Displaying 1 - 75 out of 1154 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Acalypha gracilens A.Gray | G. Arsène 11728 | 13 Jul 1920 | United States of America | Louisiana | Vicinity of Covington | — | 3905165 |
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| Acalypha rubroserrata Pax & K.Hoffm. | G. Arsène 1741 | 10 Nov 1908 | Mexico | — | Glancala | syntype | 246048 |
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| Acer negundo var. interior (Britton) Sarg. | G. Arsène 18679 | 16 Jul 1927 | United States of America | New Mexico | Las Vegas. | — | 2486867 |
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| Acer negundo var. interior (Britton) Sarg. | G. Arsène 18703 | 25 May 1927 | United States of America | New Mexico | Las Vegas. | — | 2486863 |
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| Acmella repens var. beccabunga (DC.) R.K.Jansen | G. Arsène 154 | 11 Oct 1906 | Mexico | Puebla | Puebla Mun. City limits of… | — | 358839 |
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| Acmella repens var. beccabunga (DC.) R.K.Jansen | G. Arsène 8140 | 25 Jul 1902 | Mexico | Michoacán | Morelia Mun. Loma del Zapote,… | — | 358809 |
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| Acuan arsenei Britton & Rose | G. Arsène 8455 | 1909 | Mexico | Coahuila | Saltillo Mun. | type fragment | 1751 |
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| Acuan interior Britton & Rose | G. Arsène 2521 | 29 Jul 1909 | Mexico | Michoacán | Loma santa María, vicinity of… | holotype | 1753 |
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| Adiantum andicola Liebm. | G. Arsène 8629 | 08 Aug 1912 | Mexico | Michoacán | Morelia San Miguel | — | 3914754 |
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| Adiantum braunii Mett. | G. Arsène 8477 | 12 Sep 1912 | Mexico | Michoacán | Morelia Mun. Campanario | — | 3915036 |
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| Adiantum poiretii Wikstr. | G. Arsène s.n. | 21 Aug 1910 | Mexico | — | Base du Zapote, pres Morelia. | — | 3919486 |
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| Adiantum pulverulentum L. | G. Arsène s.n. | 1913 | Mexico | — | Publo Viejo. | — | 3919582 |
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| Adiantum pulverulentum L. | G. Arsène s.n. | 1913 | Mexico | — | Publo Viejo. | — | 3919600 |
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| Adiantum tetraphyllum Humb. & Bonpl. ex Willd. | G. Arsène s.n. | 20 Apr 1913 | Puerto Rico | — | Río Piedras | — | 1798190 |
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| Adipera arsenei Britton & Rose | G. Arsène s.n. | 30 Sep 1906 | Mexico | Puebla | Fort Guadalupe. Alt. 2180 m. | isotype | 3398 |
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| Ageratum corymbosum var. jaliscense B.L.Rob. | G. Arsène 2695 | 25 Aug 1909 | Mexico | Michoacán | Monte de Zapote, vicinity of… | — | 359135 |
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| Ageratum corymbosum Zuccagni f. corymbosum | G. Arsène 2678 | 25 Apr 1909 | Mexico | Michoacán | Monte de Zapote, vicinity of… | — | 359208 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | G. Arsène 26882 | 31 Jul 1926 | United States of America | New Mexico | Vicinity of Santa Fe -… | — | 1556082 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | G. Arsène 16406 | 17 Aug 1924 | United States of America | New Mexico | Sandoval Co. Vicinity of Sulphur… | — | 1556081 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | G. Arsène 17141 | 03 Jul 1926 | United States of America | New Mexico | Sandoval Co. Vicinity of Santa… | — | 1555984 |
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| Agrostis stolonifera L. | G. Arsène 18260 | 06 Aug 1926 | United States of America | New Mexico | Vicinity of Las Vegas. 4… | — | 1533009 |
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| Amblystegium varium (Hedw.) Lindb. | G. Arsène 14810 | 01 Mar 1924 | United States of America | Louisiana | Vicinity of Covington. | — | 567737 | ||
| Amblystegium varium (Hedw.) Lindb. | G. Arsène 5000 | 4/12/1907 | Mexico | Puebla | Río San Francisco, vicinity of… | — | 901026 | ||
| Amblystegium varium var. arsenei Thér. | G. Arsène s.n. | Mar 1907 | Mexico | Puebla | Rio San Francisco | possible syntype | 901051 |
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| Amblystegium varium var. arsenei Thér. | G. Arsène 5004 | 4/12/1907 | Mexico | Puebla | Valleé de Mexico; vicinity of… | isolectotype | 901055 |
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| Ambrosia artemisiifolia L. | G. Arsène 6210 | Apr 1911 | Mexico | Nuevo León | Monterrey Mun. Monterrey, NL. | — | 359704 |
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| Ambrosia psilostachya DC. | G. Arsène 8322 | 8 Jan 1912 | Mexico | Michoacán | Morelia Mun. Morelia | — | 359908 |
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| Amicia zygomeris DC. | G. Arsène 9931 | 15 Aug 1909 | Mexico | Michoacán | Morelia, Loma Santa Maria. | — | 01912725 |
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| Amorpha canescens Pursh | G. Arsène 21036 | 20 Aug 1927 | United States of America | New Mexico | Las Vegas, Cañon S. | — | 01492742 |
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| Anacolia campylopus (Schimp.) Fransén | G. Arsène 5076 | 15 Sep 1910 | Mexico | Michoacán | Morelia Mun. Cerro San Miguel;… | — | 599348 |
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| Anacolia campylopus (Schimp.) Fransén | G. Arsène 4873 | 1910 | Mexico | Michoacán | Morelia Mun. Cerro San Miguel;… | — | 599349 |
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| Anacolia campylopus (Schimp.) Fransén | G. Arsène 5076 | 15 Sep 1910 | Mexico | Michoacán | Morelia Mun. Cerro San Miguel,… | — | 599362 |
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| Anacolia intertexta (Besch.) Paris | G. Arsène 4976 | 10/3/1910 | Mexico | Michoacán | Morelia Mun. Cerro Azul; vicinity… | — | 599343 |
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| Anacolia intertexta (Besch.) Paris | G. Arsène 7563 | Nov 1911 | Mexico | Michoacán | Morelia Mun. Campanario; vicinity of… | — | 599347 |
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| Anacolia intertexta (Besch.) Paris | G. Arsène 7563 | Nov 1911 | Mexico | Michoacán | Morelia Mun. Campanario; vicinity of… | — | 599351 |
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| Anacolia intertexta (Besch.) Paris | G. Arsène 7563 | Nov 1911 | Mexico | Michoacán | Morelia Mun. Campanario; vicinity of… | — | 599364 |
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| Anacolia intertexta (Besch.) Paris | G. Arsène 7563 | Nov 1911 | Mexico | Michoacán | Morelia Mun. Campanario; vicinity of… | — | 599365 |
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| Andropogon | G. Arsène 5465 | 15 Sep 1910 | Mexico | Puebla | vicinity of Puebla; Sta Barbara | — | 1640570 |
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| Andropogon | G. Arsène 274 | 20 Sep 1906 | Mexico | Puebla | vicinity of Puebla; Laguna San… | — | 1640574 |
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| Andropogon gerardii Vitman | G. Arsène 2469 | 15 Oct 1909 | Mexico | Michoacán | Vicinity of Morelia; Lomas de… | — | 1640530 |
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| Andropogon glomeratus (Walter) Britton, Sterns & Poggenb. | G. Arsène 1433 | 18 Jul 1907 | Mexico | Puebla | Vicinity of Puebla; Mayorazgo sar… | — | 1640544 |
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| Andropogon ternarius Michx. | G. Arsène 11152 | 10 Feb 1919 | United States of America | Louisiana | Arlington | — | 1362760 |
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| Angelica venenosa (J.Greenway) Fernald | G. Arsène 702 | 03 Aug 1916 | United States of America | Maryland | Ellicott City | — | 3366294 |
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| Anoectangium aestivum (Hedw.) Mitt. | G. Arsène 4800 | 18 Nov 1907 | Mexico | Puebla | Esperanza; vicinity of Puebla | — | 597611 |
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| Anoectangium aestivum (Hedw.) Mitt. | G. Arsène 4770 | 5/11/1907 | Mexico | Puebla | Hacienda Alamos | — | 597625 |
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| Anoectangium aestivum (Hedw.) Mitt. | G. Arsène 4743 | 18 Nov 1907 | Mexico | — | Esperango near Puebla | — | 598050 |
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| Anoectangium aestivum (Hedw.) Mitt. | G. Arsène 4770 | 05 Nov 1907 | Mexico | Puebla | Puebla Mun. Hacienda Alamos, vicinity… | — | 597627 |
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| Anoectangium aestivum (Hedw.) Mitt. | G. Arsène 7965 | Sep 1912 | Mexico | Michoacán | Morelia Mun. Jesus del Monte. | — | 597633 |
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| Anomobryum julaceum (G.Gaertn., B.Mey. & Scherb.) Schimp. | G. Arsène 4636 | 10 Dec 1907 | Mexico | Puebla | Hacienda Alamos, vicinity of Puebla | — | 598752 |
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| Anomodon attenuatus (Hedw.) Hübener | G. Arsène 14659 | 21 Dec 1922 | United States of America | Louisiana | St. Benedict | — | 509821 | ||
| Anomodon attenuatus (Hedw.) Hübener | G. Arsène 14828 | 03 Jul 1924 | United States of America | Louisiana | Vicinity of Covington | — | 509820 | ||
| Anomodon attenuatus (Hedw.) Hübener | G. Arsène 14995 | Aug 1924 | United States of America | Louisiana | Grand Coteau, St. Landry Parish | — | 509822 | ||
| Anomodon rostratus (Hedw.) Schimp. | G. Arsène 14611 | 10 Feb 1920 | United States of America | Louisiana | Vicinity of Covington | — | 513902 | ||
| Anomodon rostratus (Hedw.) Schimp. | G. Arsène 14617 | 10 Feb 1920 | United States of America | Louisiana | Vicinity of Covington | — | 513901 | ||
| Antennaria | G. Arsène 20187 | 25 May 1928 | United States of America | New Mexico | San Miguel Co. Thunderbird Ranch | — | 2875950 |
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| Anthoceros communis Steph. | G. Arsène s.n. | Nov 1906 | Mexico | Puebla | Puebla Mun. Puebla. | — | 613151 |
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| Anticlea elegans (Pursh) Rydb. | G. Arsène 16250 | 12 Aug 1926 | United States of America | New Mexico | Santa Fe Co. Vicinity of… | — | 3688448 |
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| Aphanostephus DC. | G. Arsène 6204 | Jul 1911 | Mexico | Nuevo León | Monterrey Mun. Monterrey, NL. | — | 360043 |
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| Aphanostephus ramosissimus DC. var. ramosissimus | G. Arsène 6204 | Jul 1911 | Mexico | Nuevo León | Ciénega de Flores Mun. San… | — | 360025 |
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| Apometzgeria pubescens (Schrank) Kuwah. | G. Arsène 22678 | 04 Jul 1936 | United States of America | New Mexico | Vic. Las Vegas: Upper Gallinas… | — | 421074 | ||
| Arbutus xalapensis (Benth.) Kunth | G. Arsène 5354 | Dec 1910 | Mexico | Michoacán | Morelia Mun. Cauepauario | — | 1875056 |
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| Archibaccharis serratifolia (Kunth) S.F.Blake | G. Arsène 2090 | 5 Nov 1907 | Mexico | Puebla | Puebla Mun. Hacienda Alamos, vicinity… | — | 360318 | ||
| Argyrochosma incana Windham | G. Arsène s.n. | 14 Nov 1907 | Mexico | Tlaxcala | Santa Ana Chiautempan | — | 3902001 |
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| Aristida | G. Arsène 8877 | 16 Oct 1913 | Mexico | — | Mixcoac; lona Cacapula | — | 1559134 |
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| Aristida | G. Arsène 8877 | 16 Oct 1913 | Mexico | — | Mixcoac; lona Cacapula | — | 1559137 |
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| Aristida | G. Arsène 2922 | 15 Aug 1909 | Mexico | Michoacán | Vicinity of Morelia. Loma Sta.… | — | 1559129 |
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| Aristida | G. Arsène 5872 | 04 Sep 1910 | Mexico | Michoacán | Vicinity of Morelia. Loma Sta.… | — | 1559128 |
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| Aristida | G. Arsène 2972 | 26 Aug 1909 | Mexico | Michoacán | Vicinity of Morelia. Loma Sta.… | — | 1559130 |
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| Aristida | G. Arsène 8874 | 16 Oct 1913 | Mexico | Ciudad de México | Mixcoac; lona Cacapula | — | 1559133 |
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| Aristida | G. Arsène 5890 | 25 Aug 1910 | Mexico | Michoacán | Vicinity of Morelia, Sud da… | — | 1559131 |
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| Aristida | G. Arsène 2629 | 15 Oct 1909 | Mexico | Michoacán | Morelia Mun. Vicinity of Morelia;… | — | 1559132 |
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| Aristida adscensionis L. | G. Arsène s.n. | 10 Oct 1909 | Mexico | — | Cour de la frison, á… | — | 1633352 |
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| Aristida purpurea var. longiseta (Steud.) Vasey | G. Arsène 21028 | 20 Aug 1927 | United States of America | New Mexico | San Miguel Co. | — | 1632350 |
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| Artemisia bigelovii A.Gray | G. Arsène 15520 | 07 Jul 1926 | United States of America | New Mexico | Santa Fe Co. La Bajada | — | 1892628 |
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| Artemisia bigelovii A.Gray | G. Arsène 15520 | 07 Jul 1926 | United States of America | New Mexico | Santa Fe Co. La Bajada | — | 1892642 |
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