Displaying 1 - 25 out of 31 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Stellaria longipes var. minor Hook. | D. Houghton 59 | Aug 1831 | United States of America | — | Damp sandy shore of Lake… | possible type | 353070 |
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| Cyperus houghtonii Torr. | D. Houghton 73 | Aug 1831 | United States of America | Wisconsin | Sawyer Co. Lake of the… | type | 11671 | ||
| Dalea candida var. oligophylla (Torr.) Shinners | D. Houghton 65 | Aug 1831 | United States of America | — | Upper Mississippi R. | — | 1241300 |
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| Dalea purpurea Vent. var. purpurea | D. Houghton 64 | Aug 1831 | United States of America | — | Upper Missisippi River | — | 1277529 |
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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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| Malva houghtonii Torr. & A.Gray | D. Houghton 57 | Aug 1831 | United States of America | — | Northwest Territory; Cap ville | lectotype | 221678 |
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| Sagittaria rigida Pursh | D. Houghton s.n. | 1831 | United States of America | — | Lake Superior | — | 3730167 |
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| Carex chordorrhiza Ehrh. | D. Houghton s.n. | Jun 1832 | United States of America | Michigan | Chippewa Co. Pr. Iriquois -… | — | 2255321 |
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| Synthyris houghtoniana Benth. | D. Houghton 70 | Jul 1832 | United States of America | — | Mississippi River above the Falls… | holotype | 130704 |
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| Penstemon grandiflorus Nutt. | D. Houghton 69 | Jul 1832 | United States of America | Minnesota | Hennepin Co. Falls of St.… | — | 601083 |
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| Carex houghtoniana Torr. ex Dewey | D. Houghton 7 | Jul 1832 | United States of America | — | Lac La Biche [Elk Lake… | type | 11157 |
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| Bromus kalmii A.Gray | D. Houghton 17 | Jul 1832 | United States of America | — | [Wisconsin.] Falls of Peckagama [Pokegama],… | — | 1318576 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | D. Houghton 16 | Jul 1832 | — | — | Lake Winnipegs. | — | 1645360 |
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| Coreopsis palmata Nutt. | D. Houghton s.n. | Jul 1832 | United States of America | Minnesota | Dry prairie of the upper… | — | 2066341 |
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| Erigeron philadelphicus L. | D. Houghton | Jul 1832 | United States of America | Minnesota | low meadows at the junction… | — | 2093141 |
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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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| Erigeron glabellus Nutt. var. glabellus | D. Houghton | Aug 1832 | Canada | Northwest Territories | St. Croix River | — | 2089852 |
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| Eleocharis palustris (L.) Roem. & Schult. | D. Houghton 12 | 1832 | United States of America | Minnesota | West Savannah River of the… | — | 2343584 |
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| Lycopodium clavatum L. | D. Houghton s.n. | 09 Jun 1838 | United States of America | Michigan | 6 mi below Port Huron. | — | 3329597 |
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| Erigeron philadelphicus L. | D. Houghton | 21 Jun 1838 | United States of America | Michigan | Washtenaw Co. near Whitmore's Lake | — | 2093187 |
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| Coreopsis palmata Nutt. | D. Houghton s.n. | 23 Jul 1838 | United States of America | Michigan | Kalamazoo Co. Grand Prairie. | — | 2066312 |
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| Amaranthus cannabinus (L.) J.D.Sauer | D. Houghton s.n. | 06 Aug 1838 | United States of America | Michigan | Kalamazoo | — | 3363661 |
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| Bartonia virginica (L.) Britton, Sterns & Poggenb. | D. Houghton s.n. | 20 Aug 1838 | United States of America | Michigan | Berrien Co. | — | 165016 |
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| Artemisia campestris var. caudata (Michx.) E.J.Palmer & Steyerm. | D. Houghton s.n. | 25 Aug 1838 | United States of America | Michigan | Cass Co [?]. Sandy shore… | — | 1893158 |
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