An obscure black grape whichever way you slice it, Charbono is the Californian name for a virtually extinct French variety called Corbeau, also known as Charbonneau, itself a synonym of Douce Noire, which evidently is the same as Italy's Dolcetto. The scant amount of Charbono grown in California's Napa and Mendocino Valleys yields very dark wines that feature vibrant cherry fruit or lackluster flavors (depending on your point of view), tingling acidity, gruff tannins, and more than a passing resemblance to Barbera.