Displaying 1 - 75 out of 92 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Carlowrightia torreyana Wassh. | J. L. Riddell 2 | s.d. | United States of America | Texas | — |
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| Anoda cristata (L.) Schltdl. | J. L. Riddell 5 | Apr 1849 | United States of America | Texas | — |
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| Croton monanthogynus Michx. | J. L. Riddell 7 | s.d. | United States of America | Texas | — |
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| Solanum rostratum Dunal | J. L. Riddell 8 | s.d. | United States of America | Texas | — |
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| Linosyris texana Torr. & A.Gray | J. L. Riddell 10 | s.d. | United States of America | Texas | — |
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| Hopia obtusa (Kunth) Zuloaga & Morrone | J. L. Riddell 11 | s.d. | United States of America | Texas | — |
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| Zizia aptera (A.Gray) Fernald var. aptera | J. L. Riddell 16 | — | United States of America | — | Red River country | — |
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| Selaginella arenicola subsp. riddellii | J. L. Riddell 16 | s.d. | United States of America | Texas | — |
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| Acleisanthes longiflora A.Gray | J. L. Riddell 19 | s.d. | United States of America | Texas | — |
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| Euphorbia missurica Raf. | J. L. Riddell 22 | s.d. | United States of America | Texas | — |
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| Eriogonum tenellum var. ramosissimum Benth. | J. L. Riddell 23 | — | United States of America | Texas | syntype |
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| Rhus virens Lindh. ex A.Gray subsp. virens | J. L. Riddell 26 | s.d. | — | — | — |
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| Eriogonum multiflorum Benth. | J. L. Riddell 27 | s.d. | United States of America | Texas | — |
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| Acalypha lindheimeri Müll.Arg. | J. L. Riddell 34 | s.d. | United States of America | Texas | — |
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| Eupatorium ageratifolium var. texense Torr. & A.Gray | J. L. Riddell 43 | s.d. | United States of America | Texas | Comanche Co. Sabinas Creek | type |
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| Buddleja racemosa Torr. | J. L. Riddell 48 | 1840 | United States of America | Texas | lectotype |
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| Acalypha rhomboidea Raf. | J. L. Riddell 49 | s.d. | United States of America | Ohio | — |
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| Nyctaginia capitata Choisy | J. L. Riddell 51 | s.d. | United States of America | Texas | — |
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| Hedeoma drummondii subsp. reverchonii | J. L. Riddell 60 | 1840 | United States of America | Texas | — |
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| Hydrolea | J. L. Riddell 61 | s.d. | United States of America | Texas | — |
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| Arabis virginica (L.) Poir. | J. L. Riddell 106 | s.d. | United States of America | — | Red river country | — |
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| Vernonia maxima Small | J. L. Riddell 125 | 1834 | United States of America | Ohio | syntype |
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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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| Dracopis amplexicaulis (Vahl) Cass. | J. L. Riddell 975 | s.d. | United States of America | Louisiana | Orleans Parish. | — |
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| Xyris difformis Chapm. var. difformis | J. L. Riddell 1400 | — | — | — | — |
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| Triphora trianthophoros subsp. trianthophoros | J. L. Riddell 1420 | s.d. | 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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| Gentiana quinqueflora var. occidentalis A.Gray | J. L. Riddell s.n. | s.d. | United States of America | Ohio | Franklin Co. Worthington, O. [Inferred… | possible type |
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| Scutellaria saxatilis Riddell | J. L. Riddell s.n. | — | United States of America | Kentucky | Greenup Co. | isotype |
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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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| Aster oolentangiensis Riddell | J. L. Riddell s.n. | s.d. | United States of America | Ohio | Franklin Co. Worthington, O. [Inferred… | isotype |
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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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| Oplismenus hirtellus subsp. setarius (Lam.) Mez ex Ekman | J. L. Riddell s.n. | s.d. | United States of America | — | Carrolton, La. [New Orleans, Louisiana.] | — |
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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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| Coreopsis tripteris L. | J. L. Riddell s.n. | s.d. | United States of America | Ohio | Franklin Co. | — |
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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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| Populus canadensis Moench | J. L. Riddell s.n. | — | — | — | "Colton Wood" | — |
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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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| Helenium amarum (Raf.) H.Rock | J. L. Riddell s.n. | s.d. | United States of America | Arkansas | — |
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| Gymnosperma glutinosum (Spreng.) Less. | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Seymeria texana (A.Gray) Pennell | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Pellaea ovata (Desv.) Weath. | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Bigelowia nuttallii L.C.Anderson | J. L. Riddell s.n. | — | United States of America | Texas | — |
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| Paronychia lindheimeri Engelm. ex A.Gray | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Serenoa serrulata (Michx.) Hook.f. ex B.D.Jacks. | J. L. Riddell s.n. | — | United States of America | Texas | — |
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| Tillandsia recurvata (L.) L. | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Euphorbia indivisa (Engelm.) Tidestr. | J. L. Riddell s.n. | 1855 | United States of America | Texas | Western Texas | — |
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| Salvia ballotiflora Benth. | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Heterotheca canescens (DC.) Shinners | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Gutierrezia texana var. glutinosa (S.Schauer) M.A.Lane | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Centauridium drummondii Torr. & A.Gray | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Melampodium leucanthum Torr. & A.Gray | J. L. Riddell s.n. | s.d. | United States of America | Texas | type |
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| Melothria coccinea Riddell | J. L. Riddell s.n. | 1840 | United States of America | Texas | possible type |
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| Actinella scaposa var. linearis Nutt. | J. L. Riddell s.n. | s.d. | United States of America | Texas | isotype |
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| Senecio riddellii Torr. & A.Gray | J. L. Riddell s.n. | s.d. | United States of America | Texas | holotype |
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| Muhlenbergia expansa (Poir.) Trin. | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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| Aronia latifolia Riddell | J. L. Riddell s.n. | s.d. | United States of America | Kentucky | type |
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| Bartramia patens Brid. | J. L. Riddell s.n. | s.d. | — | — | Kerguelen Island | — |
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| Bartramia patens Brid. | J. L. Riddell s.n. | s.d. | — | — | Kerguelen Island | — |
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| Bartramia patens Brid. | J. L. Riddell s.n. | s.d. | — | — | Kerguelen Island | — |
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| Hypericum prolificum var. ß L. | J. L. Riddell s.n. | s.d. | United States of America | Ohio | Franklin Co. | possible type |
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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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| Erechtites hieraciifolius (L.) Raf. ex DC. | J. L. Riddell s.n. | s.d. [1800s] | United States of America | Ohio | Franklin Co. Columbus. | — |
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| Clavigera riddellii Torr. & A.Gray | J. L. Riddell s.n. | s.d. | United States of America | Texas | isotype |
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| Acalypha virginica L. | J. L. Riddell s.n. | s.d. | United States of America | Louisiana | — |
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| Sophora speciosa (Scheele) Benth. | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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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 rhomboidea Raf. | J. L. Riddell s.n. | 1834 | United States of America | Ohio | [likely collected in Worthington County,… | — |
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| Aphanostephus riddellii Torr. & A.Gray | J. L. Riddell s.n. | s.d. | United States of America | Texas | isotype |
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| Centaurium beyrichii (Torr. & A.Gray) B.L.Rob. | J. L. Riddell s.n. | s.d. | United States of America | Texas | — |
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