Displaying 1 - 25 out of 675 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Abronia fragrans Nutt. ex Hook. | R. K. Gierisch 917 | 04 Jun 1939 | United States of America | Colorado | Denver Co. Denver Airport | — |
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| Abutilon parvulum A.Gray | R. K. Gierisch 4391 | 08 Jun 1978 | United States of America | Arizona | Mohave Co. St. George. Navajo… | — |
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| Acer glabrum var. diffusum (Greene) Smiley | R. K. Gierisch s.n. | 27 Aug 1936 | United States of America | Utah | Iron Co. | — |
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| Acer glabrum var. neomexicanum (Greene) Kearney & Peebles | R. K. Gierisch 1104 | 02 Aug 1939 | United States of America | Colorado | Saguache Co. Rio Grande National… | — |
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| Acer negundo var. interius (Britton) Sarg. | R. K. Gierisch s.n. | 27 Aug 1936 | United States of America | Utah | Iron Co. | — |
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| Achillea millefolium L. | R. K. Gierisch 696 | 07 Jul 1938 | United States of America | Idaho | Twin Falls Co. Minidoka Forest. | — |
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| Achillea millefolium L. | R. K. Gierisch 1263 | 14 Jul 1940 | United States of America | Colorado | Lake Co. Cochetopa Forest, Weston… | — |
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| Achnatherum coronatum (Thurb.) Barkworth | R. K. Gierisch 314 | 21 Jun 1937 | United States of America | Utah | Coal Hill Ridge, Dixie Nat'l… | — |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | R. K. Gierisch 1079 | 21 Jul 1939 | United States of America | Colorado | Rio Grande Co. East fork… | — |
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| Achnatherum lettermanii (Vasey) Barkworth | R. K. Gierisch 1314 | 25 Jul 1940 | United States of America | Colorado | Lake Co. Tennessee Pass Ranger… | — |
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| Aconitum columbianum Nutt. var. columbianum | R. K. Gierisch 1109 | 12 Aug 1939 | United States of America | Colorado | Saguache Co. Rio Grande National… | — |
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| Agrostis exarata Trin. | R. K. Gierisch 1083 | 02 Aug 1939 | United States of America | Colorado | Saguache Co. Rio Grande National… | — |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | R. K. Gierisch 87 | 27 Jul 1939 | United States of America | Utah | Summit Co. Wasatch National Forest,… | — |
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| Aliciella leptomeria (A.Gray) J.M.Porter | R. K. Gierisch 415 | 18 Jun 1937 | United States of America | Utah | Washington Co. Pine Valley Mountains,… | — |
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| Allium cernuum Roth | R. K. Gierisch 107 | 14 Jul 1936 | United States of America | Utah | Garfield Co. knoll | — |
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| Allium cernuum Roth | R. K. Gierisch 1087 | 02 Aug 1939 | United States of America | Colorado | Saguache Co. La Garita Creek.… | — |
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| Allium geyeri var. tenerum M.E.Jones | R. K. Gierisch 1048 | 03 Jul 1939 | United States of America | Colorado | Rio Grande Co. Rio Grande… | — |
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| Alopecurus aequalis Sobol. | R. K. Gierisch 1085 | 02 Aug 1939 | United States of America | Colorado | Saguache Co. Rio Grande National… | — |
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| Amaranthus blitoides S.Watson | R. K. Gierisch 8 | 18 Sep 1938 | United States of America | Idaho | Twin Falls Co. 4 miles… | — |
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| Amaranthus powellii S.Watson | R. K. Gierisch s.n. | 18 Sep 1938 | United States of America | Idaho | Twin Falls Co. 4 miles… | — |
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| Amsonia eastwoodiana Rydb. | R. K. Gierisch 4162 | 07 Apr 1978 | United States of America | Arizona | Coconino Co. Vic. Vermillion Ldg[?] | — |
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| Anaphalis margaritacea (L.) Benth. & Hook.f. | R. K. Gierisch 1335 | 09 Aug 1940 | United States of America | Colorado | Lake Co. Vicinity of Carlton… | — |
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| Androsace septentrionalis L. | R. K. Gierisch 909 | 21 May 1939 | United States of America | Colorado | Jefferson Co. Near Denver, along… | — |
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| Androsace septentrionalis L. | R. K. Gierisch 895 | 07 May 1939 | United States of America | Colorado | Jefferson Co. Vicinity of Red… | — |
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| Anemone multifida Poir. | R. K. Gierisch 1229 | 02 Jun 1940 | United States of America | Colorado | Clear Creek Co. Arapaho National… | — |
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