Displaying 1 - 50 out of 686 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Penstemon pallidus Small | G. W. Letterman s.n. | 14 May 1898 | United States of America | Missouri | Allenton | — | 628742 |
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| Silene regia Sims | G. W. Letterman s.n. | 18 Jul 1898 | United States of America | Missouri | Saint Louis Co. | — | 24233 |
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| Silene regia Sims | G. W. Letterman | 25 Jun 1880 | United States of America | Missouri | Saint Louis Co. | — | 24236 |
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| Panax quinquefolius L. | G. W. Letterman | 25 May 1912 | United States of America | Missouri | Saint Louis Co. | — | 198590 |
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| Machaeranthera linearis Rydb. | G. W. Letterman s.n. | 06 Aug 1885 | United States of America | Wyoming | National Park [Yellowstone National Park… | holotype | 214811 |
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| Callirhoe bushii Fernald | G. W. Letterman s.n. | 16 Jul 1880 | United States of America | Oklahoma | Craig Co. | — | 37494 |
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| Machaeranthera angustifolia Rydb. | G. W. Letterman s.n. | 06 Aug 1885 | United States of America | Wyoming | National Park [Yellowstone National Park… | holotype | 214816 |
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| Convolvulus arvensis L. | G. W. Letterman s.n. | 20 May 1896 | United States of America | Missouri | Franklin Co. | — | 642986 |
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| Trifolium stoloniferum Muhl. ex A.A.Eaton | G. W. Letterman 124 | 10 May 1882 | United States of America | Missouri | Saint Louis Co. | neotype | 50580 |
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| Penstemon grandiflorus Nutt. | G. W. Letterman 371 | 22 Jul 1886 | United States of America | — | — | 601139 |
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| Eriogonum longifolium Nutt. | G. W. Letterman s.n. | 30 Jul 1879 | United States of America | Arkansas | Garland Co. | — | 32531 |
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| Penstemon virens Pennell ex Rydb. | G. W. Letterman 371 | 22 Jul 1886 | United States of America | Colorado | Grays Peak | — | 763259 |
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| Stipa lettermani Vasey | G. W. Letterman s.n. | 02 Aug 1885 | United States of America | Idaho | Snake River Stage Station | type | 431561 |
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| Solanum rostratum Dunal | G. W. Letterman s.n. | 01 Aug 1896 | United States of America | Missouri | Allenton | — | 00821020 |
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| Solanum elaeagnifolium Cav. | G. W. Letterman s.n. | 20 Oct 1894 | United States of America | Texas | Bowie Co. Texarkana. | — | 00827095 |
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| Echinochloa colona (L.) Link | G. W. Letterman s.n. | Oct 1894 | United States of America | Texas | City of Texarkana. | — | 1697507 |
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| Corispermum americanum (Nutt.) Nutt. | G. W. Letterman s.n. | 11 Aug 1885 | United States of America | Wyoming | Fossil | — | 00537318 |
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| Eragrostis capillaris (L.) Nees | G. W. Letterman s.n. | 20 Sep 1896 | United States of America | Missouri | Allenton | — | 1684109 |
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| Eragrostis cilianensis (All.) Vignolo ex Janch. | G. W. Letterman s.n. | Aug 1881 | United States of America | Texas | Dallas Co. | — | 1682092 |
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| Eragrostis cilianensis (All.) Vignolo ex Janch. | G. W. Letterman s.n. | Sep 1883 | United States of America | Missouri | Allenton | — | 1682174 |
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| Eragrostis frankii C.A.Mey. | G. W. Letterman s.n. | 30 Jun 1892 | United States of America | Missouri | Allenton | — | 1682770 |
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| Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb. | G. W. Letterman s.n. | Aug 1897 | United States of America | Missouri | Allenton | — | 1682976 |
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| Eragrostis intermedia Hitchc. | G. W. Letterman s.n. | 1882 | United States of America | Texas | Baird | — | 1683257 |
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| Eragrostis japonica (Thunb.) Trin. | G. W. Letterman 34 | 19 Oct 1894 | United States of America | Arkansas | Texarkana | — | 1683345 |
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| Eragrostis japonica (Thunb.) Trin. | G. W. Letterman s.n. | 16 Oct 1894 | United States of America | Arkansas | Texarkana. | — | 1683358 |
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| Eragrostis japonica (Thunb.) Trin. | G. W. Letterman s.n. | 19 Oct 1894 | United States of America | Arkansas | Texarkana | — | 1683365 |
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| Eragrostis pectinacea (Michx.) Nees | G. W. Letterman s.n. | Aug 1883 | United States of America | New Jersey | Atlantic Co. | — | 1699421 |
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| Eragrostis reptans (Michx.) Nees | G. W. Letterman s.n. | Aug 1881 | United States of America | Texas | Dallas Co. Trinity River | — | 1700357 |
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| Eragrostis secundiflora J.Presl | G. W. Letterman s.n. | 30 Jul 1880 | United States of America | Texas | Galveston | — | 1700432 |
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| Eragrostis secundiflora J.Presl | G. W. Letterman s.n. | 14 Aug 1886 | United States of America | Kansas | Garden City | — | 1700455 |
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| Eragrostis secundiflora J.Presl | G. W. Letterman s.n. | Aug 1881 | United States of America | Texas | Dallas. | — | 1700507 |
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| Eragrostis secundiflora J.Presl | G. W. Letterman s.n. | Aug 1881 | United States of America | Texas | Dallas. | — | 1700509 |
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| Eragrostis spectabilis (Pursh) Steud. | G. W. Letterman s.n. | Aug 1894 | United States of America | Missouri | Allenton | — | 1700797 |
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| Astragalus distortus Torr. & A.Gray var. distortus | G. W. Letterman s.n. | 20 May 1887 | United States of America | Missouri | Allerton | — | 01248547 |
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| Astragalus distortus Torr. & A.Gray var. distortus | G. W. Letterman s.n. | 20 May 1887 | United States of America | Missouri | Allerton | — | 01248548 |
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| Astragalus distortus Torr. & A.Gray var. distortus | G. W. Letterman s.n. | Jun 1883 | United States of America | Missouri | Franklin Co. Morley | — | 01248549 |
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| Dalea aurea Nutt. ex Pursh | G. W. Letterman 99 | 22 Aug 1884 | United States of America | Kansas | Wallace | — | 01073424 |
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| Astragalus flexuosus (Hook.) Douglas ex G.Don var. flexuosus | G. W. Letterman s.n. | 20 Jul 1885 | United States of America | Colorado | Boulder | — | 01249416 |
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| Dalea candida Willd. var. candida | G. W. Letterman | 1880 | United States of America | Missouri | Allenton | — | 01241227 |
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| Dalea cylindriceps Barneby | G. W. Letterman 108 | Aug 1884 | United States of America | Colorado | Near Denver | — | 01259209 |
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| Dalea cylindriceps Barneby | G. W. Letterman 108 | 20 Aug 1885 | United States of America | Colorado | Near Denver | — | 01259223 |
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| Dalea enneandra Nutt. | G. W. Letterman s.n. | Aug 1882 | United States of America | Texas | Baird | — | 01259396 |
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| Dalea lanata Spreng. var. lanata | G. W. Letterman 100 | 20 Jul 1880 | United States of America | Oklahoma | Muskogee Co. Muskogee | — | 01269965 |
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| Quercus x leana Nutt. | G. W. Letterman s.n. | — | United States of America | Missouri | Saint Louis Co. Allentown. | — | 01470438 |
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| Mimosa strigillosa Torr. & A.Gray | G. W. Letterman s.n. | Oct 1894 | United States of America | Texas | Sulphur | — | 01453419 |
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| Carya aquatica (F.Michx.) Nutt. | G. W. Letterman 5468 | May 12, 1884; Sept. | United States of America | Arkansas | Clark Co. Arkdelphia | — | 1472117 |
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| Carya aquatica (F.Michx.) Nutt. | G. W. Letterman s.n. | 12 May 1884 | United States of America | Arkansas | Clark Co. Arkdelphia. | — | 1472145 |
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| Carya cordiformis (Wangenh.) K.Koch | G. W. Letterman 1 | 05 May 1880 | United States of America | Missouri | Saint Louis Co. Allenton | — | 1472243 |
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| Carya cordiformis (Wangenh.) K.Koch | G. W. Letterman s.n. | 28 May 1893 | United States of America | Missouri | Saint Louis Co. Allenton | — | 1472433 |
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| Carya glabra (Mill.) Sweet | G. W. Letterman s.n. | 20 May 1912 | United States of America | Missouri | Saint Louis Co. Allenton | — | 1472776 |
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