Displaying 1 - 25 out of 513 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Andropogon gerardii Vitman | A. Hayden 1 | 27 Aug 1934 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 1639246 |
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| Equisetum arvense L. | A. Hayden 9,133 | 26 Jun 1937 | United States of America | Iowa | Davis Co. Lick Creek Twp.… | — | 3509921 |
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| Thelypteris palustris var. pubescens (G.Lawson) Schott & Fernald | A. Hayden 10,292 | 13 Sep 1937 | United States of America | Iowa | Allamakee Co. French Creek Twp.… | — | 3795766 |
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| Glyceria grandis S.Watson | A. Hayden 15 | 24 Jul 1934 | United States of America | Iowa | Clay Co. Lake twp., Sec.… | — | 1775449 |
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| Glyceria striata (Lam.) Hitchc. | A. Hayden 17 | 14 Aug 1934 | United States of America | Iowa | Emmet Co. Center twp., Sec.… | — | 1724298 |
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| Poa compressa L. | A. Hayden 19 | 07 Aug 1934 | United States of America | Iowa | Clay Co. Freeman Twp., Sec.… | — | 1789519 |
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| Poa palustris L. | A. Hayden 20 | 17 Jul 1934 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 1792997 |
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| Poa palustris L. | A. Hayden 21 | 17 Jul 1934 | United States of America | Iowa | Clay Co. N. W. Mud… | — | 1792995 |
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| Carya ovata (Mill.) K.Koch | A. Hayden 23 | 10 Nov 1937 | United States of America | Iowa | Boone Co. On Eppert farm… | — | 1485036 |
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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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| Bromus inermis Leyss. | A. Hayden 28 | 26 Jun 1934 | United States of America | Iowa | Emmet Co. Estherville twp., Sec.… | — | 1636304 |
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| Glyceria grandis S.Watson | A. Hayden 38 | 25 Jun 1934 | United States of America | Iowa | Clay Co. Lake twp. Sec.… | — | 1775448 |
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| Eragrostis pectinacea (Michx.) Nees | A. Hayden 41 | 20 Aug 1934 | United States of America | — | Palo Alto, Highland Twp. Sec.… | — | 1699581 |
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| Agrostis perennans (Walter) Tuck. | A. Hayden 42 | 26 Jul 1934 | United States of America | — | Emmet, Emmet twp. Sec. 18.… | — | 1557089 |
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| Poa nemoralis L. | A. Hayden 45 | 14 Aug 1934 | United States of America | Iowa | Clay Co. Freeman Twp. Along… | — | 1792080 |
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| Hesperostipa comata (Trin. & Rupr.) Barkworth | A. Hayden 46 | 20 Jun 1934 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 1701579 |
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| Carex lacustris Willd. | A. Hayden 54 | 26 Jun 1934 | United States of America | Iowa | Clay Co. Lake Twp. North… | — | 00879630 |
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| Carex atherodes Spreng. | A. Hayden 54 | 26 Jun 1934 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 2236962 |
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| Carex atherodes Spreng. | A. Hayden 54 | 26 Jun 1934 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 2236969 |
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| Carex comosa Boott | A. Hayden 57 | 25 Jun 1934 | United States of America | Iowa | Clay Co. Lake Twp., North… | — | 2259755 |
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| Muhlenbergia asperifolia (Nees & Meyen) Parodi | A. Hayden 62 | 05 Sep 1935 | United States of America | Iowa | Clay Co. Lake Twp. Sec.… | — | 1740402 |
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| Muhlenbergia asperifolia (Nees & Meyen) Parodi | A. Hayden 63 | 08 Aug 1935 | United States of America | Iowa | Clay Co. Lake Twp. Sec.… | — | 1740407 |
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| Phalaris arundinacea L. | A. Hayden 65 | June 21, 1935 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 1744905 |
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| Glyceria striata (Lam.) Hitchc. | A. Hayden 77 | 15 Jun 1938 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 1724297 |
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| Glyceria striata (Lam.) Hitchc. | A. Hayden 78 | 20 May 1935 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 1724296 |
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