Square stems are spreading on the soil in a corner of a vegetable garden or in a field. They carry small dented leaves with a purple tinge.
Cut-leaved Dead-nettle (Lamium hybridum) looks very much like its slightly bigger brother Red Dead-nettle, but the stems of this last one are more or less upright. Both spiecies grow in the same kind of environment. But, because one of them (the red) is much more common as the other one (the cut-leaved) there is a difference in their respective requirements. If not, both species would be common or one of them would disappear.
Hidden between the leaves there are tiny pink flowers.