Displaying 1 - 50 out of 232 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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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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| Artemisia dracunculus L. | J. C. Arthur s.n. | Aug 1870 | United States of America | Iowa | Ames | — | 1893826 |
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| Cypripedium candidum Muhl. ex Willd. | J. C. Arthur s.n. | 2 Jun 1872 | United States of America | Iowa | Story Co. Ames | — | 4043820 |
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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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| 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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| 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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| 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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| Chara contraria A.Braun ex Kütz. | J. C. Arthur s.n. | 04 Jul 1874 | United States of America | Iowa | Cerro Gordo Co. Clear Lake | — | 02012436 |
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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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| 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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| 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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| 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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| Carex davisii Schwein. & Torr. | J. C. Arthur s.n. | 02 Jun 1877 | United States of America | Iowa | Ames. | — | 2261925 |
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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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| Dalea candida Willd. var. candida | J. C. Arthur s.n. | 14 Jul 1877 | United States of America | Iowa | Ames | — | 01073601 |
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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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| 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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| Bromus ciliatus L. | J. C. Arthur 734 | 1881 | United States of America | Iowa | — | 1634382 |
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| Puccinia albescens Grev. | J. C. Arthur s.n. | 22 May 1882 | United States of America | Iowa | Charles City | — | 3005687 |
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| Chara formosa C.B.Rob. | J. C. Arthur B | 10 Jul 1882 | United States of America | Minnesota | Hennepin Co. Lake Calhoun | — | 02017709 |
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| Chara braunii C.C.Gmel. | J. C. Arthur D | 14 Jul 1882 | United States of America | Minnesota | Hennepin Co. Oak Lake | — | 02017367 |
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| Chara compacta C.B.Rob. | J. C. Arthur C | 14 Jul 1882 | United States of America | Minnesota | Hennepin Co. Oak Lake | — | 02017711 |
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| Ricciella fluitans (L.) A.Br. | J. C. Arthur | 15 Jul 1882 | United States of America | Minnesota | Lake Minnetouka | — | 271384 | ||
| Chara contraria A.Braun ex Kütz. | J. C. Arthur E | 17 Jul 1882 | United States of America | Minnesota | Hennepin Co. Excelsior on Lake… | — | 02012432 |
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| Chara formosa C.B.Rob. | J. C. Arthur H | 24 Jul 1882 | United States of America | Minnesota | Hennepin Co. Lake Calhoun, in… | — | 02017724 |
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| Chara contraria A.Braun ex Kütz. | J. C. Arthur G | 24 Jul 1882 | United States of America | Minnesota | Hennepin Co. Lake Calhoun | — | 02012431 |
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| Chara formosa C.B.Rob. | J. C. Arthur F | 25 Jul 1882 | United States of America | Minnesota | Hennepin Co. | — | 02017710 |
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| Chara vulgaris L. | J. C. Arthur I | 27 Jul 1882 | United States of America | Minnesota | Hennepin Co. Minnehaha Falls, in… | — | 02018819 |
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| Chara contraria A.Braun ex Kütz. | J. C. Arthur J | 04 Aug 1882 | United States of America | Minnesota | Ramsey Co. Lake Phalen near… | — | 02012457 |
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| Chara intermedia A.Braun | J. C. Arthur K | 07 Aug 1882 | United States of America | Iowa | Floyd Co. Nora Springs, ditch… | — | 02018817 |
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| Gymnosporangium globosum (Farl.) Farl. | J. C. Arthur s.n. | 08 Aug 1882 | United States of America | Iowa | Floyd Co. Nora Springs | — | 3010317 |
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| Entyloma australe Speg. | J. C. Arthur s.n. | 18 Aug 1882 | United States of America | Iowa | Charles City | — | 3022335 |
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| Doassansia alismatis Nees | J. C. Arthur s.n. | 31 Aug 1882 | United States of America | Iowa | Charles City | — | 3022073 |
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| Phyllachora ambrosiae (Berk. & M.A.Curtis) Sacc. | J. C. Arthur s.n. | Sep 1882 | United States of America | Iowa | Floyd Co. | — | 3389248 |
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| Phyllachora ambrosiae (Berk. & M.A.Curtis) Sacc. | J. C. Arthur 1665 | Sep 1882 | United States of America | Iowa | Floyd Co. | — | 3389249 |
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| Phyllachora ambrosiae (Berk. & M.A.Curtis) Sacc. | J. C. Arthur 1665 | Sep 1882 | United States of America | Iowa | Floyd Co. | — | 3389250 |
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| Phyllachora ambrosiae (Berk. & M.A.Curtis) Sacc. | J. C. Arthur s.n. | Sep 1882 | United States of America | Iowa | Floyd Co. | — | 3389251 |
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| Chaetomella perforata Ellis & Everh. | J. C. Arthur 57 | Sep 1882 | United States of America | Iowa | Story Co. | lectotype | 00883467 |
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| Chaetomella perforata Ellis & Everh. | J. C. Arthur 57 | Sep 1882 | United States of America | Iowa | Story Co. | lectotype | 00883466 |
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| Ustilago spermophora Berk. & M.A.Curtis | J. C. Arthur s.n. | Sep 1882 | United States of America | Iowa | Floyd Co. | — | 3015390 |
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| Entyloma australe Speg. | J. C. Arthur s.n. | 12 Sep 1882 | United States of America | Iowa | Charles City | — | 3022333 |
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| Cercospora racemosa Ellis & G.Martin | J. C. Arthur 48 | 27 Sep 1882 | United States of America | Iowa | Floyd Co. | type | 00838158 |
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| Frullania eboracensis Lehm. | J. C. Arthur | 30 Sep 1882 | United States of America | Iowa | Dubuque Co. Charles City | — | 253963 | ||
| Gloeosporium toxicodendri Ellis & G.Martin | J. C. Arthur 35 | 30 Sep 1882 | United States of America | Iowa | Floyd Co. | type | 00937277 |
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| Coleroa plantaginis (Ellis) M.E.Barr | J. C. Arthur s.n. | 30 Sep 1882 | United States of America | Iowa | Floyd Co. | — | 2989961 |
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| Diatrype tiliacea Ellis | J. C. Arthur 86 | Oct 1882 | United States of America | Iowa | Story Co. | type | 00928607 |
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| Nectria peziza (Tode) Fr. | J. C. Arthur 64 | Nov 1882 | United States of America | Iowa | No locality. | — | 04470594 |