Horehound

Horehound, most often the white horehound Marrubium vulgare, is a downy, bitter-tasting perennial of the mint family, an old cottage-garden and waste-ground herb of Europe and the Mediterranean. Its ancient standing was high: the Egyptians are reported to have called it the Seed of Horus or the Bull's Blood and used it among the priests, and it is often counted among the bitter herbs of the Jewish Passover, though the identification is uncertain. Its long domestic use was as a cough remedy, preserved in the horehound candies and syrups still sold, a use recorded here as folk history rather than medical claim.

Modern phytochemistry has given some real support to horehound's old reputation for the chest: the plant's characteristic bitterness comes chiefly from marrubiin, a compound that has shown expectorant and mild bronchodilator activity in laboratory and animal studies, one of the relatively few traditional cough herbs with any modern pharmacological grounding, though it remains a folk remedy and cough sweet rather than a tested clinical treatment. Horehound ale, a bitter herbal beer flavoured with the plant, was also brewed in England before hops became the standard bittering agent, a once-common drink now almost entirely forgotten.

Culpeper placed horehound under Mercury, the ruler of the breath and the airy passages, which fitted its long reputation as a herb for the chest. In folk magic its intense bitterness gave it a protective and counter-magical role: horehound was used to break spells and to guard against sorcery, and classical writers list it among the plants that dispel enchantment. Its meanings, clearing, protection, the breaking of harm, follow directly from its two plain properties, a piercing bitterness and a clearing effect on the breath. A homely, hardy, unglamorous herb, horehound carries an old and consistent reputation as a plant of protection and relief.

Dioscorides, the first-century Greek physician whose materia medica shaped western herbalism for over a thousand years, recommended horehound specifically against the bites of venomous creatures as well as for coughs, a double reputation, poison and protection, that matches its later folk role as a herb that broke curses and turned back harm. The plant's Latin genus name, Marrubium, is of obscure and disputed origin, variously traced to a Hebrew word for a bitter juice or to an old Italian place name, a small case where even its formal scientific name carries an unresolved etymological question.