Displaying 26 - 50 out of 291 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Eutypella juglandicola (Schwein.) Ellis & Everh. | F. Petrak s.n. | 17 May 1950 | United States of America | Maryland | Beltsville. | — |
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| Lophodermium pinicolum Tehon | F. Petrak s.n. | Oct 1950 | United States of America | Maryland | Wälder bei [woods at] Beltsville | — |
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| Lophodermium pinastri (Schrad.:Fr.) Chev. | F. Petrak s.n. | Oct 1950 | United States of America | Maryland | Wälder bei [woods at] Beltsville | — |
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| Guignardia magnoliae (Schwein.) J.H.Mill. | F. Petrak s.n. | May 1950 | United States of America | Maryland | Prince George's Co. | — |
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| Guignardia magnoliae (Schwein.) J.H.Mill. | F. Petrak s.n. | May 1950 | United States of America | Maryland | Prince George's Co. | — |
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| Ophiobolus fulgidus (Cooke & F.Peck) Sacc. | F. Petrak s.n. | Jul 1950 | United States of America | Maryland | Prince George's Co. | — |
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| Ophiobolus fulgidus (Cooke & F.Peck) Sacc. | F. Petrak s.n. | Jul 1950 | United States of America | Maryland | Prince George's Co. | — |
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| Cryptodiaporthe liquidambaris Petr. | F. Petrak s.n. | 17 May, 25 May 1950 | United States of America | Maryland | Prince George's Co. Wälder der… | type | ||||
| Cryptodiaporthe liquidambaris Petr. | F. Petrak s.n. | 25 May 1950 | United States of America | Maryland | Prince George's Co. Wälder der… | type | ||||
| Lophodermium pinastri (Schrad.:Fr.) Chev. | F. Petrak 71578 | 29 May 1950 | United States of America | Maryland | Prince George's Co. Res. Center | — |
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| Cirsium altissimum (L.) Spreng. | F. Petrak 105 | 27. IX.,2.X. 1913 | United States of America | Missouri | Jasper Co. Webb City | — |
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| Lophiostoma salicum (Fabre) Sacc. | F. Petrak s.n. | May 1930 | Czech Republic | Moravia-Silesia | M.-Weisskirchen: [Bucwá-Upr. bei Gomtín]. | — | ||||
| Diaporthe leiphaemia (Fr.) Sacc. | F. Petrak s.n. | 02 Sep 1929 | United States of America | Pennsylvania | Sprow's Run | — |
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| Artemisia longifolia Nutt. | F. Petrak 50103 | 04 Aug 1950 | United States of America | South Dakota | Jackson Co. Badlands National Park,… | — |
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| Solidago missouriensis Nutt. | F. Petrak 50159 | 13 Aug 1950 | United States of America | South Dakota | Custer Co. Near Sylvan Lake;… | — |
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| Solidago ptarmicoides (Nees) B.Boivin | F. Petrak 5011 | 15 Aug 1950 | United States of America | South Dakota | Brown Co. Hill tops, near… | — |
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| Juncus interior Wiegand x J. tenuis Willd. | F. Petrak 50211 | 04 Aug 1950 | United States of America | South Dakota | Pennington Co. Hyw. 16, near… | — |
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| Mentha arvensis var. glabrata (Benth.) Fernald | F. Petrak 50094 | 04 Aug 1950 | United States of America | South Dakota | Near Rockerville in the Black… | — |
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| Betula papyrifera Marshall | F. Petrak 50167 | 13 Aug 1950 | United States of America | South Dakota | Custer Co. In gully below… | — |
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| Arctostaphylos uva-ursi (L.) Spreng. | F. Petrak 50253 | 04 Aug 1950 | United States of America | South Dakota | Custer Co. Woods, roadside, Hwy.… | — |
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| Amorpha nana Nutt. | F. Petrak 50073 | 03 Aug 1950 | United States of America | South Dakota | roadside Hwy 85, south of… | — |
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| Galium boreale L. | F. Petrak 50088 | 04 Aug 1950 | United States of America | South Dakota | Pennington Co. Black Hills | — |
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| Ipomoea leptophylla Torr. | F. Petrak 50249 | 13 Aug 1950 | United States of America | South Dakota | Fall River Co. roadside, Hyw… | — |
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| Geranium viscosissimum Fisch. & C.A.Mey. | F. Petrak 50208 | 05 Aug 1950 | United States of America | South Dakota | Pennington Co. roadside, Hwy 16,… | — |
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| Ambrosia tomentosa Nutt. | F. Petrak 50147 | 04 Aug 1950 | United States of America | South Dakota | Pennington Co. Roadside near Rockerville,… | — |
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