Doña Blanca
Doña Blanca is a white Spanish and Portuguese grape variety that is grown primarily in the northwest Galicia region of Spain and throughout Portugal from the Douro northward. The variety is a permitted grape in the Spanish Denominación de Origens of Valdeorras and Monterrei in Galicia and Bierzo in nearby Castile and León. In Spain, the variety is known as Doña Blanca, while in Portugal it goes mainly by the name Dona Branca. The grapes have thick skins, which do well in the wet maritime climate, but it can also impart some astringency and slight bitterness even with the briefest of skin contact during production due to the high proportion of polyphenols in the skin.