Displaying 26 - 31 out of 31 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Erigeron philadelphicus L. | D. Houghton | Jul 1832 | United States of America | — | Falls of Peckagama, Upper Mississippi | — | 2093304 |
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| Betula glandulifera (Regel) B.T.Butler | D. Houghton 68 | July 1832 | — | — | Survey of the Savannah R.… | — | 2475768 |
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| Equisetum variegatum Schleich. ex F.Weber & D.Mohr var. variegatum | D. Houghton 6 | Aug 1831 | Unknown | — | Shore of Lake Michigan | — | 3518504 |
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| Cardamine pratensis L. | D. Houghton s.n. | s.d. | — | — | Lake Superior | — | 3178200 |
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| Sagittaria rigida Pursh | D. Houghton s.n. | 1831 | United States of America | — | Lake Superior | — | 3730167 |
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| Malva houghtonii Torr. & A.Gray | D. Houghton 57 | Aug 1831 | United States of America | — | Northwest Territory; Cap ville | lectotype | 221678 |
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