Coltsfoot (Tussilago farfara) vs Lungwort (Pulmonaria officinalis)

Coltsfoot (Tussilago farfara)

Lungwort (Pulmonaria officinalis)

About

Coltsfoot is a perennial herb growing to 12 inches with flowering stems covered in purple scales, yellow-gold flowers, and heart-shaped leaves. Indigenous to Europe and northern Asia and naturalized in North America, it is commonly found along roadsides, on verges, and in open areas. The flowers are gathered in late winter, and the leaves in summer.

Lungwort is a perennial herb growing to 1 foot with broad oval basal leaves, smaller upper leaves mottled with white spots, and clusters of pink-purple flowers. Native to Europe and the Caucasus, it flourishes in mountain pastures and damp sites. The leaves are gathered in late spring. According to the medieval Doctrine of Signatures, which held that a plant's appearance pointed to the ailment it treated, lungwort got its name because its leaves were said to resemble lung tissue. This folk belief is not scientifically founded.

Safety & precautions

Liver toxicity: Coltsfoot contains pyrrolizidine alkaloids. LiverTox describes these compounds as able to cause sinusoidal obstruction syndrome, a serious form of liver injury, and in 2001 the U.S. FDA advised that supplements containing comfrey or other plants that supply these alkaloids be removed from the market. Do not take coltsfoot by mouth. Do not use it during pregnancy, when breastfeeding, or for children. Subject to legal restrictions in some countries.

Subject to legal restrictions in some countries. Pyrrolizidine alkaloids, which can harm the liver, occur in the roots and are reported in smaller amounts in the leaves. Use only the leaves, not the roots, and ask a professional first.

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