Displaying 76 - 92 out of 92 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Acleisanthes longiflora A.Gray | J. L. Riddell 19 | s.d. | 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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| Hedeoma drummondii subsp. reverchonii | J. L. Riddell 60 | 1840 | United States of America | Texas | — |
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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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| Sophora speciosa (Scheele) Benth. | J. L. Riddell s.n. | 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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| 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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| 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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| Xyris difformis Chapm. var. difformis | J. L. Riddell 1400 | — | — | — | — |
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| Populus canadensis Moench | J. L. Riddell s.n. | — | — | — | "Colton Wood" | — |
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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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| 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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| Arabis virginica (L.) Poir. | J. L. Riddell 106 | s.d. | United States of America | — | Red river country | — |
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| Rhus virens Lindh. ex A.Gray subsp. virens | J. L. Riddell 26 | s.d. | — | — | — |
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