Displaying 1 - 25 out of 2091 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Sedum dendroideum subsp. parvifolium R.T.Clausen | R. T. Clausen 1 | 16 Oct 1955 | Mexico | — | Trans-Mexican Volcanic Belt. On breccia… | isotype |
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| Calamagrostis eriantha (Kunth) Steud. | R. T. Clausen 1 | 24 Oct 1955 | Mexico | — | Western slope of Barranca de… | — |
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| Pellaea ternifolia subsp. arizonica Windham | R. T. Clausen 1 | 15 Sep 1955 | Mexico | Morelos | Tepoztlan Mun. exposure Northeast on… | — |
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| Campyloneurum angustifolium (Sw.) Fée | R. T. Clausen 1 | 09 Nov 1955 | Mexico | — | Río Blanco, 5 km. southwest… | — |
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| Pellaea cordifolia (Sessé & Moc.) A.R.Sm. | R. T. Clausen 1 | 25 Nov 1955 | Mexico | México | Pedregal of San Angel, southwest… | — |
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| Oxylobus arbutifolius (Kunth) A.Gray | R. T. Clausen 1 | 24 Oct 1955 | Mexico | Veracruz | La Perla Mun. on rocky… | — |
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| Myriopteris aurea (Poir.) Grusz & Windham | R. T. Clausen 2 | 03 Aug 1955 | Mexico | Veracruz | Northeast of Cofre de Perote,… | — |
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| Arnica | R. T. Clausen 9 | 26 Sep 1939 | United States of America | New York | Tompkins Co. Cornell University. Cultivated. | — |
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| Arnica chamissonis Less. | R. T. Clausen 19 | 26 Sep 1939 | United States of America | New York | Test garden, Cornell University, Ithaca.… | — |
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| Arnica chamissonis Less. | R. T. Clausen 20 | 24 Jul 1939 | United States of America | New York | Test garden, Cornell University, Ithaca;… | — |
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| Arnica mollis Hook. | R. T. Clausen 30 | 05 Jun 1939 | United States of America | New York | Test garden, Cornell University, Ithaca | — |
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| Athyrium angustum (Willd.) C.Presl | R. T. Clausen 40 | 14 Jun 1931 | United States of America | New Jersey | Passaic Co. Passaic River Watershed.… | — |
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| Sedum obtusatum subsp. retusum (Rose) R.T.Clausen | R. T. Clausen 43-47 | 06 Aug 1947 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Crassula capitella Thunb. | R. T. Clausen 44-54 | 16 Oct 1946 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Sedum greggii Hemsl. | R. T. Clausen 46-18 | 09 Feb 1948 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Sedum lanceolatum Torr. subsp. lanceolatum x S. divergens Greene | R. T. Clausen 46-60 | 15 Jun 1950 | United States of America | New York | Tompkins Co. Test Garden | — |
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| Sedum hemsleyanum Rose | R. T. Clausen 47-3 | 24 Dec 1947 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Sedum greggii Hemsl. | R. T. Clausen 47-27 | 10 Mar 1949 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Sedum moranense Kunth | R. T. Clausen 47-38 | 08 Jun 1950 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Sedum hemsleyanum Rose | R. T. Clausen 47-47 | 05 Feb 1949 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Dudleya pulverulenta (Nutt.) Britton & Rose | R. T. Clausen 47-121 | 27 Feb 1948 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Dudleya attenuata (S.Watson) Moran | R. T. Clausen 47-134 | 21 Apr 1949 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Sedum grandisepalum R.T.Clausen | R. T. Clausen 48-35 | 12 Jan 1951 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Sedum goldmanii (Rose) Moran | R. T. Clausen 48-40 | 24 Nov 1948 | United States of America | New York | Tompkins Co. Greenhouse | — |
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| Sedum griseum Praeger | R. T. Clausen 49-3 | 20 Nov 1949 | United States of America | New York | Tompkins Co. Greenhouse | — |
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