Displaying 1 - 75 out of 341 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Abronia fragrans Nutt. ex Hook. | C. S. Sheldon 24 6823 | 09 Jul 1884 | United States of America | Colorado | Larimer Co. | — |
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| Acacia angustissima var. hirta (Nutt.) B.L.Rob. | C. S. Sheldon s.n. | 1891 | United States of America | Oklahoma | Ind. Territory | — |
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| Acer glabrum Torr. | C. S. Sheldon s.n. | 14 Jul 1892 | United States of America | Colorado | Chaffee Co. S. Cotonwood gulch | — |
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| Acer glabrum var. neomexicanum (Greene) Kearney & Peebles | C. S. Sheldon s.n. | 15 Jul 1892 | United States of America | Colorado | Chaffee Co. | — |
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| Acer pensylvanicum L. | C. S. Sheldon 495 | 10 Jun 1881 | United States of America | New York | Oswego Co. | — |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | C. S. Sheldon 5804 | 06 Jul 1892 | United States of America | Colorado | Chaffee Co. | — |
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| Aconitum columbianum Nutt. var. columbianum | C. S. Sheldon 140 160 | 29 Jul 1884 | United States of America | Colorado | North Park, near Teller | — |
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| Aconitum columbianum Nutt. var. columbianum | C. S. Sheldon s.n. | 11 Aug 1892 | United States of America | Colorado | Crystal Park near Manitou | — |
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| Agoseris aurantiaca var. purpurea (A.Gray) Cronquist | C. S. Sheldon 123 | 28 Jul 1884 | United States of America | Colorado | North Park, near Teller. Grassy… | — |
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| Agoseris glauca (Pursh) Raf. var. glauca | C. S. Sheldon 106 4971 | 25 Jul 1884 | United States of America | Colorado | North Park near Teller | — |
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| Aliciella pinnatifida (Nutt. ex A.Gray) J.M.Porter | C. S. Sheldon 200 5611 | 09 Aug 1884 | United States of America | Colorado | Middle Park | — |
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| Allium brevistylum S.Watson | C. S. Sheldon 154 8019 | 31 Jul 1884 | United States of America | Colorado | North Park near Teller | — |
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| Allium geyeri S.Watson | C. S. Sheldon 62 | 20 Jul 1884 | United States of America | Wyoming | Laramie Plains, Wyo. Terr. | — |
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| Alyssum alyssoides (L.) L. | C. S. Sheldon | 02 Jun 1880 | United States of America | New York | Tompkins Co. | — |
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| Amorpha canescens Pursh | C. S. Sheldon s.n. | 28 Jun 1887 | United States of America | Missouri | Adair Co. | — |
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| Andropogon gerardii Vitman | C. S. Sheldon 337 | 1891 | United States of America | Oklahoma | Indian Territory | — |
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| Androsace septentrionalis L. | C. S. Sheldon s.n. | 09 Jul 1892 | United States of America | Colorado | Chaffee Co. S. Cottonwood Gulch | — |
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| Androsace septentrionalis L. | C. S. Sheldon 109 5222 | 25 Jul 1884 | United States of America | Colorado | North Park, near Teller. Picked… | — |
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| Androsace septentrionalis L. | C. S. Sheldon 271 5222 | 16 Aug 1884 | United States of America | Colorado | Clear Creek Co. Berthoud Pass… | — |
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| Anemone multifida Poir. var. multifida | C. S. Sheldon s.n. | 14 Jul 1892 | United States of America | Colorado | Chaffee Co. South Cottonwood Gulch | — |
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| Anemone narcissiflora var. zephyra (A.Nelson) B.E.Dutton & Keener | C. S. Sheldon s.n. | 09 Jul 1892 | United States of America | Colorado | Chaffee Co. South Cottonwood Canyon | — |
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| Anemone narcissiflora var. zephyra (A.Nelson) B.E.Dutton & Keener | C. S. Sheldon 121 48 | 28 Jul 1884 | United States of America | Colorado | North Park, near Teller | — |
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| Anemone narcissiflora var. zephyra (A.Nelson) B.E.Dutton & Keener | C. S. Sheldon s.n. | 28 July 188[?] | United States of America | Colorado | — |
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| Anemone parviflora Michx. | C. S. Sheldon 5851 | 09 Jul 1892 | United States of America | Colorado | South Cottonwood Gulch | — |
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| Anemone patens var. multifida Pritz. | C. S. Sheldon s.n. | 14 Jul 1892 | United States of America | Colorado | Chaffee Co. South Cottonwood Gulch | — |
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| Antennaria microphylla Rydb. | C. S. Sheldon s.n. | 27 Jul 1892 | United States of America | Colorado | Chaffee Co. | — |
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| Antennaria microphylla Rydb. | C. S. Sheldon 61 3999 | 20 Jul 1884 | United States of America | Wyoming | Laramie Plains | — |
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| Antennaria rosea Greene | C. S. Sheldon s.n. | 28 Jul 1884 | United States of America | Colorado | North park area, Feller | syntype |
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| Antennaria sordida Greene | C. S. Sheldon s.n. | 28 Jul 1884 | United States of America | Colorado | North Park near Teller | syntype |
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| Aquilegia chrysantha A.Gray | C. S. Sheldon 5850 | 09 Aug 1892 | United States of America | Colorado | El Paso Co. Bear Creek… | — |
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| Aquilegia coerulea var. coerulea | C. S. Sheldon 103 131 | 24 Jul 1884 | United States of America | Colorado | North Park, near Teller | — |
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| Arceuthobium douglasii Engelm. | C. S. Sheldon 5873 | 04 Aug 1892 | United States of America | Colorado | El Paso Co. | — |
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| Arenaria fendleri A.Gray var. fendleri | C. S. Sheldon 215 799 | 14 Aug 1884 | United States of America | Colorado | Middle Park near Cozzens' | — |
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| Arenaria fendleri A.Gray var. fendleri | C. S. Sheldon s.n. | 02 Aug 1892 | United States of America | Colorado | Green Mt. Falls | — |
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| Argemone polyanthemos (Fedde) G.B.Ownbey | C. S. Sheldon 28 | 09 Jul 1884 | United States of America | Colorado | Larimer Co. sterile plains | — |
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| Aristida dichotoma Michx. | C. S. Sheldon 333 | 1891 | United States of America | Oklahoma | Indian Territory | — |
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| Aristida oligantha Michx. | C. S. Sheldon 266 | 1891 | United States of America | Oklahoma | Indian Territory | — |
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| Aristida purpurea Nutt. | C. S. Sheldon 5790 | 20 Jul 1891 | United States of America | Oklahoma | Cotton Co. near Cash Creek.… | — |
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| Aristida purpurea var. fendleriana (Steud.) Vasey | C. S. Sheldon 136 | 1891 | United States of America | Oklahoma | Indian Territory | — |
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| Aristida purpurea var. fendleriana (Steud.) Vasey | C. S. Sheldon 5791 | 12 Jul 1891 | United States of America | Oklahoma | Pontotoc Co. Near Stonewall. Chickasaw… | — |
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| Aristida purpurea var. fendleriana (Steud.) Vasey | C. S. Sheldon 5808 | 06 Jul 1892 | United States of America | Colorado | Chaffee Co. Gravelly Mesas | — |
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| Aristida purpurea var. longiseta (Steud.) Vasey | C. S. Sheldon s.n. | 1891 | United States of America | Oklahoma | Indian Territory | — |
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| Aristida purpurea var. longiseta (Steud.) Vasey | C. S. Sheldon s.n. | 1891 | United States of America | Oklahoma | Indian Territory | — |
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| Artemisia biennis Willd. | C. S. Sheldon 204 | 12 Aug 1884 | United States of America | Colorado | Middle Park. | — |
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| Artemisia campestris var. caudata (Michx.) E.J.Palmer & Steyerm. | C. S. Sheldon s.n. | 27 Jul 1892 | United States of America | Colorado | Chaffee Co. | — |
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| Artemisia dracunculus L. | C. S. Sheldon 196 | 09 Aug 1884 | United States of America | Colorado | Middle Park. | — |
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| Artemisia dracunculus L. | C. S. Sheldon s.n. | 28 Jul 1892 | United States of America | Colorado | Chaffee Co. | — |
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| Artemisia ludoviciana subsp. albula (Wooton) D.D.Keck | C. S. Sheldon s.n. | 10 Aug 1892 | United States of America | Colorado | El Paso Co. Bear Creek… | — |
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| Asclepias asperula (Decne.) Woodson | C. S. Sheldon 5825 | 26 Jul 1892 | United States of America | Colorado | Chaffee Co. Hortense Springs | — |
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| Asclepias hallii A.Gray | C. S. Sheldon 5826 | 05 Jul 1892 | United States of America | Colorado | Chaffee Co. | — |
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| Asclepias pumila (A.Gray) Vail | C. S. Sheldon s.n. | 05 Aug 1892 | United States of America | Colorado | El Paso Co. | — |
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| Asclepias pumila (A.Gray) Vail | C. S. Sheldon 47 5369v.1 | 18 Jul 1884 | United States of America | Colorado | near Fort Collins | — |
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| Asclepias pumila (A.Gray) Vail | C. S. Sheldon 47 | 18 Jul 1884 | United States of America | Colorado | Foothills, near Fort Collins | — |
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| Asclepias verticillata L. | C. S. Sheldon s.n. | 13 Jun 1891 | United States of America | Texas | Grayson Co. | — |
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| Astragalus adsurgens var. robustior Hook. | C. S. Sheldon s.n. | 20 Jul 1884 | United States of America | Wyoming | Laramie Plains | — |
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| Astragalus agrestis Douglas ex G.Don | C. S. Sheldon 54 | 19 Jul 1884 | United States of America | Wyoming | Laramie Plains | — |
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| Astragalus agrestis Douglas ex G.Don | C. S. Sheldon s.n. | 04 Jul 1892 | United States of America | Colorado | Chaffee Co. Buena Vista | — |
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| Astragalus alpinus L. var. alpinus | C. S. Sheldon 122 | 26 Jul 1884 | United States of America | Colorado | North Park, near Feller | — |
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| Astragalus distortus Torr. & A.Gray var. distortus | C. S. Sheldon 1728 | 05 Jun 1885 | United States of America | Missouri | Kirksvile | — |
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| Astragalus drummondii Douglas ex Hook. | C. S. Sheldon s.n. | 06 Jul 1892 | United States of America | Colorado | Chaffee Co. Buena Vista | — |
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| Astragalus leptaleus A.Gray | C. S. Sheldon s.n. | 27 Jul 1892 | United States of America | Colorado | Chaffee Co. Buena Vista | — |
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| Astragalus miser var. oblongifolius (Rydb.) Cronquist | C. S. Sheldon 108 1707 | 25 Jul 1884 | United States of America | Colorado | North Park, near Teller | — |
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| Bahia dissecta (A.Gray) Britton | C. S. Sheldon 5835 | 06 Aug 1892 | United States of America | Colorado | El Paso Co. Creek banks,… | — |
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| Bahia oppositifolia (Nutt.) DC. | C. S. Sheldon 16 | 08 Jul 1884 | United States of America | Colorado | Larimer Co. Fort Collins. | — |
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| Baptisia sphaerocarpa Nutt. | C. S. Sheldon s.n. | 1891 | United States of America | Oklahoma | Indian Territory | — |
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| Beckmannia syzigachne (Steud.) Fernald | C. S. Sheldon 195 8895 | 09 Aug 1884 | United States of America | Colorado | Grand Co. Middle Park. Along… | — |
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| Betula occidentalis Hook. | C. S. Sheldon 101 | 13 Jul 1892 | United States of America | Colorado | Chaffee Co. N. Cottonwood Gulch | — |
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| Bidens beckii Torr. ex Spreng. | C. S. Sheldon s.n. | 11 Aug 1882 | United States of America | New York | Oswego Co. Paddy Lake | — |
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| Bidens beckii Torr. ex Spreng. | C. S. Sheldon s.n. | 11 Aug 1882 | United States of America | New York | Oswego Co. Paddy Lake | — |
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| Blepharoneuron tricholepis (Torr.) Nash | C. S. Sheldon 318 | 8/2/92 | United States of America | Colorado | Gravelly slopes, Green Mt. Falls. | — |
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| Bothriochloa laguroides var. torreyana (Steud.) M.Marchi & Longhi-Wagner | C. S. Sheldon s.n. | 1891 | United States of America | Oklahoma | Indian Territory | — |
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| Botrychium simplex E.Hitchc. | C. S. Sheldon s.n. | 25 Jun 1880 | United States of America | New York | Oswego | — |
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| Botrychium simplex E.Hitchc. | C. S. Sheldon s.n. | 18 Jun 1880 | United States of America | New York | Oswego Co. Lewis' Bluff, on… | — |
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| Bouteloua curtipendula (Michx.) Torr. | C. S. Sheldon 33 9297 | 11 Jul 1884 | United States of America | Colorado | Larimer Co. | — |
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| Bouteloua dactyloides (Nutt.) Columbus | C. S. Sheldon 164; 180 | 1891 | United States of America | Oklahoma | Indian Territory | — |
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