Displaying 476 - 517 out of 517 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Carya ovata (Mill.) K.Koch | A. Hayden 17a | 06 Nov 1937 | United States of America | Iowa | Story Co. In Clear Creek… | — | 1485132 |
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| Carya ovata (Mill.) K.Koch | A. Hayden 1091a | 27 May 1937 | United States of America | Iowa | Story Co. east side of… | — | 1484956 |
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| Rosa rudiuscula Greene | A. Hayden 11571 | 16 Jun 1932 | United States of America | Iowa | Story Co. Nevada Twp., Sec.… | — | 2862737 |
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| Salix x fragilis L. | A. Hayden 11004 | 17 May 1938 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 2416118 |
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| Salix x fragilis L. | A. Hayden 1044 | 09 Apr 1933 | United States of America | Iowa | Palo Alto Co. Highland Twp.… | — | 2416143 |
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| Salix x fragilis L. | A. Hayden 10998 | 13 Oct 1938 | United States of America | Iowa | Clay Co. Freeman Twp. On… | — | 2416144 |
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| Betula L. | A. Hayden 10308 | 13 Sep 1937 | United States of America | Iowa | Allamakee Co. Union City Twp. | — | 2477840 |
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| Chamaecrista fasciculata (Michx.) Greene | A. Hayden 430 | 15 Aug 1933 | United States of America | Iowa | Story Co. Palestine Twp. C… | — | 01453767 |
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| Eragrostis pectinacea (Michx.) Nees | A. Hayden s.n. | 03 Sep 1948 | United States of America | Iowa | Palo Alto Co. Booth Twp.… | — | 1683653 |
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| Alopecurus aequalis Sobol. | A. Hayden 9280 | 14 Jul 1939 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 1637662 |
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| Pithophora oedogonia (Mont.) Wittr. | A. Hayden s.n. | 10 Oct 1909 | United States of America | Missouri | Saint Louis Co. Tower Grove… | — | 02134019 |
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| Pithophora oedogonia (Mont.) Wittr. | A. Hayden s.n. | 10 Oct 1909 | United States of America | Missouri | Saint Louis Co. Tower Grove… | — | 02134020 |
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| Typha angustifolia L. x T. latifolia L. | A. Hayden 9326 | 25 Jul 1939 | United States of America | Iowa | Osceola Co. Horton Twp., Sec.… | — | 02434076 |
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| Typha angustifolia L. x T. latifolia L. | A. Hayden 8604 | 01 Jul 1940 | United States of America | Iowa | Clay Co. Lake Twp. Sec.… | — | 02434079 |
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| Typha angustifolia L. x T. latifolia L. | A. Hayden 8740 | 05 Jul 1940 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 02434085 |
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| Typha latifolia L. | A. Hayden 777 | 10 Jul 1934 | United States of America | Iowa | Palo Alto Co. Highland Twp.… | — | 2434210 |
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| Typha latifolia L. | A. Hayden 713 | 18 Jul 1936 | United States of America | Iowa | Clay Co. Freeman Twp. Barringer's… | — | 2434283 |
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| Typha latifolia L. | A. Hayden 8606 | 01 Jul 1941 | United States of America | Iowa | Clay Co. Lake Twp. Near… | — | 2434309 |
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| Typha latifolia L. | A. Hayden 9324 | 01 Aug 1939 | United States of America | Iowa | Clay Co. Lake Twp. Common… | — | 2434313 |
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| Typha angustifolia L. | A. Hayden 8596 | 20 Jun 1940 | United States of America | Iowa | Bremer Co. Maxfield Twp. About… | — | 02432376 |
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| Typha angustifolia L. | A. Hayden 772 | 20 Jul 1934 | United States of America | Iowa | Palo Alto Co. Highland Twp.… | — | 02432411 |
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| Acer negundo L. | A. Hayden 872 | 15 May 1936 | United States of America | Iowa | Clay Co. Two miles south… | — | 2485201 |
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| Acer saccharinum L. | A. Hayden 7156 | 15 Oct 1940 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 2488636 |
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| Acer saccharinum L. | A. Hayden 9754 | 09 Jul 1939 | United States of America | Iowa | Clay Co. Lake twp., Sec.… | — | 2488712 |
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| Acer saccharinum L. | A. Hayden 7157 | 01 Sep 1940 | United States of America | Iowa | Cerro Gordo Co. Clear Lake… | — | 2488737 |
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| Acer nigrum F.Michx. | A. Hayden 871 | 16 Oct 1936 | United States of America | Iowa | Clay Co. Slopes of wooded… | — | 2486976 |
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| Aesculus glabra Willd. | A. Hayden 11348 | 25 Apr 1938 | United States of America | Iowa | Davis Co. Sec. 15. About… | — | 2497483 |
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| Aesculus glabra Willd. | A. Hayden 11347 | 22 Apr 1938 | United States of America | Iowa | Davis Co. Sec. 15. 1… | — | 2497484 |
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| Aesculus glabra Willd. | A. Hayden 7145 | 14 May 1939 | United States of America | Iowa | Madison Co. Lincoln Twp., Sec.… | — | 2497548 |
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| Aesculus glabra Willd. | A. Hayden 9832 | 26 Oct 1939 | United States of America | Iowa | Davis Co. Salt Creek twp.… | — | 2497593 |
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| Quercus stellata Wangenh. | A. Hayden 8409 | 16 Nov 1941 | United States of America | Iowa | Henry Co. Salem Twp. Near… | — | 1464226 |
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| Symphyotrichum falcatum (Lindl.) G.L.Nesom | A. Hayden s.n. | Sep 1926 | United States of America | South Dakota | Near Belle Fourche | — | 1847922 |
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| Artemisia frigida Willd. | A. Hayden s.n. | Sep 1926 | United States of America | South Dakota | Near Belle Fourche | — | 1894295 |
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| Rosa blanda Aiton | A. Hayden 9462 | 06 Jun 1939 | United States of America | Iowa | Clayton Co. About two miles… | — | 2855156 |
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| Eragrostis cilianensis (All.) Vignolo ex Janch. | A. Hayden 10929 | 01 Oct 1938 | United States of America | Iowa | Davis Co. Lick Creek Twp.,… | — | 1682167 |
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| Cirsium arvense (L.) Scop. | A. Hayden 10840 | 16 Aug 1934 | United States of America | Iowa | Clay Co. Lake Twp. Sec.… | — | 409518 |
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| Symphyotrichum ericoides (L.) G.L.Nesom | A. Hayden 11113 | 11 Oct 1934 | United States of America | Iowa | Kossuth Co. Five mi N… | — | 1847101 |
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| Muhlenbergia cuspidata (Torr. ex Hook.) Rydb. | A. Hayden 24 | 02 Aug 1934 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 1755941 |
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| Symphyotrichum ericoides (L.) G.L.Nesom | A. Hayden 11108 | 30 Aug 1936 | United States of America | Iowa | Clay Co. Five mi NE… | — | 1846974 |
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| Pithophora oedogonia (Mont.) Wittr. | A. Hayden s.n. | 10 Oct 1909 | United States of America | Missouri | Saint Louis Co. Tower Grove… | — | 02349308 |
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| Anthyllis vulneraria L. | A. Hayden s.n. | Jul 1925 | United States of America | Iowa | Wright Co. Clarion | — | 1043271 |
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| Cirsium canescens Nutt. | A. Hayden s.n. | 02 Aug 1926 | United States of America | Iowa | Buena Vista Co. | — | 02042394 |
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