Displaying 1 - 25 out of 341 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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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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| Penstemon crandallii A.Nelson var. crandallii | C. S. Sheldon 547 | 09 Jul 1892 | United States of America | Colorado | Chaffee Co. South Cottonwood Gulch | — | 589306 |
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| Penstemon laricifolius var. exilifolius (A.Nelson) Payson | C. S. Sheldon 55 | 20 Jul 1884 | United States of America | Wyoming | Laramie Plains | — | 604901 |
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| Senecio ambrosioides Rydb. | C. S. Sheldon 5830 | 02 Aug 1892 | United States of America | Colorado | Green Mt. Falls | holotype | 232449 |
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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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| Macronema obtusum Rydb. | C. S. Sheldon 5838 | 14 Jul 1892 | United States of America | Colorado | Chaffee Co. South Cottonwood Gulch | type | 214958 |
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| Penstemon magnus Pennell | C. S. Sheldon 90 6128v.l | 30 Jul 1884 | United States of America | Colorado | North Park, near Teller. | holotype | 91177 |
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| Penstemon barbatus var. torreyi (Benth.) A.Gray | C. S. Sheldon s.n. | 27 Jul 1892 | United States of America | Colorado | Chaffee Co. Near Buena Vista | — | 572060 |
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| Muhlenbergia filiculmis Vasey | C. S. Sheldon 5805 | 02 Aug 1892 | United States of America | Colorado | El Paso Co. Green Mt.… | isotype | 381387 |
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| Penstemon procerus Graham var. procerus | C. S. Sheldon 89 6128 | 22 Jul 1884 | United States of America | Colorado | North Park. Near Pinkhampton's. | — | 640032 |
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| Tomanthera auriculata (Michx.) Raf. | C. S. Sheldon 1926 6293 | 13 Sep 1884 | United States of America | Missouri | Adair Co. | — | 29015 |
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| Penstemon virgatus var. asa-grayi (Crosswh.) Dorn | C. S. Sheldon 6180 8 | 07 Jul 1884 | United States of America | Colorado | Fort Collins | — | 763328 |
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| Penstemon virgatus var. asa-grayi (Crosswh.) Dorn | C. S. Sheldon 8 6180 | 07 Jul 1884 | United States of America | Colorado | Fort Collins | — | 763327 |
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| Penstemon virgatus var. asa-grayi (Crosswh.) Dorn | C. S. Sheldon s.n. | 08 Jul 1892 | United States of America | Colorado | Chaffee Co. Buena Vista | — | 763329 |
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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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| Penstemon griffinii A.Nelson | C. S. Sheldon 554 | 23 Jul 1892 | United States of America | Colorado | Chaffee Co. Base of Mt.… | — | 601145 |
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| Penstemon whippleanus A.Gray | C. S. Sheldon 82 | 09 Jul 1892 | United States of America | Colorado | Chaffee Co. South Cottonwood Gulch | — | 771713 |
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| Penstemon whippleanus A.Gray | C. S. Sheldon 243 6143 | 16 Aug 1884 | United States of America | Colorado | Berthord Pass, near Georgetown | — | 771712 |
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| Penstemon whippleanus A.Gray | C. S. Sheldon 6143a 115 | 26 Jul 1884 | United States of America | Colorado | North Park, near Feller | — | 771711 |
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| Poa sheldoni Vasey | C. S. Sheldon s.n. | 04 Jul 1892 | United States of America | Colorado | Chaffee Co. Along Cottonwood Creek | isotype | 431345 |
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| Ranunculus calthifolius Greene | C. S. Sheldon 281 | 17 Aug 1884 | United States of America | Colorado | Berthoud Pass, near Georgetown. | isolectotype | 841925 |
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| Astragalus adsurgens var. robustior Hook. | C. S. Sheldon s.n. | 20 Jul 1884 | United States of America | Wyoming | Laramie Plains | — | 01203701 |
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| Astragalus agrestis Douglas ex G.Don | C. S. Sheldon 54 | 19 Jul 1884 | United States of America | Wyoming | Laramie Plains | — | 01214937 |
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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 | — | 01214996 |
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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 | — | 01215480 |
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