Displaying 1 - 25 out of 2261 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Abietinella abietina (Hedw.) M.Fleisch. | W. A. Weber | 25 May 1997 | United States of America | Colorado | Boulder Co. Rocky Mountain Front… | — | ||||
| Abietinella abietina (Hedw.) M.Fleisch. | W. A. Weber 10320 | 29 Jul 1956 | United States of America | Alaska | Mt. McKinley National Park; southwest… | — | ||||
| Abietinella abietina (Hedw.) M.Fleisch. | W. A. Weber 10320 | 29 Jul 1956 | United States of America | Alaska | Mt. McKinley National Park; southwest… | — | ||||
| Abietinella abietina (Hedw.) M.Fleisch. | W. A. Weber E | 27 May 2000 | United States of America | Colorado | Larimer Co. Big Thompson Canyon,… | — | ||||
| Acacia angustissima var. texensis (Torr. & A.Gray) Isely | W. A. Weber 12851 | 10 Jul 1965 | United States of America | New Mexico | Grant Co. in vacant lots | — |
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| Acarospora | W. A. Weber S-26755 | 26 Jun 1960 | United States of America | New Mexico | Lincoln Co. Dakota Ridge, 1.5… | — |
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| Acarospora boulderensis H.Magn. | W. A. Weber | 01 Mar 1961 | United States of America | Colorado | Boulder Co. base of "Flatirons",… | — |
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| Acarospora nitida H.Magn. | W. A. Weber | M. Klockenbrink | M. Finucane s.n. | 15 Jul 1976 | United States of America | Colorado | Larimer Co. Rocky Mountain National… | — |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | W. A. Weber 5 | 25 May 1979 | United States of America | Colorado | Mesa Co. Along old Highway… | — |
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| Achnatherum richardsonii (Link) Barkworth | W. A. Weber 2572 | 24 Jul 1941 | Canada | British Columbia | Along the Cariboo road 31… | — |
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| Achnatherum x bloomeri (Bol.) Barkworth | W. A. Weber 1901 | 25 May 1979 | United States of America | Colorado | Mesa Co. Along old Highway… | — |
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| Agoseris aurantiaca (Hook.) Greene var. aurantiaca | W. A. Weber 2346 | 07 Jul 1941 | Canada | British Columbia | Moist grassy meadow west of… | — |
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| Agoseris aurantiaca (Hook.) Greene var. aurantiaca | W. A. Weber 12601 | 25 Jun 1965 | United States of America | Colorado | Moffat Co. Whisky Springs Ranch,… | — |
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| Agoseris glauca var. dasycephala (Torr. & A.Gray) Jeps. | W. A. Weber 2401 | 1941 Jul 10 | Canada | Alberta | 6 miles west of Banff | — |
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| Agrostis stolonifera L. | W. A. Weber 2532 | 20 Jul 1941 | Canada | British Columbia | Between the wood and canoe… | — |
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| Aletes anisatus (A.Gray) W.L.Theob. & C.C.Tseng | W. A. Weber 17804 | 08 Jul 1986 | United States of America | Colorado | Rio Blanco Co. Piceance Creek… | — |
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| Aletes humilis J.M.Coult. & Rose | W. A. Weber 12393 | 09 Jun 1965 | United States of America | Colorado | Larimer Co. Dale Creek at… | — |
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| Aliciella pentstemonoides (M.E.Jones) J.M.Porter | W. A. Weber 9356 | 27 Jul 1955 | United States of America | Colorado | Gunnison Co. rimrock of Blue… | — |
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| Allium brandegeei S.Watson | W. A. Weber 12489 | 23 Jun 1965 | United States of America | Colorado | Routt Co. valley between Hahn's… | — |
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| Allium textile A.Nelson & J.F.Macbr. | W. A. Weber 3129 | 07 May 1982 | United States of America | Colorado | Mesa Co. East part of… | — |
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| Alnus incana subsp. tenuifolia (Nutt.) Breitung | W. A. Weber 2238 | 02 Jul 1941 | Canada | British Columbia | Open Lodgepole Pine forest along… | — |
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| Alnus oblongifolia Torr. | W. A. Weber 12844 | 10 Jul 1965 | United States of America | New Mexico | Catron Co. Foothills of Mogollon… | — |
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| Aloina rigida (Hedw.) Limpr. | W. A. Weber B-43364 | 22 May 1973 | United States of America | Colorado | Weld Co. Pawnee Buttes, north… | — | ||||
| Alopecurus aequalis Sobol. | W. A. Weber 2569 | 24 Jul 1941 | Canada | British Columbia | On the edge of an… | — |
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| Alyssum desertorum Stapf | W. A. Weber 12428 | 21 Jun 1965 | United States of America | Colorado | Jackson Co. roadside borrow; primitive… | — |
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