One of my favorite ground covers. The leaves are silvery and it has bright yellow flowers in the late spring. Height is about 8 inches, so this isn't something you walk on, but it will grow in pretty dense shade and fills in well enough to keep weeds from growing - always a plus. Not a good thing for a small space, but it is easy to keep under control as it pulls out easily. We have several large patches, one under a Norway Spruce where nothing else would grow. It seems to be drought resistant as it wasn't bothered last summer when we had virtually no rain for 10 weeks or so. I think it is related somehow to the Lamiums which would be no surprise since the leaves are similar though much, much larger.