The red grape variety probably originates from Austria. Synonyms include Große Kauka, Kavka Gross, Peterleinstraube, Piazha, Piazhneck, Piazhnek, Plant Madame, Raisin Rouge, Rosenkranz, Sauerschwarz, Schwarzer Heunisch, Sparse Gros, Staatmacher and Thalroth. Despite the name, it is not related to the varieties White Heunisch (Gouais Blanc) or Red Heunisch. According to DNA analyses last carried out in 2020, it originates from a presumably natural cross between Feridac x unknown partner. It is an all-female grape variety. Confusingly, however, there is also an independent variety called Black Heunish, which is very much related to Gouais Blanc. It is suspected that the name was given due to morphological similarities. No stocks were reported in 2016 (Kym Anderson statistics). See a list of all varieties of the large Heunisch group under Gouais Bl anc.
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