Refosco di Faedis - a variety cultivated in Faedis region, Torreano di Cividale, Povoletto, Attimis, Nimis in northeast region of Province of Udine.
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It is believed that one of the reasons the Habsburgs build the Parenzana railway from Trieste to Poreč was because they liked the wines from the region (Refosco, Malvasia and Teran).
Ampelographers have long thought Refosco dal Peduncolo Rosso was related to the Marzemino grape of the San Michele all'Adige region of Trentino.
From 2003 to 2008, DNA analysis showed that the Gattera and Borgogna grapes from the commune of Castelcucco in the province of Treviso and the Refosco di Guarnieri grape from the Friuli-Venezia Giulia wine region were identical to Trevisana nera.