Canadian Wild Ginger, Asarum canadense, as its name might imply, is most commonly found in Canada, where it may have originated. It has spread, and the USDA lists its distribution as throughout most of the eastern half of the US. A hardy shade perennial that needs moisture, it has violet-like leaves on slightly fuzzy stems, and grows about 4" above the ground, forming a nice cover. In masses, it's a good native alternative to pachysandra, and looks beautiful as a low border in front of ferns.