Displaying 626 - 697 out of 697 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Holodiscus discolor (Pursh) Maxim. var. discolor | G. W. Letterman s.n. | 29 Jul 1884 | United States of America | Wyoming | near Sherman | — |
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| Cyperus rotundus L. | G. W. Letterman 6 | 15 Aug 1880 | United States of America | Texas | Harris Co. | — |
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| Cyperus rotundus L. | G. W. Letterman s.n. | 16 Aug 1880 | United States of America | Texas | Harris Co. | — |
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| Cyperus setigerus Torr. & Hook. | G. W. Letterman 7 | 20 Jul 1882 | United States of America | Texas | Callahan Co. | — |
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| Cyperus virens Michx. | G. W. Letterman s.n. | Aug 1880 | United States of America | Texas | Orange Co. | — |
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| Cyperus virens Michx. | G. W. Letterman 28to Britton | 11 Aug 1880 | United States of America | Texas | Orange Co. | — |
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| Physocarpus monogynus (Torr.) J.M.Coult. | G. W. Letterman 133 | 29 Jul 1884 | United States of America | Wyoming | Sherman | — |
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| Eleocharis obtusa (Willd.) Schult. | G. W. Letterman s.n. | 18 Oct 1894 | United States of America | Texas | Bowie Co. | — |
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| Potentilla effusa Douglas ex Lehm. | G. W. Letterman 138 | 30 Jul 1884 | United States of America | Wyoming | Albany Co. | — |
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| Potentilla fissa Nutt. ex Torr. & A.Gray | G. W. Letterman 136 | 05 Aug 1885 | United States of America | Wyoming | National Park | — |
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| Potentilla pulcherrima Lehm. | G. W. Letterman 137 | 05 Aug 1885 | United States of America | Wyoming | National Park | — |
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| Eriophyllum lanatum var. integrifolium (Hook.) Smiley | G. W. Letterman 42 | 03 Aug 1885 | United States of America | Idaho | Snake River Stage Station. | — |
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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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| Prunus | G. W. Letterman s.n. | s.d. | United States of America | Colorado | Penn's Gulch | — |
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| Fimbristylis spadicea (L.) Vahl | G. W. Letterman s.n. | 01 Aug 1880 | United States of America | Texas | Galveston Co. | — |
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| Fimbristylis spadicea (L.) Vahl | G. W. Letterman 8 | 01 Aug 1880 | United States of America | Texas | Galveston Co. | — |
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| Eupatorium semiserratum DC. | G. W. Letterman s.n. | 19 Oct 1894 | United States of America | Texas | Bowie Co. | — |
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| Euthamia leptocephala (Torr. & A.Gray) Greene | G. W. Letterman s.n. | 19 Oct 1894 | United States of America | Texas | Bowie Co. | — |
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| Gaillardia aestivalis var. fastigiata (Greene) Waterf. | G. W. Letterman s.n. | 15 Jul 1880 | United States of America | Oklahoma | Craig Co. | — |
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| Grindelia microcephala DC. | G. W. Letterman 5489 | 20 Aug 1882 | United States of America | Texas | Dallas Co. | — |
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| Helenium autumnale L. | G. W. Letterman 30 | 02 Aug 1885 | United States of America | Idaho | Near Beaver Cañon [Canyon]. | — |
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| Vernonia lindheimeri A.Gray & Engelm. | G. W. Letterman 5500 | 26 Jul 1882 | United States of America | Texas | Travis Co. Near Austin | — |
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| Vernonia lindheimeri A.Gray & Engelm. | G. W. Letterman s.n. | 10 Aug 1982 | United States of America | Texas | Travis Co. Near Austin | — |
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| Tetradymia canescens DC. | G. W. Letterman s.n. | 02 Aug 1885 | United States of America | Idaho | Beaver Cañon [Canyon]. | — |
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| Hymenoxys grandiflora (Torr. & A.Gray) K.L.Parker | G. W. Letterman s.n. | 15 Aug 1885 | United States of America | Colorado | Gray's Peak | — |
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| Hymenoxys linearifolia Hook. | G. W. Letterman s.n. | 25 Jul 1880 | United States of America | Texas | Grayson Co. | — |
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| Hymenoxys scaposa (DC.) K.F.Parker | G. W. Letterman s.n. | 15 Aug 1885 | United States of America | Colorado | Gray's Peak | — |
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| Hymenoxys scaposa var. linearis (Nutt.) K.F.Parker | G. W. Letterman s.n. | Aug 1882 | United States of America | Texas | Callahan Co. | — |
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| Hedeoma drummondii Benth. | G. W. Letterman s.n. | July 22 | United States of America | Texas | Grayson Co. | — |
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| Hedeoma hispida Pursh | G. W. Letterman s.n. | Jun 1880 | United States of America | Missouri | near Allenton | — |
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| Fimbristylis vahlii (Lam.) Link | G. W. Letterman s.n. | 19 Oct 1894 | United States of America | Arkansas | Miller Co. | — |
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| Liatris punctata Hook. var. punctata | G. W. Letterman s.n. | 22 Aug 1884 | United States of America | Kansas | Wallace Co. | — |
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| Hyptis radiata Willd. | G. W. Letterman s.n. | 05 Aug 1880 | United States of America | Texas | Orange Co. | — |
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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. | — |
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| Machaeranthera bigelovii (A.Gray) Greene | G. W. Letterman s.n. | 08 Aug 1886 | United States of America | Colorado | Park Co. | — |
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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. | — |
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| Brunnichia cirrhosa Gaertn. | G. W. Letterman s.n. | Oct 1894 | United States of America | Texas | Bowie 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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| Senecio fremontii var. blitoides (Greene) Cronquist | G. W. Letterman 5492 | 15 Aug 1885 | United States of America | Colorado | Gray's Peak | — |
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| Salvia lyrata L. | G. W. Letterman s.n. | 20 Oct 1894 | United States of America | Texas | Bowie Co. | — |
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| Senecio pudicus Greene | G. W. Letterman 5494 | Aug 1884 | United States of America | Colorado | Ute Pass | — |
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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. | — |
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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 | — |
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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 | — |
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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 | — |
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| Psilostrophe villosa Rydb. ex Britton | G. W. Letterman s.n. | 12 Aug 1882 | United States of America | Texas | Howard Co. | — |
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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. | — |
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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. | — |
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| Pyrrocoma lanceolata (Hook.) Greene var. lanceolata | G. W. Letterman s.n. | 09 Aug 1885 | United States of America | Wyoming | Fossil | — |
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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. | — |
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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. | — |
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| Parthenium hispidum Raf. | G. W. Letterman 251 | 22 Jul 1880 | United States of America | Texas | Grayson Co. | — |
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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 | — |
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| Ratibida columnifera (Nutt.) Wooton & Standl. | G. W. Letterman s.n. | Aug 1882 | United States of America | Texas | Travis Co. | — |
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| Ratibida tagetes (E.James) Barnhart | G. W. Letterman 50 | 22 Aug 1884 | United States of America | Kansas | Wallace Co. | — |
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| Rudbeckia hirta var. pulcherrima Farw. | G. W. Letterman s.n. | 30 Jul 1882 | United States of America | Texas | Travis Co. | — |
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| Bumelia cassinifolia W.Small | G. W. Letterman 287 | 1883, probably May | United States of America | Louisiana | Saint Landry Parish. | holotype |
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| Acer | G. W. Letterman s.n. | Aug 1883 | — | — | — |
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| Astragalus flexuosus (Hook.) Douglas ex G.Don var. flexuosus | G. W. Letterman s.n. | 1881 | United States of America | Colorado | — |
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| Poa arctica R.Br. | G. W. Letterman s.n. | 1886 | United States of America | Colorado | — |
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| Poa fendleriana (Steud.) Vasey | G. W. Letterman s.n. | 1886 | United States of America | Colorado | — |
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| Poa glauca subsp. rupicola (Nash) W.A.Weber | G. W. Letterman 1731 | 1886 | United States of America | Colorado | — |
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| Poa nervosa (Hook.) Vasey | G. W. Letterman 67 | 04 Sep 1875 | United States of America | Wyoming | — |
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| Leucopoa kingii (S.Watson) W.A.Weber | G. W. Letterman s.n. | — | United States of America | Colorado | — |
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| Elymus scribneri (Vasey) M.E.Jones | G. W. Letterman s.n. | — | United States of America | Colorado | — |
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| Piptatherum micranthum (Trin. & Rupr.) Barkworth | G. W. Letterman s.n. | — | United States of America | Colorado | — |
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| Kochia Roth | G. W. Letterman s.n. | s.d. | United States of America | Colorado | — |
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| Leptochloa panicea subsp. brachiata (Steud.) N.Snow | G. W. Letterman s.n. | 1884 | United States of America | Colorado | — |
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| Leptochloa panicea subsp. brachiata (Steud.) N.Snow | G. W. Letterman s.n. | 1884 | United States of America | Colorado | — |
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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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| Phacelia purshii var. pushii F.Levy | G. W. Letterman s.n. | 10 May 1884 | United States of America | Arkansas | Pulaski Co. | — |
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| Physaria vitulifera Rydb. | G. W. Letterman s.n. | 07 Aug 1884 | United States of America | Colorado | Teller Co. Near 7 Lakes | — |
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