The dead-nettle (lamium) family are distantly related to the stinging nettle. They can be annual or perennial species spreading by seed dispersal and stems rooting. Those cultivars selected for garden use are less invasive than the vigorous perennial, Lamium album. This has white flowers produced in whorls popular with bees. Lamium species are also used as a food plant of many butterflies.
How to get rid of it: Invasive plants can be removed by digging them out with a fork and carefully removing all stem fragments.