Welschriesling is a genetic offspring of riesling.
Despite the word riesling in its name, welschriesling (pronounced: WELSH-rees-ling) is not directly related to riesling at all. In Burgenland, Austria, welschriesling is used to make delicious late-harvest, botrytized wines. In Hungary, it’s known as graševina and olasz rizling. In Italy, it’s known as riesling italico. There are numerous grapes with the word riesling in their names that are not riesling. These include: cape riesling in South Africa and emerald riesling in the U.S. (The latter is a cross of muscadelle and garnacha developed at the University of California at Davis).