Displaying 151 - 175 out of 4458 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Chrysothamnus nauseosus subsp. graveolens (Nutt.) Piper | F. Tweedy 4890 | Oct. 1902 | United States of America | Colorado | Boulder Co. Plains and foothills… | — |
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| Chrysothamnus nauseosus (Pall.) Britton subsp. nauseosus | F. Tweedy 4889 | Oct.1902 | United States of America | Colorado | Boulder Co. Plains and foothills… | — |
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| Cirsium centaureae (Rydb.) K.Schum. | F. Tweedy 5852 | July 1902 | United States of America | Colorado | Boulder Co. Plains and Foothills… | — |
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| Cirsium centaureae (Rydb.) K.Schum. | F. Tweedy 4870 | August 1902 | United States of America | Colorado | Boulder Co. Mountains between Sunshine… | — |
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| Cirsium ochrocentrum A.Gray | F. Tweedy 4871 | Jul 1902 | United States of America | Colorado | Boulder Co. Near Boulder. | — |
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| Cirsium parryi (A.Gray) Petr. | F. Tweedy s.n. | Jul 1903 | United States of America | Colorado | Boulder Co. Foothills near Boulder. | — |
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| Cirsium scariosum Nutt. | F. Tweedy 4062 | 01 Sep 1901 | United States of America | Colorado | Columbus. | — |
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| Cirsium scariosum Nutt. | F. Tweedy 4060 | 10 Sep 1901 | United States of America | Colorado | Columbine. | — |
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| Cirsium scopulorum (Greene) Cockerell | F. Tweedy 5854 | Jul 1903 | United States of America | Colorado | Grand Co. Berthoud Pass. | — |
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| Cirsium scopulorum (Greene) Cockerell | F. Tweedy 5853 | Jul 1909 | United States of America | Colorado | Grand Co. Berthoud Pass. | — |
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| Crepis occidentalis Nutt. | F. Tweedy s.n. | June 02 | United States of America | Colorado | Boulder Co. Plains and foothills… | — |
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| Crepis runcinata (E.James) Torr. & A.Gray subsp. runcinata | F. Tweedy s.n. | 15 Jul 1903 - 25 Jul 1903 | United States of America | Colorado | Clear Creek Co. Empire. | — |
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| Dyssodia papposa (Vent.) Hitchc. | F. Tweedy 4887 | Oct. 1902 | United States of America | Colorado | Boulder Co. Plains and foothills… | — |
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| Dyssodia papposa (Vent.) Hitchc. | F. Tweedy 4886 | July 1902 | United States of America | Colorado | Boulder Co. Plains and foothills… | — |
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| Erigeron acris var. debilis A.Gray | F. Tweedy s.n. | 20 Jun 1903 - 10 Jul 1903 | United States of America | Colorado | Gilpin Co. Eldora to Baltimore. | — |
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| Erigeron compositus var. glabratus Macoun | F. Tweedy 4917 | August 1902 | United States of America | Colorado | Boulder Co. Mountains between Sunshine… | — |
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| Erigeron compositus var. glabratus Macoun | F. Tweedy 5812 | 20 Jun 1903 - 10 Jul 1903 | United States of America | Colorado | Gilpin Co. Eldora to Baltimore. | — |
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| Erigeron coulteri Porter | F. Tweedy 5798 | Jul 1903 | United States of America | Colorado | Grand Co. Berthoud Pass | — |
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| Erigeron divergens var. divergens | F. Tweedy 5810 | 15 Jul - 25 Jul 1903 | United States of America | Colorado | Clear Creek Co. Empire | — |
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| Erigeron divergens var. divergens | F. Tweedy 4918 | Jul 1902 | United States of America | Colorado | Boulder Co. plains and foothills… | — |
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| Erigeron elatior (A.Gray) Greene | F. Tweedy 5801 | Jul 1903 | United States of America | Colorado | Grand Co. Berthoud Pass | — |
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| Erigeron elatior (A.Gray) Greene | F. Tweedy 5802 | Jul 1903 | United States of America | Colorado | Grand Co. Berthoud Pass | — |
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| Erigeron flagellaris A.Gray | F. Tweedy 5813 | 20 Jun - 10 Jul 1903 | United States of America | Colorado | Gilpin Co. Eldora to Baltimore | — |
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| Erigeron flagellaris A.Gray | F. Tweedy 4121 | 03 Jul 1901 | United States of America | Colorado | Columbine | — |
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| Erigeron formosissimus Greene var. formosissimus | F. Tweedy 5809 | 15 Jul 1903 - 25 Jul 1903 | United States of America | Colorado | Clear Creek Co. Empire. | — |
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