Displaying 1926 - 1975 out of 1985 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Bebbia juncea var. aspera Greene | D. T. MacDougal 123 | 4 Apr 1905 | Mexico | Baja California | Mexicali Mun. Cucapa Mts., B.C. | — |
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| Prosopis glandulosa var. torreyana (L.D.Benson) M.C.Johnst. | D. T. MacDougal s.n. | 1 Apr 1905 | Mexico | Baja California Sur | — | |||||
| Ambrosia dumosa (A.Gray) W.W.Payne | D. T. MacDougal s.n. | 31 Jan 1904 | Mexico | Sonora | Mesa near la Grulla | — |
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| Bebbia juncea var. aspera Greene | D. T. MacDougal 9 | 14 Nov 1921 | Mexico | Sonora | 14 mi W of Ceruar… | — |
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| Riccia frostii Austin | D. T. MacDougal s.n. | Feb 1904 | Mexico | Baja California | — |
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| Wilcoxia sykesii | D. T. MacDougal s.n. | 1923 | Mexico | Sonora | possible type |
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| Ostrya knowltonii Coville | D. T. MacDougal 193 | 28 Jun 1898 | United States of America | Colorado | — |
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| Erechtites hieraciifolius (L.) Raf. ex DC. | D. T. MacDougal 20938 | 1989 | United States of America | Indiana | — |
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| Polypodium hesperium Maxon | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Aspidotis densa (P.Brack) Lellinger | D. T. MacDougal s.n. | Jul 1892 | United States of America | Idaho | — |
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| Dryopteris filix-mas (L.) Schott | D. T. MacDougal s.n. | 1892 | United States of America | Idaho | — |
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| Woodsia oregana D.C. Eaton | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Adiantum capillus-veneris L. | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Pellaea wrightiana Hook. | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Myriopteris gracilis Fée | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Pellaea truncata Goodd. | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Cystopteris utahensis Windham & Haufler | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Woodsia mexicana Fée | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Asplenium trichomanes L. | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Pellaea glabella var. simplex Butters | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Asplenium septentrionale (L.) Hoffm. | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Dryopteris filix-mas (L.) Schott | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Dryopteris filix-mas (L.) Schott | D. T. MacDougal s.n. | Aug 1892 | United States of America | Idaho | — |
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| Dryopteris filix-mas (L.) Schott | D. T. MacDougal s.n. | 1892 | United States of America | Idaho | — |
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| Cystopteris fragilis (L.) Bernh. | D. T. MacDougal s.n. | Jul 1892 | United States of America | Idaho | — |
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| Verbena ciliata var. pubera (Greene) L.M.Perry | D. T. MacDougal s.n. | 1891 | United States of America | Arizona | — |
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| Monotropa uniflora L. | D. T. MacDougal 129 | 24 Jul 1900 | United States of America | Idaho | Priest River Valley. | — |
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| Linanthus pungens (Torr.) J.M.Porter & L.A.Johnson | D. T. MacDougal 183 | 28 Jun 1898 | United States of America | Arizona | About Grand Canon of the… | — |
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| Linanthus pungens (Torr.) J.M.Porter & L.A.Johnson | D. T. MacDougal 183 | 28 Jun 1898 | United States of America | Arizona | About Grand Canon of the… | — |
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| Lotus stipularis var. stipularis | D. T. MacDougal 116 | 04 Apr 1905 | Mexico | Baja California | Cucopa [Cucapah?] Mts | — |
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| Psorothamnus emoryi var. emoryi | D. T. MacDougal 81 | 06 Mar 1905 | United States of America | California | Del Rio near Colorado River | — |
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| Psorothamnus emoryi var. emoryi | D. T. MacDougal s.n. | Feb 1904 | Mexico | Baja California | 15 miles north of San… | — | ||||
| Viburnum edule (Michx.) Raf. | D. T. MacDougal 258 | 31 Jul 1900 | United States of America | Idaho | Minard's Bay, Priest Lake. | — |
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| Sambucus neomexicana Wooton | D. T. MacDougal 138 | 18 Jun 1898 | United States of America | Arizona | Vicinity of Flagstaff | — |
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| Sambucus cerulea Raf. | D. T. MacDougal 5 | 23 Jul 1900 | United States of America | Idaho | Mac Abee's Ranch, Priest River… | — |
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| Sambucus cerulea var. neomexicana (Wooton) Rehder | D. T. MacDougal 138 | 18 Jun 1898 | United States of America | Arizona | Vicinity of Flagstaff | — |
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| Psorothamnus spinosus (A.Gray) Barneby | D. T. MacDougal 171 | 08 Apr 1905 | Mexico | Baja California | Around Cucapa Mts. | — |
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| Psorothamnus spinosus (A.Gray) Barneby | D. T. MacDougal 12 | 14 Mar 1905 | United States of America | Arizona | Near Mts. Needles | — |
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| Psorothamnus spinosus (A.Gray) Barneby | D. T. MacDougal s.n. | Feb 1904 | Mexico | Baja California | San Felipe Bay | — |
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| Acacia greggii A.Gray | D. T. MacDougal 168 | 7 Apr 1905 | Mexico | Baja California | Mexicali Mun. Cucapa Mts., B.C. | — | ||||
| Solanum hindsianum Benth. | D. T. MacDougal 16 | 11/15/23 | Mexico | Sonora | Picu. | — |
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| Astragalus aridus A.Gray | D. T. MacDougal s.n. | 03 Jan 1904 | Mexico | Sonora | Mesa near La Grulla | — |
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| Astragalus aridus A.Gray | D. T. MacDougal 227 | 21 Apr 1905 | Mexico | Baja California | [illegible] of [illegible] | — |
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| Senna hirsuta var. hirta H.S.Irwin & Barneby | D. T. MacDougal s.n. | 08 Jan 1970 | Mexico | Chiapas | Rio Salvador, Tapilula | — |
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| Senna hirsuta var. hirta H.S.Irwin & Barneby | D. T. MacDougal s.n. | 27 Nov 1970 | Mexico | Chiapas | Comalapa, near Cd. Cuauhtémoc | — |
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| Erigeron macdougalii A.Heller | D. T. MacDougal 390 | 07 Aug 1898-10 Aug 1898 | United States of America | Arizona | On Humphrey's Peak of San… | isotype |
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| Penstemon arizonicus A.Heller | D. T. MacDougal 392 | 07 Aug 1898-10 Aug 1898 | United States of America | Arizona | Humphrey's Peak of San Francisco… | isotype |
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| Verbena macdougalii A.Heller | D. T. MacDougal 249 | 08 Jul 1898 | United States of America | Arizona | In the vicinity of Flagstaff | isotype |
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| Hymenoclea salsola var. pentalepis (Rydb.) L.D.Benson | D. T. MacDougal s.n. | Feb 1904 | Mexico | Baja California | San Felipe Bay | — |
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| Astragalus crotalariae (Benth.) A.Gray | D. T. MacDougal 223 | 02 Apr 1905 | Mexico | Baja California | Plains of New River | — |
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