Tussilago
Encyclopedia
Tussilago is a genus of plants. T. farfara is the coltsfoot
Coltsfoot
Tussilago farfara, commonly known as Coltsfoot, is a plant in the family Asteraceae.It has been used medicinally as a cough suppressant. The name "tussilago" itself means "cough suppressant." The plant has been used historically to treat lung ailments such as asthma as well as various coughs by way...

. Many of the species are often placed in other genera, such as Homogyne
Homogyne
Homogyne is a genus of flowering plants in the daisy family, Asteraceae.-Selected species:*Homogyne alpina*Homogyne discolor*Homogyne sylvestris...

, Petasites
Butterbur
The plants commonly referred to as Butterbur are found in the daisy family Asteraceae in the genus Petasites. They are mostly quite robust plants with thick, creeping underground rhizomes and large Rhubarb-like leaves during the growing season...

or Adenostyles.
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