Thanks Lori - First I knew it as Lamium - then Lamiastrum ...and now Lamium again...
You are really strange people. There are no currently obligatory names in botany, really.
Who thinks the differences are not important calls it
Lamium, who thinks the
differences are important calls it
Lamiastrum. That's all. I prefer
Lamium.
You can prefer the former or the latter, either is correct.
By the way, it is a weedy species in shaded gardens which is native to the woods
around Brno too. It needs steady renewing by stolons.