Displaying 1 - 50 out of 2574 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Glycyrrhiza lepidota Pursh | J. T. Howell s.n. | 1877 | United States of America | — | Columbia River | — |
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| Lupinus arbustus var. arbustus | J. T. Howell s.n. | June 1879 | United States of America | Washington | Klickitat Co. Klickitat, Washington Territory. | — |
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| Sedum spathulifolium Hook. | J. T. Howell s.n. | Jun 1880 | United States of America | Oregon | Western Oregon | — |
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| Lupinus arbustus var. arbustus | J. T. Howell s.n. | June 1880 | United States of America | — | Dry prairies. | — |
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| Lupinus arbustus var. arbustus | J. T. Howell s.n. | June 1880 | United States of America | — | Dry prairies. | — |
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| Triteleia bridgesii (S.Watson) Greene | J. T. Howell s.n. | 08 Jun 1884 | United States of America | Oregon | Coast Mountains | — |
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| Plagiobothrys fulvus (Hook. & Arn.) I.M.Johnst. | J. T. Howell s.n. | 24 Jun 1884 | United States of America | Oregon | Grant's Pass. | — |
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| Allium tolmiei var. tolmiei | J. T. Howell s.n. | May 1885 | United States of America | Oregon | Trout Creek, Blue Mountains. | — |
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| Sedum stenopetalum Pursh | J. T. Howell s.n. | 15 Jun 1886 | United States of America | Oregon | Sauvie's Island | — |
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| Maianthemum dilatatum (Alph.Wood) A.Nelson & J.F.Macbr. | J. T. Howell s.n. | May 1887 | United States of America | Oregon | St. Henlen | — |
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| Plagiobothrys fulvus (Hook. & Arn.) I.M.Johnst. | J. T. Howell s.n. | 05 May 1887 | United States of America | Oregon | Umpqua Valley. | — |
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| Plagiobothrys fulvus (Hook. & Arn.) I.M.Johnst. | J. T. Howell s.n. | 05 May 1887 | United States of America | Oregon | Umpqua Valley. | — |
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| Pellaea brachyptera (T.Moore) Baker | J. T. Howell s.n. | 05 Jul 1887 | United States of America | Oregon | Top of Deer Creek Mts. | — |
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| Hastingsia serpentinicola Becking | J. T. Howell s.n. | 05 Jul 1887 | United States of America | Oregon | Top of Deer Creek Mountains | — |
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| Cyperus aristatus Rottb. | J. T. Howell s.n. | 14 Jul 1887 | United States of America | Oregon | Grant's Pass. | — |
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| Plagiobothrys shastensis Greene ex A.Gray | J. T. Howell 1382 | May 1889 | United States of America | Oregon | Grants Pass. | — |
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| Lupinus arbustus var. arbustus | J. T. Howell 1341 | 10 May 1889 | United States of America | Oregon | Woodville. | — |
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| Plagiobothrys shastensis Greene ex A.Gray | J. T. Howell s.n. | May 1891 | United States of America | Oregon | Grant's Pass. | — |
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| Vaccinium ovalifolium Sm. | J. T. Howell s.n. | May 1891 | United States of America | California | Cascade Mountains | — |
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| Isoetes howellii Engelm. | J. T. Howell 1521 | 03 Jul 1891 | United States of America | Oregon | Hood River | — |
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| Lupinus densiflorus var. densiflorus | J. T. Howell 1004 | 09 May 1925 | United States of America | California | Merced Co. Plains SW of… | — |
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| Symphyotrichum chilense (Nees) G.L.Nesom | J. T. Howell 1578 | 28 Nov 1925 | United States of America | California | Solano Co. Cordelia | — |
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| Arctostaphylos tomentosa (Pursh) Lindl. | J. T. Howell 1652 | 28 Feb 1926 | United States of America | California | Marin Co. Rock Spring Trail,… | — |
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| Salix exigua subsp. melanopsis (Nutt.) Cronquist | J. T. Howell 2031 | 13 Jun 1926 | United States of America | California | Stanislaus Co. Knight's Ferry. | — |
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| Astraeus hygrometricus (Pers.) Morgan | J. T. Howell s.n. | 17 Jun 1926 | United States of America | California | Lake Tahoe | — |
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| Isoetes nuttallii A.Braun | J. T. Howell 2296 | 04 Apr 1927 | United States of America | California | Shasta Co. Turf of stream-bank,… | — |
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| Downingia mirabilis J.T.Howell | J. T. Howell 4200 | 25 Apr 1927 | United States of America | California | Merced Co. 5 miles NE… | isotype |
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| Acamptopappus sphaerocephalus var. hirtellus S.F.Blake | J. T. Howell 2492 | 11 Jun 1927 | United States of America | California | San Bernardino Co. Between Cajon… | — |
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| Calochortus weedii var. intermedius Ownbey | J. T. Howell 2572 | 22 Jun 1927 | United States of America | California | Orange Co. On N side… | isotype |
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| Chilopsis linearis (Cav.) Sweet | J. T. Howell 2687 | 09 Jul 1927 | United States of America | California | Mojave Desert, just above Box… | — |
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| Selaginella bigelovii Underw. | J. T. Howell 2834 | 22 Jul 1927 | United States of America | California | Orange Co. Hot exposed openings… | — |
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| Selaginella bigelovii Underw. | J. T. Howell 2834 | 22 Jul 1927 | United States of America | California | Orange Co. Claymine Canyon, Santa… | — |
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| Selaginella bigelovii Underw. | J. T. Howell 2834 | 22 Jul 1927 | United States of America | California | Orange Co. Claymine Canyon, Santa… | — |
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| Selaginella bigelovii Underw. | J. T. Howell 2886A | 01 Aug 1927 | United States of America | California | Riverside Co. Morongo Canyon, n.… | — |
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| Selaginella cinerascens A.A.Eaton | J. T. Howell 2948 | 06 Aug 1927 | United States of America | California | San Diego Co. Sand slopes… | — |
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| Keckiella ternata (Torr. ex A.Gray) Straw subsp. ternata | J. T. Howell s.n. | 07 Aug 1927 | United States of America | California | San Diego Co. In canyon… | — |
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| Lessingia germanorum var. tenuipes J.T.Howell | J. T. Howell 3005 | 17 Aug 1927 | United States of America | California | San Luis Obispo Co. 4… | isotype |
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| Arctostaphylos glauca Lindl. | J. T. Howell 3343 | 11 Feb 1928 | United States of America | California | Los Angeles Co. Trail between… | — |
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| Aristida | J. T. Howell 3443 | 11 Mar 1928 | United States of America | California | Six miles south-east of Garnet… | — |
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| Baileya pauciradiata Harv. & A.Gray | J. T. Howell 3435 | 11 Mar 1928 | United States of America | California | Riverside Co. 6 mi SE… | — |
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| Chaenactis carphoclinia var. peirsonii (Jeps.) Munz | J. T. Howell 3491 | 24 Mar 1928 | United States of America | California | San Diego Co. Near Palm… | — |
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| Phacelia rotundifolia Torr. ex S.Watson | J. T. Howell 3636 | 02 Apr 1928 | United States of America | California | Inyo Co. 2 miles east… | — |
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| Phacelia fremontii Torr. | J. T. Howell 3645 | 02 Apr 1928 | United States of America | California | Inyo Co. 2 miles east… | — |
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| Astragalus trichopodus var. lonchus (M.E.Jones) Barneby | J. T. Howell 3745 | 21 Apr 1928 | United States of America | California | Ventura Co. Pt. Mogu | — |
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| Ephedra viridis Coville | J. T. Howell 3824 | 25 May 1928 | United States of America | California | Kern Co. Frazier Mountain Park,… | — |
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| Antennaria dimorpha (Nutt.) Torr. & A.Gray | J. T. Howell 3852 | May 16, 1928 | United States of America | California | Ventura Co. Mt. Pinos, near… | — |
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| Chorizanthe staticoides var. brevispina Goodman | J. T. Howell 3876 | 10 Jun 1928 | United States of America | California | Monrovia Canyon, San Gabriel Mountains | isotype |
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| Penstemon eatonii A.Gray var. eatonii | J. T. Howell 3910 | 14 Jun 1928 | United States of America | California | Inyo Co. Surprise Canyon, Panamint… | — |
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| Keckiella rothrockii (A.Gray) Straw var. rothrockii | J. T. Howell 3905 | 14 Jun 1928 | United States of America | California | Surprise Canyon, Panamint Mountains | — |
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| Phacelia ramosissima var. latifolia (Torr.) Cronquist | J. T. Howell 3894 | 14 Jun 1928 | United States of America | California | Inyo Co. Surprise Canyon, Panamint… | — |
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