Displaying 876 - 919 out of 919 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Cladonia parasitica (Hoffm.) Hoffm. | T. A. Williams s.n. | 01 May 1897 | United States of America | District of Columbia | Rock Creek Park. | — | 1534414 |
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| Xanthoparmelia chlorochroa (Tuck.) Hale | T. A. Williams s.n. | 20 Jun 1890 | United States of America | Nebraska | Near War Bonnet Canon, northwest… | — | 1610546 |
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| Buellia chloroleuca Körb. | T. A. Williams s.n. | 19 Aug 1897 | United States of America | Wyoming | Ten Sleep Lakes, Big Horn… | — | 1612358 |
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| Fuscopannaria leucosticta (Tuck.) P.M.Jørg. | T. A. Williams s.n. | Dec 1897 | United States of America | Maryland | Montgomery Co. Sligo Creek. | — | 1516777 |
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| Cetraria aculeata (Schreb.) Fr. | T. A. Williams s.n. | 02 Aug 1897 | United States of America | Wyoming | Bull Camp, headwaters of Crazy… | — | 1562330 |
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| Rinodina mniaraea (Ach.) Körb. | T. A. Williams s.n. | 18 Aug 1897 | United States of America | Wyoming | Ten Sleep Lakes, Big Horn… | — | 1702822 |
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| Placynthiella uliginosa (Schrad.) Coppins & P.James | T. A. Williams s.n. | May 1897 | United States of America | District of Columbia | Takoma Park. | — | 1706102 |
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| Punctelia bolliana (Müll.Arg.) Krog | T. A. Williams s.n. | Apr 1895 | United States of America | South Dakota | Brookings Co. Brookings. | — | 1572893 |
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| Aster williamsii Rydb. | T. A. Williams s.n. | 12 Aug 1898 | United States of America | Wyoming | Dry Hills, North Fork Clear… | holotype | 162115 |
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| Lophiotrema dakotensis Ellis & Everh. | T. A. Williams 152 | 24 Oct 1894 | United States of America | South Dakota | Brookings Co. Brookings. | — | 04535000 | ||
| Carex lanuginosa Michx. | T. A. Williams s.n. | — | — | — | — | 2193715 |
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| Acer glabrum Torr. | T. A. Williams s.n. | 23 Jun 1890 | — | — | — | 2483948 |
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| Ostrya virginiana (Mill.) K.Koch | T. A. Williams s.n. | 09 Aug 1894 | United States of America | South Dakota | — | 2483256 |
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| Tortula obtusifolia (Schwägr.) Mathieu | T. A. Williams 12 | Aug 1891 | United States of America | South Dakota | Pennington Co. | — | 341629 | ||
| Graphis scripta var. serpentaria | T. A. Williams s.n. | Sep 1894 | United States of America | South Dakota | Brookings Co. Lak Oakwood. | — | 04440004 |
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| Sphaerotheca castagnei Lév. | T. A. Williams s.n. | 10/11 - '90 | United States of America | Nebraska | Saunders Co. | — | 2943925 |
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| Sphaerotheca castagnei Lév. | T. A. Williams s.n. | 10/11 90 | United States of America | Nebraska | Saunders Co. | — | 2943946 |
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| Sphaerotheca castagnei Lév. | T. A. Williams s.n. | 20 Aug 1890 | United States of America | Nebraska | Cass Co. | — | 2943947 |
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| Poa nervosa (Hook.) Vasey | T. A. Williams 2299 | 1897 | United States of America | Wyoming | — | 1792400 |
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| Carex heliophila Mack. | T. A. Williams s.n. | 01 Jun 1896 | United States of America | North Dakota | — | 2190017 |
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| Populus angustifolia E.James | T. A. Williams s.n. | Jun 1890 | United States of America | Nebraska | — | 2466579 |
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| Cornus drummondii C.A.Mey. | T. A. Williams 1891 | 1891 | United States of America | Nebraska | — | 2504143 |
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| Solidago nemoralis subsp. decemflora | T. A. Williams 9 | — | United States of America | South Dakota | — | 2356359 |
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| Poa pratensis L. | T. A. Williams 2281 | 1897 | United States of America | Wyoming | — | 1794017 |
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| Poa secunda J.Presl | T. A. Williams 2526 | 1897 | United States of America | Wyoming | — | 1809397 |
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| Poa secunda J.Presl | T. A. Williams 2249a | 1897 | United States of America | Wyoming | — | 1809798 |
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| Duchesnea indica (Andrews) Focke | T. A. Williams s.n. | 15 Jun 1898 | United States of America | Virginia | — | 2798298 |
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| Lycopus asper Greene | T. A. Williams 129 | Aug 1894 | United States of America | South Dakota | — | 3040710 |
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| Phlox amplifolia Britton | T. A. Williams s.n. | 23 Jun 1890 | United States of America | Nebraska | — | 3342887 |
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| Berula angustifolia Mert. & W.D.J.Koch | T. A. Williams 102 | Aug 1894 | United States of America | South Dakota | — | 03366555 |
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| Epilobium ciliatum Raf. var. ciliatum | T. A. Williams 104 | Aug 1894 | United States of America | South Dakota | — | 3295530 |
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| Cicuta maculata var. angustifolia Hook. | T. A. Williams 123 | Aug 1894 | United States of America | South Dakota | — | 3455324 |
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| Lobelia siphilitica L. | T. A. Williams 371 | Aug 1894 | United States of America | South Dakota | — | 3749156 |
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| Lobelia siphilitica L. | T. A. Williams 371 | Aug 1894 | United States of America | South Dakota | — | 3749155 |
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| Cypripedium candidum Muhl. ex Willd. | T. A. Williams 373 | Aug 1894 | United States of America | South Dakota | — | 4043816 |
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| Doellingeria umbellata (Mill.) Nees | T. A. Williams 131 | — | United States of America | South Dakota | — | 1870064 |
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| Elymus lanceolatus subsp. lanceolatus | T. A. Williams 2894 | 1897 | United States of America | Wyoming | — | 1674422 |
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| Potentilla arguta var. arguta | T. A. Williams 318 | Aug 1894 | United States of America | South Dakota | — | 2829371 |
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| Heliomeris laevis | T. A. Williams s.n. | 31 Jul 1889 | United States of America | Nebraska | — | 2905155 |
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| Cyathus striatus Pers. | T. A. Williams s.n. | Aug. '91 | United States of America | Wisconsin | — | 01952001 |
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| Cyathus olla (Batsch) Pers. | T. A. Williams s.n. | 24 Jul 1989 | United States of America | Nebraska | — | 1967604 |
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| Podosphaera oxyacanthae (DC.) de Bary | T. A. Williams s.n. | 28 Jul 1890 | United States of America | Nebraska | Ashland, Neer [?] | — | 2943497 |
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| Erysiphe cichoracearum | T. A. Williams s.n. | 11 Jul 1890 | United States of America | Nebraska | Sioux Co. War Bonnet Canyon | — | 2937342 |
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| Distichlis stricta (Torr.) Rydb. | T. A. Williams 2319 | 23 Jul 1897 | United States of America | Wyoming | Little Laramie River | — | 3500701 |
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