An annual, 60 cm—1.2 m (2-4 ft.) high, it has longer, more lance late leaves than those of C. bonus-henricus and a strong acrid scent. The tiny, green flowers are followed by small nutlike, one-seeded fruits.
History and traditions
American wormseed was introduced to Europe in the 17th century from Mexico, where it was taken as a tea and used in traditional medicine.
Growth
Frost-hardy (to -5°C/23°F), American wormseed grows in any well-drained soil. Propagated by seed sown in spring; in warm climates it often self-seeds freely.
Uses
Medicinal
Its chief use has always been to expel intestinal worms. It has also been recommended for nervous disorders, asthma and problems with menstruation. The volatile oil of chenopodium is a powerful insecticide as well as a vermifuge, but should never be administered in this concentrated form as it is highly toxic.
