Displaying 2101 - 2137 out of 2137 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Selaginella bigelovii Underw. | R. T. Clausen 4677 | 18 Jun 1940 | United States of America | California | Riverside Co. Mouth of Chino… | — |
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| Selaginella bigelovii Underw. | R. T. Clausen 4679 | 18 Jun 1940 | United States of America | California | Riverside Co. At mouth of… | — |
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| Selaginella cinerascens A.A.Eaton | R. T. Clausen 4699 | 20 Jun 1940 | United States of America | California | San Diego Co. Sandy field,… | — |
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| Selaginella eremophila Maxon | R. T. Clausen 4678 | 18 Jun 1940 | United States of America | California | Riverside Co. Mouth of Chino… | — |
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| Selaginella oregana D.C. Eaton | R. T. Clausen 4946 | 24 Jul 1940 | United States of America | California | Del Norte Co. Along Smith… | — |
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| Selaginella watsonii Underw. | R. T. Clausen 4818 | 06 Jul 1940 | United States of America | California | Tuolumne Co. 3/4 miles west… | — |
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| Selaginella watsonii Underw. | R. T. Clausen 4825 | 08 Jul 1940 | United States of America | California | Tuolumne Co. Western base of… | — |
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| Isoetes bolanderi Engelm. | R. T. Clausen 4812 | 06 Jul 1940 | United States of America | California | Tuolumne Co. In shallow pool,… | — |
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| Pentagramma triangularis (Kaulf.) Yatsk., Windham & E.Wollenw. subsp. triangularis | R. T. Clausen 4903 | 19 Jul 1940 | United States of America | California | Monterey Co. Dry wooded slope… | — |
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| Pentagramma triangularis (Kaulf.) Yatsk., Windham & E.Wollenw. subsp. triangularis | R. T. Clausen 4728 | 24 Jun 1940 | United States of America | California | San Luis Obispo Co. On… | — |
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| Pentagramma triangularis (Kaulf.) Yatsk., Windham & E.Wollenw. subsp. triangularis | R. T. Clausen 4921 | 21 Jul 1940 | United States of America | California | Mendocino Co. In woods of… | — |
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| Equisetum telmateia Ehrh. | R. T. Clausen 4736 | 24 Jun 1940 | United States of America | California | San Luis Obispo Co. Bank… | — |
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| Equisetum telmateia Ehrh. | R. T. Clausen 4947 | 24 Jul 1940 | United States of America | California | Del Norte Co. Rocky slope… | — |
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| Equisetum L. | R. T. Clausen 4935 | 24 Jul 1940 | United States of America | California | Del Norte Co. In sand… | — |
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| Botrychium simplex E.Hitchc. | R. T. Clausen 4789 | 01 Jul 1940 | United States of America | California | San Bernardino Co. Below (west… | — |
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| Sceptridium multifidum (S.G.Gmel.) M.Nishida | R. T. Clausen 4815 | 06 Jul 1940 | United States of America | California | Tuolumne Co. Northwest of Lake… | — |
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| Polystichum imbricans (D.C. Eaton) D.H.Wagner | R. T. Clausen 4984 | 28 Jul 1940 | United States of America | California | Siskiyou Co. Rocky slope east… | — |
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| Polystichum imbricans (D.C. Eaton) D.H.Wagner | R. T. Clausen 4961 | 26 Jul 1940 | United States of America | California | Siskiyou Co. Rocky slope east… | — |
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| Polystichum munitum var. munitum | R. T. Clausen 4910 | 21 Jul 1940 | United States of America | California | Mendocino Co. About 3 miles… | — |
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| Polystichum munitum var. munitum | R. T. Clausen 4744 | 27 Jun 1940 | United States of America | California | San Bernardino Co. Rocky slope… | — |
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| Dryopteris arguta (Kaulf.) Watt | R. T. Clausen 4913 | 21 Jul 1940 | United States of America | California | Mendocino Co. In woods of… | — |
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| Dryopteris arguta (Kaulf.) Watt | R. T. Clausen 4745 | 27 Jun 1940 | United States of America | California | San Bernardino Co. Rocky slope… | — |
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| Dryopteris arguta (Kaulf.) Watt | R. T. Clausen 4901 | 19 Jul 1940 | United States of America | California | Monterey Co. Wooded slope of… | — |
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| Botrychium simplex E.Hitchc. | R. T. Clausen 4789 | 01 Jul 1940 | United States of America | California | San Bernardino Co. Below (west… | — |
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| Dalea minutifolia (Rydb.) Harms | R. T. Clausen 7434 | 03 May 1949 | Mexico | Hidalgo | Between Real del Monte and… | — |
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| Dalea foliolosa (Aiton) Barneby var. foliolosa | R. T. Clausen 6191 | 01 Oct 1943 | Guatemala | Zacapa | Roadside just north of boundary… | — |
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| Dalea greggii A.Gray | R. T. Clausen 7585 | 18 Apr 1949 | Mexico | Coahuila | On western side of Sierra… | — |
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| Dalea minutifolia (Rydb.) Harms | R. T. Clausen 7499 | 26 Mar 1949 | Mexico | Tlaxcala | On bank of road northwest… | — |
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| Verbascum lychnitis L. | R. T. Clausen 5492 | 02 Aug 1941 | United States of America | New York | Oswego Co. Phillips Point | — |
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| Woodsia scopulina D.C. Eaton | R. T. Clausen 7709 | 14 May 1949 | United States of America | Arkansas | Logan Co. On rocky slope… | — |
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| Woodsia scopulina D.C. Eaton | R. T. Clausen 8257 | 20 Jun 1952 | United States of America | South Dakota | Custer Co. 2.5 km south… | — |
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| Woodsia scopulina D.C. Eaton | R. T. Clausen 5108 | 18 Aug 1940 | United States of America | Utah | Kane Co. Colorado Plateau, Sevier… | — |
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| Woodsia scopulina D.C. Eaton | R. T. Clausen 4851 | 09 Jul 1940 | United States of America | California | Mono Co. In crevices of… | — |
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| Woodsia scopulina D.C. Eaton | R. T. Clausen 651202 | 26 Aug 1965 | United States of America | Washington | Okanogan Co. Steep northwestern slope… | — |
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| Dalea minutifolia (Rydb.) Harms | R. T. Clausen 80-15 | 23 Feb 1980 | Mexico | Hidalgo | On southern side of Barranca… | — |
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| Baccharis conferta Kunth | R. T. Clausen s.n. | 3 Aug 1955 | Mexico | Veracruz | Las Vigas de Ramirez Mun.… | — |
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| Senna skinneri (Benth.) H.S.Irwin & Barneby | R. T. Clausen 6050 | 22 Aug 1943 | Mexico | Guerrero | Along road to Acapulco 2… | — |
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