The white grape variety is a new variety between Tramín Cervený(Gewürztraminer) x Veltlínske Červené Biele (Rotweißer Veltliner) Incidentally, the new variety Hetera was created with the same parents. Synonyms are Ryvola (was the first name) and TCVCB 15/4, which was crossed in 1958 in Slovakia (then Czechoslovakia) by Dorata Pospisilova and Ondrej Korpas. Plant variety protection was granted in 1998. The medium to late-maturing, high-yielding vine is resistant to frost and downy mildew, but susceptible to botrytis. It produces full-bodied, alcoholic, aromatic white wines with floral aromas. It is cultivated in Slovakia (133 ha) and the Czech Republic (19 ha). In 2010, it occupied a total of 152 hectares of vineyards (Kym Anderson).