Displaying 1 - 50 out of 291 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Cirsium lappaceum var. ramosum Petr. | F. Petrak s.n. | Jul 1912-1915 | Czech Republic | — | E seminibus a cl. G.… | possible type |
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| Cirsium sychnosanthum Petr. | F. Petrak s.n. | Jun 1914-Jul 1914 | Czech Republic | — | E seminibus plantae loco indicato… | possible type |
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| Penstemon rydbergii A.Nelson var. rydbergii | F. Petrak 50006 | 08 Aug 1950 | United States of America | Wyoming | Highway 150, above University Summer… | — |
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| Solanum triflorum Nutt. | F. Petrak 50158 | 03 Aug 1950 | — | — | [Illegible] - Tal bis [illegible];… | — |
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| Solanum dulcamara L. | F. Petrak s.n. | Jul 1911 | Czech Republic | — | Cres??: M. Weisskirchen Wiesengräben bei… | — | ||||
| Solanum nigrum L. | F. Petrak 676 | Aug 1911 | Czech Republic | — | Mähr Weisskirchen: Schuttplötze an der… | — | ||||
| Dasyscyphus willkommii (Hartig) Rehm | F. Petrak s.n. | V. 1922 | Czech Republic | — | West Beskiden | — |
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| Trichopeziza brevipila (Roberge ex Desm.) Sacc. | F. Petrak s.n. | V. 1924 | Czech Republic | — | Moravia, Weisskirchen, | — |
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| Arnica cordifolia Hook. | F. Petrak 50129 | Aug. 8 .950 | United States of America | Wyoming | Albany Co. Nash Fork Creek,… | — |
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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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| Macrodiplodiopsis desmazieri (Mont.) Petr. | F. Petrak s.n. | Oct 1940 | Czech Republic | — | MoraviaMährisch-Weißkirchen, Parkanlagen | — |
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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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| Cirsium brevistylum Cronquist | F. Petrak 46 | 27 May 1911 | United States of America | California | San Bernardino Co. | — |
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| Erigeron caespitosus Nutt. | F. Petrak 50030 | 09 Aug 1950 | United States of America | Wyoming | Albany Co. shore of North… | — |
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| Erigeron divergens var. divergens | F. Petrak 50086 | 04 Aug 1950 | United States of America | Wyoming | Goshen Co. [illegible] Lusk and… | — |
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| Craterellus cornucopioides (L.) Pers. | F. Petrak s.n. | Aug 1922 | — | — | — |
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| Cylindrobasidium evolvens (Fr.) Jülich | F. Petrak 212 | Sep 1923 | — | — | — |
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| Dendrothele acerina (Pers.) P.A.Lemke | F. Petrak s.n. | Oct 1924 | Czech Republic | — | Moravia, M. Weisskirchen | — |
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| Peniophora mutata (Peck) Bres. | F. Petrak s.n. | Sep 1928 | Czech Republic | — | M.-Weißkirchen: Podhorn. | — |
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| Peniophora sanguinea (Fr.) Höhn. & Litsch. | F. Petrak s.n. | Aug 1933 | — | — | — |
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| Trametes gibbosa (Pers.) Fr. | F. Petrak 473 | Sep 1925 | — | — | — |
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| Trametes suaveolens (L.:Fr.) Fr. | F. Petrak 273 | Sep 1923 | — | — | — |
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| Stereum sanguinolentum (Alb. & Schwein.:Fr.) Fr. | F. Petrak 270 | Aug 1923 | — | — | [Illegible precise loc.] | — |
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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 drummondii E.Mey. | F. Petrak 50181 | 09 Aug 1950 | United States of America | Wyoming | Lake Marie, Medicine Bow Mts. | — |
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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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| Synchytrium succisae de Bary & Woronin | F. Petrak s.n. | Sep 1924 | — | — | — |
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| Peronospora arborescens (Berk.) Casp. | F. Petrak s.n. | May 1923 | Poland | — | Jab?onka | — |
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| Peronospora niessliana Berl. | F. Petrak s.n. | May 1923 | — | — | — |
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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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| Peronospora radii de Bary | F. Petrak s.n. | Jun 1923 | — | — | — |
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| Peronospora sordida Berk. & Broome | F. Petrak s.n. | VIII.1923 | Czech Republic | — | West Beskids. [Possibly Pogórze Bukoskie] | — |
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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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| Plasmopara pusilla (de Bary) J.Schröt. | F. Petrak s.n. | Aug 1940 | Czech Republic | — | Moravia"in pratis ad flumen Becwa… | — |
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| Plasmopara pusilla (de Bary) J.Schröt. | F. Petrak s.n. | Aug 1940 | Germany | — | "in pratis ad flumen Becwa… | — |
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| Taphrina epiphylla (Sadeb.) Sacc. | F. Petrak s.n. | Jun 1923 | — | — | — |
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| Taphrina populina Fr. | F. Petrak s.n. | Jun 1923 | Slovakia | — | ...Leutschau [Levoca] | — |
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| Taphrina tosquinetii (Westend.) Magnus | F. Petrak s.n. | Aug 1923 | — | — | — |
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| Calosphaeria abnormis (Fr.) Höhn. | F. Petrak s.n. | Aug 1914 | Austria | — | Weisskirchen | — |
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| Chalcosphaeria pustula (Pers.) Höhn. | F. Petrak s.n. | May 1936 | Germany | — | Weißkirchen, Marienthal | — |
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| Cryptodiaporthe aesculi (Fuckel) Petr. | F. Petrak s.n. | Sep 1920 | Germany | — | Weisskirchen | — |
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| Cryptospora suffusa (Fr.) Tul. & C.Tul. | F. Petrak 3525 | Oct. 1942 | Czech Republic | — | Moravia orient.: ad ripam fluminis… | — |
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| Cryptospora suffusa (Fr.) Tul. & C.Tul. | F. Petrak 3525 | Oct. 1942 | — | — | Moravia orient: ad ripam fluminis… | — |
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| Cryptospora suffusa (Fr.) Tul. & C.Tul. | F. Petrak 606 | 9.V.1918 | — | — | — |
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| Cryptospora suffusa (Fr.) Tul. & C.Tul. | F. Petrak 629 | 23.I.1918 | — | — | — |
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| Cryptosporella leptasca (Peck & Clinton) Sacc. | F. Petrak 2033 | Sep 1912 | — | — | Mahrisch Weisskirchen | — |
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| Diaporthe arctii (Lasch) Nitschke | F. Petrak 3527 | Jul 1936 | — | — | Moravia orient.: in arenosis ad… | — |
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