Displaying 226 - 300 out of 312 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Oxypolis rigidior (L.) Raf. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Florida or Ark. | — |
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| Obolaria virginica L. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Gea Alabama + Louisiana | — |
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| Sedum nuttallianum Raf. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Prairies of Red River | — |
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| Mentzelia oligosperma Nutt. | M. C. Leavenworth s.n. | June + July | United States of America | — | Prairies of Red River | — |
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| Alophia drummondii (Graham) R.C.Foster | M. C. Leavenworth s.n. | s.d. | United States of America | — | Texas + Louisiana | — |
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| Vitis aestivalis Michx. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Texas + Louisiana- also in… | — |
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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… | — |
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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 | — |
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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… | — |
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| Physostegia intermedia (Nutt.) Engelm. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Oklahoma | Choctaw Co. | — |
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| Selenia aurea Nutt. | M. C. Leavenworth s.n. | 1832 - 1833 | United States of America | Texas | San Augustine Co. Ayish Bayou… | — |
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| Selenia aurea Nutt. | M. C. Leavenworth s.n. | 1832 - 1833 | United States of America | Texas | San Augustine Co. Ayish Bayou… | — |
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| Selenia aurea Nutt. | M. C. Leavenworth s.n. | 1832 - 1833 | United States of America | Texas | San Augustine Co. Ayish Bayou… | — |
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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 |
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| Erigeron tenuis Torr. & A.Gray | M. C. Leavenworth | — | United States of America | Louisiana | — |
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| Solidago drummondii Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | type |
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| Euthamia leptocephala (Torr. & A.Gray) Greene | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | not a type |
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| Psoralea digitata Nutt. ex Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | — | syntype |
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| Amphianthus pusillus Torr. | M. C. Leavenworth s.n. | s.d. | United States of America | — | holotype |
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| Desmodium laevigatum (Nutt.) DC. | M. C. Leavenworth s.n. | — | United States of America | Florida | — |
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| Sagittaria graminea Michx. | M. C. Leavenworth s.n. | 1838 | United States of America | — | — |
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| Campylocera leptocarpa Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | — | |||||
| Eustachys petraea (Sw.) Desv. | M. C. Leavenworth s.n. | Aug & Sept | United States of America | Florida | — |
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| Solidago amplexicaulis Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | type |
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| Solidago amplexicaulis Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | type |
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| Symphyotrichum praealtum var. subasperum (Lindl.) G.L.Nesom | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | not a type |
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| Coreopsis grandiflora Hogg ex Sweet | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Chrysopsis pilosa Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Chrysopsis pilosa Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Eupatorium parviflorum var. lancifolium Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | probable type |
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| Balduina angustifolia (Pursh) B.L.Rob. | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | East Florida | — |
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| Solidago nitida Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | syntype |
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| Astragalus crassicarpus Nutt. var. crassicarpus | M. C. Leavenworth s.n. | April & May | United States of America | Arkansas | — |
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| Carex leavenworthii Dewey | M. C. Leavenworth s.n. | 1845 | United States of America | Louisiana | holotype | |||||
| Solidago x dispersa Small | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | probable holotype |
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| Aster dumosus var. subulifolius Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | probable syntype |
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| Berlandiera tomentosa Nutt. ex Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | possible type |
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| Solidago petiolaris Aiton | M. C. Leavenworth s.n. | — | United States of America | Florida | — |
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| Paspalum plicatulum Michx. | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Baccharis halimifolia L. | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Boltonia diffusa Elliott | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Cacalia lanceolata Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Cacalia ovata Walter | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Cacalia ovata Walter | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Chrysopsis mariana (L.) Elliott | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Paspalum floridanum Michx. | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Symphyotrichum oolentangiense (Riddell) G.L.Nesom | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Achillea millefolium L. | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | — |
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| Solidago ludoviciana (A.Gray) Small | M. C. Leavenworth s.n. | — | United States of America | Louisiana | — |
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| Coreopsis major Walter | M. C. Leavenworth 154 | s.d. | United States of America | Florida | — |
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| Chrysopsis mariana (L.) Elliott | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | — |
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| Chrysogonum virginianum var. australe (Alexander ex Small) H.E.Ahles | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | — |
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| Chrysopsis latisquamea Pollard | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | — |
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| Carex oxylepis Torr. & Hook. | M. C. Leavenworth s.n. | — | United States of America | Louisiana | — |
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| Solidago leptocephala Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | type |
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| Gratiola tenella Pennell | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | possible type |
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| Solidago canadensis var. scabra Torr. & A.Gray | M. C. Leavenworth s.n. | — | United States of America | Florida | — |
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| Juncus repens Michx. | M. C. Leavenworth s.n. | — | United States of America | Florida | — |
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| Acacia lutea Leavenw. | M. C. Leavenworth s.n. | s.d. | United States of America | Alabama | holotype |
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| Mimosa strigillosa Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | lectotype |
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| Psoralea cryptocarpa Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | syntype |
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| Stellaria macropetala Torr. & A.Gray | M. C. Leavenworth s.n. | — | United States of America | Arkansas | possible type |
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| Desmanthus leptolobus Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | type |
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| Rhynchosia latifolia Nutt. ex Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | type |
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| Astragalus leptocarpus Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | holotype |
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| Haplopappus corymbosus Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | type |
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| Psoralea floribunda Nutt. ex Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | syntype |
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| Rhynchospora nivea Boeckeler | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | possible type |
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| Phyllanthus polygonoides Nutt. ex Spreng. | M. C. Leavenworth | — | United States of America | Arkansas | isotype |
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| Hypericum apocynifolium Small | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | syntype |
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| Dolichos multiflorus Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | type |
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| Dolichos multiflorus Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | type |
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| Psoralea digitata Nutt. ex Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | syntype |
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| Astragalus pachycarpus Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Arkansas | holotype |
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| Atrema americana DC. | M. C. Leavenworth s.n. | — | United States of America | Arkansas | possible type |
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