Displaying 1 - 25 out of 273 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Acalypha virginica L. | H. W. Houghton 3339 | Oct 1915 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Aesculus glabra var. arguta (Buckley) B.L.Rob. | H. W. Houghton 3941 | 29 May 1916 | United States of America | Oklahoma | McCurtain Co. Little River | — |
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| Ammannia coccinea Rottb. | H. W. Houghton 4044 | 05 Jun 1916 | United States of America | Oklahoma | Choctaw Co. Red River bottoms,… | — |
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| Ampelopsis arborea (L.) Koehne | H. W. Houghton 3723 | 22 May 1916 | United States of America | Oklahoma | McCurtain Co. Red River bottoms.… | — |
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| Ampelopsis cordata Michx. | H. W. Houghton 3779 | 25 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Ampelopsis cordata Michx. | H. W. Houghton 3778 | 25 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Antennaria parlinii subsp. fallax (Greene) R.J.Bayer & Stebbins | H. W. Houghton 3609 | 08 Apr 1916 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Antennaria parlinii subsp. fallax (Greene) R.J.Bayer & Stebbins | H. W. Houghton 3610 | 08 Apr 1916 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Anthemis cotula L. | H. W. Houghton 3621 | 18 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Argythamnia candicans Sw. | H. W. Houghton 1236 | 25 Aug 1989 | Puerto Rico | Loíza | Near Rd. 187 at Piñones. | — |
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| Argythamnia mercurialina (Nutt.) Müll.Arg. | H. W. Houghton 4001 | 02 Jun 1916 | United States of America | Oklahoma | Choctaw Co. Near Grant | — |
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| Arisaema dracontium (L.) Schott | H. W. Houghton 4055 | 05 Jun 1916 | United States of America | Oklahoma | Choctaw Co. Near Grant | — |
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| Artemisia ludoviciana subsp. mexicana (Willd. ex Spreng.) D.D.Keck | H. W. Houghton 3341 | Oct 1915 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Asclepias purpurascens L. | H. W. Houghton 3677 | 19 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Asclepias tuberosa var. interior (Woodson) Shinners | H. W. Houghton 3812 | 26 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Shawneetown | — |
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| Asclepias variegata L. | H. W. Houghton 3822 | 26 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Shawneetown | — |
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| Ascyrum hypericoides var. multicaule (Willd. ex Michx.) Fernald | H. W. Houghton 3519 | Oct 1915 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Asplenium platyneuron (L.) Oakes | H. W. Houghton 3912 | 29 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Asplenium resiliens Kunze | H. W. Houghton 3530 | Apr 1916 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Astragalus distortus Torr. & A.Gray var. distortus | H. W. Houghton 3602 | 08 Apr 1916 | United States of America | Oklahoma | Johnston Co. Near Fishormings | — |
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| Athyrium filix-femina subsp. angustum R.T.Clausen | H. W. Houghton 3907 | 29 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Baptisia leucophaea Nutt. | H. W. Houghton 3603 | 08 Apr 1916 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Baptisia nuttalliana Small | H. W. Houghton 3800 | 26 May 1916 | United States of America | Oklahoma | McCurtain Co. near Shawneetown | — |
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| Berchemia scandens (Hill) K.Koch | H. W. Houghton 3684 | 20 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Berlandiera texana DC. | H. W. Houghton 3892 | 28 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Shawneetown | — |
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