Coltsfoot

Overview

Coltsfoot does something no other common plant in the British flora does: it flowers before it produces leaves. In February and March, on bare clay banks and disturbed ground, the golden daisy-like flowers appear on scaly, pale stems with no hint of greenery — solitary, purposeful, and early enough that they are often mistaken for out-of-season dandelions by those who haven't been paying attention. The large, hoof-shaped leaves come later, silvery beneath, and give the plant its name. Tussilago derives from tussis, cough, because coltsfoot is above all a cough herb — one of the oldest and most persistent in the European tradition. The leaves were smoked for cough, made into syrup, applied as poultice. It works. It also contains pyrrolizidine alkaloids, which cause liver damage. The archive holds both things.

Botanical Notes

A rhizomatous perennial that spreads aggressively by underground stems. Flowers appear in February to April on scaly, pale lavender stems before the leaves emerge — golden composite heads that close at night and in bad weather. The large, roundly heart-shaped to hoof-shaped leaves appear in April to May, dark green above, densely white-felted beneath. Found on bare, disturbed, clay or calcareous soil — landslips, roadsides, stream banks, construction sites — throughout Europe and Asia, naturalized in North America. The leaves and flowers contain mucilage, flavonoids, and tussilagine and senkirkine, pyrrolizidine alkaloids with hepatotoxic potential.

Lore & History

The image of coltsfoot flowers was traditionally used as a sign above French pharmacies — a recognition of the plant's role as one of the primary medicinal herbs of the European tradition. In Britain, coltsfoot rock — a hard boiled sweet flavoured with the plant's extract — was sold in chemists as a cough sweet well into the twentieth century. The leaves, dried and smoked as a herbal tobacco substitute, appear in herbal smoking mixtures sold under names like "British herb tobacco," a practice that persisted until the pyrrolizidine content became a regulatory concern. Native American peoples adopted it rapidly after European introduction for the same cough use the Europeans had. The underground rhizome system is so extensive that coltsfoot can colonise apparently bare ground as if from nowhere.

Warnings