Harvard University Herbaria & Libraries

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Asteraceae
GH: 00968289 Artemisia campestris caudata (Michaux) H. M. Hall & Clements Canada: Ontario Point aux Pins; St. Marys River D. Houghton 1831
GH: 02348787 Erigeron glabellus pubescens Hooker USA: Wisconsin [data not captured] D. Houghton
GH: 02348786 Erigeron glabellus pubescens Hooker USA: Wisconsin [data not captured] D. Houghton 45 1831-7
GH: 02351754 Erigeron strigosus Muhlenberg ex Willdenow USA: [data not captured] D. Houghton 46 1931-8
GH: 02204553 Heterotheca villosa ballardii (Rydberg) Semple USA: Minnesota [data not captured] D. Houghton
Bartramiaceae
FH: 01137658 Bartramia fontana (Hedwig) Turner : Lake Superior: [data not captured] D. Houghton 1932-6
Boraginaceae
GH: 02026293 Cynoglossum virginianum boreale (Fernald) Cooperrider USA: Michigan Sault Ste. Marie: Sault Ste. Marie D. Houghton 42 1831-6
Brassicaceae
GH: 00986904 Descurainia pinnata brachycarpa (Richardson) Detling USA: Michigan [data not captured] D. Houghton
Cyperaceae
GH: 02369448 Carex chordorrhiza Ehrhart ex Linnaeus f. USA: Michigan [data not captured] D. Houghton 1832-6-8
GH: 02391724 Carex echinata Murray USA: Michigan [data not captured] D. Houghton 24 1831-6
GH: 00027627 Cyperus houghtonii Torrey USA: Wisconsin Lake of the Isles D. Houghton [73] 1831-8-4
Ericaceae
GH: 01594549 Kalmia polifolia Wangenheim USA: Michigan Pt. Iroqouis, Lk. Sup[erior]. D. Houghton 50 1832-6-8
Haloragaceae
GH: 01628220 Myriophyllum sibiricum Komarov USA: Michigan Bois Brule River D. Houghton 1832
Hippuridaceae
GH: 02000477 Hippuris vulgaris Linnaeus USA: Wisconsin [data not captured] D. Houghton 1831
Lamiaceae
GH: 01598554 Physostegia virginiana (Linnaeus) Bentham USA: Wisconsin Red Cedar River D. Houghton
Onagraceae
GH: 01625004 Calylophus serrulatus (Nuttall) P. H. Raven USA: Minnesota [data not captured] D. Houghton
Orchidaceae
AMES: 02031769 Calopogon tuberosus (Linnaeus) Britton, Stearn & Poggenburg USA: Michigan 2 miles west of Ann Arbor D. Houghton 1838-6-23
GH: 02029460 Calypso bulbosa (Linnaeus) Oakes USA: Michigan Near Forty Mile Point, Lake Superior D. Houghton 1838-6-20
AMES: 02066039 Coeloglossum viride bracteata (Muhlenberg) Grey USA: Michigan Port Huron: [no additional data] D. Houghton 1838-5-31
AMES: 01937700 Cypripedium candidum Muhlenberg ex Willdenow USA: Michigan [no additional data] D. Houghton
AMES: 02065472 Cypripedium reginae Walter USA: Michigan Ann Arbor: [no additional data] D. Houghton 1838-6-25
AMES: 02066572 Platanthera ciliaris (Linnaeus) Lindley USA: Michigan Kalamazoo: Austin's Lake D. Houghton 1838-7-30
AMES: 02066871 Platanthera clavellata (Michaux) Luer USA: Michigan St. Joseph D. Houghton 1838-8-13
AMES: 02045135 Platanthera flava herbiola (R. Brown) Luer USA: Michigan Jackson D. Houghton 1838-7-12
AMES: 02046041 Platanthera leucophaea (Nuttall) Lindley USA: Michigan Jackson D. Houghton 1838-7-9
AMES: 02051989 Pogonia ophioglossoides (Linnaeus) Ker Gawler USA: Michigan 2 miles west of Ann Arbor D. Houghton 1838-6-23
Ranunculaceae
GH: 01665059 Ranunculus hispidus caricetorum (Greene) T. Duncan USA: Michigan Lake Superior [Houghton traveled along the s... D. Houghton 1840
Rosaceae
GH: 01728433 Amelanchier laevis Wiegand USA: Michigan Port Huron. Bank of Black river. D. Houghton 1838-6-2
GH: 01728435 Amelanchier laevis Wiegand USA: Michigan Port Huron. D. Houghton 1838-5-30
GH: 01730087 Amelanchier neglecta (Eggleston) K. R. Cushman, M. B. Burgess, E. T. Doucette & C. S. Campbell USA: Michigan Port Huron D. Houghton 1838-5-30
GH: 01609183 Geum canadense Jacquin USA: Michigan Ann Arbor: Ann Arbor D. Houghton 1838-6-29
GH: 01570995 Potentilla tridentata Aiton USA: Michigan Sault Ste. Marie: Sault St. Marie D. Houghton
Saxifragaceae
GH: 01712925 Mitella cordifolia Lamarck USA: Michigan Near Port Huron D. Houghton 1838-6-9