Displaying 101 - 125 out of 919 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Astragalus alpinus L. var. alpinus | T. A. Williams s.n. | 26 Jul 1897 | United States of America | Wyoming | Welcome | — | 790916 |
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| Polygonum douglasii Greene | T. A. Williams s.n. | 26 Jul 1897 | United States of America | Wyoming | Welcome | — | 412491 |
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| Tricholoma portentosum var. centrale Peck | T. A. Williams | 20 Oct 1899 | United States of America | District of Columbia | — | 518101 | |||
| Juniperus communis L. | T. A. Williams s.n. | 23 Jun 1890 | United States of America | Nebraska | War Bonnet Canyon | — | 21972 |
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| Mentzelia albicaulis (Douglas ex Hook.) Torr. & A.Gray | T. A. Williams s.n. | 10 Jul 1897-12 Jul 1897 | United States of America | Wyoming | Uinta Co. | — | 22886 |
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| Eriogonum heracleoides Nutt. var. heracleoides | T. A. Williams s.n. | 11 Jul 1891 | United States of America | Wyoming | Uinta Co. | — | 283551 |
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| Eriogonum umbellatum var. dichrocephalum Gand. | T. A. Williams s.n. | 11 Jul 1891 | United States of America | Wyoming | Uinta Co. | — | 283552 |
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| Penstemon cyananthus var. subglaber (A.Gray) N.H.Holmgren | T. A. Williams s.n. | 11 Jul 1891 | United States of America | Wyoming | Uinta Co. | — | 589704 |
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| Atriplex gardneri (Moq.) D.Dietr. var. gardneri | T. A. Williams s.n. | 08 Jul 1897 | United States of America | Wyoming | Green River | — | 527829 |
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| Neokochia americana (S.Watson) G.L.Chu & S.C.Sand. | T. A. Williams s.n. | 08 Jul 1897 | United States of America | Wyoming | Green River | — | 539737 |
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| Elymus simplex Scribn. & T.A.Williams | T. A. Williams 2332 | 1897 | United States of America | Wyoming | Green River | isotype | 380735 |
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| Elymus simplex var. luxurians Scribn. & T.A.Williams | T. A. Williams 2338 | 1897 | United States of America | Wyoming | Green River | isotype | 380736 |
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| Physalis rotundata Rydb. | T. A. Williams s.n. | 19 Aug 1831 | United States of America | South Dakota | Spring Creek | type | 138852 |
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| Penstemon secundiflorus Benth. ex A.DC. | T. A. Williams s.n. | 23 Jul 1897 | United States of America | Wyoming | Little Laramie River, Sheep Mountains | — | 651685 |
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| Elaeagnus angustifolia L. | T. A. Williams s.n. | Jun 1896 | United States of America | South Dakota | Minnehaha Co. | — | 786044 |
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| Onosmodium molle var. occidentale (Mack.) I.M.Johnst. | T. A. Williams s.n. | Jul 1888 | United States of America | South Dakota | Brookings Co. Brookings | — | 21622 |
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| Juniperus scopulorum Sarg. | T. A. Williams s.n. | 13 Aug 1897 | United States of America | Wyoming | Crook Co. Devil's Tower, Little… | — | 18101 |
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| Penstemon gracilis Nutt. subsp. gracilis | T. A. Williams 177 | s.d. | United States of America | South Dakota | Corn Creek | — | 600823 |
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| Lactarius chrysorheus Fr. | T. A. Williams 2601 | 15 Oct 1899 | United States of America | District of Columbia | Washington. Takoma Park | — | 82945 | ||
| Aragallus angustatus Rydb. | T. A. Williams s.n. | 18 Jun 1890 | United States of America | Nebraska | Pine Ridge. | type | 5181 |
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| Carex platylepis Mack. | T. A. Williams 2951 | 19 Aug 1897 | United States of America | Wyoming | Ten Sleep Lakes, Big Horn… | holotype | 231125 |
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| Russula mariae Peck | T. A. Williams s.n. | 12 Nov 1899 | United States of America | District of Columbia | Takoma Park | — | 782616 | ||
| Tricholoma portentosum var. centrale Peck | T. A. Williams | 20 Nov 1899 | United States of America | District of Columbia | Takoma Park | — | 518104 | ||
| Russula ochrophylla Peck | T. A. Williams | 25 Sep 1899 | United States of America | District of Columbia | Takoma Park | — | 782671 | ||
| Minuartia rubella (Wahlenb.) Hiern | T. A. Williams s.n. | 25 Aug 1898 | United States of America | Wyoming | South fork of Piney Creek | — | 446277 |
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