Displaying 1 - 9 out of 9 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Juniperus horizontalis Moench | D. B. Douglass s.n. | 04 Jun 1820 - 13 Jun 1820 | United States of America | Michigan | — | 19520 |
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| Iris lacustris Nutt. | D. B. Douglass s.n. | 05 Jun 1820 | United States of America | Michigan | Presque Isle Co. Presque Isle,… | — | 2350622 |
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| Panaeolus subbalteatus (Berk. & Broome) Sacc. | D. B. Douglass s.n. | Aug 1916 | United States of America | Maine | East Boothbay, on coast 40… | — | 02770169 |
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| Viola canadensis L. | D. B. Douglass s.n. | s.d. | — | — | Lake Superior | — | 3592210 |
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| Trillium erectum var. flavum Torr. | D. B. Douglass s.n. | s.d. | United States of America | New York | Hamilton Co. | holotype | 319877 |
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| Panicum longisetum Torr. | D. B. Douglass s.n. | — | United States of America | — | [On the banks of Fox… | holotype | 381633 |
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| Xerophyllum douglasii S.Watson | D. B. Douglass s.n. | s.d. | United States of America | Oregon | possible isotype | 319954 |
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| Cerastium oblongifolium Torr. | D. B. Douglass s.n. | [1820] | United States of America | — | Cass's Expedition. | type | 3163220 |
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| Pinus banksiana Lamb. | D. B. Douglass s.n. | — | United States of America | Michigan | — | 49430 |
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