The Fuhse is a stream of Lower Saxony, Germany, a left tributary of the Aller. Spelled Fuse in maps of the 19th century and earlier, the name is thought to derive from the ancient Fosa flumen, after which the Germanic tribe of the Fosi took their name (or vice versa).The Fuhse originates on the west slope of the Oderwald, foothills of the Harz range between Bad Harzburg und Wolfenbüttel. The source spring lies in the municipality of Flöthe near Schladen.