Displaying 1 - 75 out of 3803 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Penstemon superbus A.Nelson | R. D. Worthington 13946 | 12 Apr 1986 | United States of America | Arizona | Cochise Co. Peloncillo Mountains, Skeleton… | — | 662066 |
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| Penstemon thurberi Torr. | R. D. Worthington 10782 | 27 Jun 1983 | United States of America | New Mexico | Luna Co. 4.1 road miles… | — | 662548 |
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| Penstemon thurberi Torr. | R. D. Worthington 12619 | 09 Sep 1984 | United States of America | New Mexico | Hidalgo Co. Little Hatchet Mountains,… | — | 662549 |
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| Quercus hinckleyi C.H.Müll. | R. D. Worthington 21733 | 23 Mar 1993 | United States of America | Texas | Brewster Co. The Solitario, Lefthand… | — | 24060 |
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| Ephedra aspera Engelm. ex S.Watson | R. D. Worthington 12089 | 03 Jun 1984 | United States of America | Texas | Terrell Co. 9.2 road miles… | — | 70014 |
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| Ephedra aspera Engelm. ex S.Watson | R. D. Worthington 19317 | 30 May 1991 | United States of America | Texas | El Paso Co. Hueco Mountains,… | — | 70019 |
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| Ephedra aspera Engelm. ex S.Watson | R. D. Worthington 13620 | 17 Apr 1987 | United States of America | New Mexico | Doña Ana Co. Bishop's Cap,… | — | 70021 |
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| Ephedra torreyana S.Watson | R. D. Worthington 11903 | 05 May 1984 | United States of America | Texas | Hudspeth Co. 12.5 miles east… | — | 70377 |
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| Ephedra torreyana S.Watson | R. D. Worthington 16556 | 14 May 1988 | United States of America | New Mexico | Chaves Co. Along US 70,… | — | 70407 |
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| Ephedra trifurca Torr. ex S.Watson | R. D. Worthington 24587 | 15 Apr 1995 | United States of America | New Mexico | Luna Co. Cedar Mountains, ca.… | — | 70570 |
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| Ephedra trifurca Torr. ex S.Watson | R. D. Worthington 13627 | 24 Apr 1988 | United States of America | New Mexico | Doña Ana Co. [Organ Mountains]:… | — | 70573 |
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| Penstemon buckleyi Pennell | R. D. Worthington s.n. | 17 Mar 1985 | United States of America | Texas | Ward Co. Along I-20, 3… | — | 572596 |
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| Asphodelus fistulosus L. | R. D. Worthington 11848 | 15 Apr 1984 | United States of America | New Mexico | Luna Co. Along hwy. I-10… | — | 643205 |
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| Townsendia annua Beaman | R. D. Worthington 12553 | 09 Sep 1984 | United States of America | Texas | Hudspeth Co. Gypsum dunes 12.5… | — | 581053 |
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| Penstemon pinifolius Greene | R. D. Worthington 7500 | 08 Aug 1981 | United States of America | New Mexico | Grant Co. Black Range, Galinas… | — | 630518 |
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| Penstemon ambiguus Torr. | R. D. Worthington 12121 | 16 Jun 1984 | United States of America | Texas | Hudspeth Co. 12.5 miles east… | — | 569744 |
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| Penstemon ambiguus Torr. | R. D. Worthington 14582 | 07 Aug 1986 | Mexico | Chihuahua | Along the New Mexico-Chihuahua border… | — | 772365 |
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| Eragrostis unioloides (Retz.) Nees ex Steud. | R. D. Worthington 9369 | 07 Jan 1983-08 Jan 1983 | Mexico | Sinaloa | Sierra Madre Occidental, 6.0 rd.… | — | 630719 |
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| Penstemon dasyphyllus A.Gray | R. D. Worthington 10429 | 17 May 1983 | United States of America | Arizona | Cochise Co. Chiricahua Mountains, Tex… | — | 590077 |
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| Lithospermum worthingtonii B.L.Turner | R. D. Worthington 89004 | 19 Aug 1982 | Mexico | Durango | Sierra Madre Occidental, 5.1 road… | isotype | 335540 |
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| Convolvulus arvensis L. | R. D. Worthington 13246 | 09 Jun 1985 | United States of America | New Mexico | Sierra Co. Black Range, Emory… | — | 643031 |
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| Tribulus terrestris L. | R. D. Worthington 12366 | 21 Aug 1984 | United States of America | Texas | Hudspeth Co. 10.1 mi. E… | — | 643459 |
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| Penstemon fendleri Torr. & A.Gray | R. D. Worthington s.n. | 23 May 1984 | United States of America | Texas | Brewster Co. Marathon, roadside of… | — | 593708 |
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| Penstemon laxiflorus Pennell | R. D. Worthington 18409 | 31 Mar 1990 | United States of America | Texas | Fayette Co. Roadside park along… | — | 605029 |
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| Penstemon baccharifolius Hook. | R. D. Worthington 12052 | 03 Jun 1984 | United States of America | Texas | Terrell Co. 9.2 road miles… | — | 572485 |
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| Penstemon havardii A.Gray | R. D. Worthington 9724 | 10 Apr 1983 | Mexico | Chihuahua | Mpio. Praxedis G. Guerrero, Sierra… | — | 773082 |
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| Penstemon havardii A.Gray | R. D. Worthington 9724 | 10 Apr 1983 | Mexico | Chihuahua | Mpio. Praxedis G. Guerrero, Sierra… | — | 773081 |
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| Dyssodia acerosa DC. | R. D. Worthington 14556 | 2 Aug 1986 | Mexico | Chihuahua | Juárez Mun. Sierra Juárez, S… | — | 367203 |
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| Penstemon alamosensis Pennell & G.T.Nisbet | R. D. Worthington 8063 | 04 Apr 1982 | United States of America | Texas | El Paso Co. Hueco Mountains,… | — | 541481 |
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| Russelia worthingtonii B.L.Turner | R. D. Worthington 9367 | 07 Jan 1983 | Mexico | Sinaloa | Sierra Madre Occidental, 4.9 rd.… | isotype | 130621 |
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| Zygophyllum fabago L. | R. D. Worthington 13167 | 19 May 1985 | United States of America | New Mexico | Doña Ana Co. 1 air… | — | 643392 |
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| Penstemon whippleanus A.Gray | R. D. Worthington 12294 | 07 Aug 1984 | United States of America | New Mexico | Lincoln Co. White (=Sacramento) Mountains,… | — | 771856 |
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| Cirsium pallidum Wooton & Standl. | R. D. Worthington 12309 | 07 Aug 1984 | United States of America | New Mexico | Lincoln Co. White (=Sacramento) Mountains,… | — | 30938 |
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| Elaeagnus angustifolia L. | R. D. Worthington 17983 | 04 Jul 1989 | United States of America | New Mexico | Doña Ana Co. Along the… | — | 786025 |
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| Tamarix ramosissima Ledeb. | R. D. Worthington 12380 | 21 Aug 1984 | United States of America | Texas | Hudspeth Co. 10.1 mi. E… | — | 643354 |
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| Tamarix ramosissima Ledeb. | R. D. Worthington 17182 | 03 Sep 1988 | United States of America | Texas | El Paso Co. Three Sisters… | — | 643381 |
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| Tamarix ramosissima Ledeb. | R. D. Worthington 14131 | 25 May 1986 | United States of America | Texas | El Paso Co. Along the… | — | 643362 |
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| Penstemon cardinalis Wooton & Standl. | R. D. Worthington 12184 | 01 Jul 1984 | United States of America | New Mexico | Lincoln Co. White Mountains, Eagle… | — | 573024 |
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| Lepidium latifolium L. | R. D. Worthington 17947 | 19 May 1989 | United States of America | New Mexico | Doña Ana Co. Anapra, along… | — | 76590 |
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| Solanum rostratum Dunal | R. D. Worthington 22218 | 26 Jun 1993 | United States of America | Texas | Jeff Davis Co. Davis Mts.,… | — | 00820802 |
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| Solanum elaeagnifolium Cav. | R. D. Worthington 12668 | 16 Sep 1984 | United States of America | Texas | Hudspeth Co. Along graded rd.… | — | 00827131 |
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| Senna wislizeni (A.Gray) H.S.Irwin & Barneby var. wislizeni | R. D. Worthington 23492 | 05 Sep 1994 | United States of America | New Mexico | Hidalgo Co. Little Hatchet Mts.,… | — | 1582569 |
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| Senna wislizeni (A.Gray) H.S.Irwin & Barneby var. wislizeni | R. D. Worthington 13449 | 02 Sep 1985 | United States of America | New Mexico | Hidalgo Co. Apache Hills, slopes… | — | 1582570 |
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| Echinochloa crus-galli (L.) P.Beauv. | R. D. Worthington 15109 | 20 Sep 1986 | United States of America | New Mexico | Hidalgo Co. Peloncillo Mts., Coronado… | — | 1697809 |
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| Elionurus barbiculmis Hack. | R. D. Worthington 12644 | 09 Sep 1984 | United States of America | New Mexico | Hidalgo Co. Little Hatchet Mts.,… | — | 1597237 |
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| Elymus arizonicus (Scribn. & J.G.Sm.) Gould | R. D. Worthington 19876 | 07 Sep 1991 | United States of America | Texas | El Paso Co. Franklin Mtns.;… | — | 1597586 |
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| Caryota urens L. | R. D. Worthington 13126 | 02 Aug 1987 | Malaysia | Pahang | Bukit Fraser (Fraser's Hill resort) | — | 01055841 |
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| Elymus elymoides (Raf.) Swezey | R. D. Worthington 16504 | 07 May 1988 | United States of America | New Mexico | Luna Co. Florida Mtns.; NE… | — | 1655052 |
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| Eragrostis barrelieri | R. D. Worthington 17212 | 04 Sep 1989 | United States of America | New Mexico | Doña Ana Co. Franklin Mts.,… | — | 1681647 |
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| Eragrostis cilianensis (All.) Vignolo ex Janch. | R. D. Worthington 17254 | 05 Sep 1988 | United States of America | New Mexico | Doña Ana Co. Bishop Cap,… | — | 1681879 |
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| Eragrostis cilianensis (All.) Vignolo ex Janch. | R. D. Worthington 17359 | 11 Sep 1988 | United States of America | Texas | El Paso Co. Hueco Tanks… | — | 1682159 |
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| Selaginella huehuetenangensis Hieron. | R. D. Worthington 21322 | 11 Aug 1992-12 Aug 1992 | Belize | Belize | Along western hwy. 28-32 mi… | — | 434016 |
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| Eragrostis intermedia Hitchc. | R. D. Worthington 12734 | 07 Oct 1984 | United States of America | Texas | El Paso Co. Franklin Mts.,… | — | 1683170 |
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| Chamaecrista greggii (A.Gray) Pollard ex A.Heller var. greggii | R. D. Worthington 8323 | 2 Jun 1982 | Mexico | Coahuila | 12.7 rd. mi NNE of… | — | 554239 |
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| Sanvitalia angustifolia Engelm. ex A.Gray | R. D. Worthington 8950 | 21 Aug 1982 | Mexico | Durango | Along hwy. 45 N of… | — | 426777 |
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| Chamaecrista rotundifolia (Pers.) Greene var. rotundifolia | R. D. Worthington 9336 | 7 Jan 1983-8 Jan 1983 | Mexico | Sinaloa | Sierra Madre Occidental, 6 rd.… | — | 554414 |
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| Calliandra houstoniana var. anomala (Kunth) Barneby | R. D. Worthington 9318 | 6 Jan 1983 | Mexico | Sinaloa | Sierra Madre Occidental, 7.5 rd.… | — | 00548642 |
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| Eragrostis lehmanniana Nees | R. D. Worthington 18761 | 03 Sep 1990 | United States of America | New Mexico | Luna Co. Little Florida Mts.,… | — | 1683402 |
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| Eragrostis pectinacea var. pectinacea | R. D. Worthington 14368 | 26 Jul 1986 | United States of America | Texas | Jeff Davis Co. Davis Mts.,… | — | 1699862 |
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| Pithecellobium keyense Britton | R. D. Worthington 23864 | 31 Dec 1994 - 08 Jan 1995 | Belize | Belize | Cay Corker (=Caye Caulker), sandy… | — | 01204002 |
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| Astragalus cobrensis A.Gray | R. D. Worthington 13185 | 25 May 1985 | United States of America | New Mexico | Grant Co. Pinos Altos Mts.,… | — | 01247672 |
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| Astragalus emoryanus var. terlinguensis (Cory) Barneby | R. D. Worthington 21724 | 23 Mar 1993 | United States of America | Texas | Brewster Co. The Solitario, E… | — | 01248980 |
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| Dalea albiflora A.Gray | R. D. Worthington 15171 | 21 Sep 1986 | United States of America | New Mexico | Hidalgo Co. Peloncillo Mts., Tank… | — | 01073334 |
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| Dalea brachystachys A.Gray | R. D. Worthington 15165 | 21 Sep 1986 | United States of America | New Mexico | Hidalgo Co. Peloncillo Mts., Tank… | — | 01241210 |
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| Dalea brachystachys A.Gray | R. D. Worthington 18708 | 02 Sep 1990 | United States of America | New Mexico | Luna Co. Florida Mts., Mahoney… | — | 01241213 |
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| Dalea brachystachys A.Gray | R. D. Worthington 15149 | 21 Sep 1986 | United States of America | New Mexico | Hidalgo Co. Peloncillo Mts., N… | — | 01241215 |
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| Astragalus humistratus A.Gray var. humistratus | R. D. Worthington 8627 | 10 Aug 1982 | United States of America | Arizona | Apache Co. White Mts., Luna… | — | 01250225 |
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| Astragalus humistratus var. sonorae (A.Gray) M.E.Jones | R. D. Worthington 13120 | 18 May 1985 | United States of America | New Mexico | Doña Ana Co. Organ Mts.,… | — | 01250295 |
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| Astragalus humistratus var. sonorae (A.Gray) M.E.Jones | R. D. Worthington 14040 | 21 Apr 1986 | United States of America | New Mexico | Hidalgo Co. Animas Valley, along… | — | 01250297 |
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| Dalea candida var. oligophylla (Torr.) Shinners | R. D. Worthington 12015 | 23 May 1984 | United States of America | Texas | Brewster Co. Marathon, roadside of… | — | 01258820 |
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| Astragalus lentiginosus var. australis Barneby | R. D. Worthington 20420 | 10 Apr 1992 | United States of America | New Mexico | Doña Ana Co. Potrillo Mts.,… | — | 01258703 |
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| Astragalus lentiginosus var. australis Barneby | R. D. Worthington 9655 | 01 Apr 1983 | United States of America | Texas | Hudspeth Co. Along I-10 just… | — | 01258704 |
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| Astragalus lentiginosus var. australis Barneby | R. D. Worthington 11748 | 07 Apr 1984 | United States of America | New Mexico | Hidalgo Co. Pyramid Mts., approx.… | — | 01258708 |
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| Astragalus lindheimeri A.Gray | R. D. Worthington 12916 | 05 Apr 1985 | United States of America | Texas | Callahan Co. Roadside of I-20… | — | 01261001 |
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| Astragalus lonchocarpus Torr. | R. D. Worthington 20938 | 29 May 1993 | United States of America | New Mexico | Mora Co. Wagon Mound, roadcut… | — | 01261083 |
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