Mine where starts from @thistlebloom , she sent them to me after a bad summer of drought did in ALL my ground cover and then some. It stayed around all of last summer and came back BIGGER than ever this spring!
I mowed an area near Lamium and caught a piece in the mower. Spouse dumped the grass collector in a hole in the woods. This year there is a growing spot of Lamium about the size of a small bathroom floor. Looks just lovely and it is killing out all the garlic-mustard that had been growing there. Still, I'm not sure I want a wooded area covered in nothing but Lamium.
I have white, pink, and purple flowering Lamium. I've heard there is a yellow-flowering Lamium, but haven't seen it/gotten it yet.