Touriga Nacional - Portugal's finest
Touriga leaf
Touriga Nacional is a variety of red wine grape, considered by many to be Portugal's finest. Despite the notoriously low yields from its small grapes, it plays a big part in the blends used for the best ports, and is increasingly being used for table wine in the Douro and Dao.
Touriga Nacional provides structure and body to wine, with high tannins and concentrated flavours of black fruit. Jancis Robinson has compared its relationship with Touriga Francesa to the partnership between Cabernet Sauvignon and Cabernet Franc, the former providing structure, the latter filling out the bouquet.
Info from Wikipedia.