Displaying 1 - 50 out of 341 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Abronia fragrans Nutt. ex Hook. | C. S. Sheldon 24 6823 | 09 Jul 1884 | United States of America | Colorado | Larimer Co. | — | 3370466 |
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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 | — | 2716042 |
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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 | — | 2483912 |
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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. | — | 2484262 |
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| Acer pensylvanicum L. | C. S. Sheldon 495 | 10 Jun 1881 | United States of America | New York | Oswego Co. | — | 2487304 |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | C. S. Sheldon 5804 | 06 Jul 1892 | United States of America | Colorado | Chaffee Co. | — | 1553275 |
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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 | — | 2727093 |
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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 | — | 2727126 |
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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… | — | 1867681 |
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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 | — | 1876365 |
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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 | — | 3262270 |
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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 | — | 3761823 |
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| Allium geyeri S.Watson | C. S. Sheldon 62 | 20 Jul 1884 | United States of America | Wyoming | Laramie Plains, Wyo. Terr. | — | 3763174 |
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| Alyssum alyssoides (L.) L. | C. S. Sheldon | 02 Jun 1880 | United States of America | New York | Tompkins Co. | — | 785830 |
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| Amorpha canescens Pursh | C. S. Sheldon s.n. | 28 Jun 1887 | United States of America | Missouri | Adair Co. | — | 2559030 |
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| Andropogon gerardii Vitman | C. S. Sheldon 337 | 1891 | United States of America | Oklahoma | Indian Territory | — | 1639281 |
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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 | — | 3592517 |
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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… | — | 3592611 |
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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… | — | 3592651 |
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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 | — | 2739668 |
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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 | — | 2739883 |
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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 | — | 2739886 |
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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 | — | 2739898 |
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| Anemone parviflora Michx. | C. S. Sheldon 5851 | 09 Jul 1892 | United States of America | Colorado | South Cottonwood Gulch | — | 2740176 |
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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 | — | 2740449 |
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| Antennaria microphylla Rydb. | C. S. Sheldon s.n. | 27 Jul 1892 | United States of America | Colorado | Chaffee Co. | — | 1891427 |
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| Antennaria microphylla Rydb. | C. S. Sheldon 61 3999 | 20 Jul 1884 | United States of America | Wyoming | Laramie Plains | — | 1891456 |
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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 | 23083 |
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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 | 23058 |
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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… | — | 2741813 |
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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 | — | 2741949 |
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| Arceuthobium douglasii Engelm. | C. S. Sheldon 5873 | 04 Aug 1892 | United States of America | Colorado | El Paso Co. | — | 3705870 |
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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' | — | 3234033 |
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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 | — | 3234076 |
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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 | — | 3675103 |
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| Aristida dichotoma Michx. | C. S. Sheldon 333 | 1891 | United States of America | Oklahoma | Indian Territory | — | 1474015 |
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| Aristida oligantha Michx. | C. S. Sheldon 266 | 1891 | United States of America | Oklahoma | Indian Territory | — | 1557833 |
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| Aristida purpurea Nutt. | C. S. Sheldon 5790 | 20 Jul 1891 | United States of America | Oklahoma | Cotton Co. near Cash Creek.… | — | 1558336 |
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| Aristida purpurea var. fendleriana (Steud.) Vasey | C. S. Sheldon 136 | 1891 | United States of America | Oklahoma | Indian Territory | — | 1632111 |
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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… | — | 1632112 |
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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 | — | 1632193 |
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| Aristida purpurea var. longiseta (Steud.) Vasey | C. S. Sheldon s.n. | 1891 | United States of America | Oklahoma | Indian Territory | — | 1632379 |
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| Aristida purpurea var. longiseta (Steud.) Vasey | C. S. Sheldon s.n. | 1891 | United States of America | Oklahoma | Indian Territory | — | 1632380 |
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| Artemisia biennis Willd. | C. S. Sheldon 204 | 12 Aug 1884 | United States of America | Colorado | Middle Park. | — | 1892485 |
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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. | — | 1893116 |
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| Artemisia dracunculus L. | C. S. Sheldon 196 | 09 Aug 1884 | United States of America | Colorado | Middle Park. | — | 1894002 |
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| Artemisia dracunculus L. | C. S. Sheldon s.n. | 28 Jul 1892 | United States of America | Colorado | Chaffee Co. | — | 1894009 |
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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… | — | 1894859 |
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| Asclepias asperula (Decne.) Woodson | C. S. Sheldon 5825 | 26 Jul 1892 | United States of America | Colorado | Chaffee Co. Hortense Springs | — | 3515624 |
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| Asclepias hallii A.Gray | C. S. Sheldon 5826 | 05 Jul 1892 | United States of America | Colorado | Chaffee Co. | — | 3516574 |
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