Displaying 251 - 310 out of 310 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Thelesperma filifolium (Hook.) A.Gray var. filifolium | M. C. Leavenworth s.n. | May-Jun-Jul | United States of America | Texas | Red River Prairies | — | 167694 |
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| Polygonella americana (Fisch. & C.A.Mey.) Small | M. C. Leavenworth s.n. | Sept. | United States of America | Texas | Sand hills | — | 3140148 |
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| Amaranthus australis (A.Gray) J.D.Sauer | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | Guadaloupe River | — | 3363282 |
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| Prunus angustifolia Marshall | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | — | 1287881 |
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| Leavenworthia aurea Torr. | M. C. Leavenworth s.n. | — | United States of America | Texas | [And Arkansas ?, added in… | type | 185423 |
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| Lithospermum incisum Lehm. | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | — | 3244021 |
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| Gossypianthus lanuginosus var. tenuiflorus (Hook.) Henrickson | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | near the Sabine River | — | 3369789 |
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| Astragalus distortus var. engelmannii (E.Sheld.) M.E.Jones | M. C. Leavenworth s.n. | May 1837 | United States of America | Texas | Red Lands of Texas | — | 01248620 |
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| Cirsium muticum Michx. | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | Canadian River. Fort Smith to… | — | 2052310 |
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| Mirabilis albida (Walter) Heimerl | M. C. Leavenworth s.n. | May | United States of America | Texas | Red lands | — | 3375778 |
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| Calopogon multiflorus Lindl. | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Tampa Bay | — | 4012898 |
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| Mimosa strigillosa Torr. & A.Gray | M. C. Leavenworth s.n. | 1839 | United States of America | Florida | Hillsborough Co. Tampa Bay | syntype | 2508 |
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| Ampelaster carolinianus (Walter) G.L.Nesom | M. C. Leavenworth s.n. | 1839 | United States of America | Florida | Hillsborough Co. Tampa Bay | — | 1884571 |
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| Eragrostis ciliaris (L.) R.Br. | M. C. Leavenworth s.n. | 1839 | United States of America | Florida | Hillsborough Co. Tampa Bay | — | 01884906 |
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| Bidens leucantha Willd. | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Hillsborough Co. Tampa Bay | — | 1910344 |
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| Amorpha herbacea var. floridana (Rydb.) Wilbur | M. C. Leavenworth s.n. | — | United States of America | Florida | Hillsborough Co. Tampa Bay, Sea… | — | 2559799 |
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| Chrysopsis hyssopifolia Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Hillsborough Co. Tampa Bay. | — | 2037466 |
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| Lupinus diffusus Nutt. | M. C. Leavenworth s.n. | — | United States of America | Florida | Hillsborough Co. Tampa Bay. | — | 2597891 |
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| Dryopteris ludoviciana (Kunze) Small | M. C. Leavenworth s.n. | 1839 | United States of America | Florida | Tampa Bay | — | 3552138 |
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| Thevetia peruviana var. pinifolia Standl. & Steyerm. | M. C. Leavenworth 505 | 07 Aug 1940 | Mexico | Michoacán | Apatzingán Mun. Trail from Apatzingan… | isotype | 318420 |
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| Muhlenbergia | M. C. Leavenworth s.n. | 1840 | United States of America | Florida | St. Marks | — | 1760023 |
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| Baccharis halimifolia L. | M. C. Leavenworth s.n. | 1848 | United States of America | Florida | St. Marks | — | 1899549 |
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| Fraxinus caroliniana Mill. | M. C. Leavenworth s.n. | — | United States of America | Florida | — | 2500384 |
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| Pharus lappulaceus Aubl. | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Orange Hammock, near Orange Lake. | — | 1763155 |
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| Gratiola pusilla Torr. ex Benth. | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | Prairies near the Sabine River. | isotype | 00068485 |
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| Gratiola pusilla Torr. ex Benth. | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | possible type | 00743751 |
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| Valerianella radiata var. fernaldii Dyal | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | — | 4233319 |
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| Hedyotis boscii DC. | M. C. Leavenworth s.n. | Aug-Sept. | United States of America | Texas | on the banks of the… | — | 04266570 |
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| Eriogonum multiflorum Benth. | M. C. Leavenworth s.n. | s.d. | United States of America | Oklahoma | prairies for 111 miles from… | — | 04266916 |
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| Acacia lutea Leavenw. | M. C. Leavenworth s.n. | s.d. | United States of America | Alabama | holotype | 1439 |
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| Cyperus halei Torr. ex Britton | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | East Florida | syntype | 11666 |
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| Pistia stratiotes L. | M. C. Leavenworth s.n. | s.d. | — | — | Ashley Barony | — | 02373234 |
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| Carex oxylepis Torr. & Hook. | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | not a type | 1477565 | |||
| Portulaca pilosa L. | M. C. Leavenworth 1 | s.d. | United States of America | Arkansas | — | 3582902 |
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| Desmodium marilandicum (L.) DC. | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | — | 2567039 |
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| Lespedeza capitata Michx. x L. virginica (L.) Britton | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | — | 2575865 |
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| Elephantopus carolinianus Raeusch. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Louisiana + Texas | — | 2073810 |
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| Anemone caroliniana Walter | M. C. Leavenworth s.n. | s.d. | United States of America | — | Ark. + La. | — | 2738765 |
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| Clematis crispa L. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Sabine Bottoms | — | 2744761 |
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| Physostegia digitalis Small | M. C. Leavenworth s.n. | s.d. | United States of America | — | Near Jefferson Barracks | — | 3067149 |
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| Warea cuneifolia (Muhl. ex Nutt.) Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Sand Hills, Augusta | — | 3130596 |
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| Oenothera triloba Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Red River | — | 3361746 |
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| Oxypolis rigidior (L.) Raf. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Florida or Ark. | — | 3497759 |
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| Obolaria virginica L. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Gea Alabama + Louisiana | — | 3582023 |
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| Sedum nuttallianum Raf. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Prairies of Red River | — | 3563953 |
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| Mentzelia oligosperma Nutt. | M. C. Leavenworth s.n. | June + July | United States of America | — | Prairies of Red River | — | 3600727 |
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| Alophia drummondii (Graham) R.C.Foster | M. C. Leavenworth s.n. | s.d. | United States of America | — | Texas + Louisiana | — | 3801817 |
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| Vitis aestivalis Michx. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Texas + Louisiana- also in… | — | 3841773 |
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| Ranunculus laxicaulis Darby | M. C. Leavenworth s.n. | Apr 1837 - May 1837 | United States of America | — | it may be near Sabine… | — | 2789013 |
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| Pediomelum hypogaeum var. subulatum (A.Gray) J.W.Grimes | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | Nacogdoches Co. Near Nagadoches | — | 2620859 |
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| Desmanthus illinoensis (Michx.) MacMill. ex B.L.Rob. & Fernald | M. C. Leavenworth s.n. | June-July | United States of America | Oklahoma | Choctaw Co. from Fort Towson… | — | 2717289 |
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| Physostegia intermedia (Nutt.) Engelm. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Oklahoma | Choctaw Co. | — | 3067184 |
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| Isolepis molesta (M.C.Johnst.) S.G.Sm. | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | — | 329547 |
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| Selenia aurea Nutt. | M. C. Leavenworth s.n. | 1832 - 1833 | United States of America | Texas | San Augustine Co. Ayish Bayou… | — | 1477275 |
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| Selenia aurea Nutt. | M. C. Leavenworth s.n. | 1832 - 1833 | United States of America | Texas | San Augustine Co. Ayish Bayou… | — | 1477274 |
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| Selenia aurea Nutt. | M. C. Leavenworth s.n. | 1832 - 1833 | United States of America | Texas | San Augustine Co. Ayish Bayou… | — | 1477276 |
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| Mentzelia floridana Nutt. ex Torr. & A.Gray | M. C. Leavenworth s.n. | 1839 | United States of America | Florida | Hillsborough Co. Tampa Bay. | type | 112200 |
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| Psoralea digitata Nutt. ex Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | — | syntype | 26772 |
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| Amphianthus pusillus Torr. | M. C. Leavenworth s.n. | s.d. | United States of America | — | holotype | 67822 |
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| Sagittaria graminea Michx. | M. C. Leavenworth s.n. | 1838 | United States of America | — | — | 3729049 |
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