Displaying 1 - 50 out of 2344 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Abietinella abietina (Hedw.) M.Fleisch. | T. C. Porter | 12 Jul 1892 | United States of America | Colorado | Glen Eyrie | — | ||||
| Abietinella abietina (Hedw.) M.Fleisch. | T. C. Porter | 01 Jul 1872 | United States of America | Colorado | Glen Eyrie, near Colorado Springs | — | ||||
| Acanthospermum australe (Loefl.) Kuntze | T. C. Porter s.n. | 01 Sep 1891 | United States of America | North Carolina | Weldon | — |
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| Acer saccharum Marshall | T. C. Porter s.n. | July '91 | United States of America | Pennsylvania | Northampton Co. | — |
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| Acer saccharum Marshall | T. C. Porter 2 & 1 | Apr. 26/89 | United States of America | Pennsylvania | Northampton Co. | — |
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| Acer saccharum Marshall | T. C. Porter s.n. | May 1/89 | United States of America | Pennsylvania | Northampton Co. | — |
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| Acer spicatum Lam. | T. C. Porter 5104 | 17 Jun 1868 | United States of America | Pennsylvania | Schuylkill Co. | — |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | T. C. Porter s.n. | May - June 1871 | United States of America | Utah | Near Ogden. Hayden. | — |
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| Achnatherum robustum (Vasey) Barkworth | T. C. Porter s.n. | Aug. 12/73 | United States of America | Colorado | El Paso Co. Colorado Springs. | — |
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| Aconitum columbianum Nutt. subsp. columbianum | T. C. Porter 3371 | 29 Jul 1873 | United States of America | Utah | Uinta Mountains, Utah Territory | — |
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| Aconitum columbianum Nutt. subsp. columbianum | T. C. Porter s.n. | 29 Jul 1873 | United States of America | Utah | Uinta Mountains, Utah Territory | paratype |
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| Aconitum columbianum Nutt. subsp. columbianum | T. C. Porter s.n. | 29 Jul 1873 | United States of America | Utah | Uinta Mountains, Utah Territory | — |
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| Actaea pachypoda Elliott | T. C. Porter s.n. | 01 Jul 1899 | United States of America | New Jersey | Warren Co. Marble Hill, above… | — |
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| Actinella grandiflora var. glabrata Porter | T. C. Porter s.n. | Aug 1874 | United States of America | Colorado | Sangre de Cristo Range, C.… | possible isotype |
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| Actinella grandiflora var. glabrata Porter | T. C. Porter s.n. | Aug 1874 | United States of America | Colorado | Sangre de Cristo Range, C.… | possible isotype |
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| Adenocaulon bicolor Hook. | T. C. Porter s.n. | Jul 1865 | United States of America | Michigan | Near Sault Ste. Marie. | — |
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| Adenocaulon bicolor Hook. | T. C. Porter s.n. | s.d. | — | — | Lake Superior | — |
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| Adiantum pedatum L. | T. C. Porter 42 | 1874 | United States of America | Pennsylvania | Easton | — |
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| Aesculus flava Sol. | T. C. Porter s.n. | 1871 | United States of America | Pennsylvania | — |
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| Aesculus parviflora Walter | T. C. Porter s.n. | Fl. July 12, Ft. Aug. 6, 1891 | United States of America | Pennsylvania | Northampton Co. College Campus | — |
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| Aesculus parviflora Walter | T. C. Porter s.n. | July 4/91 | — | — | College Campus | — |
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| Aesculus parviflora Walter | T. C. Porter s.n. | July-Aug/91 | — | — | College Campus | — |
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| Aesculus pavia L. | T. C. Porter 5124 | — | United States of America | South Carolina | — |
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| Aethusa cynapium L. | T. C. Porter s.n. | 16 Oct 1899 | United States of America | Pennsylvania | Delaware Co. | — |
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| Aethusa cynapium L. | T. C. Porter s.n. | 16 Oct 1899 | United States of America | Pennsylvania | Delaware Co. | — |
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| Agastache urticifolia (Benth.) Kuntze var. urticifolia | T. C. Porter s.n. | s.d. | United States of America | Utah | — |
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| Agoseris | T. C. Porter 10080 | Jul 1873 | United States of America | Wyoming | Fort Bridger. | — |
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| Agoseris glauca (Pursh) Raf. var. glauca | T. C. Porter s.n. | Jul 1873 - Aug 1873 | United States of America | Wyoming | Fort Bridger. W.T. [Wyoming Territory] | — |
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| Agrimonia parviflora Aiton | T. C. Porter s.n. | — | United States of America | Pennsylvania | Dauphin Co. | — |
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| Agrostis canina L. | T. C. Porter s.n. | May 26 & June 14 / 87 | United States of America | Pennsylvania | Northampton Co. Pot Rock, on… | — |
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| Agrostis canina L. | T. C. Porter s.n. | 09 Jun 1869 | United States of America | Pennsylvania | Clarion Co. Near Easton. [Inferred… | — |
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| Agrostis canina L. | T. C. Porter s.n. | 09 Jun 1869 | United States of America | Pennsylvania | Clarion Co. Near Easton. [Inferred… | — |
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| Agrostis canina L. | T. C. Porter 878 | 09 Jun 1869 | United States of America | Pennsylvania | Clarion Co. Near Easton. [Inferred… | — |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | T. C. Porter s.n. | June 11/92 | United States of America | Pennsylvania | Northampton Co. Pot Rock, on… | — |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | T. C. Porter s.n. | 24 Jul 1872 | United States of America | Colorado | Upper Arkansas, Col. Ter. | — |
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| Agrostis perennans (Walter) Tuck. | T. C. Porter s.n. | 26 Aug 1861 | United States of America | Pennsylvania | Lancaster Co. Bk of Conestoga,… | — |
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| Agrostis perennans (Walter) Tuck. | T. C. Porter s.n. | Aug 1871 | United States of America | Wyoming | Yellowstone Lake. Hayden. | — |
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| Agrostis perennans (Walter) Tuck. | T. C. Porter s.n. | 27 Jul 1871 | United States of America | Wyoming | Mud Springs, Upper Yellowstone. Hayden. | — |
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| Agrostis perennans (Walter) Tuck. | T. C. Porter 880 | s.d. | United States of America | New Jersey | — |
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| Aliciella pinnatifida (Nutt. ex A.Gray) J.M.Porter | T. C. Porter s.n. | 15 Jul 1872 | United States of America | Colorado | Denver, Col. Territory. | — |
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| Allium acuminatum Hook. | T. C. Porter s.n. | 1872 | United States of America | Wyoming | Uintah Mtns | — |
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| Allium brevistylum S.Watson | T. C. Porter s.n. | 19 Jul 1873 | United States of America | Utah | Uinta Mtns. | — |
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| Allium brevistylum S.Watson | T. C. Porter s.n. | 28 Jul 1871 | United States of America | Wyoming | Yellowstone Lake | — |
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| Allium brevistylum S.Watson | T. C. Porter s.n. | Jul 1873 | United States of America | Wyoming | Fort Bridger. Wyoming Territory | — |
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| Allium geyeri S.Watson | T. C. Porter s.n. | Jul 1873 | United States of America | Wyoming | Fort Bridger. Wyoming Territory | — |
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| Alnus incana (L.) Moench | T. C. Porter 2603 | 01 Jul 1873 | United States of America | Wyoming | Fort Bridger | — |
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| Alnus incana (L.) Moench | T. C. Porter s.n. | 25 Jun 1869 | United States of America | New Jersey | Morris Co. Budd's Lake. | — |
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| Alnus incana subsp. rugosa (Du Roi) R.T.Clausen | T. C. Porter s.n. | July 31/99 | United States of America | Pennsylvania | Northampton Co. | — |
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| Alnus incana subsp. rugosa (Du Roi) R.T.Clausen | T. C. Porter s.n. | July 31/99 | United States of America | Pennsylvania | Northampton Co. | — |
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| Alnus incana subsp. rugosa (Du Roi) R.T.Clausen | T. C. Porter s.n. | 18 Jul 1899 | United States of America | Pennsylvania | Northampton Co. Chain Dam Island… | — |
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