Leonorus cardiaca, known as motherwort, is an herbaceous perennial plant in the mint family, Lamiaceae. Other common names include throw-wort, lion’s ear, and lion’s tail.
Motherwort is probably native to the southeastern part of Europe and central Asia where it has been cultivated since ancient times. Its natural habitat is beside roadsides, in vacant fields, waste ground, rubbish dumps and other disturbed areas. This plant prefers well drained soil and a partly shady location. Introduced to North America as a bee foraging plant and to attract bumble bees, this perennial herb is now considered invasive. It is hardy in USDA climate zones. It is now found worldwide, spread largely due to its use as a herbal remedy.