Erigeron acer is a species of flowering plant known by different names across the world. Some of its common synonyms include Conyza acer, Erigeron acris, and Conyzopsis acer. The plant has several medicinal and herbal properties and is used to treat several ailments such as inflammation, coughs, and respiratory problems. Erigeron acer is a member of the Asteraceae family and produces small, white, and yellow flowers that bloom between May and August. It is found in North America, Europe, and Asia and grows in fields, meadows, and roadsides. Erigeron acer is commonly referred to as the Eastern daisy fleabane, daisy fleabane, or white-topped aster.