Displaying 26 - 50 out of 4457 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Penstemon virgatus var. asa-grayi (Crosswh.) Dorn | F. Tweedy 5714 | 15 Jul 1903-25 Jul 1903 | United States of America | Colorado | Clear Creek Co. Empire | — | 763326 |
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| Penstemon virgatus var. asa-grayi (Crosswh.) Dorn | F. Tweedy 5198 | Jul 1902 | United States of America | Colorado | Boulder Co. Near Boulder | — | 763324 |
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| Penstemon rydbergii A.Nelson var. rydbergii | F. Tweedy 5721 | 20 Jun 1903-10 Jul 1903 | United States of America | Colorado | Gilpin Co. Eldora to Baltimore | — | 651445 |
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| Penstemon rydbergii A.Nelson var. rydbergii | F. Tweedy 4302 | 03 Jul 1901 | United States of America | Colorado | Columbine, northern Colorado | — | 651444 |
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| Penstemon whippleanus A.Gray | F. Tweedy 5719 | Jul 1903 | United States of America | Colorado | Grand Co. Berthoud Pass | — | 771721 |
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| Penstemon whippleanus A.Gray | F. Tweedy 4300 | 04 Jul 1901 | United States of America | Colorado | Hahns Peak | — | 771720 |
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| Penstemon whippleanus A.Gray | F. Tweedy 5720 | 20 Jun 1903-10 Jul 1903 | United States of America | Colorado | Gilpin Co. Eldora to Baltimore | — | 771722 |
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| Chrysopsis amplifolia Rydb. | F. Tweedy 4898 | Jul 1902 | United States of America | Colorado | Plains and foothills near Boulder:… | holotype | 163180 |
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| Penstemon glaber Pursh var. glaber | F. Tweedy 5710 | 20 Jun 1903-10 Jul 1903 | United States of America | Colorado | Gilpin Co. Eldora to Baltimore | — | 600265 |
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| Trifolium stenolobum Rydb. | F. Tweedy 457 | 15 Jul 1896 | United States of America | Colorado | La Plata Mts | isotype | 50579 |
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| Acrolasia latifolia Rydb. | F. Tweedy 5149 | Aug 1902 | United States of America | Colorado | Mountains between Sunshine and Ward. | holotype | 112175 |
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| Erodium cicutarium (L.) L'Hér. ex Aiton | F. Tweedy 5538 | Jun 1903 | United States of America | Colorado | Boulder Co. Near Boulder | — | 643597 |
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| Penstemon virens Pennell ex Rydb. | F. Tweedy 5197 | Aug 1902 | United States of America | Colorado | Boulder Co. Mountains between Sunshine… | — | 763217 |
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| Penstemon virens Pennell ex Rydb. | F. Tweedy 5718 | 20 Jun 1903-10 Jul 1903 | United States of America | Colorado | Gilpin Co. Eldora to Baltimore | — | 763196 |
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| Penstemon virens Pennell ex Rydb. | F. Tweedy 5715 | Jun 1903 | United States of America | Colorado | Boulder Co. Near Boulder | — | 763218 |
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| Penstemon virens Pennell ex Rydb. | F. Tweedy 5716 | 15 Jul 1903-25 Jul 1903 | United States of America | Colorado | Clear Creek Co. Empire | — | 763219 |
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| Penstemon virens Pennell ex Rydb. | F. Tweedy 5717 | 15 Jul 1903-25 Jul 1903 | United States of America | Colorado | Clear Creek Co. Empire | — | 763220 |
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| Lupinus argenteus Pursh var. argenteus | F. Tweedy 453 | 18 Jul 1896 | United States of America | Colorado | La Plata Co. | — | 736625 |
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| Solanum triflorum Nutt. | F. Tweedy 5235 | Jul 1902 | United States of America | Colorado | Boulder Co. Near Boulder | — | 820343 |
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| Solanum rostratum Dunal | F. Tweedy 5233 | Jul 1902 | United States of America | Colorado | Boulder Co. Near Boulder | — | 820932 |
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| Valeriana capitata subsp. pubicarpa (Rydb.) F.G.Mey. | F. Tweedy 4555 | 03 Jul 1901 | United States of America | Colorado | Hohus Peak | — | 888547 |
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| Elymus arizonicus (Scribn. & J.G.Sm.) Gould | F. Tweedy 4822 | Aug 1902 | United States of America | Colorado | Boulder Co. Mountains between Sunshine… | — | 1597590 |
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| Elymus canadensis L. | F. Tweedy 4817 | Jul 1902 | United States of America | Colorado | Boulder Co. Plains and Foothills… | — | 1654817 |
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| Elymus elymoides subsp. brevifolius (J.G.Sm.) Barkworth | F. Tweedy 4816 | Jul 1902 | United States of America | Colorado | Boulder Co. Mountains between Sunshine… | — | 1673553 |
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| Eragrostis cilianensis (All.) Vignolo ex Janch. | F. Tweedy 4808 | Jul 1902 | United States of America | Colorado | Boulder Co. Plains and Foothills… | — | 1682147 |
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