A mutation (also Ugni Blanc à Feuilles Persillées) of the Trebbiano Toscano grape variety; see there.
The white grape variety originates from Italy. There are about 120 synonyms that indicate the vine's great age and wide distribution. Some of them, grouped alphabetically by country, are Ugni Blanc (Argentina); White Shiraz (Australia); Ugni Blanc (Bulgaria); Regrat (Germany); Armenian, Blanc de Cadillac, Chauche Gris, Clairette à Grains Ronds, Clairette de Afrique, Clairette de Vence, Clairette Ronde, Gredelin, Morterille Blanche, Muscadet, Muscadet Aigre, Rolle, Roussan, Saint Émilion, Saint Émilion des Charentes, Ugni Bl anc = second main name (France); Balsamina Bianca, Bianca di Poviglio, Bianchello, Bianchetto, Biancone, Botticino Bianca, Brocanico, Buzzetto, Lugana, Morbidella, Procanico, Procanico dell'Isola d'Elba, Romani, Rossola, Rusciola, Senese, Sinese, Spoletino, Trebbiana Fiorentina, Trebbianello, Trebbiano della Fiamma, Trebbiano di Cesena, Trebbiano di Empoli, Trebbiano di Lucca, Trebbiano di Toscana, Trebbiano Fiorentino, Trebbiano Perugino, Uva Bianca (Italy); Rossola Brandcina, Rossola Brandisca (Corsica); Rogoznička, Šijaka, Ugni Blanc (Croatia); Branquinha, Alfrocheiro Branco, Douradina Branco, Douradinha, Douradinha dos Vinhos Verdes, Douradinho, Espadeiro Branco, Padeiro Branco, Tália, Thalia (Portugal); Uni Belyi (Russia); Ugni Blanc (Uruguay); St Emilion, White Hermitage (USA).
It should not be confused with the varieties Albanella, Biancame, Douradinha,...
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The glossary is a monumental achievement and one of the most important contributions to wine knowledge. Of all the encyclopaedias I use on the subject of wine, it is by far the most important. That was the case ten years ago and it hasn't changed since.
Andreas Essl
Autor, Modena