Displaying 1 - 25 out of 53 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Albugo candida (Pers.) Roussel | A. V. Osmun 1 | 06 May 1916 | United States of America | Massachusetts | Holyoke Mountains. | — | 2771118 |
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| Botryosphaeria quercuum (Schwein.) Sacc. | A. V. Osmun 3136 | 01 Feb 1929 | United States of America | Massachusetts | Hampshire Co. | — | 2980459 |
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| Botryosphaeria quercuum (Schwein.) Sacc. | A. V. Osmun 2556 | 21 Mar 1919 | United States of America | Massachusetts | Hampshire Co. | — | 2980460 |
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| Bremia lactucae Regel | A. V. Osmun 2554 | 14 Mar 1919 | United States of America | Massachusetts | Crosby's Greenhouse, Arlington | — | 1959343 |
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| Bremia lactucae Regel | A. V. Osmun 2555 | 14 Mar 1919 | United States of America | Massachusetts | Wyman Bros. Greenhouse, Arlington | — | 1959344 |
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| Climacocystis borealis (Fr.) Kotl. & Pouzar | A. V. Osmun 3081 | 13 Oct 1926 | United States of America | Massachusetts | Franklin Co. Mt. Toby, Leverett | — | 1768900 |
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| Colletotrichum lagenarium (Pass.) Ellis & Halst. | A. V. Osmun 2181 | 18 May 1917 | United States of America | Massachusetts | Middlesex Co. | — | 3445913 |
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| Corallorhiza maculata (Raf.) Raf. var. maculata | A. V. Osmun 6 | 27 Aug 1903 | United States of America | Connecticut | Litchfield Co. Salisbury | — | 4027723 |
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| Cyathus stercoreus (Schwein.) De Toni | A. V. Osmun 2185 | 05 Jun 1917 | United States of America | Massachusetts | Franklin Co. Sunderland. | — | 1967806 |
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| Erysiphe cichoracearum | A. V. Osmun s.n. | 1910 | United States of America | Connecticut | Simsbury | — | 2937190 |
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| Erysiphe cichoracearum | A. V. Osmun 2505 | 04 Oct 1918 | United States of America | Massachusetts | Hampshire Co. | — | 2937634 |
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| Erysiphe cichoracearum | A. V. Osmun 2658 | 01 Sep 1919 | United States of America | Massachusetts | Hampshire Co. Clark Hall greenhouse | — | 2937649 |
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| Erysiphe cichoracearum | A. V. Osmun 2838 | Jul 1921 | United States of America | Massachusetts | Franklin Co. | — | 2937659 |
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| Erysiphe graminis DC. | A. V. Osmun 2559 | Jul 1918 | United States of America | Massachusetts | Hampshire Co. | — | 2938594 |
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| Erysiphe graminis DC. | A. V. Osmun 2593 | 28 May 1910 | United States of America | Massachusetts | Hampshire Co. | — | 2938595 |
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| Erysiphe polygoni DC. | A. V. Osmun s.n. | 04 Mar 1943 | United States of America | Massachusetts | Hampshire Co. Clark Hall Greenhouse | — | 2939365 |
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| Erysiphe polygoni DC. | A. V. Osmun s.n. | Oct 1910 | United States of America | Massachusetts | Hampshire Co. | — | 2939369 |
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| Gymnosporangium clavipes Cooke & Peck | A. V. Osmun 3432 | 14 Jul 1944 | United States of America | Massachusetts | Hampshire Co. Clark Hall, M.… | — | 3011008 |
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| Gymnosporangium juniper-virginianae Schwein. | A. V. Osmun s.n. | Sep 1913 | United States of America | Connecticut | Hartford Co. | — | 3010693 |
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| Gymnosporangium juniper-virginianae Schwein. | A. V. Osmun 28888 | 10 Aug 1922 | United States of America | Massachusetts | Franklin Co. | — | 3010820 |
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| Gymnosporangium juniper-virginianae Schwein. | A. V. Osmun s.n. | 04 Aug 1920 | United States of America | Virginia | — | 3010958 |
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| Inonotus cuticularis (Bull.:Fr.) P.Karst. | A. V. Osmun 2738 | 28 Oct 1919 | United States of America | Massachusetts | Hampshire Co. Amherst | — | 3026913 |
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| Microsphaera penicillata (Wallr.:Fr.) Lév. | A. V. Osmun | 01 Aug 1925 | United States of America | Massachusetts | Mt. Toby | — | 2941647 |
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| Microsphaera penicillata (Wallr.:Fr.) Lév. | A. V. Osmun | 02 Aug 1924 | United States of America | Massachusetts | North Sunderland | — | 2941830 |
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| Peronospora effusa (Grev.) Tul. | A. V. Osmun 2441 | 16 Jul 1918 | United States of America | Massachusetts | Hampshire Co. Amherst | — | 1960166 |
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