The white grape variety originates from Hungary. The name means "blue stem" and refers to the slightly bluish stem colour. Synonyms are Balafant, Blaustängler, Blaustiel, Blaustingl and Piros Kéknyelű.

According to DNA analyses carried out in 2021, it originates from a presumably natural cross between Vulpea x unknown father variety. Despite some synonyms and morphological similarities, it should not be confused with the Hungarian varieties Balafánt and Furmint or the Italian Picolit (which was long considered identical). It is a purely female grape variety. For this reason, the Budai Zöld variety is often grown in the neighbourhood for fertilisation. The variety was a crossing partner in the new Rózsakö variety.
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