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Viosinho is often used as a blending variety in Port wine production.
Viosinho is a white Portuguese wine grape variety that is grown primarily in northern Portugal where it attains high acidity levels. It is primarily found in the Trás-os-Montes and Douro DOCs.[1] It is used primarily as a blending grape where it adds structures and flavor to both still and fortified Port wines.[2]

References[edit]
[1] ^ J. Robinson Jancis Robinson's Guide to Wine Grapes pg 198 Oxford University Press 1996 ISBN 0198600984
[2] ^ Oz Clarke Encyclopedia of Grapes pg 284 Harcourt Books 2001 ISBN 0-15-100714-4
wino17234#532266