Schwarzriesling - only growth and shape are common to Riesling
Although the name literally means "black Riesling," this variety is not related to Riesling at all. In fact, it is a mutation of Spätburgunder (Pinot Noir) that ripens quite early.
The wines are deep in colour, but mostly not as complex as the wines made from Spätburgunder grapes. Frequently, the Schwarzriesling is referred to by its synonym, "Müllerrebe", and in France it is known as Pinot Meunier, where it is part of many champagne cuvées.
Black Riesling is particularly popular with the Württembergers, but not only there. At table, it is an interesting alternative to Pinot Noir.