What is "marrubium vulgare"

Horehound \Hore"hound`\, n. [OE. horehune, AS. h[=a]rhune; h[=a]r hoar, gray + hune horehound; cf. L. cunila a species of organum, Gr. ?, Skr. kn?y to smell.] (Bot.)

1. A plant of the genus Marrubium ( Marrubium vulgare), which has a bitter taste, and is a weak tonic, used as a household remedy for colds, coughing, etc. [Written also hoarhound.]

2. A lozenge or tablet, usually sweetened, containing extract of horehound, used as a remedy for a cough or a sore throat.

   Fetid horehound, or Black horehound, a disagreeable plant resembling horehound ( Ballota nigra).

   Water horehound, a species of the genus Lycopus, resembling mint, but not aromatic.

Marrubium vulgare (white horehound or common horehound) is a flowering plant in the family Lamiaceae, native to Europe, northern Africa, and southwestern and central Asia. It is also widely naturalized in many places, including most of North and South America.

It is a grey-leaved herbaceous perennial plant, somewhat resembling mint in appearance, and grows to tall. The leaves are long with a densely crinkled surface, and are covered in downy hairs. The flowers are white, borne in clusters on the upper part of the main stem.