Tussilago farfara, commonly known as coltsfoot, is a plant in the groundsel tribe in the daisy family Asteraceae, native to Europe and parts of western and central Asia. The name "tussilago" is derived from the Latin tussis, meaning cough, and ago, meaning to cast or to act on. It has had uses in traditional medicine, but the discovery of toxic pyrrolizidine alkaloids in the plant has resulted in liver health concerns.
Tussilago farfara is the only accepted species in the genus Tussilago, although more than two dozen other species have at one time or another been considered part of this group. Most of them are now regarded as members of other genera (Chaptalia, Chevreulia, Farfugium, Homogyne, Leibnitzia, Petasites, Senecio).
From Middle English coltisfote, coltys fot, equivalent to colt + -s- + foot.
coltsfoot (plural coltsfoots or coltsfeet)
- An herbaceous plant, species Tussilago farfara, that grows in Europe and the Middle East.
- Various flowering plants in the genus Petasites native to Europe or Asia.
- Homogyne alpina (alpine coltsfoot or purple colt's-foot).