Possibly there were/are several grape varieties with the name part Scheuchner. The VIVC catalogue lists three varieties with Scheuchner in the main name or as a synonym. These are the three red Scheuchner Blau (Grübler, Pommer, Scheuchner, Schwarzer Grübler), Schwarzblauer Scheuchner(Alicantetraube, Bommer, Grübler) and as a synonym for Blauer Kölner(Žametovka) also Scheuchner Blau, as well as a white one called Scheuchner Weiß. Whether they are actually all independent varieties is unclear and rather doubtful. The partly common synonyms add to the confusion.
In any case, in 1815, the court botanist Johann Simon Kerner (1755-1830) depicted a variety called Blauer Scheuchner in his catalogue of grape varieties. It (the same one?) was first mentioned in 1766 by Balthasar Sprenger (1724-1791) with reference to its origin in Ödenburg (Sopron) in Hungary. A variety of this name used to be common in Germany. In 2006, it was rediscovered in old vineyards on the Badische Bergstraße near Heidelberg. Vine researcher Andreas Jung suspects that it is identical to the Croatian variety Tribidrag (Primitivo/Italy, Zinfandel/USA). In 2016, no stocks were identified under these names (Kym Anderson).
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