The plants are poisonous. Several species are widespread weeds and some are used as medicinal herbs. Species include: ... Found on http://en.wikipedia.org/wiki/Galeopsis
Galeopsis is a genus of plants of the family Labiatae characterized by the equally five-toothed calyx. They are herbaceous plants with square stems usually clothed with sharp bristly hairs, nettle-like leaves on long stalks, and red, white or yellow Labiate flowers. Found on http://www.probertencyclopaedia.com/browse/BG.HTM