Displaying 826 - 850 out of 919 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Cetraria aculeata var. alpina Schaer. | T. A. Williams s.n. | 01 Aug 1898 | United States of America | Wyoming | Bull Camp, headwaters of Crazy… | — | 4440557 |
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| Lecanora chlorophana (Wahlenb.) Ach. | T. A. Williams s.n. | 27 Jul 1897 | United States of America | — | Belle Fourche River, at Egge's… | — | 04440085 |
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| Arthonia quintaria Nyl. | T. A. Williams s.n. | Oct 1897 - Dec 1897 | United States of America | District of Columbia | Takoma Park. | — | 4440100 |
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| Biatora uliginosa (Schrad.) Fr. | T. A. Williams s.n. | May 1897 | United States of America | District of Columbia | Takoma Park. | — | 4440103 |
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| Pannaria leucosticta Tuck. | T. A. Williams s.n. | Dec 1897 | United States of America | Maryland | Montgomery Co. Sligo Creek. | — | 4440102 |
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| Pannaria molybdaea var. cronia (Tuck.) | T. A. Williams s.n. | Dec 1897 | United States of America | Maryland | Montgomery Co. Sligo Creek. | — | 4440105 |
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| Rinodina turfacea (Wahlenb.) Körb. | T. A. Williams s.n. | 18 Aug 1897 | United States of America | Wyoming | Ten Sleep Lakes, Big Horn… | — | 4440095 |
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| Lecidea atrobrunnea (Lam. & DC.) Schaer. | T. A. Williams s.n. | 10 Aug 1897 | United States of America | Wyoming | Meeteetse Creek. | — | 4440101 |
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| Cetraria aculeata var. alpina Schaer. | T. A. Williams s.n. | 02 Aug 1897 | United States of America | Wyoming | Bull Camp, headwaters of Crazy… | — | 4440104 |
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| Lecidea atrobrunnea (Lam. & DC.) Schaer. | T. A. Williams s.n. | 10 Aug 1897 | United States of America | Wyoming | Meeteetse Creek. | — | 4510931 |
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| Opegrapha varia Pers. | T. A. Williams s.n. | 26 Apr 1891 | United States of America | South Dakota | Brookings Co. Brookings. | — | 1391669 |
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| Candelaria concolor (Dicks.) Stein | T. A. Williams s.n. | Apr 1895 | United States of America | South Dakota | Brookings Co. Brookings. | — | 1407188 |
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| Mycomicrothelia macularis (Hampe & A.Massal.) Keissl. | T. A. Williams s.n. | 29 Nov 1895 | United States of America | Nebraska | Cass Co. Weeping Water. | — | 1076165 |
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| Mycomicrothelia macularis (Hampe & A.Massal.) Keissl. | T. A. Williams s.n. | 29 Nov 1895 | United States of America | Nebraska | Cass Co. Weeping Water. | — | 1076166 |
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| Lichinella cribellifera (Nyl.) P.P.Moreno & Egea | T. A. Williams s.n. | Nov 1895 | United States of America | Nebraska | Cass Co. Weeping Water. | — | 1399141 |
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| Thyrea confusa Henssen | T. A. Williams s.n. | Nov 1895 | United States of America | Nebraska | Cass Co. Weeping Water. | — | 1399178 |
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| Lecanora saligna (Schrad.) Zahlbr. | T. A. Williams s.n. | Nov 1895 | United States of America | Nebraska | Cass Co. Weeping Water. | — | 1548142 |
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| Placidium lacinulatum (Ach.) Breuß | T. A. Williams s.n. | Jan 1896 | United States of America | Nebraska | Lancaster Co. Lincoln. | — | 1394295 |
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| Ramalina pollinaria (Westr.) Ach. | T. A. Williams s.n. | Sep 1894 | United States of America | South Dakota | Minnehaha Co. Dell Rapids. | — | 1544880 |
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| Ramalina pollinaria (Westr.) Ach. | T. A. Williams s.n. | Sep 1894 | United States of America | South Dakota | Minnehaha Co. Dell Rapids. | — | 1544881 |
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| Collema ryssoleum (Tuck.) A.Schneid. | T. A. Williams s.n. | Jun 1897 | United States of America | Maryland | Montgomery Co. Sligo Creek. | — | 1490644 |
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| Cladonia parasitica (Hoffm.) Hoffm. | T. A. Williams s.n. | 01 May 1897 | United States of America | District of Columbia | Rock Creek Park. | — | 1534414 |
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| Xanthoparmelia chlorochroa (Tuck.) Hale | T. A. Williams s.n. | 20 Jun 1890 | United States of America | Nebraska | Near War Bonnet Canon, northwest… | — | 1610546 |
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| Buellia chloroleuca Körb. | T. A. Williams s.n. | 19 Aug 1897 | United States of America | Wyoming | Ten Sleep Lakes, Big Horn… | — | 1612358 |
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| Fuscopannaria leucosticta (Tuck.) P.M.Jørg. | T. A. Williams s.n. | Dec 1897 | United States of America | Maryland | Montgomery Co. Sligo Creek. | — | 1516777 |
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