Reinette Grise du Canada is a popular French russet apple. Its origins are not clear - it is possibly a sport of Reinette du Canada, but this is not certain. The main difference is that the Reinette Grise has a far more complete russeted skin, whereas Reinette du Canada usually has only partial russeting.
The more consistent russeting means that the Reinette Grise is more widely grown commercially, and is the form most likely to be seen in French supermarkets, where confusingly it is usually sold as "Canada". Like Reinette du Canada, Reinette Grise du Canada is a mainstay of French apple cookery. Its spicy flavour and consistency when cooked also make it ideal for apple strudel.
Eaten fresh it has the sweet flavour typical of many russet apples.