Horehound, or Hoarhound, a perennial herb of the mint family. The name means “hoary (whitish) plant.” There are more than 30 species. The common white horehound is native to Europe, but is widely grown in North America. The plant has a square, hairy stem about three feet (90 cm) high. Its wrinkled, oval leaves are coated with a hoary down. Small white flowers grow in dense clusters at the bases of the leaves. The leaves and tops yield a bitter-tasting, aromatic oil used in candy, cough remedies, stomach tonics, and laxatives. Horehound can be raised from either seeds or cuttings.
The white horehound is Marrubium vulgare of the family Labiatae.