Displaying 101 - 150 out of 1600 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Astragalus misellus S.Watson | T. J. Howell s.n. | 14 May 1885 | United States of America | Oregon | Mitchell. | isotype |
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| Galium bifolium S.Watson | T. J. Howell s.n. | 09 Jul 1887 | United States of America | Oregon | Top of Siskiyou Mountains, near… | possible type |
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| Peucedanum martindalei J.M.Coult. & Rose | T. J. Howell s.n. | May 1880-Jun 1800 | United States of America | — | Cascade Mountains | isotype |
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| Viola deltoidea Greene | T. J. Howell s.n. | 20 Apr 1887 | United States of America | Oregon | Near Waldo. | type |
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| Viola deltoidea Greene | T. J. Howell s.n. | 20 Apr 1887 | United States of America | Oregon | Near Waldo. | type |
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| Viola deltoidea Greene | T. J. Howell s.n. | 20 Apr 1887 | United States of America | Oregon | Near Waldo. | type |
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| Delphinium depauperatum Nutt. | T. J. Howell s.n. | 02 Jun 1885 | United States of America | Oregon | Base of Stein's Mountain | — |
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| Scapania granulifera A.Evans | T. J. Howell | Apr 1892 | United States of America | California | Del Norte Co. Near Crescent… | cotype |
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| Arabis puberula Nutt. ex Torr. & A.Gray | T. J. Howell | Jun 1885 | United States of America | Oregon | Harney Valley | — |
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| Hieracium longiberbe Howell | T. J. Howell s.n. | Jun 1886 | United States of America | Oregon | Cascades of the Columbia | possible type |
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| Phacelia peckii J.T.Howell | T. J. Howell s.n. | 07 Jun 1884 | United States of America | Oregon | Waldo | — |
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| Arabis koehleri Howell | T. J. Howell s.n. | 17 Apr 1887 | United States of America | Oregon | Roseburg, Umpqua Valley | isotype |
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| Arabis koehleri Howell | T. J. Howell s.n. | 17 Apr 1887 | United States of America | Oregon | Roseburg, Umpqua Valley | isotype |
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| Arabis koehleri Howell | T. J. Howell s.n. | 17 Apr 1887 | United States of America | Oregon | Roseburg, Umpqua Valley | isotype |
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| Arabis koehleri Howell | T. J. Howell s.n. | 17 Apr 1887 | United States of America | Oregon | Roseburg, Umpqua Valley | isotype |
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| Ptilium crista-castrensis (Hedw.) De Not. | T. J. Howell | 18 Aug 1895 | United States of America | Alaska | Near Yes Bay | — | ||||
| Horkelia sericata S.Watson | T. J. Howell s.n. | 13 Jun 1884 | United States of America | Oregon | Coast Mountains, fortieth parallel. | possible isotype |
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| Horkelia sericata S.Watson | T. J. Howell s.n. | 13 Jun 1884 | United States of America | Oregon | Coast Mountains, fortieth parallel. | possible isotype |
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| Evax caulescens (Benth.) A.Gray | T. J. Howell s.n. | 24 May 1884 | United States of America | Oregon | Grant's Pass | — |
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| Evax caulescens (Benth.) A.Gray | T. J. Howell s.n. | 02 May 1887 | United States of America | Oregon | Roseburg, Umpqua Valley | — |
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| Astragalus drepanolobus A.Gray | T. J. Howell s.n. | 10 May 1882 | United States of America | Oregon | On gravel bars, John Day… | probable isotype |
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| Astragalus drepanolobus A.Gray | T. J. Howell s.n. | 10 May 1882 | United States of America | Oregon | On gravel bars, John Day… | probable isotype |
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| Hieracium barbigerum Greene | T. J. Howell s.n. | 19 Jul 1887 | United States of America | Oregon | Ashland Butte, Siskiyou Mountains | syntype |
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| Hieracium barbigerum Greene | T. J. Howell s.n. | 19 Jul 1887 | United States of America | Oregon | Ashland Butte, Siskiyou Mountains | syntype |
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| Chamaecyparis nootkatensis (D.Don) Spach | T. J. Howell s.n. | — | United States of America | Oregon | Cascade Mountains | — |
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| Chamaecyparis nootkatensis (D.Don) Spach | T. J. Howell s.n. | Oct 1882 | United States of America | Oregon | Base of Mount Hood | — |
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| Chamaecyparis nootkatensis (D.Don) Spach | T. J. Howell s.n. | Oct 1882 | United States of America | Oregon | Base of Mount Hood | — |
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| Astragalus agrestis Douglas ex G.Don | T. J. Howell s.n. | 09 Jun 1885 | United States of America | Oregon | Harney Valley | — |
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| Poa macrantha Vasey | T. J. Howell | — | United States of America | Oregon | Clatsop Spit | syntype |
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| Peucedanum watsonii J.M.Coult. & Rose | T. J. Howell 830 | 20 May 1882 | United States of America | Oregon | Near Alkali | syntype |
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| Erigeron poliospermus A.Gray | T. J. Howell s.n. | 01 May 1882 | United States of America | Washington | Near Umatilla | syntype |
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| Erigeron poliospermus A.Gray | T. J. Howell s.n. | 20 Apr 1882 | United States of America | Washington | Banks of the Columbia River… | syntype |
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| Erigeron poliospermus A.Gray | T. J. Howell s.n. | 20 Apr 1882 | United States of America | Washington | Banks of the Columbia River… | syntype |
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| Claopodium crispifolium (Hook.) Renauld & Cardot | T. J. Howell | Feb 1882 | United States of America | Oregon | Pacific Coast. Sauvie's Island | — | ||||
| Claopodium crispifolium (Hook.) Renauld & Cardot | T. J. Howell | Mar 1886 | United States of America | Oregon | Pacific Coast. Sauvie's Island | — | ||||
| Hypnum circinale Hook. | T. J. Howell | Mar 1886 | United States of America | Oregon | Pacific Coast. Sauvie's Island | — | ||||
| Hypnum circinale Hook. | T. J. Howell 1 | Mar 1885 | United States of America | Oregon | Clackamas Co. Pacific Coast | — | ||||
| Hypnum circinale Hook. | T. J. Howell | Feb 1882 | United States of America | Oregon | Pacific Coast. Sauvie's Island | — | ||||
| Lilium bolanderi S.Watson | T. J. Howell s.n. | 13 Jun 1884 | United States of America | Oregon | Coast Mountains, fortieth parallel. | possible syntype |
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| Lilium bolanderi S.Watson | T. J. Howell s.n. | 13 Jun 1884 | United States of America | Oregon | Coast Mountains, fortieth parallel. | possible syntype |
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| Erigeron decumbens Nutt. | T. J. Howell s.n. | 07 Jul 1882 | United States of America | Oregon | North Yamhill | — |
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| Erigeron decumbens Nutt. | T. J. Howell s.n. | 07 Jul 1882 | United States of America | Oregon | North Yamhill | — |
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| Erigeron decumbens Nutt. | T. J. Howell s.n. | 25 Jun 1885 | United States of America | Oregon | Stantiam | — |
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| Bromus ciliatus var. pauciflorus Vasey | T. J. Howell s.n. | 29 Jul 1886 | United States of America | Oregon | North side of Mount Hood | isotype |
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| Bromus ciliatus var. pauciflorus Vasey | T. J. Howell s.n. | 29 Jul 1886 | United States of America | Oregon | North side of Mount Hood | isotype |
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| Cirsium howellii Petr. | T. J. Howell s.n. | 25 Jul 1887 | United States of America | Oregon | Rogue River valley | type |
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| Calochortus greenei S.Watson | T. J. Howell s.n. | Jul 1880 | United States of America | Washington | Klickitat Prairie. W. T. | possible type |
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| Galium oreganum Britton | T. J. Howell s.n. | Jun 1880 | United States of America | Oregon | Western Oregon | possible type |
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| Galium oreganum Britton | T. J. Howell s.n. | Jun 1880 | United States of America | Oregon | Western Oregon. | possible type |
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| Crataegus columbiana Howell | T. J. Howell 1927 | 18 May 1896 | United States of America | Oregon | Near Rendelton. | possible isotype |
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