Displaying 1 - 25 out of 1589 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Dermocarpa sphaerica var. galapagensis Setch. & N.L.Gardner | T. J. Howell 576 | 01 Jun 1932 | Ecuador | Galápagos | southeast side of Narborough Island | type | 03684737 |
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| Microseris howellii A.Gray | T. J. Howell s.n. | 04 Jun 1884 | United States of America | Oregon | Waldo | isotype | 215087 |
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| Microseris howellii A.Gray | T. J. Howell s.n. | 04 Jun 1884 | United States of America | Oregon | Waldo | isotype | 215088 |
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| Penstemon glandulosus Douglas ex Lindl. var. glandulosus | T. J. Howell s.n. | Jul 1880 | United States of America | Washington | Cimcoe Mountains | — | 600327 |
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| Grimmia donniana Sm. | T. J. Howell | May 1882 | United States of America | Oregon | Wasco Co. | — | 347427 | ||
| Racomitrium lanuginosum (Hedw.) Brid. | T. J. Howell | Mar 1889 | United States of America | Oregon | Clackamas Co. | — | 356702 | ||
| Mirabilis greenei S.Watson | T. J. Howell 1389 | Jul 1889 | United States of America | Oregon | Hornbrook | — | 342051 |
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| Carex marcida var. debilis L.H.Bailey | T. J. Howell 937 | 27 May 1885 | United States of America | Oregon | Harney valley | type | 11211 |
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| Orthotrichum alpestre Hornsch. ex Bruch & Schimp. | T. J. Howell 10 | May 1885 | United States of America | Oregon | Stien's Mountain | — | 421328 | ||
| Poa confinis Vasey | T. J. Howell 69(?) | 17 Jul 1882 | United States of America | Oregon | Tilamook Bay | type | 431229 |
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| Stipa occidentalis Thurb. | T. J. Howell s.n. | 28 May 1885 | United States of America | Oregon | Harney Valley | — | 431568 |
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| Draba howellii S.Watson | T. J. Howell s.n. | 16 Jun 1884 | United States of America | California | Siskiyou Mountains | probable isotype | 185292 |
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| Poa argentea Howell | T. J. Howell s.n. | 18 Jul 1887 | United States of America | Oregon | Top of Ashland Butte, Siskiyou… | isotype | 431211 |
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| Poa argentea Howell | T. J. Howell s.n. | 18 Jul 1887 | United States of America | Oregon | Top of Ashland Butte, Siskiyou… | isotype | 431208 |
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| Poa argentea Howell | T. J. Howell s.n. | 18 Jul 1887 | United States of America | Oregon | Top of Ashland Butte, Siskiyou… | isotype | 431209 |
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| Poa argentea Howell | T. J. Howell s.n. | 18 Jul 1887 | United States of America | Oregon | Top of Ashland Butte, Siskiyou… | isotype | 431210 |
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| Pleuroziopsis ruthenica (Weinm.) Kindb. ex E.Britton | T. J. Howell 1835 | 25 Aug 1895 | United States of America | Alaska | Ses Bay | — | 173092 | ||
| Penstemon glandulosus var. chelanensis (D.D.Keck) Cronquist | T. J. Howell 1517 | 01 May 1891 | United States of America | Washington | Klickitat hills | — | 600279 |
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| Penstemon glandulosus var. chelanensis (D.D.Keck) Cronquist | T. J. Howell s.n. | Jul 1880 | United States of America | Washington | Cimcoe Mountains | — | 600280 |
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| Solidago humilis var. nana A.Gray | T. J. Howell s.n. | 08 Aug 1882 | United States of America | Washington | Mount Adams | isolectotype | 259881 |
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| Calochortus longebarbatus S.Watson | T. J. Howell s.n. | Jun 1881 | United States of America | Washington | Goldendale | not a type | 319584 |
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| Festuca microstachys var. pauciflora Scribn. | T. J. Howell s.n. | May 1886 | United States of America | Oregon | Near Portland | isotype | 381055 |
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| Astragalus craigii M.E.Jones | T. J. Howell s.n. | 15 May 1885 | United States of America | Oregon | Gravel bars of the John… | isotype | 5383 |
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| Bryum atwateriae Müll.Hal. | T. J. Howell 9 | Jun 1884 | United States of America | Oregon | Waldo | — | 55762 | ||
| Sphagnum girgensohnii Russow | T. J. Howell 1802 | 14 Aug 1895 | United States of America | Alaska | — | 93381 |