Negrara | A group of several distinct grapevines found in northern Italy which have highly diverse morphological and phenological characteristics as well as geographic origins. They were grouped together because of a generic dark or black (‘negra’) hue to their bloom-covered berries. They are found mainly in Trentino and Veneto (particularly in the province of Verona). 

See | Negrara Trentina. | Negrara Veronese

Bibliography

Italian Wine Unplugged (Positive Press, 2017), p146-7.

Oxford Companion to Wine 4th edition ed. Jancis Robinson MW and Julia Harding MW (Oxford University Press, 2015), p.496 by Dr José Vouillamoz