Displaying 1 - 25 out of 67 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Agrostis mertensii Trin. | E. F. Williams s.n. | 14 Jul 1895 | United States of America | New Hampshire | Mike's house. Mt. Washington. | — | 1556475 |
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| Arnica lonchophylla Greene | E. F. Williams s.n. | 25 Jul 1905 | Canada | Quebec | Gaspé. Cold walls of Percé… | — | 1882272 |
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| Astragalus eucosmus B.L.Rob. | E. F. Williams s.n. | 19 Jul 1902 | United States of America | Maine | Aroostook Co. Valley of Aroostook… | — | 01249084 |
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| Betula alba L. | E. F. Williams | 03 Aug 1902 | Canada | Quebec | Témiscouata Reg. Co. Mun. crest… | — | 2475318 |
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| Betula papyrifera Marshall | E. F. Williams s.n. | — | Canada | Quebec | Rimouski-Neigette Reg. Co. Mun. Rimouski. | — | 2477023 |
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| Carex | E. F. Williams 169 | 18 Jul 1902 | United States of America | Maine | Aroostook Co. Terrace of Aroostook… | — | 2333464 |
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| Carex deweyana var. collectanea Fernald | E. F. Williams s.n. | 12 Jul 1905-15 Jul 1905 | Canada | Quebec | Bonaventure Reg. Co. Mun. Grand… | isotype | 345517 |
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| Carex scirpoidea Michx. | E. F. Williams s.n. | 10 Jul 1895 | United States of America | New Hampshire | Mt. Washington | — | 2302328 |
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| Carex sterilis Willd. | E. F. Williams 115 | 15 Jul 1902 | United States of America | Maine | Aroostook Co. | — | 2304870 |
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| Carex sterilis Willd. | E. F. Williams 492 | 15 Jul 1902 | United States of America | Maine | Aroostook Co. | — | 2304871 |
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| Carex tenuiflora Wahlenb. x C. trisperma Dewey | E. F. Williams 110 | 19 Jul 1902 | United States of America | Maine | Aroostook Co. In swamp, Fort… | — | 02307001 |
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| Carex tenuiflora Wahlenb. x C. trisperma Dewey | E. F. Williams 110 | 19 Jul 1902 | United States of America | Maine | Aroostook Co. In swamp, Fort… | — | 2307002 |
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| Cynoglossopsis boreale Fernald | E. F. Williams s.n. | 17 Jul 1905 | Canada | Quebec | Bonaventure Reg. Co. Mun. Little… | syntype | 335200 |
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| Cynoglossum boreale Fernald | E. F. Williams s.n. | 17 Jul 1905 | Canada | Quebec | Bonaventure Reg. Co. Mun. Little… | isolectotype | 04206131 | ||
| Cystopteris fragilis (L.) Bernh. | E. F. Williams s.n. | 24 Jul 1905 | Canada | Quebec | Gaspé, Percé, Mt. Ste. Anne | — | 3799421 |
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| Diphasiastrum sabinifolium (Willd.) Holub | E. F. Williams 12 | 11 Aug 1901 | United States of America | Maine | Aroostook Co. | — | 3505141 |
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| Diphasiastrum sabinifolium (Willd.) Holub | E. F. Williams 12 | 11 Aug 1901 | United States of America | Maine | Fort Kent. | — | 3505143 |
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| Diphasiastrum sitchense (Rupr.) Holub | E. F. Williams 11 | 11 Aug 1901 | United States of America | Maine | Aroostook Co. | — | 3505197 |
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| Diphasiastrum sitchense (Rupr.) Holub | E. F. Williams 11 | 11 Aug 1901 | United States of America | Maine | Aroostook Co. | — | 3505200 |
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| Eleocharis ovata (Roth) Roem. & Schult. | E. F. Williams 55a | 12 Aug 1901 | United States of America | Maine | Aroostook Co. Muddy roadside, Fort… | — | 02610115 |
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| Eleocharis ovata (Roth) Roem. & Schult. | E. F. Williams s.n. | 12 Aug 1901 | United States of America | Maine | Fort Kent. | — | 2825543 |
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| Eleocharis ovata (Roth) Roem. & Schult. | E. F. Williams s.n. | 26 Aug 1893 | United States of America | Maine | Fort Kent. | — | 2825581 |
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| Euphrasia oakesii Wettst. | E. F. Williams 61 | 4 Aug 1901 | United States of America | New Hampshire | Coös Co. Head of Oakes… | — | 3283010 |
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| Euphrasia oakesii Wettst. | E. F. Williams 61 | 4 Aug 1901 | United States of America | New Hampshire | Coös Co. Head of Oakes… | — | 3283011 |
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| Euphrasia oakesii Wettst. | E. F. Williams 61 | 4 Aug 1901 | United States of America | New Hampshire | Coös Co. Head of Oakes… | — | 3283012 |
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