Displaying 1 - 50 out of 1335 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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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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| 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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| 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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| 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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| Pinus contorta var. murrayana (Grev. & Balf.) Engelm. | T. J. Howell s.n. | Aug 1880 | United States of America | Oregon | Cascade Mountains | — | 49890 |
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| Erigeron confinis Howell | T. J. Howell 1507 | Jul 1887 | United States of America | Oregon | Siskiyou Mountains near Waldo | isotype | 168437 |
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| Plagiobothrys hirtus (Greene) I.M.Johnst. var. hirtus | T. J. Howell s.n. | 25 Jun 1887 | United States of America | Oregon | Umpqua Valley | — | 38106 |
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| Orthocarpus cuspidatus Greene | T. J. Howell s.n. | 18 Jul 1887 | United States of America | Oregon | Ashland Butte, Siskiyou Mountains | isotype | 90840 |
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| Penstemon rupicola (Piper) Howell | T. J. Howell s.n. | Jun 1880 | United States of America | Oregon | Cascade Mountains | — | 650746 |
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| Arabis oregana Rollins | T. J. Howell s.n. | 26 Apr 1887 | United States of America | Oregon | Ashland | isotype | 172626 |
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| Arabis oregana Rollins | T. J. Howell s.n. | 26 Apr 1887 | United States of America | Oregon | Ashland | isotype | 172628 |
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| Racomitrium oreganum Renauld & Cardot | T. J. Howell | Mar 1885 | United States of America | Oregon | Oregon City | isotype | 267810 |
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| Racomitrium oreganum Renauld & Cardot | T. J. Howell 7 | Mar 1885 | United States of America | Oregon | Oregon City | isotype | 267811 |
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| Racomitrium oreganum Renauld & Cardot | T. J. Howell 7 | Mar 1885 | United States of America | Oregon | Oregon City | isotype | 267812 |
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| Lupinus canescens Howell | T. J. Howell s.n. | 14 Jun 1885 | United States of America | Oregon | Buck Creek. | type | 15815 |
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| Potentilla ashlandica Greene | T. J. Howell 686 | 08 Jul 1897 | United States of America | Arizona | Siskiyou Mountains, near Ashland Butte. | possible type | 436190 |
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| Nothochelone nemorosa (Douglas ex Lindl.) Straw | T. J. Howell s.n. | Jul 1880 | United States of America | — | Cascade Mountains | — | 790499 |
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| Nothochelone nemorosa (Douglas ex Lindl.) Straw | T. J. Howell s.n. | Jul 1880 | United States of America | — | Cascade Mountains | — | 790500 |
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| Limnorchis laxiflora Rydb. | T. J. Howell s.n. | 08 Jun 1884 | United States of America | Oregon | Coast Mountains | holotype | 9002 |
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| Ranunculus sceleratus var. multifidus Nutt. | T. J. Howell s.n. | May 1885 | United States of America | Oregon | Harney valley | — | 494903 |
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| Penstemon azureus Benth. var. azureus | T. J. Howell s.n. | 30 May 1884 | United States of America | Oregon | Josephine Co. Kerbyville | — | 571149 |
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| Penstemon parvulus (A.Gray) Krautter | T. J. Howell s.n. | 05 Jul 1887 | United States of America | Oregon | Josephine Co. Deer Creek Mountains | — | 571150 |
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| Penstemon azureus Benth. var. azureus | T. J. Howell s.n. | 30 May 1884 | United States of America | Oregon | Kerbyville | — | 571205 |
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| Saxifraga oregana Howell | T. J. Howell 1498 | 28 Jun 1893 | United States of America | Oregon | Lake Labish, near Salem | isotype | 186200 |
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| Saxifraga oregana Howell | T. J. Howell 1498 | 28 Jun 1893 | United States of America | Oregon | Lake Labish, near Salem | isotype | 186201 |
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| Thelypodium eucosmum B.L.Rob. | T. J. Howell s.n. | 21 May 1885 | United States of America | Oregon | Grant Co. | — | 24530 |
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| Thelypodium eucosmum B.L.Rob. | T. J. Howell 3921 | 21 May 1885 | United States of America | Oregon | Grant Co. | — | 24534 |
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| Thelypodium eucosmum B.L.Rob. | T. J. Howell s.n. | 21 May 1885 | United States of America | Oregon | Grant Co. | — | 24535 |
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| Epilobium oreganum Greene | T. J. Howell s.n. | 13 Jul 1887 | United States of America | Oregon | In Spring runs. Grant Pass | isotype | 74120 |
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| Arabis suksdorfii Howell | T. J. Howell s.n. | 10 Aug 1882 | United States of America | Washington | Mount Adams | isotype | 172666 |
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| Arabis suksdorfii Howell | T. J. Howell s.n. | 10 Aug 1882 | United States of America | Washington | Mount Adams | isotype | 172667 |
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| Arabis suksdorfii Howell | T. J. Howell s.n. | 10 Aug 1882 | United States of America | Washington | Mount Adams | isotype | 172668 |
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| Mimulus bigelovii var. ovatus A.Gray | T. J. Howell s.n. | 12 May 1885 | United States of America | Oregon | Muddy Station, John Day Valley | isosyntype | 90692 |
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| Mimulus bigelovii var. ovatus A.Gray | T. J. Howell s.n. | 12 May 1885 | United States of America | Oregon | Muddy Station, John Day Valley | isosyntype | 90694 |
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| Eriogonum thymoides Benth. | T. J. Howell s.n. | July 1880 | United States of America | — | Eastern Washington Territory | — | 283444 |
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| Astragalus sylvaticus S.Watson | T. J. Howell s.n. | 30 Jun 1887 | United States of America | Oregon | Glendale | isotype | 658918 |
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