Displaying 651 - 675 out of 688 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Verbesina encelioides (Cav.) Benth. & Hook.f. | G. W. Letterman s.n. | 30 Jul 1882 | United States of America | Texas | Travis Co. | — | 3044853 |
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| Machaeranthera bigelovii (A.Gray) Greene | G. W. Letterman s.n. | 08 Aug 1886 | United States of America | Colorado | Park Co. | — | 3046050 |
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| Machaeranthera pinnatifida (Shinners) Hook. var. pinnatifida | G. W. Letterman s.n. | 22 Aug 1885 | United States of America | Kansas | Wallace Co. | — | 3070053 |
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| Brunnichia cirrhosa Gaertn. | G. W. Letterman s.n. | Oct 1894 | United States of America | Texas | Bowie Co. | — | 3063758 |
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| Puccinia atropuncta Peck & Clinton | G. W. Letterman s.n. | 1878 | United States of America | Missouri | Jefferson Co. | — | 3002192 |
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| Senecio fremontii var. blitoides (Greene) Cronquist | G. W. Letterman 5492 | 15 Aug 1885 | United States of America | Colorado | Gray's Peak | — | 3081988 |
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| Salvia lyrata L. | G. W. Letterman s.n. | 20 Oct 1894 | United States of America | Texas | Bowie Co. | — | 3094702 |
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| Senecio pudicus Greene | G. W. Letterman 5494 | Aug 1884 | United States of America | Colorado | Ute Pass | — | 3085089 |
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| Sclerocarpus uniserialis (Hook.) Benth. & Hook.f. ex Hemsl. | G. W. Letterman s.n. | 30 Jul 1882 | United States of America | Texas | Travis Co. | — | 3110057 |
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| Packera dimorphophylla var. dimophophylla (Greene) W.A.Weber & Á.Löve | G. W. Letterman 5491 | Aug 1886 | United States of America | Colorado | Long's Peak | — | 3088595 |
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| Packera fendleri (A.Gray) W.A.Weber & Á.Löve | G. W. Letterman 260 | 13 Aug 1884 | United States of America | Colorado | Pikes Peak | — | 3116527 |
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| Packera pseudaurea var. flavula (Greene) Trock & T.M.Barkley | G. W. Letterman 5495 | Aug 1886 | United States of America | Colorado | Long's Peak | — | 3118587 |
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| Psilostrophe villosa Rydb. ex Britton | G. W. Letterman s.n. | 12 Aug 1882 | United States of America | Texas | Howard Co. | — | 3112625 |
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| Palafoxia callosa (Nutt.) Torr. & A.Gray | G. W. Letterman s.n. | 22 Jul 1880 - 25 Jul 1880 | United States of America | Texas | Grayson Co. | — | 3126006 |
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| Palafoxia callosa (Nutt.) Torr. & A.Gray | G. W. Letterman s.n. | 26 Jul 1882 - 30 Jul 1882 | United States of America | Texas | Travis Co. | — | 3126019 |
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| Pyrrocoma lanceolata (Hook.) Greene var. lanceolata | G. W. Letterman s.n. | 09 Aug 1885 | United States of America | Wyoming | Fossil | — | 3120721 |
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| Palafoxia rosea (Bush) Cory var. rosea | G. W. Letterman s.n. | 22 Jul 1880 | United States of America | Texas | Grayson Co. | — | 3126196 |
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| Palafoxia sphacelata (Nutt. ex Torr.) Cory | G. W. Letterman s.n. | 22 Jul 1880 | United States of America | Texas | Grayson Co. | — | 3126245 |
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| Parthenium hispidum Raf. | G. W. Letterman 251 | 22 Jul 1880 | United States of America | Texas | Grayson Co. | — | 3126441 |
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| Ratibida columnifera (Nutt.) Wooton & Standl. | G. W. Letterman s.n. | Jul 1880 | United States of America | Oklahoma | Muskogee Co. Indian Territory | — | 3121635 |
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| Ratibida columnifera (Nutt.) Wooton & Standl. | G. W. Letterman s.n. | Aug 1882 | United States of America | Texas | Travis Co. | — | 3121659 |
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| Ratibida tagetes (E.James) Barnhart | G. W. Letterman 50 | 22 Aug 1884 | United States of America | Kansas | Wallace Co. | — | 3122115 |
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| Rudbeckia hirta var. pulcherrima Farw. | G. W. Letterman s.n. | 30 Jul 1882 | United States of America | Texas | Travis Co. | — | 3123295 |
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| Bumelia cassinifolia W.Small | G. W. Letterman 287 | 1883, probably May | United States of America | Louisiana | Saint Landry Parish. | holotype | 273368 |
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| Acer | G. W. Letterman s.n. | Aug 1883 | — | — | — | 02490510 |
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