Displaying 1 - 50 out of 312 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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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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| Vesicaria nuttallii Torr. & A.Gray | M. C. Leavenworth s.n. | — | United States of America | — | Praries of Red River | isolectotype | 185839 |
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| Rhynchosia torreyi Vail | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | Sand hills | holotype | 26923 |
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| Halea ludoviciana Torr. & A.Gray | M. C. Leavenworth s.n. | 06 Jun 1837 | United States of America | Louisiana | Western Louisiana | syntype | 178891 |
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| Grossularia texensis Coville & A.Berger | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | Near St. Augustine | isotype | 185886 |
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| Baptisia sphaerocarpa Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Vicinity of Fort Towson. | — | 6170 |
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| Melothria grandifolia Torr. & A.Gray | M. C. Leavenworth s.n. | — | United States of America | — | Bottom of the Mississippi | possible type | 172478 |
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| Chaetanthera asteroides Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Arkansas | — | 163309 | ||
| Carex flaccosperma Dewey | M. C. Leavenworth s.n. | 1845 | United States of America | — | Camp Sabine | probable isotype | 39366 |
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| Vicia ludoviciana Nutt. ex Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | Nacogdoches Co. "Near Nagadoches" | lectotype | 50651 |
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| Phacelia glabra Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Louisiana & Georgia | — | 83930 |
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| Chapmannia floridana Torr. & A.Gray | M. C. Leavenworth s.n. | May 1836 | United States of America | Florida | Ft. King | type | 6401 |
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| Asclepias feayi Chapm. ex A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Tampa Bay | type | 4648 |
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| Penstemon tubiflorus Nutt. var. tubiflorus | M. C. Leavenworth s.n. | May and June | United States of America | — | Vicinity Fort Towson | — | 663249 |
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| Rudbeckia alismifolia Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | "Louisiana & Texas" | syntype | 232822 |
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| Lepidanthus obovatus Nutt. | M. C. Leavenworth | May | United States of America | — | Arkasas Territory: Fort Towson | isotype | 263531 |
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| Sophora tomentosa var. truncata Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Tampa Bay | lectotype | 26995 |
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| Sophora tomentosa var. truncata Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Tampa Bay | isotype | 26996 |
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| Coreopsis leavenworthii Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Near Fort Drane, eastern Florida | syntype | 167697 |
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| Coreopsis leavenworthii Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Eastern Florida | possible syntype | 167698 |
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| Vincetoxicum floridanum Vail | M. C. Leavenworth | — | United States of America | Florida | East Florida | lectotype | 318829 |
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| Draba cuneifolia Nutt. | M. C. Leavenworth s.n. | — | United States of America | Oklahoma | Choctaw Co. | isosyntype | 185278 |
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| Dodecatheon meadia var. brachycarpum (Small) Fassett | M. C. Leavenworth s.n. | s.d. | United States of America | — | Red River prairies | — | 329425 |
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| Aster phyllolepis Torr. & A.Gray | M. C. Leavenworth IIs.n. | s.d. | United States of America | — | Arkansas ? [Protologue mentioned western… | syntype | 161981 |
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| Vesicaria grandiflora var. pallida Torr. & A.Gray | M. C. Leavenworth s.n. | — | United States of America | Texas | Near St. Augustine | holotype | 185835 |
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| Sophora affinis Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | Red River | lectotype | 26983 |
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| Leptopoda fimbriata Torr. & A.Gray | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | E. Florida | — | 180539 |
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| Astragalus distortus var. engelmannii (E.Sheld.) M.E.Jones | M. C. Leavenworth s.n. | s.d. | United States of America | Texas | Nacogdoches Co. Near Nacogdoches | — | 01248617 |
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| Dalea aurea Nutt. ex Pursh | M. C. Leavenworth s.n. | s.d. | United States of America | — | Arkansas [possibly referring to the… | — | 01073445 |
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| Bouteloua rigidiseta (Steud.) Hitchc. | M. C. Leavenworth s.n. | 1837 | United States of America | — | Arkansas or Texas. | — | 1644246 |
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| Heteropogon melanocarpus (Elliott) Benth. | M. C. Leavenworth s.n. | Sep 1838 | United States of America | Florida | Fort King. | — | 1727821 |
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| Muhlenbergia capillaris (Lam.) Trin. | M. C. Leavenworth s.n. | s.d. | United States of America | — | E. Florida. | — | 1755749 |
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| Phalaris angusta Nees ex Trin. | M. C. Leavenworth s.n. | 1835? | United States of America | Louisiana | Swamps around New Orleans. | — | 1744611 |
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| Spartina pectinata Bosc ex Link | M. C. Leavenworth s.n. | s.d. | United States of America | Illinois | Prairies. | — | 1787167 |
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| Symphyotrichum concolor (L.) G.L.Nesom | M. C. Leavenworth s.n. | s.d. | United States of America | — | Florida. | — | 1826907 |
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| Acmella repens (Walter) Rich. | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | E. Florida | — | 1866764 |
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| Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb. | M. C. Leavenworth s.n. | s.d. | United States of America | Louisiana | Near Camp Sabine. | — | 1869538 |
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| Astranthium integrifolium (Michx.) Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | — | Texas & Louisiana. | — | 1898977 |
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| Carphephorus paniculatus (J.F.Gmel.) H.J.-C.Hebert | M. C. Leavenworth s.n. | Sep - Oct | United States of America | Florida | Flat pine barrens. | — | 2031174 |
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| Chaetopappa asteroides (Nutt.) DC. | M. C. Leavenworth s.n. | s.d. | United States of America | Oklahoma | Choctaw Co. Prairies; Fort Towson. | — | 2035161 |
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| Chrysopsis graminifolia (Michx.) Nutt. var. graminifolia | M. C. Leavenworth s.n. | s.d. | United States of America | — | Southern states. | — | 2037182 |
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| Chrysopsis pilosa Nutt. | M. C. Leavenworth s.n. | s.d. | United States of America | Oklahoma | Choctaw Co. Fort Towson. | — | 2037939 |
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| Coreopsis tinctoria Nutt. | M. C. Leavenworth s.n. | — | United States of America | — | Red River prairies | — | 2066808 |
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| Chara compressa Kunth | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Tampa Bay | — | 02012063 |
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| Epidendrum tampense Lindl. | M. C. Leavenworth s.n. | s.d. | United States of America | Florida | Tampa Bay. | — | 4070929 |
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| Carex comosa Boott | M. C. Leavenworth s.n. | — | United States of America | Florida | E. Florida. | — | 2259778 |
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| Carex complanata Torr. & Hook. | M. C. Leavenworth s.n. | — | United States of America | — | Louisiana and Texas. | — | 2259862 |
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| Carex debilis Michx. | M. C. Leavenworth s.n. | — | United States of America | Louisiana | [No loc.] | — | 2262154 |
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| Carex godfreyi Naczi | M. C. Leavenworth s.n. | 1839 | United States of America | — | Tampa Bay. | — | 2277925 |
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| Carex macropoda (Fernald) Mohlenbr. | M. C. Leavenworth s.n. | — | United States of America | Louisiana | Louisiana and Texas. | — | 2290195 |
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