Displaying 1 - 50 out of 452 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Abies concolor (Gordon) Lindl. ex Hildebr. | J. T. Rothrock 786 | 1874 | United States of America | — | — | 29132 |
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| Abronia angustifolia Greene | J. T. Rothrock 340 | 1874 | United States of America | Arizona | — | 3370294 |
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| Acer negundo L. | J. T. Rothrock 20 | 1874 | United States of America | New Mexico | Santa Fe Co. | — | 2485012 |
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| Aegiphila elata Sw. | J. T. Rothrock 158 | 17 Jan 1890 | Cayman Islands | George Town | Grand Cayman. | — | 1337142 |
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| Agave palmeri Engelm. | J. T. Rothrock 496 | 1874 | United States of America | Arizona | — | 3781010 |
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| Ageratina tristis (DC.) R.M.King & H.Rob. | J. T. Rothrock 438 | dec 1890 - mar 1891 | Jamaica | — | British West Indies. | — | 1626511 |
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| Ageratina tristis (DC.) R.M.King & H.Rob. | J. T. Rothrock 466 | 12 Dec 1890 | Jamaica | Portland | Blue Mountains. | — | 1626515 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | J. T. Rothrock s.n. | s.d. | Canada | British Columbia | North British Columbia. | — | 1555500 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | J. T. Rothrock s.n. | 1865-66 | Canada | British Columbia | — | 1555561 |
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| Agrostis perennans (Walter) Tuck. | J. T. Rothrock s.n. | 1865-66 | Canada | British Columbia | Northern British Columbia | — | 1556686 |
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| Allionia choisyi Standl. | J. T. Rothrock 107 | s.d. | United States of America | New Mexico | [Covero?] | — | 4268609 |
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| Allionia incarnata var. villosa (Standl.) B.L.Turner | J. T. Rothrock 324 | 1874 | United States of America | Arizona | Ask Ck. | — | 3371269 |
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| Allium kunthii G.Don | J. T. Rothrock 542 | 1874 | United States of America | Arizona | — | 3763541 |
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| Alnus maritima (Marshall) Muhl. ex Nutt. | J. T. Rothrock 2605s.n. | 19 Aug 1879 | United States of America | Virginia | Eastern Shore of Virginia along… | — | 752459 |
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| Alvaradoa arborescens Griseb. | J. T. Rothrock 527 | 1890 - 1891 | Bahamas | New Providence | New Providence. | — | 01404179 |
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| Ambrosia trifida L. | J. T. Rothrock 695 | 1874 | United States of America | Arizona | Southern Arizona | — | 1884465 |
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| Amorpha fruticosa L. | J. T. Rothrock s.n. | — | United States of America | Arizona | Willow Spring | — | 2559591 |
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| Aphanostephus arizonicus A.Gray | J. T. Rothrock 336 | 1874 | United States of America | Arizona | Gila Valley. | isotype | 158327 |
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| Apiosporina collinsii (Schwein.) Höhn. | J. T. Rothrock s.n. | 1887 | United States of America | Pennsylvania | Along the Juniata | — | 2989823 |
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| Arceuthobium douglasii Engelm. | J. T. Rothrock 69 | Jun 1874 | United States of America | New Mexico | Santa Fe Co. | — | 3705884 |
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| Arceuthobium douglasii Engelm. | J. T. Rothrock 64 | 1874 | United States of America | Arizona | — | 3705886 |
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| Arctostaphylos tomentosa (Pursh) Lindl. | J. T. Rothrock 440 | August | United States of America | Arizona | Mt. Graham, Arizona. | — | 2517628 |
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| Arenaria lanuginosa var. saxosa (A.Gray) Zarucchi, R.L.Hartm. & Rabeler | J. T. Rothrock 3-a | Jul 1874 | United States of America | Arizona | Willow Spring | — | 3160418 |
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| Argythamnia candicans Sw. | J. T. Rothrock 269 | 22 Nov 1890 | Bahamas | San Salvador | Watlings Island. | — | 1384200 |
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| Aristida ternipes var. floridana (Chapm.) Sánchez-Ken & Dávila | J. T. Rothrock 548 | 1890 - 1891 | Bahamas | — | Eleuthera, Eleuthera. | — | 1659661 |
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| Aristida ternipes var. ternipes | J. T. Rothrock 260 | 27 Nov 1890 | Bahamas | Crooked Island and Long Cay | Fortune Island. | — | 1659675 |
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| Arnica chamissonis Less. | J. T. Rothrock 36 | 1865 - 1866 | Canada | British Columbia | Northern British Columbia. | — | 1870539 |
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| Arnica chamissonis Less. | J. T. Rothrock 49 | 1865 - 1866 | Canada | British Columbia | Northern British Columbia. | — | 1870542 |
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| Arnica chamissonis Less. | J. T. Rothrock 36 | 1865 - 1866 | Canada | British Columbia | Northern British Columbia. | — | 1870546 |
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| Artemisia rothrockii A.Gray | J. T. Rothrock 298 | 1875 | United States of America | California | isotype | 158564 |
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| Asclepias fascicularis Decne. | J. T. Rothrock 190 | 187 | United States of America | California | — | 3516467 |
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| Asclepias tomentosa Elliott | J. T. Rothrock s.n. | Jul 1874 | United States of America | Arizona | Rocky Canon | — | 3529315 |
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| Asplenium platyneuron (L.) Oakes | J. T. Rothrock 624 | Aug 1879 | United States of America | Maryland | Cecil Co. | — | 3522338 |
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| Astragalus praelongus E.Sheld. var. praelongus | J. T. Rothrock 183 | s.d. | United States of America | New Mexico | — | 01246918 |
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| Atrichum oerstedianum (Müll.Hal.) Mitt. | J. T. Rothrock s.n. | Winter of 1890-91 | — | — | — | 02857524 |
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| Atriplex canescens (Pursh) Nutt. | J. T. Rothrock 112 | Jul 1874 | United States of America | New Mexico | McArthys Ranch | — | 3340031 |
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| Atriplex canescens (Pursh) Nutt. | J. T. Rothrock 126 | Jul 1874 | United States of America | New Mexico | Aqua Azul | — | 3340032 |
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| Axonopus compressus (Sw.) P.Beauv. | J. T. Rothrock 416 | Dec 1890 | Jamaica | Portland | Port Antonio. | — | 1529870 |
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| Ayenia filiformis S.Watson | J. T. Rothrock 569 | 1874 | United States of America | Arizona | Cienega | — | 3874131 |
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| Ayenia filiformis S.Watson | J. T. Rothrock s.n. | s.d. | United States of America | Arizona | Southern Arizona | — | 4026733 |
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| Baccharis salicina Torr. & A.Gray | J. T. Rothrock 771 | 1874 | United States of America | Arizona | Southern Arizona. West of the… | — | 1900107 |
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| Baileya multiradiata Harv. & A.Gray | J. T. Rothrock 495 | 1874 | United States of America | Arizona | Camp Bowie | — | 1923248 |
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| Baileya multiradiata Harv. & A.Gray | J. T. Rothrock 97 | Jun 1874 | United States of America | New Mexico | Rio Arriba | — | 1923385 |
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| Berberis fendleri A.Gray | J. T. Rothrock 54 | Jun 1874 | United States of America | New Mexico | Santa Fe Co. | — | 3830464 |
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| Berlandiera lyrata Benth. | J. T. Rothrock 98 | 1874 | United States of America | New Mexico | — | 1924619 |
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| Betula kenaica W.H.Evans | J. T. Rothrock 64 | 1865-66 | Canada | British Columbia | — | 2476127 |
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| Bidens ferulifolia (Jacq.) DC. | J. T. Rothrock 671 | 1874 | United States of America | Arizona | Sanoita Valley | — | 1909446 |
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| Bouteloua aristidoides (Kunth) Griseb. | J. T. Rothrock s.n. | 1874 | United States of America | Arizona | Riley's Well | — | 1642191 |
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| Bouteloua barbata Lag. | J. T. Rothrock 347 | Jul 1874 | United States of America | Arizona | Cottonwood | — | 1642270 |
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| Bouteloua barbata Lag. | J. T. Rothrock 770 | Oct 1874 | United States of America | Arizona | San Carlos (Gila Valley) | — | 1642273 |
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