TROUSSEAU GRIS: Mutated version of the Trousseaugrape found in the Jura region of France. Thought to be the grape misleadingly known as the Grey Riesling in California although it has no relationship with the Riesling cepage.
TROUSSEAU: Red-winegrape sparsely grown in several regions of southern France. Recently investigated as one of the varities found in vineyards and collectively known as Petite Sirah in California.
Other grapes known to be present in some Petite Syrah vineyards are the Mondeuse and Trousseau. Traditional Californian blends under the name of Petite Sirah are also known to have contained a proportion Barbera or Zinfandelgrapewine.