Marrubium vulgare Identity & Plant Part
The botanical entity is Marrubium vulgare L., white horehound, a perennial of the Lamiaceae with woolly white stems, wrinkled gray-green leaves and whorled clusters of small white flowers. The part used is the aerial part, meaning leaf and flowering top. The root is not part of this ingredient. Black horehound, Ballota nigra, and the water horehound called bugleweed, Lycopus, are separate plants that share part of the name. Labdane diterpene lactones with a bitter taste, phenolic acids and flavonoids are the constituent families of horehound, named here without figures.












