Displaying 2051 - 2100 out of 2137 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Viburnum opulus L. | R. T. Clausen 6254 | 19 Mar 1944 | United States of America | New York | Tompkins Co. 4 km. southeast… | — |
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| Sambucus racemosa var. melanocarpa (A.Gray) McMinn | R. T. Clausen 6544 | 22 Apr 1945 | United States of America | New York | Tompkins Co. Along Lick Brook… | — |
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| Geum canadense Jacq. x G. aleppicum Jacq. | R. T. Clausen 5881 | 26 Jul 1942 | United States of America | New York | Tioga Co. edge of field… | — |
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| Gnaphalium vulcanicum I.M.Johnst. | R. T. Clausen s.n. | 24 Oct 1955 | Mexico | — | Barranca de Mala Cara, south-southeastern… | — |
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| Vaccinium angustifolium Aiton | R. T. Clausen 5924 | 31 Aug 1942 | United States of America | Vermont | Orleans Co. Summit of Jay… | — |
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| Myriopteris myriophylla (Desv.) J.Sm. | R. T. Clausen s.n. | 15 Sep 1955 | Mexico | Morelos | northern bank of railroad just… | — |
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| Myriopteris myriophylla (Desv.) J.Sm. | R. T. Clausen s.n. | 25 Nov 1955 | Mexico | Ciudad de México | on lava 5 m. east… | — |
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| Vaccinium pallidum Aiton | R. T. Clausen Coll. No.237Plant No. 3 | Jul 6 1955 | United States of America | Pennsylvania | Somerset Co. Conemaugh-Jenner Plateau. Moderately… | — |
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| Mimosa biuncifera Benth. | R. T. Clausen s.n. | 23 Aug 1955 | Mexico | Tlaxcala | Apetatitlán de Antonio Carvajal Mun.… | — |
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| Mimosa skinneri var. skinneri | R. T. Clausen 6105 | 9 Sep 1943 | Mexico | Chiapas | San Fernando Mun. West of… | — |
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| Solanum elaeagnifolium Cav. | R. T. Clausen 4597 | 09 Jun 1940 | United States of America | Oklahoma | Beckham Co. Red River Basin.… | — |
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| Mimosa albida Humb. & Bonpl. ex Willd. | R. T. Clausen 6028 | 21 Aug 1943 | Mexico | Morelos | Cuernavaca Mun. Along road 12… | — |
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| Mimosa albida Humb. & Bonpl. ex Willd. | R. T. Clausen 6135 | 16 Sep 1943 | Guatemala | Guatemala | Roadside near Finca El Ingenio,… | — |
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| Mimosa zygophylla Benth. | R. T. Clausen 7608 | 23 Apr 1949 | Mexico | Coahuila | 6.4 km N of Chorro… | — |
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| Mimosa texana (A.Gray) Small var. texana | R. T. Clausen 7586 | 18 Apr 1949 | Mexico | Coahuila | In limestone gravel in largest… | — |
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| Mimosa zygophylla Benth. | R. T. Clausen 7613 | 25 Apr 1949 | Mexico | Coahuila | Hill NW of Saltillo | — |
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| Senna pallida (Vahl) H.S.Irwin & Barneby var. pallida | R. T. Clausen 6188 | 01 Oct 1943 | Guatemala | Zacapa | Roadside near Jampu, east of… | — |
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| Senna pallida (Vahl) H.S.Irwin & Barneby var. pallida | R. T. Clausen 6189 | 01 Oct 1943 | Guatemala | Zacapa | Roadside between Santa Rosalia and… | — |
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| Senna uniflora (Mill.) H.S.Irwin & Barneby | R. T. Clausen 6037 | 21 Aug 1943 | Mexico | Morelos | Roadside at El Rodeo, 12… | — |
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| Senna argentea (Kunth) H.S.Irwin & Barneby | R. T. Clausen 6045 | 21 Aug 1943 | Mexico | Morelos | Xochitepec Mun. Alpuyeca, Mor. | — |
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| Senna atomaria (L.) H.S.Irwin & Barneby | R. T. Clausen 7427 | 2 Mar 1949 | Mexico | San Luis Potosí | 40 km N of Valles | — |
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| Ophioglossum reticulatum L. | R. T. Clausen 6216 | 15 Oct 1943 | Mexico | Veracruz | Orizaba Mun. Along trail half… | — |
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| Myriopteris lanosa (Michx.) Grusz & Windham | R. T. Clausen 5716 | 31 Mar 1942 | United States of America | Alabama | Bibb Co. East bank of… | — |
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| Pellaea atropurpurea (L.) Link | R. T. Clausen 5707 | 31 Mar 1942 | United States of America | Alabama | Bibb Co. East bank of… | — |
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| Croton alabamensis E.A.Sm. ex Champ. | R. T. Clausen 2706 | 31 Mar 1942 | United States of America | Alabama | Bibb Co. Rocky roadside east… | — |
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| Muscari racemosum (L.) Mill. | R. T. Clausen 5704 | 31 Mar 1942 | United States of America | Alabama | Cullman Co. In field 6.5… | — |
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| Ophioglossum vulgatum L. | R. T. Clausen 5719 | 01 Apr 1942 | United States of America | Alabama | Greene Co. 5 km east… | — |
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| Thelypteris normalis (C.Chr.) Moxley | R. T. Clausen 7362 | 08 Feb 1949 | United States of America | Alabama | Mobile Co. Bank of clay… | — |
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| Selaginella apoda (L.) Spring | R. T. Clausen 5743 | 02 Apr 1942 | United States of America | Alabama | Tuscaloosa Co. First tributary of… | — |
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| Asplenium trichomanes L. | R. T. Clausen 5744 | 02 Apr 1942 | United States of America | Alabama | Tuscaloosa Co. First tributary of… | — |
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| Cerastium fastigiatum Greene | R. T. Clausen 5168 | 25 Aug 1940 | United States of America | Arizona | Santa Cruz Co. along trail… | — |
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| Silene laciniata subsp. greggii (A.Gray) C.L.Hitchc. & Maguire | R. T. Clausen 5161 | 25 Aug 1940 | United States of America | Arizona | Santa Cruz Co. along trail… | — |
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| Galium L. | R. T. Clausen 5158 | 25 Aug 1940 | United States of America | Arizona | Santa Cruz Co. along trail… | — |
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| Verbena ambrosifolia f. eglandulosa L.M.Perry | R. T. Clausen 5175 | 25 Aug 1940 | United States of America | Arizona | Santa Cruz Co. along trail,… | — |
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| Allium cernuum Roth | R. T. Clausen 5165 | 25 Aug 1940 | United States of America | Arizona | Santa Cruz Co. Steep rocky… | — |
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| Pteridium aquilinum var. lanuginosum Bong. | R. T. Clausen 5162 | 25 Aug 1940 | United States of America | Arizona | Santa Cruz Co. Little Shot… | — |
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| Woodsia | R. T. Clausen 5163 | 25 Aug 1940 | United States of America | Arizona | Santa Cruz Co. Along trail… | — |
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| Adiantum pedatum L. | R. T. Clausen 4916 | 21 Jul 1940 | United States of America | California | Mendocino Co. In rich woods… | — |
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| Adiantum pedatum L. | R. T. Clausen 4985 | 28 Jul 1940 | United States of America | California | Siskiyou Co. Rocky slope of… | — |
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| Aspidotis densa (P.Brack) Lellinger | R. T. Clausen 4817 | 06 Jul 1940 | United States of America | California | Tuolumne Co. On granite slope,… | — |
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| Cryptogramma acrostichoides R.Br. | R. T. Clausen 4782 | 30 Jun 1940 | United States of America | California | San Bernardino Co. South side… | — |
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| Myriopteris covillei (Maxon) Á.Löve & D.Löve | R. T. Clausen 4747 | 27 Jun 1940 | United States of America | California | San Bernardino Co. Cascade Canyon,… | — |
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| Myriopteris gracillima D.C. Eaton | R. T. Clausen 4953 | 26 Jul 1940 | United States of America | California | Siskiyou Co. Rocky slope east… | — |
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| Myriopteris parryi (D.C. Eaton) Grusz & Windham | R. T. Clausen 4676 | 18 Jun 1940 | United States of America | California | Riverside Co. About rocks, mouth… | — |
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| Notholaena californica D.C. Eaton | R. T. Clausen 4675 | 18 Jun 1940 | United States of America | California | Riverside Co. About rocks, mouth… | — |
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| Pellaea andromedifolia (Kaulf.) Fée | R. T. Clausen 4746 | 27 Jun 1940 | United States of America | California | San Bernardino Co. Rocky slope… | — |
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| Pellaea andromedifolia (Kaulf.) Fée | R. T. Clausen 4729 | 24 Jun 1940 | United States of America | California | San Luis Obispo Co. Rocky… | — |
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| Pellaea brachyptera (T.Moore) Baker | R. T. Clausen 4808 | 06 Jul 1940 | United States of America | California | Tuolumne Co. Granite outcropping 3… | — |
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| Pellaea bridgesii Hook. | R. T. Clausen 4809 | 06 Jul 1940 | United States of America | California | Tuolumne Co. Granite outcropping about… | — |
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| Pellaea mucronata D.C. Eaton | R. T. Clausen 4767 | 28 Jun 1940 | United States of America | California | San Bernardino Co. Green Canyon,… | — |
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