Displaying 501 - 517 out of 517 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Carex crus-corvi Shuttlew. ex Kuntze | A. Hayden 3286 | 03 Jul 1944 | United States of America | Iowa | Polk Co. Delaware Twp., about… | — | 2261556 |
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| Carex vulpinoidea Michx. | A. Hayden 3288 | 03 Jul 1944 | United States of America | Iowa | Polk Co. About one half… | — | 2310692 |
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| Solidago canadensis var. scabra Torr. & A.Gray | A. Hayden 3303 | 11 Aug 1944 | United States of America | Iowa | Clay Co. Freeman Twp.; east… | — | 2339402 |
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| Solidago rigida var. rigida | A. Hayden 3302 | 29 Sep 1944 | United States of America | Iowa | Boone Co. Jackson Twp. Prairie… | — | 2370733 |
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| Eragrostis pilosa (L.) P.Beauv. | A. Hayden s.n. | 17 Aug 1948 | United States of America | Iowa | Palo Alto Co. Highland Twp.,… | — | 1699956 |
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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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| Dalea enneandra Nutt. | A. Hayden 11324 | s.d. | United States of America | Iowa | Woodbury Co. Sioux City twp.,… | — | 01259277 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | A. Hayden 9269 | s.d. | United States of America | Iowa | Davis Co. Lick Creek Twp.,… | — | 1555882 |
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| Juncus dudleyi Wiegand | A. Hayden 233 | 2/7/39 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 2382662 |
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| Salix amygdaloides Andersson | A. Hayden 1043 | April 9, 1934; May 30, 1934 | United States of America | Iowa | Palo Alto Co. Highland Twp.… | — | 2404257 |
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| Salix exigua subsp. interior (Rowlee) Cronquist | A. Hayden 1014 | April 8, 1934; May 11, 1934 | United States of America | Iowa | Clay Co. Lake Twp. Along… | — | 2415143 |
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| Salix petiolaris Sm. | A. Hayden 6074 | — | United States of America | Iowa | Hancock Co. Ell Twp. On… | — | 2062358 |
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| Salix petiolaris Sm. | A. Hayden 6074 | — | United States of America | Iowa | Hancock Co. Ell Twp. On… | — | 2062376 |
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| Ulmus americana L. | A. Hayden 3091 | — | United States of America | Iowa | Clay Co. Peterson Twp., Sec.… | — | 2465724 |
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| Fraxinus pennsylvanica var. austinii Fernald | A. Hayden 8664 | June 31, 1941 | United States of America | Iowa | Woodbury Co. On an exposed… | — | 2500959 |
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| Fraxinus pennsylvanica var. campestris (Britton) F.C.Gates | A. Hayden 9657 | — | United States of America | Iowa | Clay Co. Lake Twp., Open… | — | 2501040 |
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| Tilia americana L. | A. Hayden 874 | May 2, 1936 (buds); June 19, 1936 (leafy shoot) | United States of America | Iowa | Clay Co. Base and middle… | — | 2557018 |
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