America | Colorado | Fort Collins | — |
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| Astragalus canadensis L. var. canadensis | J. H. Cowen s.n. | 02 Jul 1895 | United States of America | Colorado | Fort Collins | — |
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| Astragalus canadensis L. var. canadensis | J. H. Cowen 94 | 02 Jul 1895 | United States of America | Colorado | Fort Collins | — |
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| Astragalus drummondii Douglas ex Hook. | J. H. Cowen s.n. | 08 Jul 1895 | United States of America | Colorado | Fort Collins | — |
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| Astragalus missouriensis Nutt. var. missouriensis | J. H. Cowen s.n. | 12 Jun 1895 | United States of America | Colorado | Fort Collins | — |
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| Astragalus mollissimus Torr. var. mollissimus | J. H. Cowen 100 | 12 Jun 1895 | United States of America | Colorado | Dry knoll SE of Ft.… | — |
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| Astragalus mollissimus Torr. var. mollissimus | J. H. Cowen s.n. | 12 Jun 1895 | United States of America | Colorado | Ft. Collins | — |
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| Astragalus shortianus Nutt. ex Torr. & A.Gray | J. H. Cowen s.n. | 26 Apr 1896 | United States of America | Colorado | Larimer Co. Vicinity of Horse-Tooth | — |
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| Astragalus tridactylicus A.Gray | J. H. Cowen s.n. | 26 Apr 1896 | United States of America | Colorado | Vicinity of Horsetooth [SW of… | — |
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| Atriplex canescens (Pursh) Nutt. | J. H. Cowen 2188 | 02 Sep 1897 | United States of America | Colorado | [illegible] | — |
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| Atriplex confertifolia (Torr. & Frém.) S.Watson | J. H. Cowen 2184 | 03 Sep 1897 | United States of America | Colorado | Delta Co. | — |
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| Atriplex corrugata S.Watson | J. H. Cowen 4067 | 05 Sep 1897 | United States of America | Colorado | Delta Co. | — |
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| Atriplex dioica Raf. | J. H. Cowen 2173 | 02 Sep 1895 | United States of America | Colorado | swampy ground | — |
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| Atriplex dioica Raf. | J. H. Cowen 2186 | 03 Sep 1897 | United States of America | Colorado | Delta Co. | — |
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| Atriplex gardneri (Moq.) D.Dietr. | J. H. Cowen 4070 | 02 Jul 1892 | United States of America | Colorado | Delta Co. Hotchkiss & Smith's… | — |
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| Atriplex gardneri (Moq.) D.Dietr. | J. H. Cowen 2177 | 27 Jun 1893 | United States of America | Colorado | Larimer Co. East Fort Collins | — |
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| Atriplex oblanceolata Rydb. | J. H. Cowen 4071 | 03 Sep 1897 | United States of America | Colorado | Delta. | holotype |
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