Common hemp-nettle (Galeopsis tetrahit) belongs to the Lamiaceae (the Mint family). It is an annual herb that is native to Europe and northwestern Asia. This herb grows in open woods, heaths, paths and waste places, and can reach 30-60 cm in height. The stem is square and covered with rough hairs. The leaves are lanceolate to broadly ovate, pointed, and toothed. The pale pinkish-purple with darker markings flowers bloom from July to October.