Displaying 226 - 275 out of 291 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Melanops cruenta Petr. | F. Petrak s.n. | 20 May 1926 | Czech Republic | — | Moravia | — |
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| Leptosphaeria caricis-firmae Petr. | F. Petrak s.n. | Jul 1940 | Austria | — | near Innsbruck | type |
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| Leptosphaeria ruthenica Petr. | F. Petrak s.n. | 19 Jul 1918 | Poland | — | "Station Podlesniow in der zentralen… | type |
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| Herpotrichia moravica Petr. | F. Petrak s.n. | Mar 1914 | Czech Republic | — | M. Weisskirchen, Podhorn | type |
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| Spilosticta adeana Petr. | F. Petrak s.n. | Apr 1936 | Czech Republic | — | M. Weisskirchen | possible isotype |
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| Spilosticta adeana Petr. | F. Petrak s.n. | Apr 1936 | Czech Republic | — | M. Weisskirchen | type |
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| Pyrenopeziza geranii Petr. | F. Petrak s.n. | May 1924 | Czech Republic | — | M. Weisskirchen | possible type | ||||
| Phyllosticta scrophulariicola Petr. | F. Petrak s.n. | Aug 1940 | Czech Republic | — | Bohemia. Mähr.-Weisskirchen. Teplitz | type |
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| Phyllosticta gentianae-carpaticae Petr. [ined.] | F. Petrak s.n. | Sep 1924 | Czech Republic | — | Wsetin. Moraviaeastern Moravia | taxon ined. |
![Phyllosticta gentianae-carpaticae Petr. [ined.]](https://sweetgum.nybg.org/images3/1717/705/01097405.thumb.jpg)
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| Hendersonia sisymbrii Petr. | F. Petrak s.n. | 20 May 1918 | Ukraine | — | Galicia (as Galizien): Podluze. Stanislau | type | ||||
| Leptopeltopsis nebulosa Petr. | F. Petrak | — | Czech Republic | — | Moravia, M.-Weisskirchen. Höllenschlucht near Podhorn | — | ||||
| Stagonospora calamagrostidicola Petr. | F. Petrak s.n. | May 1925 | Czech Republic | — | Moravia Hrabuvka, M.-Weisskirchen | type |
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| Pirottaea aconiti Petr. | F. Petrak s.n. | Jul 1939 | Austria | Lower Austria | Niederösterreich (Lower Austria), bei Lunz… | — |
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| Septoria sileris Petr. | F. Petrak s.n. | Jun 1940 | Austria | Lower Austria | Wien Umgebung (Distr.). Wien. Pfaffstätten | type | ||||
| Pyrenopeziza ruttneri Petr. | F. Petrak s.n. | Jul 1939 | Austria | Lower Austria | Niederösterreich. am Durchlaß bei Lunz… | type |
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| Pyrenopeziza soldanellae Petr. | F. Petrak s.n. | May 1943 | Austria | Lower Austria | Niederösterreich. am Durchlaß bei Lunz… | type |
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| Phoma pannonica Petr. | F. Petrak s.n. | May 1939 | Austria | Lower Austria | Niederösterreich. Bisamberg near Vienna | type |
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| Asteromella inulae Petr. | F. Petrak s.n. | Sep 1940 | Austria | Lower Austria | Niederösterreich. Hundsheimerkogel near Hainburg | type | ||||
| Asteromella velata Petr. | F. Petrak s.n. | Sep 1940 | Austria | Lower Austria | Niederösterreich. Hundsheimerkogel near Hainburg | type |
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| Microdiplodia mycophaga Petr. | F. Petrak s.n. | May 1939 | Austria | Lower Austria | Niederösterreich. Hundsheimerkogel near Hainburg | type |
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| Pyrenopeziza austriaca Petr. | F. Petrak s.n. | May 1940 | Austria | Lower Austria | Niederösterreich. Hundsheimerkogel near Hainburg | type |
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| Plenodomus ruttneri Petr. | F. Petrak s.n. | 08 Jun 1943 | Austria | Lower Austria | Niederösterreich. Lunz, Durchlass near Seehof,… | type | ||||
| Septoria vindobonensis Petr. | F. Petrak s.n. | Sep 1940 | Austria | Lower Austria | Niederösterreich. Pfaffenberg, Deutsch-Altenburg | type |
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| Ascochyta vindobonensis Petr. | F. Petrak s.n. | Jun 1940 | Austria | Lower Austria | Niederösterreich. Pfaffstättnerkogel near Baden | type |
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| Coniothyrium massariae Petr. | F. Petrak s.n. | May 1939 | Austria | Lower Austria | Niederösterreich. Vienna, Danube (as Danau-… | type |
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| Pirottaea scabiosicola Petr. | F. Petrak s.n. | 18 Jul 1940 | Austria | Tyrol | Oetztal | — |
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| Didymosphaeria petrakiana Sacc. | F. Petrak s.n. | May 1936 | Czech Republic | — | Moravia Mariental, M.-Weisskirchen | topotype |
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| Mycosphaerella clematidina Petr. | F. Petrak s.n. | May 1939 | Austria | — | Pfaffstatten near Baden | type |
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| Micromphale perforans (Hoffm.) Gray | F. Petrak 309 | Aug 1923 | Germany | — | [Illegible precise loc.] | — |
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| Panellus stypticus (Bull.:Fr.) P.Karst. | F. Petrak 252 | Aug 1922 | Germany | — | [Illegible precise loc.] | — |
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| Achillea millefolium L. | F. Petrak 50012 | 7. VIII | United States of America | Wyoming | Brooklyn Lake | — |
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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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| Artemisia scopulorum A.Gray | F. Petrak 50119 | 07 Aug 1950 | United States of America | Wyoming | Albany Co. shore of Brooklyn… | — |
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| Oxytropis campestris var. gracilis (A.Nelson) Barneby | F. Petrak 50029 | 09 Aug 1950 | United States of America | Wyoming | Carbon Co. At Lake Marie,… | — |
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| Oxytropis lambertii Pursh | F. Petrak 50153 | 08 Aug 1950 | United States of America | Wyoming | Albany Co. border of woodsat… | — |
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| Chamaerhodos erecta (L.) Bunge | F. Petrak 50053 | 12 Aug 1950 | United States of America | Wyoming | Albany Co. Roadside, Hwy. 30,… | — |
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| Delphinium geyeri Greene | F. Petrak 50148 | 05 Aug 1950 | United States of America | Colorado | Weld Co. Near Rockport | — |
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| Geum rossii var. turbinatum (Rydb.) C.L.Hitchc. | F. Petrak 50008 | 09 Jul 1950 - 09 Aug 1950 | United States of America | Wyoming | Brooklyn Lake | — |
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| Potentilla fruticosa L. | F. Petrak 50046 | 11 Aug 1950 | United States of America | Wyoming | Albany Co. Near the University… | — |
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| Potentilla glandulosa subsp. pseudorupestris (Rydb.) D.D.Keck | F. Petrak 50209 | 04 Aug 1950 | United States of America | South Dakota | Pennington Co. Roadside, Hwy. alt.… | — |
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| Potentilla hippiana Lehm. | F. Petrak 50047 | 10 Aug 1950 | United States of America | Wyoming | Albany Co. 1/4 m. above… | — |
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| Heterotheca hirsutissima G.L.Nesom | F. Petrak 50144 | 03 Aug 1950 | United States of America | South Dakota | Jackson Co. Roadside, Hwy 16,… | — |
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| Hieracium gracile Hook. | F. Petrak 50194 | 09 Aug 1950 | United States of America | Wyoming | Albany Co. Meadow at Lake… | — |
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| Hymenoxys acaulis (Pursh) K.F.Parker | F. Petrak 50049 | 12 Aug 1950 | United States of America | Wyoming | Albany Co. [illegible] Buford | — |
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| Townsendia grandiflora Nutt. | F. Petrak 50151 | 06 Aug 1950 | United States of America | Wyoming | Roadside, Hwy. between Fillmore &… | — |
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| Eriogonum arcuatum Greene var. arcuatum | F. Petrak 50207 | 05 Aug 1950 | United States of America | Colorado | Roadside, near Longmont | — |
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| Senecio crassulus A.Gray | F. Petrak 50133 | 08 Aug 1950 | United States of America | Wyoming | Shore of Nash Fork Creek,… | — |
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| 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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| Pseudoperonospora humuli (Miyabe & Takah.) G.W.Wilson | F. Petrak s.n. | Aug 1940 | Czech Republic | — | Moravia orient: Teplitz prope urbem… | — | ||||
| Pseudoperonospora humuli (Miyabe & Takah.) G.W.Wilson | F. Petrak 421 | Sep 1925 | Germany | — | Mittelfranken, Kr. Hersbruck: Hersbruck, am… | — |