Marrubium vulgare, commonly known as white horehound, is a perennial herb native to Europe, North Africa, and parts of Asia. It typically grows in dry, rocky areas and can reach heights of 30 to 60 centimeters. The plant features square stems, opposite leaves, and small white flowers that bloom in clusters. This herb has been traditionally used in herbal medicine for its potential benefits in treating respiratory issues, such as coughs and bronchitis. The leaves contain compounds that may help soothe irritation and promote mucus expulsion, making it a popular choice in natural remedies and herbal teas.