The dried leaves of coltsfoot make a tea that has been used for centuries for cough, congestion, asthma, emphysema and any other respiratory problem. Its expectorant properties make it excellent for this use. It is also astringent and emollient, making it a soothing substance for lungs and bronchial passages. Coltsfoot grows wild in damp areas along stream beds and the edges of meadows. It is perennial. The flowers can be used but it’s primarily the mature leaves that are harvested and dried for use as tea. I’ve seen coltsfoot leaves and some are as large as a dinner plate making it one, big baby horse.