Displaying 1926 - 1950 out of 1985 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Opuntia echinocarpa Engelm. & J.M.Bigelow | D. T. MacDougal 38731 | 1913 | United States of America | California | Willow Springs. | — |
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| Grusonia junzei (Rose) Pinkava | D. T. MacDougal 13.94 | 1913 | United States of America | Arizona | Pima Co. South of Quijotoa… | — |
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| Ferocactus cylindraceus (Engelm.) Orcutt subsp. cylindraceus | D. T. MacDougal 38356 | 1913 | United States of America | California | Riverside Co. near Palm Springs | — |
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| Ferocactus cylindraceus var. lecontei Bravo | D. T. MacDougal 38355 | 1913 | United States of America | California | Palo Verde. | — |
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| Oenothera biennis L. | D. T. MacDougal D90 | 31 May 1915 | United States of America | New York | Bronx Co. New York Botanical… | — |
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| Opuntia leptocaulis DC. | D. T. MacDougal s.n. | Apr 1916 | United States of America | Arizona | near Tucson | — |
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| Opuntia phaeacantha Engelm. | D. T. MacDougal s.n. | 28 Oct 1920 | United States of America | California | 3 miles north of San… | — |
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| Opuntia oricola Philbrick | D. T. MacDougal s.n. | 30 Oct 1920 | United States of America | California | Between Santa Barbara and Ventura | — |
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| Neolloydia texensis Britton & Rose | D. T. MacDougal s.n. | Dec 1920 | United States of America | Texas | Sanderson | syntype |
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| Neolloydia texensis Britton & Rose | D. T. MacDougal s.n. | Dec 1920 | United States of America | Texas | Sanderson | syntype |
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| Opuntia spinosior (Engelm.) Toumey | D. T. MacDougal s.n. | Mar 1921 | United States of America | Arizona | Northeastern side of the Santa… | — |
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| Echinocereus bonkerae Thornber & Bonker | D. T. MacDougal 21105 | 6 May 1921 | United States of America | Arizona | Pinal Co. Oracle | — |
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| Opuntia vaseyi Britton & Rose | D. T. MacDougal s.n. | 24 May 1921 | United States of America | California | Moorpark. | — |
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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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| Bursera microphylla A.Gray | D. T. MacDougal s.n. | 05 May 1923 | Mexico | Sonora | East of Port Libertad. | — |
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| Bursera microphylla A.Gray | D. T. MacDougal s.n. | 14 Nov 1923 | Mexico | Sonora | — |
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| Errazurizia megacarpa (S.Watson) I.M.Johnst. | D. T. MacDougal 22 | 15 Nov 1923 | Mexico | Sonora | Libertad | — | ||||
| Solanum hindsianum Benth. | D. T. MacDougal 16 | 11/15/23 | Mexico | Sonora | Picu. | — |
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| Lycium | D. T. MacDougal 35 | 16 Nov 1923 | Mexico | Sonora | Kino Pt. | — |
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| Citharexylum shrevei Moldenke | D. T. MacDougal 59 | 19 Nov 1923 | Mexico | Sonora | Picu Pass | type fragment |
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| Neomammillaria sheldonii (Rose) Britton | D. T. MacDougal s.n. | 1923 | Mexico | — | — |
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| Wilcoxia sykesii | D. T. MacDougal s.n. | 1923 | Mexico | Sonora | possible type |
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| Opuntia treleasei J.M.Coult. | D. T. MacDougal 4359 | 20 Oct 1932 | United States of America | California | Kern Co. W. base of… | — |
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| Nopalxochia ackermannii (Haw.) F.M.Knuth | D. T. MacDougal s.n. | 04 Nov 1953 | Mexico | Oaxaca | Heroica Ciudad de Tlaxiaco Mun.… | — |
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| Selenicereus grandiflorus (L.) Britton & Rose | D. T. MacDougal A228 | 18 Apr 1954 | Mexico | Chiapas | Ocozocoautla de Espinosa. Llano de… | — |
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