Displaying 1 - 75 out of 202 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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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 | — |
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| Besseya bullii (Eaton & Wright) Rydb. | J. C. Arthur s.n. | 25 May 1874 | United States of America | Iowa | Charles City | — |
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| Dasyscyphus arida (W.Phillips) Sacc. | J. C. Arthur s.n. | — | United States of America | Colorado | Ouray. | — |
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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 | — |
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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 | — |
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| Astragalus crassicarpus Nutt. var. crassicarpus | J. C. Arthur s.n. | May 1870 | United States of America | Iowa | Ames | — |
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| Dalea candida Willd. var. candida | J. C. Arthur s.n. | 14 Jul 1877 | United States of America | Iowa | Ames | — |
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| Astragalus lotiflorus Hook. | J. C. Arthur s.n. | s.d. | United States of America | Iowa | Dubuque Co. Charles City | — |
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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. | — |
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| Calamagrostis canadensis (Michx.) P.Beauv. | J. C. Arthur s.n. | 12 Aug 1875 | United States of America | Iowa | Charles City | — |
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| Poa nemoralis L. | J. C. Arthur s.n. | 12 Jul 1875 | United States of America | Iowa | Floyd Co. Charles City. | — |
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| Trichaptum biforme (Fr.) Ryvarden | J. C. Arthur s.n. | 19 Jun 1889 | United States of America | Indiana | Tippecanoe Co. Lafayette | — |
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| Artemisia dracunculus L. | J. C. Arthur s.n. | Aug 1870 | United States of America | Iowa | Ames | — |
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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 | — |
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| Gloeophyllum trabeum (Pers.:Fr.) Murrill | J. C. Arthur s.n. | 21 May 1891 | United States of America | Maryland | Lafayette | — |
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| Irpex | J. C. Arthur | Dec 1896 | United States of America | Washington | Spirit Lake. | — |
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| Cirsium scariosum Nutt. | J. C. Arthur 5004 | 01 Aug 1912 | United States of America | Colorado | Ridgeway. | — |
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| Cytidia salicina (Fr.) Burt | J. C. Arthur s.n. | 20 Aug 1912 | United States of America | Colorado | Gilpin Co. Tolland | — |
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| Cytidia salicina (Fr.) Burt | J. C. Arthur s.n. | 20 Aug 1912 | United States of America | Colorado | Gilpin Co. Tolland | — |
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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 | — |
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| Carex arcta Boott | J. C. Arthur B100 | 17 Jul 1886 | United States of America | Minnesota | Vermilion Lake. | — |
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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.… | — |
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| Carex buxbaumii Wahlenb. | J. C. Arthur s.n. | 11 Jun 1874 | United States of America | Iowa | Charles City. | — |
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| Carex davisii Schwein. & Torr. | J. C. Arthur s.n. | 02 Jun 1877 | United States of America | Iowa | Ames. | — |
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| Carex hystricina Muhl. ex Willd. | J. C. Arthur s.n. | — | — | — | — |
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| Carex paupercula Michx. | J. C. Arthur 60 | 21 Sep 1909 | United States of America | Maine | Knox Co. Isle au Hart. | — |
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| Carex paupercula Michx. | J. C. Arthur B298 | 23 Jul 1886 | United States of America | Minnesota | St. Louis R. | — |
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| Carex umbellata Schkuhr ex Willd. | J. C. Arthur s.n. | 25 Jun 1887 | United States of America | Iowa | Spirit Lake. | — |
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| Carex tribuloides var. cristata Wahlenb. | J. C. Arthur 20 | 18 Jul 1877 | United States of America | Iowa | Story Co. | — |
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| Trametes versicolor (L.:Fr.) Lloyd | J. C. Arthur s.n. | Nov 1889 | United States of America | Indiana | Tippecanoe Co. Lafayette. | — |
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| Trametes versicolor (L.:Fr.) Lloyd | J. C. Arthur 5 | 11 May 1906 | United States of America | Indiana | Tippecanoe Co. Lafayette. | — |
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| Solidago missouriensis Nutt. | J. C. Arthur s.n. | 21 Aug 1877 | United States of America | Iowa | Story Co. | — |
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| Solidago rigida var. rigida | J. C. Arthur s.n. | 18 Sep 1877 | United States of America | Iowa | Story Co. Ames. | — |
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| Juncus nodosus L. | J. C. Arthur s.n. | 16 Jul 1872 | United States of America | Iowa | Floyd Co. Charles City. | — |
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| Juncus torreyi Coville | J. C. Arthur s.n. | 03 Aug 1874 | United States of America | Iowa | Floyd Co. Charles City. | — |
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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. | — |
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| Lonicera dioica L. | J. C. Arthur s.n. | 5/27/75 | United States of America | Iowa | Floyd Co. | — |
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| Cyathus olla (Batsch) Pers. | J. C. Arthur s.n. | Sep 1889 | United States of America | Indiana | Perrysville | — |
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| Secotium warnei Peck | J. C. Arthur s.n. | 08 Sep 1893 | United States of America | Indiana | Lafayette | — |
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| Synchytrium asari Arthur & Holw. | J. C. Arthur A86 | 24 Jul 1886 | United States of America | Minnesota | Vermilion Lake | — |
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| Bremia lactucae Regel | J. C. Arthur 1885-10-02 | — | United States of America | New York | Ontario Co. Geneva. | — |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur 118 | 14 Jul 1883 | United States of America | Illinois | Chicago | — |
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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. | — |
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| Lyophyllum decastes (Fr.) Singer | J. C. Arthur s.n. | 22 Oct 1906 | United States of America | Indiana | Lafayette | — |
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| Plasmopara halstedii (Farl.) Berl. | J. C. Arthur s.n. | 17 Jul 1904 | United States of America | Indiana | Tippecanoe Co. Lafayette | — |
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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 | — |
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| Plasmopara halstedii (Farl.) Berl. | J. C. Arthur s.n. | 28 Jul 1883 | United States of America | Iowa | Dickinson Co. Spirit Lake | — |
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| Albugo candida (Pers.) Roussel | J. C. Arthur s.n. | 04 Aug 1886 | United States of America | New Hampshire | Geneva | — |
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| Albugo ipomoaea-panduratae (C.Schweinf.) D.B.Swingle | J. C. Arthur s.n. | 08 Jul 1891 | United States of America | Indiana | Tippecanoe Co. Lafayette. | — |
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| Albugo ipomoaea-panduratae (C.Schweinf.) D.B.Swingle | J. C. Arthur s.n. | Sep 1895 | United States of America | Indiana | Lafayette | — |
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| Albugo ipomoaea-panduratae (C.Schweinf.) D.B.Swingle | J. C. Arthur 21176 | Oct 1921 | — | — | — |
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| Albugo tragopogonis (Pers.) Gray | J. C. Arthur s.n. | 14 Sep 1885 | United States of America | New York | Ontario Co. Geneva | — |
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| Mucor mucedo L. | J. C. Arthur s.n. | 09 Feb 1903 | United States of America | Indiana | Fayette | — |
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| Entomophthora phytonomi Arthur | J. C. Arthur s.n. | Nov 1885 | United States of America | New York | Ontario Co. Geneva. | — |
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| Entomophthora phytonomi Arthur | J. C. Arthur s.n. | Nov 1885 | United States of America | New York | Ontario Co. Geneva. | — |
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| Entomophthora phytonomi Arthur | J. C. Arthur s.n. | Nov 1885 | United States of America | New York | Ontario Co. Geneva. | — |
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| Entomophthora phytonomi Arthur | J. C. Arthur s.n. | Nov 1885 | United States of America | New York | Ontario Co. Geneva. | — |
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| Stropharia epimyces (Peck) G.F.Atk. | J. C. Arthur s.n. | 16 Oct 1905 | United States of America | Indiana | Tippecanoe Co. Lafayette | — |
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| Epichloë typhina | J. C. Arthur s.n. | Jul 1890 | United States of America | Indiana | Lafayette | — |
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| Leucostoma niveum (Hoffm.) Höhn. | J. C. Arthur 10376 | 21 Jul 1886 | United States of America | Minnesota | Vermilion Lake | — |
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| Phellinus everhartii (Ellis & Galloway) A.Ames | J. C. Arthur 22 | 06 Apr 1907 | United States of America | Illinois | Lake Co. Lake Forest | — |
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| Puccinia bolleyana Sacc. | J. C. Arthur s.n. | June 22/83 | — | — | Otis, Ind. [Indiana?] | — |
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| Coccomyces triangularis (Schwein.) Sacc. | J. C. Arthur s.n. | 18 Jun 1887 | United States of America | New York | Geneva | — |
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| Thyronectria balsamea (Cooke & F.Peck) Seeler | J. C. Arthur 178N | 22 Jul 1886 | United States of America | Minnesota | Vermilion Lake | — |
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| Fabraea maculata (Lév.) G.F.Atk. | J. C. Arthur s.n. | 24 Sep 1885 | — | — | — |
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| Fabraea maculata (Lév.) G.F.Atk. | J. C. Arthur s.n. | 16 Jul 1884 | United States of America | New York | Geneva | — |
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| Fabraea rosae (F.A.Wolf) Seaver | J. C. Arthur s.n. | 05 Oct 1892 | United States of America | Indiana | Tippecanoe Co. | — |
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| Xanthium strumarium var. canadense (Mill.) Torr. & A.Gray | J. C. Arthur 2606 | 14 Sep 1911 | United States of America | Colorado | Pueblo Co. Lake Minnequa | — |
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| Xanthium strumarium var. canadense (Mill.) Torr. & A.Gray | J. C. Arthur 2604 | 14 Sep 1911 | United States of America | Colorado | Pueblo Co. Lake Minnequa | — |
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| Pezicula ocellata (Pers.) Seaver | J. C. Arthur 388[?] | 18 Jul 1886 | United States of America | Minnesota | Vermilion Lake | — |
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| Puccinia dioicae Magnus var. dioicae | J. C. Arthur s.n. | 01 Jul 1901 | United States of America | Maine | Knox Co. Isle an Haut. | — |
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