Displaying 1 - 25 out of 697 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Cirsium centaureae (Rydb.) K.Schum. | G. W. Letterman 78 | Jul 1865 | United States of America | Colorado | Penn's Gulch | — |
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| Crataegus | G. W. Letterman s.n. | 1873 | United States of America | Arkansas | Hempstead Co. | — |
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| Poa nervosa (Hook.) Vasey | G. W. Letterman 67 | 04 Sep 1875 | United States of America | Wyoming | — |
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| Agrostis perennans (Walter) Tuck. | G. W. Letterman s.n. | Aug 1876 | United States of America | Missouri | Allenton | — |
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| Spartina patens (Aiton) Muhl. | G. W. Letterman s.n. | Aug 1876 | United States of America | New Jersey | Atlantic Co. | — |
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| Solidago stricta Aiton | G. W. Letterman s.n. | 1876 | United States of America | New Jersey | Atlantic Co. Egg Harbor. | — |
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| Solidago | G. W. Letterman s.n. | 1876 | United States of America | New Jersey | Atlantic Co. | — |
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| Betula populifolia Marshall | G. W. Letterman s.n. | 1876 | United States of America | New Jersey | Atlantic Co. Egg Harbor | — |
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| Baccharis halimifolia L. | G. W. Letterman s.n. | 1876 | United States of America | New Jersey | Atlantic Co. | — |
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| Fimbristylis autumnalis (L.) Roem. & Schult. | G. W. Letterman s.n. | 1876 | United States of America | Pennsylvania | Philadelphia Co. | — |
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| Puccinia atropuncta Peck & Clinton | G. W. Letterman s.n. | 1878 | United States of America | Missouri | Jefferson Co. | — |
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| Asplenium resiliens Kunze | G. W. Letterman s.n. | Jul 1879 | United States of America | Arkansas | Garland Co. | — |
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| Cerastium fontanum Baumg. | G. W. Letterman s.n. | Jul 1879 - Aug 1880 | United States of America | Arkansas | Garland Co. | — |
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| Helenium amarum (Raf.) H.Rock | G. W. Letterman s.n. | Jul 1879 | United States of America | Arkansas | Garland Co. | — |
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| Helenium amarum (Raf.) H.Rock | G. W. Letterman s.n. | Jul 1879 | United States of America | Arkansas | Garland Co. | — |
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| Eriogonum longifolium Nutt. | G. W. Letterman s.n. | 30 Jul 1879 | United States of America | Arkansas | Garland Co. | — |
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| Unspecified | G. W. Letterman 5473 | 30 Jul 1879 | United States of America | Arkansas | Garland Co. | — |
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| Paspalum dilatatum Poir. | G. W. Letterman s.n. | Aug 1879 | United States of America | Arkansas | Little Rock | — |
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| Onoclea sensibilis L. | G. W. Letterman s.n. | Aug 1879 | United States of America | Montana | Allenton | — |
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| Platanthera ciliaris (L.) Lindl. | G. W. Letterman s.n. | Aug 1879 | United States of America | Arkansas | Hot Spring Co. | — |
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| Callicarpa americana L. | G. W. Letterman s.n. | Aug 1879 | United States of America | Arkansas | Garland Co. | — |
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| Chrysopsis graminifolia var. microcephala (Small) Cronquist | G. W. Letterman s.n. | Aug 1879 | United States of America | Arkansas | Garland Co. | — |
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| Cyperus plukenetii Fernald | G. W. Letterman 18 | Aug 1879 | United States of America | Arkansas | Pulaski Co. | — |
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| Ruellia pedunculata Torr. ex A.Gray | G. W. Letterman s.n. | Aug 1879 | United States of America | Arkansas | Garland Co. | — |
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| Zanthoxylum clava-herculis L. | G. W. Letterman s.n. | Aug 1879 | United States of America | Arkansas | Pulaski Co. | — |
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