Arbanne
Arbanne is a RARE, lesser-known grape variety that is primarily grown in the Champagne region of France. Historically grown in the Aube region of Champagne, it has now pretty much all but disappeared from the vineyards. Wikipedia states there is less than 1 hectare (2.5 acres) left in France in 2006. However, despite its rarity, it is still permitted grape variety to be blended with Chardonnay, Pinot noir and Pinot Meunier and a few other varieties in the Champagne cuvée. You can find this grape in the BAM Champagne by Tarlant.