Displaying 1 - 50 out of 675 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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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 | — | 3370457 |
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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… | — | 52547 |
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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. | — | 1002629 |
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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… | — | 2484263 |
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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. | — | 1002824 |
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| Achillea millefolium L. | R. K. Gierisch 1263 | 14 Jul 1940 | United States of America | Colorado | Lake Co. Cochetopa Forest, Weston… | — | 1824866 |
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| Achillea millefolium L. | R. K. Gierisch 696 | 07 Jul 1938 | United States of America | Idaho | Twin Falls Co. Minidoka Forest. | — | 1824932 |
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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… | — | 1486707 |
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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… | — | 1553317 |
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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… | — | 1487233 |
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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… | — | 2727044 |
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| Agrostis exarata Trin. | R. K. Gierisch 1083 | 02 Aug 1939 | United States of America | Colorado | Saguache Co. Rio Grande National… | — | 1555368 |
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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,… | — | 1556013 |
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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,… | — | 00964617 |
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| Allium cernuum Roth | R. K. Gierisch 107 | 14 Jul 1936 | United States of America | Utah | Garfield Co. knoll | — | 3762581 |
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| Allium cernuum Roth | R. K. Gierisch 1087 | 02 Aug 1939 | United States of America | Colorado | Saguache Co. La Garita Creek.… | — | 3762696 |
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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… | — | 3763321 |
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| Alopecurus aequalis Sobol. | R. K. Gierisch 1085 | 02 Aug 1939 | United States of America | Colorado | Saguache Co. Rio Grande National… | — | 1637777 |
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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… | — | 3363339 |
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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… | — | 01012587 |
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| Amsonia eastwoodiana Rydb. | R. K. Gierisch 4162 | 07 Apr 1978 | United States of America | Arizona | Coconino Co. Vic. Vermillion Ldg[?] | — | 4160817 |
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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… | — | 1889006 |
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| Androsace septentrionalis L. | R. K. Gierisch 909 | 21 May 1939 | United States of America | Colorado | Jefferson Co. Near Denver, along… | — | 3592545 |
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| Androsace septentrionalis L. | R. K. Gierisch 895 | 07 May 1939 | United States of America | Colorado | Jefferson Co. Vicinity of Red… | — | 3592558 |
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| Anemone multifida Poir. | R. K. Gierisch 1229 | 02 Jun 1940 | United States of America | Colorado | Clear Creek Co. Arapaho National… | — | 2739418 |
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| Anemone multifida Poir. var. multifida | R. K. Gierisch 1220 | 19 May 1940 | United States of America | Colorado | Clear Creek Co. Arapaho National… | — | 2739677 |
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| Anemone patens L. | R. K. Gierisch 913 | 21 May 1939 | United States of America | Colorado | Clear Creek Co. Along Colorado… | — | 2740246 |
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| Anemone patens L. | R. K. Gierisch 864 | 22 Apr 1939 | United States of America | Colorado | Park Co. 1 mile east… | — | 2740247 |
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| Anemone patens L. | R. K. Gierisch 877 | 30 Apr 1939 | United States of America | Colorado | Boulder Co. 1 mile West… | — | 2740250 |
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| Angelica pinnata S.Watson | R. K. Gierisch 995 | 01 Jul 1939 | United States of America | Colorado | Rio Grande Co. Monte Vista,… | — | 3366142 |
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| Antennaria parvifolia Nutt. | R. K. Gierisch 961 | 11 Jun 1939 | United States of America | Colorado | Hinsdale Co. Rio Grande National… | — | 1878741 |
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| Antennaria parvifolia Nutt. | R. K. Gierisch 885 | 30 Apr 1939 | United States of America | Colorado | Boulder Co. 1 mi W… | — | 1878791 |
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| Anthoxanthum nitens (Weber) Y.Schouten & Veldkamp | R. K. Gierisch 1272 | 14 Jul 1940 | United States of America | Colorado | Lake Co. Weston Pass | — | 1641165 |
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| Anticlea elegans (Pursh) Rydb. | R. K. Gierisch 1018 | 03 Jul 1939 | United States of America | Colorado | Conejos Co. 1 mile East… | — | 3688311 |
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| Aquilegia elegantula Greene | R. K. Gierisch 945 | 11 Jun 1939 | United States of America | Colorado | Mineral Co. Rio Grande National… | — | 2742105 |
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| Arceuthobium americanum Nutt. ex Engelm. | R. K. Gierisch 1247 | 09 Jun 1940 | United States of America | Colorado | Grand Co. Arapaho National Forest,… | — | 3705720 |
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| Arctostaphylos uva-ursi (L.) Spreng. | R. K. Gierisch 1257 | 06 Jul 1940 | United States of America | Colorado | Lake Co. Low Pass Creek,… | — | 2518020 |
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| Arctostaphylos uva-ursi (L.) Spreng. | R. K. Gierisch 1217 | 19 May 1940 | United States of America | Colorado | Clear Creek Co. Arapaho National… | — | 2520467 |
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| Arctostaphylos uva-ursi (L.) Spreng. | R. K. Gierisch 886 | 30 Apr 1939 | United States of America | Colorado | Boulder Co. 8 mi N… | — | 2520468 |
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| Arenaria fendleri A.Gray var. fendleri | R. K. Gierisch 1305a | 14 Jul 1940 | United States of America | Colorado | Lake Co. Weston Pass | — | 3233983 |
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| Arenaria fendleri A.Gray var. fendleri | R. K. Gierisch 1137 | 12 Aug 1939 | United States of America | Colorado | Saguache Co. Rio Grande National… | — | 3234066 |
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| Argemone munita var. rotundata (Rydb.) Shinners | R. K. Gierisch s.n. | 18 Jun 1937 | United States of America | Utah | Washington Co. Pine Valley Mountains | — | 497936 |
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| Argyrochosma fendleri Windham | R. K. Gierisch 1222 | 24 May 1940 | United States of America | Colorado | Clear Creek Co. near bottom… | — | 3483913 |
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| Argyrochosma fendleri Windham | R. K. Gierisch 1222 | 24 May 1940 | United States of America | Colorado | Clear Creek Co. | — | 3483952 |
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| Aristida purpurea var. fendleriana (Steud.) Vasey | R. K. Gierisch 1202 | 24 Aug 1939 | United States of America | Colorado | Saguache Co. Mouth of Rito… | — | 1632201 |
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| Aristida purpurea var. fendleriana (Steud.) Vasey | R. K. Gierisch 924 | 10 Jun 1939 | United States of America | Colorado | Rio Grande Co. 7 miles… | — | 1632202 |
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| Arnica chamissonis Less. | R. K. Gierisch 715 | 17 Jul 1938 | United States of America | Idaho | Twin Falls Co. Shoshone R.S. | — | 1870733 |
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| Arnica cordifolia Hook. | R. K. Gierisch 617 | 15 Jun 1938 | United States of America | Idaho | Twin Falls Co. Minidoka | — | 1871168 |
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| Arnica cordifolia Hook. | R. K. Gierisch 617 | 15 Jun 1938 | United States of America | Idaho | Twin Falls Co. On n.w.… | — | 1871174 |
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| Arnica cordifolia Hook. | R. K. Gierisch 946 | 11 Jun 1939 | United States of America | Colorado | Clear Creek Co. North slope… | — | 1881263 |
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