Horehound (Marrubium vulgare) is a small, perennial shrub that looks like mint. It is native to temperate parts of Eurasia, Europe, the Middle East and the Mediterranean region, including North Africa. It was first recorded as naturalised in New Zealand in 1867, and had been classified as a weed by 1902. It is also an acknowledged weed in Australia, southern USA and South America. Horehound is not palatable to stock, and taints the meat of animals that are forced to graze on it.