Displaying 151 - 175 out of 273 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Nassella leucotricha (Trin. & Rupr.) R.W.Pohl | H. W. Houghton 3961 | 31 May 1916 | United States of America | Oklahoma | Choctaw Co. Along r.r. near… | — |
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| Neptunia lutea (Leavenw.) Benth. | H. W. Houghton 3975 | 31 May 1916 | United States of America | Oklahoma | Choctaw Co. Near Ft. Towson | — |
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| Nuphar lutea subsp. advena (Aiton) Kartesz & Gandhi | H. W. Houghton 3997 | 01 Jun 1916 | United States of America | Oklahoma | Choctaw Co. Near Ft. Towson | — |
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| Oenothera laciniata Hill subsp. laciniata | H. W. Houghton 3583 | 26 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Shawneetown | — |
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| Oenothera speciosa Nutt. var. speciosa | H. W. Houghton 3632 | 18 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Onosmodium molle var. occidentale (Mack.) I.M.Johnst. | H. W. Houghton 3784 | 25 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Onosmodium molle var. occidentale (Mack.) I.M.Johnst. | H. W. Houghton 3979 | 31 May 1916 | United States of America | Oklahoma | Choctaw Co. Ft. Towson | — |
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| Packera glabella (Poir.) C.Jeffrey | H. W. Houghton 3733 | 23 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Boss | — |
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| Packera obovata (Muhl. ex Willd.) W.A.Weber & Á.Löve | H. W. Houghton 3617 | 01 Apr 1916 | United States of America | Oklahoma | Johnston Co. near Tishomingo | — |
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| Parietaria pensylvanica Muhl. ex Willd. | H. W. Houghton 3757 | 24 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Passiflora incarnata L. | H. W. Houghton 3795 | 26 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Shawneetown | — |
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| Pellaea atropurpurea (L.) Link | H. W. Houghton 3528 | Apr 1916 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Peltandra virginica (L.) Schott | H. W. Houghton 3996 | 01 Jun 1916 | United States of America | Oklahoma | Choctaw Co. Near Ft. Towson | — |
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| Penstemon cobaea Nutt. var. cobaea | H. W. Houghton 3717 | 21 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Penstemon digitalis Nutt. ex Sims | H. W. Houghton 3623 | 18 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Penstemon laxiflorus Pennell | H. W. Houghton 3629 | 18 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Penstemon tubiflorus Nutt. var. tubiflorus | H. W. Houghton 3889 | 28 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Shawneetown | — |
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| Persicaria maculosa Gray | H. W. Houghton 3881 | 28 May 1916 | United States of America | Oklahoma | McCurtain Co. near Shawneetown | — |
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| Physalis mollis Nutt. | H. W. Houghton 4037 | 05 Jun 1916 | United States of America | Oklahoma | Choctaw Co. Red River bottoms.… | — |
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| Physalis pubescens L. | H. W. Houghton 35721/2 | 15 Apr 1916 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Phytolacca americana L. | H. W. Houghton 3936 | 29 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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| Phytolacca americana L. | H. W. Houghton 3509 | Oct 1915 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Pleopeltis michauxiana (Weath.) Hickey & Sprunt | H. W. Houghton 3531 | Apr 1916 | United States of America | Oklahoma | Johnston Co. Near Tishomingo | — |
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| Poa pratensis L. | H. W. Houghton 3746 | 23 May 1916 | United States of America | Oklahoma | McCurtain Co. Idabel | — |
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| Podophyllum peltatum L. | H. W. Houghton 3653 | 18 May 1916 | United States of America | Oklahoma | McCurtain Co. Near Idabel | — |
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