 The grapevines were misidentified until only recently when ampelographers discovered the error.True Grand Noir de la Calmette does exist in California with two vineyards, in Windsor, California located in the Russian River Valley AVA of Sonoma County and Kuchan Cellars of Morgan Hill,California in Santa Clara Valley AVA having old vines that date back to the early 1900s.Grand Noir de la Calmette is a high yielding grape variety that needs to be kept in check by winter pruning or green harvesting.