Displaying 1 - 75 out of 161 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Acacia constricta Benth. | J. Gregg s.n. | 11 Apr 1847 | Mexico | Coahuila | Rocky highland, west of Castañuela | probable syntype |
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| Acacia constricta Benth. | J. Gregg s.n. | 11 Apr 1847 | Mexico | Coahuila | Rocky highland, west of Castañuela | — |
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| Acacia greggii A.Gray | J. Gregg s.n. | 10 Apr 1847 | Mexico | — | W of Los Patos, dry… | possible isotype |
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| Agrostis canina L. | J. Gregg s.n. | 15 Apr 1849 | United States of America | Colorado | Valley of [illegible] | — |
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| Alnus oblongifolia Torr. | J. Gregg 611 | 1848-1849 | Mexico | — | — |
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| Amoreuxia wrightii A.Gray | J. Gregg s.n. | 15 Oct 1852 | United States of America | Texas | Val Verde Co. mouth of… | — |
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| Amoreuxia wrightii A.Gray | J. Gregg s.n. | s.d. | United States of America | New Mexico | Rio Grande | — |
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| Amoreuxia wrightii A.Gray | J. Gregg s.n. | 29 May 1847 | — | — | West of Cerralbo. | — |
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| Anisacanthus insignis A.Gray | J. Gregg 504 | 02 Apr 1847 | Mexico | — | Valley of Río Conchos (below… | lectotype |
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| Arbutus tessellata P.D.Sørensen | J. Gregg 629 | 1848-49 | Mexico | Hidalgo | Mineral del Monte. | — |
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| Asclepias asperula (Decne.) Woodson | J. Gregg s.n. | 23 Apr 1847 - 29 Apr 1847 | — | — | dry valley near Ojito | — |
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| Asclepias linearis Scheele | J. Gregg s.n. | May 1847 | United States of America | Texas | west of Mata-Moros | — |
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| Astragalus micranthus var. seatonii (M.E.Jones) Barneby | J. Gregg s.n. | s.d. | Mexico | — | — |
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| Astragalus mollissimus var. earlei (Greene ex Rydb.) Tidestr. | J. Gregg s.n. | April 28 | Mexico | Chihuahua | Near Chihuahua | — |
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| Astragalus wootonii E.Sheld. var. wootonii | J. Gregg s.n. | s.d. | Mexico | Chihuahua | SE of Chihuahua | — |
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| Astragalus wootonii E.Sheld. var. wootonii | J. Gregg s.n. | 28 Apr 1847 | Mexico | Chihuahua | SE of Chihuahua | — |
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| Astrolepis integerrima (Hook.) D.M.Benham & Windham | J. Gregg 297 | 1848 - 1849 | Mexico | — | Buenavista | — |
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| Atriplex canescens (Pursh) Nutt. | J. Gregg s.n. | 07 May 1847 | United States of America | New Mexico | Near Andabrazo Cr. XX from… | — |
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| Atriplex canescens (Pursh) Nutt. | J. Gregg | 11 Apr 1847 | Mexico | — | Plains east of Parras. Abundant… | — |
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| Atriplex greggii S.Watson | J. Gregg 462 | 1848-1849 | Mexico | — | Cerro Bavor {?illegible] | isotype |
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| Atriplex monilifera S.Watson | J. Gregg s.n. | 13 Apr 1847 | Mexico | Chihuahua | Bolton de Mapiri | isotype |
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| Baileya multiradiata Harv. & A.Gray | J. Gregg s.n. | 21 Apr 1847 & 28 Apr 1847 | Mexico | — | Valley of Conchos (21 Apr… | type |
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| Baileya pleniradiata Harv. & A.Gray | J. Gregg 37 | 11 May 1847 | Mexico | — | From valley of [Naz...], Hac.… | type |
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| Baileya pleniradiata Harv. & A.Gray | J. Gregg 28 | 17 Apr 1847 | Mexico | — | Near Garalito | type |
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| Berlandiera lyrata Benth. | J. Gregg s.n. | 23 Apr 1847 and 28 Apr 1847 | Mexico | Chihuahua | SE of Chihuahua | — |
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| Boerhavia linearifolia A.Gray | J. Gregg 110 | 1848 - 1849 | Mexico | Nuevo León | Monterrey | — |
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| Bouteloua gracilis (Kunth) Lag. ex Griffiths | J. Gregg 370 | 1848 - 1849 | Mexico | — | — |
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| Caesalpinia sessilifolia S.Watson | J. Gregg s.n. | 10 May 1847 | Mexico | — | Bolson de Mapimi | type |
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| Calliandra eriophylla Benth. var. eriophylla | J. Gregg s.n. | 28 Apr 1847 | Mexico | Chihuahua | Chihuahua Mun. Near Chihuahua | — |
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| Capsicum annuum var. glabrisuculum (Dunal) Heiser & Pickersgill | J. Gregg s.n. | 28 May 1847 | Mexico | — | West of Cerralto | — |
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| Carex greggii Carey | J. Gregg s.n. | 22 Apr 1847 | — | — | Near San Pablo | possible type |
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| Carlowrightia torreyana Wassh. | J. Gregg s.n. | 28 Jan 1847 | — | — | Monterey | — |
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| Cassia greggii A.Gray | J. Gregg s.n. | 25 May 1847&28 Jul 1847 | Mexico | Nuevo León | Monterrey Mun. W of Rinconada,… | isotype |
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| Castela erecta Turpin | J. Gregg | May 4/47 | — | — | S.W. of Quapiquilla | — |
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| Chamaesaracha sordida (Dunal) A.Gray | J. Gregg s.n. | 05 Feb 1847 | Mexico | Nuevo León | Ramparts, on "Bishop's Hill". Near… | — |
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| Chara contraria A.Braun ex Kütz. | J. Gregg s.n. | 08 May 1847 | Mexico | — | Cadena | — |
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| Chara vulgaris L. | J. Gregg s.n. | 09 Feb 1847 | Mexico | — | from river of Monterey | — |
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| Chrysactinia mexicana A.Gray | J. Gregg s.n. | 22 May 1847 | Mexico | — | High ground near Buenavista | syntype |
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| Chrysactinia mexicana A.Gray | J. Gregg s.n. | Apr 1847 | Mexico | Nuevo León | In valley west of Saltillo | syntype |
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| Cladophora pithophoroides H.K.Phinney | J. Gregg s.n. | s.d. | Mexico | — | near Monterey | — |
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| Clavigera spinulosa A.Gray | J. Gregg s.n. | 28 Apr 1847 | Mexico | Chihuahua | High plain near Chihuahua | type |
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| Condalia warnockii M.C.Johnst. var. warnockii | J. Gregg s.n. | 17 Apr 1847 | Mexico | — | Northwest of Mapimi | — |
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| Cordia greggii Torr. | J. Gregg s.n. | 15 Apr 1847 & 07 May 1847 | Mexico | — | Chaparro de San Pedro &… | type |
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| Coreopsis tinctoria var. similis (F.E.Boynton) H.M.Parker ex E.B.Sm. | J. Gregg s.n. | 05 Jun 1847 | Mexico | — | West of Matamoros. | — |
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| Dalea bicolor var. argyrea (A.Gray) Barneby | J. Gregg s.n. | 19 May 1887 | Mexico | — | Plain near Castamuela | — |
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| Dalea greggii A.Gray | J. Gregg s.n. | 27 Mar 1847 | Mexico | Coahuila | Buenaventura. | isolectotype |
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| Dalea greggii A.Gray | J. Gregg s.n. | Oct 1852 | Mexico | Chihuahua | not a type | |||||
| Dalea lutea (Cav.) Willd. var. lutea | J. Gregg 388 | 1848 - 1849 | Mexico | — | — |
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| Dalea pogonathera A.Gray var. pogonathera | J. Gregg 461 | 1848 - 1849 | Mexico | — | Saltillo | — |
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| Dermatophyllum secundiflorum (Ortega) Gandhi & Reveal | J. Gregg s.n. | 23 Jan 1847 - 11 Feb 1847 | — | — | between Monterey + Rinconada | — |
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| Dermatophyllum secundiflorum (Ortega) Gandhi & Reveal | J. Gregg s.n. | 05 Apr 1847 | Mexico | — | found from S. Antonio de… | — |
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| Dichaetophora campestris A.Gray | J. Gregg 48 | 06 Feb 1847 | Mexico | Nuevo León | "Bishop's Hill" near Monterrey | type |
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| Dichaetophora campestris A.Gray | J. Gregg s.n. | 21 Apr 1847 | Mexico | — | Valley of Río Conchos | syntype |
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| Drejera greggii Torr. | J. Gregg 587 | 1848-1849 | Mexico | — | Battleground of Paso del Gallinero | lectotype |
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| Drejera puberula Torr. | J. Gregg 504 | 02 Apr 1847 | Mexico | — | Valley of Río Conchos (below… | holotype |
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| Dyssodia micropoides (DC.) Loes. | J. Gregg s.n. | 05 Feb 1847 | United States of America | California | Bishop's Hill, near Monterey. | — |
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| Echinocactus longihamatus var. crassispinus Engelm. | J. Gregg s.n. | 15 Apr 1847 | Mexico | — | Bolson de Mapimi | probable isotype |
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| Engelmannia pinnatifida Nutt. | J. Gregg 64 | 22 May 1847 | Mexico | México | Tultitlán Mun. Buenavista. | — |
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| Erigeron spinosus Benth. | J. Gregg 266 | 1848 - 1849 | Mexico | Coahuila | Saltillo | — |
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| Eriogonum ciliatum Torr. ex Benth. | J. Gregg 83 | 1848-1849 | Mexico | — | Monterey | syntype |
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| Eriogonum ciliatum var. foliosum Torr. | J. Gregg s.n. | 20 May 1847 | Mexico | — | Near San Juan de la… | holotype |
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| Erioneuron pilosum (Buckley) Nash var. pilosum | J. Gregg 205 | 1848 - 1849 | Mexico | — | Saltillo. | — |
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| Euphorbia Lanj. | J. Gregg | 29 May 1847 | Mexico | — | Gemalho (spelling?) | — |
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| Euphorbia pilosula Engelm. ex Boiss. | J. Gregg 792 | 1848-1849 | Mexico | — | Tiristirina | isotype |
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| Euphorbia serpens Kunth | J. Gregg s.n. | 15 Apr 1847 | Mexico | — | Valley of Nazas | — |
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| Euphorbia villifera Scheele | J. Gregg 147 | s.d. | United States of America | New Mexico | — |
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| Forestiera phillyreoides var. spathulifolia Torr. | J. Gregg | 09 Feb 1847 | Mexico | — | Near Monterey | syntype |
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| Forestiera phillyreoides var. spathulifolia Torr. | J. Gregg | 22 Apr 1847 | Mexico | — | SW of San Pablo | syntype |
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| Gaillardia pinnatifida Torr. | J. Gregg s.n. | 29 Apr 1847 | Unknown | — | Rich valley near San Pablo | — |
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| Giliastrum acerosum (A.Gray) Rydb. | J. Gregg s.n. | 22 May 1847 | Mexico | Nuevo León | Battlefield, near Buenavista | — |
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| Gonolobus productus Torr. | J. Gregg | 08 May 1847 | Mexico | — | Cadena | syntype |
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| Haploësthes greggii A.Gray | J. Gregg 68 | 18 May 1847 | Mexico | — | Near Cienaga Grande | isotype |
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| Havardia pallens (Benth.) Britton & Rose | J. Gregg s.n. | 25 May 1847 | Mexico | — | E of Rinconada | — |
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| Helenium amphibolum A.Gray | J. Gregg s.n. | 29 Jan 1847 | Mexico | — | From ditch, near Tenería fort,… | isolectotype |
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| Helenium ooclinium A.Gray | J. Gregg 27 | 11 May 1847 | Mexico | — | Valley of Nazos, Bolson de… | isotype |
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