Displaying 1 - 25 out of 92 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Helenium amarum (Raf.) H.Rock | J. L. Riddell s.n. | s.d. | United States of America | Arkansas | — |
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| Chamaesyce deltoidea (Engelm. ex Chapm.) Small var. deltoidea | J. L. Riddell | — | United States of America | Florida | Monroe Co. | — |
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| Scutellaria saxatilis Riddell | J. L. Riddell s.n. | — | United States of America | Kentucky | Greenup Co. | isotype |
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| Aronia latifolia Riddell | J. L. Riddell s.n. | s.d. | United States of America | Kentucky | type |
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| Iva caudata Small | J. L. Riddell s.n. | Nov 1838 | United States of America | Louisiana | Near New Orleans | syntype |
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| Lonicera japonica Thunb. | J. L. Riddell | — | United States of America | Louisiana | Orleans Parish. | — |
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| Eragrostis reptans (Michx.) Nees | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | New Orleans | — |
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| Dalea purpurea Vent. var. purpurea | J. L. Riddell 374 | s.d. | United States of America | Louisiana | Near Jackson [Feliciana Parish, i.… | — |
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| Urochloa reptans (L.) Stapf | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | New Orl. [New Orleans]. | — |
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| Baccharis halimifolia L. | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | Orleans Parish. | — |
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| Chromolaena ivifolia (L.) R.M.King & H.Rob. | J. L. Riddell s.n. | Nov 1838 | United States of America | Louisiana | Old field about New Orl.… | — |
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| Conyza ramosissima Cronquist | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | Orleans Parish. | — |
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| Dracopis amplexicaulis (Vahl) Cass. | J. L. Riddell 975 | s.d. | United States of America | Louisiana | Orleans Parish. | — |
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| Carex crus-corvi Shuttlew. ex Kuntze | J. L. Riddell s.n. | — | United States of America | Louisiana | Orleans Parish. | — |
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| Thelypteris normalis (C.Chr.) Moxley | J. L. Riddell s.n. | 1838 | United States of America | Louisiana | Swamp about New Orleans | — |
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| Thelypteris normalis (C.Chr.) Moxley | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | New Orleans | — |
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| Riddellia antiphylla Rafarin | J. L. Riddell s.n. | — | United States of America | Louisiana | Orleans Parish. | lectotype |
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| Riddellia antiphylla Rafarin | J. L. Riddell s.n. | Nov 1838 | United States of America | Louisiana | Orleans Parish. | probable isotype |
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| Acalypha virginica L. | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | — |
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| Acalypha ostryifolia Riddell ex J.M.Coult. | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | Orleans Parish. New Orleans | type |
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| Acalypha gracilens A.Gray | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | — |
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| Bumelia lucida W.Small | J. L. Riddell | — | United States of America | Louisiana | probable syntype |
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| Riddellia antiphylla Rafarin | J. L. Riddell s.n. | — | United States of America | Louisiana | probable isotype |
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| Celtis mississippiensis Bosc | J. L. Riddell s.n. | — | United States of America | Louisiana | — |
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| Paspalum repens P.J. Bergius | J. L. Riddell 1570 | s.d. | United States of America | Louisiana | — |
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