The white grape variety originates either from Istria-Croatia or from Veneto-Italy. Synonyms are Gargana, Ghera, Glere, Grappolo Spargolo, Prosecco, Prosecco Balbi, Prosecco Bianco, Prosecco Nostrano, Prosecco Tondo, Sciprina, Serpina, Serprina, Serprino, Uva Pissona (Italy); Briska Glera, Gljera, Steverjana (Slovenia); Beli Teran, Bresanka, Prosekar, Proseko, Teran Bijeli (Croatia). Despite seemingly suggestive synonyms or morphological similarities, it must not be confused with the varieties Glera L unga (Prosecco Lungo), Malvasia Bianca Lunga (Prosecco Nostrano) or Perera. Until 2009, the officially valid main name was Prosecco (Prosecco Tondo); the change to Glera subsequently led to some confusion, some of which continues to this day. Since then, Prosecco has been a protected designation of origin.
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