Displaying 1 - 50 out of 401 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Abutilon grandidentatum Fryxell | T. B. MacDougall H143 | 11 Dec 1971 | Mexico | Oaxaca | Cerro Guiengola, Tehuantepec | holotype | 186380 |
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| Abutilon tehuantepecense Fryxell | T. B. MacDougall H166 | 27 Dec 1971 | Mexico | Oaxaca | Cerro de las Animas, Tehuantepec | holotype | 188217 |
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| Acacia angustissima (Mill.) Kuntze | T. B. MacDougall H22 | 5 Jul 1971-6 Jul 1971 | Mexico | Oaxaca | Juchitan de Zaragoza Mun. Santa… | — | 548084 | ||
| Acacia angustissima (Mill.) Kuntze | T. B. MacDougall s.n. | 10 Sep 1969 | Mexico | Oaxaca | La Compañia. El Vado, Ejutla,… | — | 548194 | ||
| Acacia carbonaria Schltdl. | T. B. MacDougall s.n. | 2 Mar 1966 | Mexico | Oaxaca | Asuncion Ixtaltepec Mun. Nizanda -… | — | 552483 | ||
| Acacia centralis (Britton & Rose) Lundell | T. B. MacDougall H.230 | 2 Feb 1972 | Mexico | Oaxaca | Pto. San Bartolo, Oax | — | 552487 | ||
| Acacia centralis (Britton & Rose) Lundell | T. B. MacDougall H.363 | 2 Apr 1972 | Mexico | Oaxaca | Santo Domingo Tehuantepec Mun. Cerro… | — | 552486 | ||
| Acacia centralis (Britton & Rose) Lundell | T. B. MacDougall s.n. | 30 Apr 1970 | Mexico | Oaxaca | Santo Domingo Tehuantepec Mun. Between… | — | 552488 | ||
| Acacia cochliacantha f. houghii (Britton & Rose) Seigler & Ebinger | T. B. MacDougall s.n. | 29 Apr 1971 | Mexico | Oaxaca | Santo Domingo Tehuantepec Mun. E… | — | 552572 | ||
| Acacia picachensis Brandegee | T. B. MacDougall H.465 | 23 May 1972 | Mexico | Oaxaca | Asuncion Ixtaltepec Mun. Masahui, Juchitan,… | — | 553267 | ||
| Acacia pringlei Rose subsp. pringlei | T. B. MacDougall s.n. | 17 Feb 1970 | Mexico | Oaxaca | San Pablo, Tehuantepec, Oax. | — | 553291 | ||
| Acalypha schiedeana Schltdl. | T. B. MacDougall H502 | 06 Jun 1972 - 07 Jun 1972 | Mexico | Oaxaca | Tehuantepec Mun. Cerro Guiengola | — | 3906845 |
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| Adenopodia oaxacana M.Sousa | T. B. MacDougall s.n. | 15 Nov 1970 | Mexico | Oaxaca | El Espinal Mun. Potrero Villalobos,… | — | 548320 | ||
| Adiantum concinnum Humb. & Bonpl. ex Willd. | T. B. MacDougall s.n. | 1961 | Mexico | Oaxaca | — | 3915234 |
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| Ageratum | T. B. MacDougall s.n. | 20 Dec 1969 | Mexico | Oaxaca | Oaxaca de Juárez Mun. Cerro… | — | 359416 |
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| Amicia zygomeris DC. | T. B. MacDougall H98 | 08 Nov 1971 | Mexico | Oaxaca | Juquila. Lacháo, Río Sal. | — | 01912772 | ||
| Anaphalis aecidiocephala Grierson | T. B. MacDougall s.n. | Dec 1963 | Mexico | Oaxaca | Cerro de Humo Chico, Comaltepec,… | — | 359950 |
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| Anaphalis aecidiocephala Grierson | T. B. MacDougall s.n. | 8 Feb 1966 | Mexico | Oaxaca | Cerro de Humo Chico, Comaltepec,… | — | 359949 |
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| Anthurium scandens (Aubl.) Engl. | T. B. MacDougall H216 | 27 Jan 1972 | Mexico | Chiapas | Ocozocoautla de Espinosa Mun. Llano… | — | 3774726 |
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| Anthurium schlechtendalii Kunth | T. B. MacDougall H261 | 19 Feb 1972 | Mexico | Chiapas | Ocozocoautla de Espinosa Mun. La… | — | 03774798 |
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| Anthurium seleri Engl. | T. B. MacDougall 703 | 05 Dec 1969 | Mexico | Chiapas | Cintalapa Mun. Rizo de Oro,… | — | 03774816 |
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| Anthurium seleri Engl. | T. B. MacDougall H260 | 19 Feb 1972 | Mexico | Chiapas | Ocozocoautla de Espinosa Mun. La… | — | 3774817 |
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| Arbutus occidentalis McVaugh & Rosatti | T. B. MacDougall A | 16 Feb 1942 | Mexico | Oaxaca | Cerro Nueve Flan. ca 1/2… | — | 01874881 |
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| Arbutus occidentalis McVaugh & Rosatti | T. B. MacDougall | 29 May 1968 | Mexico | Oaxaca | Ixtlán de Juárez Mun. Cerro… | — | 1874882 |
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| Arctostaphylos pungens Kunth | T. B. MacDougall s.n. | 16 Feb 1942 | Mexico | Oaxaca | Cerro Nueve Flan. ca 1/2… | — | 1875264 |
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| Arctostaphylos pungens Kunth | T. B. MacDougall s.n. | 16 Feb 1942 | Mexico | Oaxaca | Cerro Nueve Flan. ca 1/2… | — | 1875265 |
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| Arctostaphylos pungens Kunth | T. B. MacDougall s.n. | 11 Jun 1970 | Mexico | Oaxaca | Ixtlán de Juárez Mun. El… | — | 1875266 |
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| Asclepias angustifolia Sessé & Moc. | T. B. MacDougall H131 | 24 Nov 1971 | Mexico | Oaxaca | Tehuantepec Mun. S. Mateo del… | — | 4175674 |
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| Asclepias woodsoniana Standl. & Steyerm. | T. B. MacDougall H221 | 30 Jan 1971 | Mexico | Oaxaca | Tehuantepec Mun. Cerro Tecuani | — | 4176400 |
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| Baccharis | T. B. MacDougall s.n. | 30 Jan 1971-31 Jan 1971 | Mexico | Oaxaca | Vista Hermosa, Dto. Ixtlan, Mpio.… | — | 361704 |
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| Bakeridesia macdougallii Donnell | T. B. MacDougall H280 | 21 Feb 1972 | Mexico | Oaxaca | Tres Cruces. Tehuantepec. | — | 03227705 |
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| Bakeridesia macdougallii Donnell | T. B. MacDougall s.n. | 10 Feb 1971 | Mexico | Oaxaca | Tehuantepec, Las Animas. | — | 04382486 |
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| Barkeria obovata (C.Presl) Christenson | T. B. MacDougall H149 | 16 Dec 1972 | Mexico | Oaxaca | Putla Mun. S. Vicente | — | 3998162 |
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| Barkeria scandens (Lex.) Dressler & Halb. | T. B. MacDougall H48 | 21 Oct 1971 | Mexico | Oaxaca | Portillo Nejapa - El Convento,… | — | 03998167 |
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| Barkeria uniflora (Lex.) Dressler & Halb. | T. B. MacDougall H148 | 16 Dec 1971 | Mexico | Oaxaca | Putla Mun. S. Vicente | — | 03998174 |
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| Bartlettina macdougallii R.M.King & H.Rob. | T. B. MacDougall s.n. | 30 Jan 1971 - 31 Jan 1971 | Mexico | Oaxaca | Ixtlan, Comaltepec, Vista Hermosa. | holotype | 04955180 |
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| Bejaria aestuans Mutis ex L. | T. B. MacDougall s.n. | 21 May 1969 | Mexico | Oaxaca | Ixtlán de Juárez Mun. La… | — | 1875381 |
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| Bejaria aestuans Mutis ex L. | T. B. MacDougall s.n. | 03 Jan 1971 | Mexico | Oaxaca | Juquila. Sta. Rosa, Lachao. | — | 1875367 |
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| Bidens | T. B. MacDougall H522 | 17 Oct 1972 | Mexico | Oaxaca | Putla Villa de Guerrero Mun.… | — | 362914 |
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| Bidens | T. B. MacDougall H43 | 20 Oct 1971 | Mexico | Morelos | Yautepec Mun. S. Juan La… | — | 362915 |
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| Billbergia pallidiflora Liebm. | T. B. MacDougall s.n. | 27 Apr 1971 | Mexico | Oaxaca | Barranco Hondo, S. Bartolo Yautepec,… | — | 03805876 |
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| Bletia parkinsonii Hook. | T. B. MacDougall H247 | 10 Feb 1972 | Mexico | Oaxaca | Sola de Vega Mun. Reyes | — | 03998330 |
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| Bletia reflexa Lindl. | T. B. MacDougall H47 | 20 Oct 1971 | Mexico | Oaxaca | Portillo Nejapa - El Convento,… | — | 3998421 |
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| Brassavola nodosa (L.) Lindl. | T. B. MacDougall H172 | 04 Jan 1972 | Mexico | Veracruz | Diaz Ordaz, Minatitlan | — | 951691 | ||
| Brickellia | T. B. MacDougall H297 | 28 Feb 1972 | Mexico | Oaxaca | Santa Catarina Juquila Mun. Juquila,… | — | 363658 |
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| Bursera | T. B. MacDougall s.n. | 18 Oct 1969 | Mexico | Oaxaca | Cerro San Pedro, Tehuantepec. | — | 1242256 |
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| Bursera | T. B. MacDougall s.n. | 24 May 1971 | Mexico | Oaxaca | Cerro Guiengola, Tehuantepec. | — | 1242080 |
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| Bursera bicolor (Willd. ex Schltdl.) Engl. | T. B. MacDougall 528.S | 18 Oct 1969 | Mexico | Oaxaca | Cerro San Pedro, Tehuantepec. | — | 1209470 | ||
| Bursera bicolor (Willd. ex Schltdl.) Engl. | T. B. MacDougall s.n. | 18 May 1971 - 19 May 1971 | Mexico | Oaxaca | Tehuantepec. | — | 1209481 | ||
| Bursera bipinnata (DC.) Engl. | T. B. MacDougall s.n. | 06 Dec 1969 | Mexico | Oaxaca | Tres Cruces, Tehuantepec. | — | 1189744 |