Trevisana Nera is a red grape variety native to Italy. It is identical to Refosco di Guarnieri. 

Where grown: In the Veneto, limited to a few vineyards in and around Belluno.

Viticulture: Large-sized, medium-compact bunches. Large berries. Vigorous and productive.

Bibliography

See Dr Ian d’Agata, Native Wine Grapes of Italy (University of California Press, 2014).

Italian Wine Unplugged (Positive Press, 2017), p.288.