Displaying 1 - 25 out of 268 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Carex assiniboinensis W.Boott | O. A. Stevens 1-26468 | 15 Jun 1934 | United States of America | Minnesota | Moorhead. | — | 2236953 |
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| Lactuca ludoviciana (Nutt.) Riddell | O. A. Stevens 3 | 15 Jun 1922 | United States of America | Kansas | Blue Rapids. | — | 2925366 |
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| Lactuca ludoviciana (Nutt.) Riddell | O. A. Stevens 6 | 15 Jun 1922 | United States of America | Kansas | Blue Rapids. | — | 2925401 |
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| Polygonum stevensii Brenckle | O. A. Stevens 38 34 | 29 Jun 1938 | United States of America | Montana | South of Forsythe | holotype | 323816 |
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| Erigeron compositus var. glabratus Macoun | O. A. Stevens 38-060 | 30 Jun 1938 | United States of America | Montana | Carbon Co. Cooke Highway above… | — | 2078871 |
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| Carex geyeri Boott | O. A. Stevens 38-139 | 02 Jul 1938 | — | — | Yellowstone River. | — | 2277242 |
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| Antennaria rosea subsp. confinis (Greene) R.J.Bayer | O. A. Stevens 38-147 | 30 Jun 1938 | United States of America | Wyoming | Yellowstone Park. Obsidian Creek (Tuff… | — | 1879884 |
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| Elymus elymoides subsp. californicus (J.G.Sm.) Barkworth | O. A. Stevens 38-169 | 02 Jul 1938 | United States of America | — | Yellowstone Park Tour; Spring Lake;… | — | 1673721 |
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| Carex praticola Rydb. | O. A. Stevens 38-171 | 02 Jul 1938 | United States of America | Wyoming | Spring Lake east of Fishing… | — | 2298222 |
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| Carex microptera Mack. | O. A. Stevens 38-172 | 01 Jul 1938 | United States of America | — | Near Yellowstane Lake | — | 2291511 |
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| Carex hoodii Boott | O. A. Stevens 38-175 | July 1 | United States of America | Wyoming | Teton Co. Sandy meadow near… | — | 2191159 |
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| Carex microptera Mack. | O. A. Stevens 38-176 | 01 Jul 1938 | United States of America | — | Yellowstone Lake | — | 2291181 |
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| Carex canescens L. | O. A. Stevens 38-178 | 02 Jul 1938 | United States of America | — | Yellowstone Park. Spring Lake east… | — | 2253431 |
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| Carex athrostachya Olney | O. A. Stevens 38-179 | 02 Jul 1938 | United States of America | Wyoming | Yellowstone Park Tour. Spring Lake.… | — | 2237131 |
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| Carex raynoldsii Dewey | O. A. Stevens 38-184 | 02 Jul 1938 | United States of America | — | Yellowstone Park. Low beach along… | — | 2299033 |
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| Carex | O. A. Stevens 38-186 | 02 Jul 1938 | United States of America | — | Yellowstone Park. Spring Lake, east… | — | 2333839 |
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| Antennaria corymbosa E.E.Nelson | O. A. Stevens 38-214 | July 2, 1938 | United States of America | Wyoming | Yellowstone Park Tour, low beach… | — | 1889694 |
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| Antennaria rosea Greene subsp. rosea | O. A. Stevens 38-247 | 03 Jul 1938 | United States of America | Wyoming | Sheridan Co. meadow at pass… | — | 1880499 |
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| Carex norvegica Retz. | O. A. Stevens 38-265 | 03 Jul 1938 | United States of America | — | Yellowstone Park; Bondi's Camp, Bighorn… | — | 2309030 |
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| Antennaria rosea Greene subsp. rosea | O. A. Stevens 38-287 | 03 Jul 1938 | United States of America | Wyoming | Yellowstone Park. Below pass on… | — | 1880398 |
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| Poa alpina L. | O. A. Stevens 38-316 | 03 Jul 1938 | United States of America | Wyoming | Sheridan Co. Meadow at pass… | — | 1788846 |
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| Carex microptera Mack. | O. A. Stevens 38-324 | 03 Jul 1938 | United States of America | Wyoming | Big Horn Co. Below pass… | — | 2291182 |
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| Oenothera coronopifolia Torr. & A.Gray | O. A. Stevens 38-333 | 04 Jul 1938 | United States of America | Wyoming | Crook Co. roadside near Moorcroft | — | 3350961 |
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| Astragalus miser var. hylophilus (Rydb.) Barneby | O. A. Stevens 39-311 | 30 Jul 1939 | United States of America | Wyoming | Mt. Washburn. Yellowstone Park | — | 1261608 |
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| Rorippa austriaca (Crantz) Besser | O. A. Stevens 234 | 22 Jun 1937 | United States of America | North Dakota | Cass Co. Hickson | — | 2392912 |
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