Displaying 1 - 25 out of 232 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Puccinia montanensis Ellis | J. C. Arthur 3001 | 19 Sep 1911 | United States of America | Colorado | Boulder | — | 292568 | ||
| Dasyscyphus arida (W.Phillips) Sacc. | J. C. Arthur s.n. | — | United States of America | Colorado | Ouray. | — | 1720803 |
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| Cirsium scariosum Nutt. | J. C. Arthur 5004 | 01 Aug 1912 | United States of America | Colorado | Ridgeway. | — | 2053197 |
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| Cytidia salicina (Fr.) Burt | J. C. Arthur s.n. | 20 Aug 1912 | United States of America | Colorado | Gilpin Co. Tolland | — | 01992061 |
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| Cytidia salicina (Fr.) Burt | J. C. Arthur s.n. | 20 Aug 1912 | United States of America | Colorado | Gilpin Co. Tolland | — | 1992062 |
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| Xanthium strumarium var. canadense (Mill.) Torr. & A.Gray | J. C. Arthur 2606 | 14 Sep 1911 | United States of America | Colorado | Pueblo Co. Lake Minnequa | — | 3199870 |
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| Xanthium strumarium var. canadense (Mill.) Torr. & A.Gray | J. C. Arthur 2604 | 14 Sep 1911 | United States of America | Colorado | Pueblo Co. Lake Minnequa | — | 3199872 |
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| Botrychium simplex E.Hitchc. | J. C. Arthur 2 | 29 Jul 1912 | United States of America | Colorado | Ouray Co. Wooded slopes east… | — | 3526140 |
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| Clematis orientalis L. | J. C. Arthur 1 | 31 Jul 1912 | United States of America | Colorado | Ouray Co. | — | 2746015 |
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| Packera neomexicana var. mutabilis (Greene) W.A.Weber & Á.Löve | J. C. Arthur 3 | 26 Jul 1912 | United States of America | Colorado | Ouray Co. | — | 3117535 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — | 01960370 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — | 1960371 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — | 1960372 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur s.n. | Jul 1883 | United States of America | Illinois | Near Chicago | — | 1960373 |
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| Peronospora effusa (Grev.) Tul. | J. C. Arthur 118 | 14 Jul 1883 | United States of America | Illinois | Chicago | — | 1960422 |
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| Phellinus everhartii (Ellis & Galloway) A.Ames | J. C. Arthur 22 | 06 Apr 1907 | United States of America | Illinois | Lake Co. Lake Forest | — | 3025864 |
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| Puccinia mariae-wilsoniae Clinton | J. C. Arthur s.n. | 02 Jun 1883 | United States of America | Illinois | Cook Co. | — | 3408757 |
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| Uromyces euphorbiae Cooke & Peck | J. C. Arthur s.n. | 11 Oct 1883 | United States of America | Illinois | Cook Co. Ravenswood near Chicago. | — | 3438616 |
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| Puccinia ranunculi Seym. | J. C. Arthur | 02 Jun 1883 | United States of America | Illinois | Chicago. Riverside | type | 12830 |
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| Entyloma microsporum (Unger) Schroet. | J. C. Arthur s.n. | July, [illegible] | United States of America | Illinois | Near Chicago | — | 3022880 |
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| Puccinia amphigena Dietel | J. C. Arthur s.n. | 18 Mar 1899 | United States of America | Illinois | Chicago | — | 3005882 |
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| Puccinia amphigena Dietel | J. C. Arthur s.n. | 11 Oct 1883 | United States of America | Illinois | Cook Co. | — | 3005883 |
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| Puccinia amphigena Dietel | J. C. Arthur s.n. | 18 Mar 1899 | United States of America | Illinois | Cook Co. | — | 3005885 |
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| Puccinia bolleyana Sacc. | J. C. Arthur | 11 Mar 1899 | United States of America | Indiana | Tippecanoe Co. | — | 257105 | ||
| Puccinia windsoriae Schwein. | J. C. Arthur | 29 Sep 1898 | United States of America | Indiana | Tippecanoe Co. | — | 310020 |