The white grape variety (also Merlara) comes from Italy. It should not be confused with the morphologically similar variety Santa Maria. The parentage (parenthood) is unknown. The medium to late ripening vine produces white wines with a subtle muscatel tone. It is cultivated in the province of Piacenza in the Emilia-Romagna region, where it is permitted in the DOC wine Colli Piacentini. In 2016, 1.5 hectares of vineyard area were designated with a decreasing tendency (Kym Anderson).
Pictures: M.I.P.A.A.F - National Vine Certification Service
There is a vast number of sources on the web where one can acquire knowledge about wine. But none has the scope, timeliness and accuracy of the information in the encyclopaedia at wein.plus. I use it regularly and rely on it.
Sigi Hiss
freier Autor und Weinberater (Fine, Vinum u.a.), Bad Krozingen