Displaying 1 - 50 out of 202 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Lithospermum occidentale (Mack.) Weakley, Witsell & D.Estes | J. C. Arthur s.n. | 14 Jul 1877 | United States of America | Iowa | Story Co. Ames | — | 21561 |
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| Besseya bullii (Eaton & Wright) Rydb. | J. C. Arthur s.n. | 25 May 1874 | United States of America | Iowa | Charles City | — | 28885 |
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| Dasyscyphus arida (W.Phillips) Sacc. | J. C. Arthur s.n. | — | United States of America | Colorado | Ouray. | — | 1720803 |
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| Eragrostis cilianensis (All.) Vignolo ex Janch. | J. C. Arthur s.n. | 8/2/1875 | United States of America | Iowa | Charles City | — | 1682164 |
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| Astragalus crassicarpus Nutt. var. crassicarpus | J. C. Arthur s.n. | 09 May 1877 - 30 May 1877 | United States of America | Iowa | Ames | — | 01247986 |
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| Astragalus crassicarpus Nutt. var. crassicarpus | J. C. Arthur s.n. | May 1870 | United States of America | Iowa | Ames | — | 01247989 |
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| Dalea candida Willd. var. candida | J. C. Arthur s.n. | 14 Jul 1877 | United States of America | Iowa | Ames | — | 01073601 |
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| Astragalus lotiflorus Hook. | J. C. Arthur s.n. | s.d. | United States of America | Iowa | Dubuque Co. Charles City | — | 01261157 |
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| Carya cordiformis (Wangenh.) K.Koch | J. C. Arthur s.n. | 04 Jun 1874 | United States of America | Iowa | Floyd Co. Charles City. | — | 1472293 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | J. C. Arthur s.n. | 12 Aug 1875 | United States of America | Iowa | Charles City | — | 1645839 |
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| Poa nemoralis L. | J. C. Arthur s.n. | 12 Jul 1875 | United States of America | Iowa | Floyd Co. Charles City. | — | 1792087 |
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| Trichaptum biforme (Fr.) Ryvarden | J. C. Arthur s.n. | 19 Jun 1889 | United States of America | Indiana | Tippecanoe Co. Lafayette | — | 1937655 |
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| Artemisia dracunculus L. | J. C. Arthur s.n. | Aug 1870 | United States of America | Iowa | Ames | — | 1893826 |
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| Fomitopsis rosea (Alb.:Schwein.) P.Karst. | J. C. Arthur s.n. | 25 Jul 1886 | United States of America | Minnesota | Vermilion Lake | — | 1963419 |
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| Gloeophyllum trabeum (Pers.:Fr.) Murrill | J. C. Arthur s.n. | 21 May 1891 | United States of America | Maryland | Lafayette | — | 1964611 |
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| Irpex | J. C. Arthur | Dec 1896 | United States of America | Washington | Spirit Lake. | — | 1999694 |
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| Cirsium scariosum Nutt. | J. C. Arthur 5004 | 01 Aug 1912 | United States of America | Colorado | Ridgeway. | — | 2053197 |
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| Cytidia salicina (Fr.) Burt | J. C. Arthur s.n. | 20 Aug 1912 | United States of America | Colorado | Gilpin Co. Tolland | — | 01992061 |
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| Cytidia salicina (Fr.) Burt | J. C. Arthur s.n. | 20 Aug 1912 | United States of America | Colorado | Gilpin Co. Tolland | — | 1992062 |
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| Pycnoporus cinnabarinus (Jacq.:Fr.) P.Karst. | J. C. Arthur s.n. | 17 May 1893 | United States of America | Indiana | Tippecanoe Co. Lafayette | — | 1949514 |
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| Carex arcta Boott | J. C. Arthur B100 | 17 Jul 1886 | United States of America | Minnesota | Vermilion Lake. | — | 2236566 |
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| Carex bicknellii Britton | J. C. Arthur s.n. | 11 Jun 1874 | United States of America | Iowa | Floyd Co. Charles City, Iowa.… | — | 2251130 |
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| Carex buxbaumii Wahlenb. | J. C. Arthur s.n. | 11 Jun 1874 | United States of America | Iowa | Charles City. | — | 2253213 |
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| Carex davisii Schwein. & Torr. | J. C. Arthur s.n. | 02 Jun 1877 | United States of America | Iowa | Ames. | — | 2261925 |
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| Carex hystricina Muhl. ex Willd. | J. C. Arthur s.n. | — | — | — | — | 2191949 |
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| Carex paupercula Michx. | J. C. Arthur 60 | 21 Sep 1909 | United States of America | Maine | Knox Co. Isle au Hart. | — | 2295215 |
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| Carex paupercula Michx. | J. C. Arthur B298 | 23 Jul 1886 | United States of America | Minnesota | St. Louis R. | — | 2295293 |
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| Carex umbellata Schkuhr ex Willd. | J. C. Arthur s.n. | 25 Jun 1887 | United States of America | Iowa | Spirit Lake. | — | 2295854 |
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| Carex tribuloides var. cristata Wahlenb. | J. C. Arthur 20 | 18 Jul 1877 | United States of America | Iowa | Story Co. | — | 2307646 |
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| Trametes versicolor (L.:Fr.) Lloyd | J. C. Arthur s.n. | Nov 1889 | United States of America | Indiana | Tippecanoe Co. Lafayette. | — | 1984683 |
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| Trametes versicolor (L.:Fr.) Lloyd | J. C. Arthur 5 | 11 May 1906 | United States of America | Indiana | Tippecanoe Co. Lafayette. | — | 1984686 |
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| Solidago missouriensis Nutt. | J. C. Arthur s.n. | 21 Aug 1877 | United States of America | Iowa | Story Co. | — | 2353854 |
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| Solidago rigida var. rigida | J. C. Arthur s.n. | 18 Sep 1877 | United States of America | Iowa | Story Co. Ames. | — | 2370739 |
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| Juncus nodosus L. | J. C. Arthur s.n. | 16 Jul 1872 | United States of America | Iowa | Floyd Co. Charles City. | — | 2397194 |
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| Juncus torreyi Coville | J. C. Arthur s.n. | 03 Aug 1874 | United States of America | Iowa | Floyd Co. Charles City. | — | 2402739 |
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| Salix exigua subsp. interior (Rowlee) Cronquist | J. C. Arthur s.n. | 27 May 1875 | United States of America | Iowa | Floyd Co. Charles City. | — | 2415233 |
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| Lonicera dioica L. | J. C. Arthur s.n. | 5/27/75 | United States of America | Iowa | Floyd Co. | — | 2437676 |
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| Cyathus olla (Batsch) Pers. | J. C. Arthur s.n. | Sep 1889 | United States of America | Indiana | Perrysville | — | 1967596 |
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| Secotium warnei Peck | J. C. Arthur s.n. | 08 Sep 1893 | United States of America | Indiana | Lafayette | — | 01952280 |
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| Synchytrium asari Arthur & Holw. | J. C. Arthur A86 | 24 Jul 1886 | United States of America | Minnesota | Vermilion Lake | — | 1926169 |
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| Bremia lactucae Regel | J. C. Arthur 1885-10-02 | — | United States of America | New York | Ontario Co. Geneva. | — | 1959226 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — | 01960370 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — | 1960371 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — | 1960372 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — | 1960373 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur 118 | 14 Jul 1883 | United States of America | Illinois | Chicago | — | 1960422 |
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| Peronospora ficariae (Nees) C.Tul. | J. C. Arthur s.n. | 22 May 1884 | United States of America | New York | Ontario Co. Geneva. | — | 1960507 |
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| Lyophyllum decastes (Fr.) Singer | J. C. Arthur s.n. | 22 Oct 1906 | United States of America | Indiana | Lafayette | — | 2755359 |
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| Plasmopara halstedii (Farl.) Berl. | J. C. Arthur s.n. | 17 Jul 1904 | United States of America | Indiana | Tippecanoe Co. Lafayette | — | 2758951 |
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| Plasmopara geranii (Peck) Berl. & De Toni | J. C. Arthur s.n. | May 1891 | United States of America | Indiana | Marshall Co. Lake Maxinkuckee | — | 2759100 |
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