Which plant's Latin name literally means "act on cough"?

"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. Coltsfoot superficially resembles dandelions.

It has had uses in traditional medicine, but the discovery of toxic pyrrolizidine alkaloids in the plant has resulted in liver health concerns.

The common name comes from the leaf's supposed resemblance to a colt's foot. Other common names include tash plant, ass's foot, bull's foot, coughwort (Old English), farfara, foal's foot, foalswort, and horse foot.