Marrubium

(-roo'be-um.) (Bot.) A genus of herbaceous plants, O. Lamiacea. The Common or White Horehound, M. vulgare, naturalized in the U. States, has an erect branched stem densely covered with cottony white hair. It has bitter tonic properties, and was once employed in many diseases, but has fallen into disuse except as a domestic remedy in chest com. plain ts. [s. 580]